Contents

Title and Copyright Information

Preface

Intended Audience

Documentation Accessibility

Oracle BI Discoverer Keyboard Navigation

Related Documents

Conventions

JGoodies License Agreement

1 Introducing the Discoverer Web Services API

1.1 What is the Simple Object Access Protocol?

1.2 What are the Oracle BI Discoverer Web Services?

1.3 What is the SOAP endpoint URL for Discoverer Web Services?

1.4 What is the WSDL format?

1.5 About authentication and authorization

1.6 What modes of connecting to Discoverer are supported?

1.7 About maintaining Discoverer Web Service sessions

1.8 About managing the Discoverer session pool size

1.9 What are the availability requirements?

1.10 About error messages

1.11 How do you diagnose problems?

1.12 What is required to invoke the Discoverer Web Services?

1.12.1 Defining a trusted user to access Discoverer Web Services

1.12.2 Verifying access to the Discoverer Web Services

1.12.3 Setting values for Discoverer Web Services using Oracle Fusion Middleware Control

1.12.4 Creating web service client stubs (web service proxy)

1.12.5 Setting the Session Maintain Property

1.12.6 Writing a client application to invoke web services using generated web service client stubs

1.13 What is a typical flow of events for accessing Discoverer Web Services API to return results?

1.14 Typical flow of events: Detailed task examples

1.14.1 Provide the credentials to invoke Discoverer Web Services

1.14.2 Use the identifier to invoke login()

1.14.3 Secure Access to Discoverer Web Services for Oracle E-Business Suite Users

1.14.4 Inspect the connection information by invoking getConnectionList()

1.14.5 Select a particular connection and invoke getFolderEntryList()

1.14.6 Select a particular worksheet by invoking getWorksheetList()

1.14.7 Get the layout of the worksheet by invoking getLayoutMetadata()

1.14.8 Select the parameter metadata for a worksheet by invoking getParameterMetadata()

1.14.9 Select a worksheet parameter and obtain its LOVs by invoking getParameterValueList()

1.14.10 Select worksheet parameters and obtain LOVs in the cascading style by invoking getCascadeParameterValueList()

1.14.11 Submit a worksheet query (including parameters) by invoking submitWorksheetQuery()

1.14.12 Check the status of the query by invoking getQueryStatus()

1.14.13 View worksheet data on completion of the query by invoking getWorksheetData()

1.14.14 Log out, by invoking Logout()

1.15 Example of a Java class that invokes Discoverer Web Services

2 Discoverer Web Services API Reference

2.1 AppsConnect

2.2 getConnectionList

2.3 getFolderEntryList

2.4 getLayoutMetaData

2.5 getParameterMetaData

2.6 getParameterValueList

2.7 getCascadeParameterValueList

2.8 getQueryStatus

2.9 getVersion

2.10 getViewerURL

2.11 getWorksheetData

2.12 getWorkSheetList

2.13 isSessionValid

2.14 login

2.15 logout

2.16 requestQueryCancel

2.17 submitWorksheetQuery

Index

Oracle® Fusion Middleware

User's Guide for Oracle Business Intelligence Discoverer Web Services API

11g Release 1 (11.1.1)

E10412-04

November 2011

This document describes the Discoverer Web Services API. It also provides reference information to help you use the API to access Discoverer connections and workbooks.

Oracle Fusion Middleware User's Guide for Oracle Business Intelligence Discoverer Web Services API 11g Release 1 (11.1.1)

E10412-04

Copyright © 2011, Oracle and/or its affiliates. All rights reserved.

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Preface

Welcome to the Oracle Fusion Middleware User's Guide for Oracle Business Intelligence Discoverer Web Services API!

Intended Audience

This guide is intended for developers of applications that use Discoverer data through Discoverer Web Services. Readers are assumed to have a working knowledge of Web services.

Documentation Accessibility

For information about Oracle's commitment to accessibility, visit the Oracle Accessibility Program website at http://www.oracle.com/pls/topic/lookup?ctx=acc&id=docacc.

Access to Oracle Support

Oracle customers have access to electronic support through My Oracle Support. For information, visit http://www.oracle.com/pls/topic/lookup?ctx=acc&id=info or visit http://www.oracle.com/pls/topic/lookup?ctx=acc&id=trs if you are hearing impaired.

Oracle BI Discoverer Keyboard Navigation

Oracle BI Discoverer supports standard keyboard navigation. Standard keyboard navigation includes the use of the tab key, mnemonics (using the Alt key and the underlined character), and accelerators (such as Alt+F4 to exit a window).

Related Documents

You can access the documents referenced in this guide, and other information about Oracle Business Intelligence (for example, whitepapers, best practices, documentation updates, other collateral) on Oracle Technology Network at:

http://www.oracle.com/technology

Conventions

Conventions used in this manual are shown in the table below:

Convention | Meaning
boldface | Boldface type indicates graphical user interface elements associated with an action, or terms defined in text or the glossary.
italic | Italic type indicates book titles, emphasis, or placeholder variables for which you supply particular values.
monospace | Monospace type indicates commands within a paragraph, URLs, code in examples, text that appears on the screen, or text that you enter.
< > | Angle brackets enclose user-supplied names or values.
[] | Square brackets enclose optional clauses from which you can choose one or none.
Menu name | Command | Text in this format conveys a sequence of menu choices; for example, choose the menu, then the command under that menu.

For more information about the Discoverer Web Service API methods, see "Discoverer Web Services API Reference".

JGoodies License Agreement

Oracle Business Intelligence includes the JGoodies software, whose License Agreement follows:

Copyright© 2003 JGoodies Karsten Lentzsch. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

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1 Introducing the Discoverer Web Services API

This chapter introduces the Discoverer Web Services API and describes how to use the API. It contains the following topics:

"What is the Simple Object Access Protocol?"

"What are the Oracle BI Discoverer Web Services?"

"What is the SOAP endpoint URL for Discoverer Web Services?"

"What is the WSDL format?"

"About authentication and authorization"

"What modes of connecting to Discoverer are supported?"

"About maintaining Discoverer Web Service sessions"

"About managing the Discoverer session pool size"

"What are the availability requirements?"

"About error messages"

"How do you diagnose problems?"

"What is required to invoke the Discoverer Web Services?"

"What is a typical flow of events for accessing Discoverer Web Services API to return results?"

"Typical flow of events: Detailed task examples"

"Example of a Java class that invokes Discoverer Web Services"

1.1 What is the Simple Object Access Protocol?

SOAP (Simple Object Access Protocol) is a World Wide Web Consortium (W3C) recommendation for an XML protocol for exchanging information on the Web.

1.2 What are the Oracle BI Discoverer Web Services?

The Oracle BI Discoverer Web Services are part of an Application Programming Interface (API) that enables a client to do the following:

Obtain Discoverer connections, workbooks, and worksheets

Execute worksheet queries

Obtain worksheet content using the SOAP protocol (version 1.1 with JAX-WS/document wrapped format)

1.3 What is the SOAP endpoint URL for Discoverer Web Services?

The SOAP endpoint URL for Discoverer Web Services is http(s)://<host>:<port>/discoverer/wsi.

1.4 What is the WSDL format?

The WSDL (Web Services Definition Language) format is an industry standard that formally defines services and methods, and is used to define Discoverer Web Service APIs. Proxy classes for the services can be generated automatically.

Notes

The WSDL can be accessed from http(s)://<host>:<port>/discoverer/wsi?wsdl

This guide assumes that WSDL, SOAP technologies, and the method of generating client code from WSDL is known to a web services developer.

1.5 About authentication and authorization

The Discoverer Web Services are accessible only by trusted users. You must obtain the trusted user name and password set up by the Discoverer middle-tier administrator, to use these credentials in your code.

For a code example that includes user credentials, see Example 1-4, "Set credentials to access the protected web service".

For information about how to create trusted users, see Defining a trusted user to access Discoverer Web Services.

1.6 What modes of connecting to Discoverer are supported?

The Discoverer Web Services support Oracle Single Sign-On , Oracle Applications Single Sign-On, and public connections in the current release.

1.7 About maintaining Discoverer Web Service sessions

The Discoverer Web Services are stateful in nature. In other words, every instance of the web service client stub needs to have a single HTTP session with the Discoverer Web Service. This HTTP session can be used for all web service operations, for all client application users. For every user, the client application needs to call the login method, to inform the Discoverer Web Service about a new user session. Every user session is associated with a dedicated Discoverer session on the server side which is either created or reused from the Discoverer session pool. The associated Discoverer session is used in all interactions with the user. The client application must ensure that it calls the logout method after completing all operations for the user.

The HTTP session established between the web service client and the server is tracked by cookies and is managed by the web service.

1.8 About managing the Discoverer session pool size

It is useful to know the Discoverer session pool size, because every login() call and subsequent data fetching operation requires a Discoverer session, and every logout() call releases the session.

The maximum session pool size value can be configured (in configuration.xml) using Oracle Fusion Middleware Control. The Discoverer session clean-up operation runs periodically removing any stale or inactive DiscovererSession objects from the pool.

The SSOusername, Connectionkey, Workbook, Worksheet, and Locale methods are all used to determine which Discoverer sessions to pick up, to optimize allocation of Discoverer sessions for new login requests.

1.9 What are the availability requirements?

The Discoverer Web Services can be distributed across a cluster and have no dependency on a single point of failure. Transparent failover is not supported; therefore in the event of a failure, each client must authenticate again to create new user sessions.

1.10 About error messages

A web service API call can result in an exception that must be handled by the client. Error messages are displayed using the locale that was selected during login.

1.11 How do you diagnose problems?

You can diagnose problems from log files and from web service exceptions. You can view log entries using Oracle Fusion Middleware Control. For more information, see Oracle Fusion Middleware Configuration Guide for Oracle Business Intelligence Discoverer.

1.12 What is required to invoke the Discoverer Web Services?

To invoke the Discoverer Web Services you must comply with the following:

"Defining a trusted user to access Discoverer Web Services"

"Verifying access to the Discoverer Web Services"

"Setting values for Discoverer Web Services using Oracle Fusion Middleware Control"

"Creating web service client stubs (web service proxy)"

"Setting the Session Maintain Property"

"Writing a client application to invoke web services using generated web service client stubs"

1.12.1 Defining a trusted user to access Discoverer Web Services

Only trusted users can access Discoverer Web Services. You create trusted users by using the WebLogic Server Administration Console. For more information about creating users, see the "Create Users" topic in the WebLogic Administration Console Online Help.

Note:

By default, the Administrators group is assigned a scoped security role for the Discoverer application. To provide access to Discoverer Web Services, you can add the new user to the Administrators group.

For more information about adding users to groups, see "Add users to groups topic" in the WebLogic Administration Console Online Help.

For the new user to access Discoverer Web Services, you must assign the Discoverer scoped security role to the new user. For more information about adding users to security roles, see the "Add users to roles" topic in the WebLogic Administration Console Online Help.

1.12.2 Verifying access to the Discoverer Web Services

Before you create a Java class to invoke the Discoverer Web Services you must ensure that the Discoverer Web Services are installed and configured.

To verify that the Discoverer Web Services are installed and configured, you access the endpoint URL. If you cannot access the URL, contact the Discoverer manager.

Navigate to the link http://<host>:<port>/discoverer/wsi.

You should be prompted for the user/password created in the earlier steps.

Note: You can also use the user name and password of the 'weblogic' user that was entered during installation (for more information, see your middle tier administrator).

1.12.3 Setting values for Discoverer Web Services using Oracle Fusion Middleware Control

The maxSessions setting for Discoverer Web Services should be configured using Fusion Middleware Control. This setting specifies the maximum number of Discoverer sessions that can be active at the same time (the recommended value is 20)

For more information about configuring Discoverer Web Services using Fusion Middleware Control, see the Oracle Fusion Middleware Configuration Guide for Oracle Business Intelligence Discoverer.

1.12.4 Creating web service client stubs (web service proxy)

You can obtain a set of proxy/client files by generating them from a set of web service client libraries. Oracle Web Services provide libraries for this purpose. For more information, see Oracle Fusion Middleware Developer's Guide for Oracle Web Services.

To generate the Discoverer Web Service client from the Discoverer WSDL URL:

Display a Web browser.

Access the Discoverer WSDL URL: http://<host>:<port>/discoverer/wsi?wsdl

For more information, see "What is the WSDL format?", and "Writing a client application to invoke web services using generated web service client stubs".

1.12.5 Setting the Session Maintain Property

You must set the value of the SESSION_MAINTAIN_PROPERTY in the web service library. The SESSION_MAINTAIN_PROPERTY specifies whether sessions are stateful, and because Discoverer Web Services sessions are stateful, this property must be set to True as follows:

Map requestContext = ((BindingProvider)proxy).getRequestContext();
requestContext.put(BindingProvider.SESSION_MAINTAIN_PROPERTY,true);

Note: Each supported web service library has an equivalent SESSION_MAINTAIN_PROPERTY for maintaining stateful sessions. For more information, see your web service documentation.

1.12.6 Writing a client application to invoke web services using generated web service client stubs

The following code examples provide an illustration of a basic client application:

Example 1-1 Define a Java class

class webserviceclient
{
    public static void main(String[] args)
    {
    }
}

Example 1-2 Instantiate the web service client stub

class webserviceclient
{
    @WebServiceRef
    private static Wsi_Service wsi_Service;
    public static void main(String[] args)
    {
      wsi_Service = new Wsi_Service();
      wsiProxy proxy = wsi_Service.getWsi();
    }
}

Example 1-3 Ensure the client maintains the session

This is needed as the Discoverer web service is stateful.

class webserviceclient
{
    @WebServiceRef
    private static Wsi_Service wsi_Service;
    public static void main(String[] args)
    {
      wsi_Service = new Wsi_Service();
      wsiProxy proxy = wsi_Service.getWsi();
      Map requestContext = ((BindingProvider)proxy).getRequestContext();
      requestContext.put(BindingProvider.SESSION_MAINTAIN_PROPERTY,true);
    }
}

Example 1-4 Set credentials to access the protected web service

class webserviceclient
{
    @WebServiceRef
    private static Wsi_Service wsi_Service;
    public static void main(String[] args)
    {
     wsi_Service = new Wsi_Service();
     wsiProxy proxy = wsi_Service.getWsi();
     Map requestContext = ((BindingProvider)proxy).getRequestContext();
     requestContext.put(BindingProvider.USERNAME_PROPERTY,"username");
     requestContext.put(BindingProvider.PASSWORD_PROPERTY,"password");
     requestContext.put(BindingProvider.SESSION_MAINTAIN_PROPERTY,true);
    }
}

Example 1-5 Set the web service endpoint

class webserviceclient{    @WebServiceRef    private static Wsi_Service wsi_Service;    public static void main(String[] args)
    {
     wsi_Service = new Wsi_Service();
     wsiProxy proxy = wsi_Service.getWsi();
     Map requestContext = ((BindingProvider)proxy).getRequestContext();
     requestContext.put(BindingProvider.USERNAME_PROPERTY,"username");
     requestContext.put(BindingProvider.PASSWORD_PROPERTY,"password");
     requestContext.put(BindingProvider.ENDPOINT_ADDRESS_PROPERTY,"http://host:port/discoverer/wsi");
     requestContext.put(BindingProvider.SESSION_MAINTAIN_PROPERTY,true);
    }}

Example 1-6 Perform any web service operations on the stub

class webserviceclient{
     @WebServiceRef
     private static Wsi_Service wsi_Service;f
     public static void main(String[] args)
     {
      wsi_Service = new Wsi_Service();
      wsiProxy proxy = wsi_Service.getWsi();
      Map requestContext = ((BindingProvider)proxy).getRequestContext();
      requestContext.put(BindingProvider.USERNAME_PROPERTY,"username");
      requestContext.put(BindingProvider.PASSWORD_PROPERTY,"password");
      requestContext.put(BindingProvider.ENDPOINT_ADDRESS_PROPERTY,"http://host:port/discoverer/wsi");
      requestContext.put(BindingProvider.SESSION_MAINTAIN_PROPERTY,true);

      DisplayName displayname = new DisplayName();
      displayname.setUser("DISPLAYNAME");
      Identifier idfr = new Identifier() ;
      idfr.setId("IDENTIFIER");

      UserCredential uc = new UserCredential();
      uc.setDisplayName(displayname);
      uc.setIdentifier(idfr);

      LocaleBean locale = new LocaleBean();
      locale.setCountry("US");
      locale.setLanguage("en");
      locale.setVariant("");

      SessionKey sKey = proxy.login(uc, locale);
      proxy.logout(sKey);
    }}

Note: To compile the above client application, the web service libraries must be set in the classpath. When using the Oracle libraries, soap.jar, Http_client.jar and the downloaded proxy.jar must be present. For example, if you run the client application from the command prompt, you might set the Java classpath as follows:

set CLASSPATH=<absolute path of>/proxy.jar;<absolute path of>\soap.jar;<absolute path of>\Http_client.jar

Note: If you use an integrated development environment such as Oracle JDeveloper or Eclipse, then set the Java classpath using the user interface for that environment

1.13 What is a typical flow of events for accessing Discoverer Web Services API to return results?

The Discoverer Web Services API can be used by a client application to obtain XML data related to Discoverer connections and worksheets. A typical flow of events is suggested in the following flow (for more information, see "Typical flow of events: Detailed task examples"):

Typical flow of events

"Provide the credentials to invoke Discoverer Web Services"

"Use the identifier to invoke login()"

This starts a user session and provides a valid session key.

Note:

Oracle E-Business Suite users must use the AppConnect() API to generate the session key. For more information, see "Secure Access to Discoverer Web Services for Oracle E-Business Suite Users".

"Inspect the connection information by invoking getConnectionList()"

This returns a list of connections for clients to use for display and selection.

"Select a particular connection and invoke getFolderEntryList()"

This returns a list of workbooks for user display and selection.

In case of OLAP connections there can be folders along with workbooks.

"Select a particular worksheet by invoking getWorksheetList()"

This returns just a list of worksheets with empty parameter information.

"Get the layout of the worksheet by invoking getLayoutMetadata()"

"Select the parameter metadata for a worksheet by invoking getParameterMetadata()"

"Select a worksheet parameter and obtain its LOVs by invoking getParameterValueList()"

This returns the LOV data in chunks which is used by clients for user display and selection.

Alternatively, you can select worksheet parameters in the cascading style by invoking the getCascadeParameterValueList(). For more information see "Select worksheet parameters and obtain LOVs in the cascading style by invoking getCascadeParameterValueList()".

Note: If the worksheet does not contain parameters, then the client should not invoke getParameterValueList() or getCascadeParameterValueList().

"Submit a worksheet query (including parameters) by invoking submitWorksheetQuery()"

The client performs a submit, passing parameters if required.

A queryKey is obtained when a worksheet query request is submitted.

"Check the status of the query by invoking getQueryStatus()"

This returns the current status of the query for user display and selection.

"View worksheet data on completion of the query by invoking getWorksheetData()"

"Log out, by invoking Logout()"

Note: Queries must be executed sequentially, so that when the client application performs a single login call for a user, it must ensure that the query submission for a worksheet is made only after the previous query submission has yielded results.

Note: For OLAP worksheets, the XML can contain aggregate totals. In that case, if the API client creates a total for an OLAP worksheet with Aggregate totals, it would yield wrong results.

1.14 Typical flow of events: Detailed task examples

The following flow of events shows some typical Java class entries for each task example.

1.14.1 Provide the credentials to invoke Discoverer Web Services

The following code must be executed before you can successfully perform a login() API call.

     wsi_Service = new Wsi_Service();
     Wsi proxy = wsi_Service.getWsi();
     Map requestContext = ((BindingProvider)proxy).getRequestContext();
     requestContext.put(BindingProvider.USERNAME_PROPERTY,"weblogic");
     requestContext.put(BindingProvider.PASSWORD_PROPERTY,"weblogic");
     requestContext.put(BindingProvider.ENDPOINT_ADDRESS_PROPERTY,testEndpoint);
     requestContext.put(BindingProvider.SESSION_MAINTAIN_PROPERTY,true);

1.14.2 Use the identifier to invoke login()

You must provide the user credentials to invoke the Discoverer Web Services before you can use the login() call. For more information, see "Provide the credentials to invoke Discoverer Web Services".

Note: The login() call must be invoked before invoking any other Discoverer Web Services.

      DisplayName displayname = new DisplayName();
      displayname.setUser("DISPLAYNAME");
      Identifier idfr = new Identifier() ;
      idfr.setId("IDENTIFIER");

      UserCredential uc = new UserCredential();
      uc.setDisplayName(displayname);
      uc.setIdentifier(idfr);

      LocaleBean locale = new LocaleBean();
      locale.setCountry("US");
      locale.setLanguage("en");
      locale.setVariant("");

      System.out.println("Invoke the login() WS API");
      SessionKey sKey = proxy.login(uc, locale);
      System.out.println("Session Key :"+sKey.getKey());

Note: To access SSO-based connections, you can provide the GUID and SSOUsername as the Identifier and DisplayName respectively.

1.14.3 Secure Access to Discoverer Web Services for Oracle E-Business Suite Users

Instead of using the login() API, Oracle E-Business Suite users can provide the secure ticket and connection details using the AppsConnect() API and access Discoverer Worksheets.

Notes:

Oracle E-Business Suite users cannot use Single Sign-On (SSO) or Oracle Access Manager (OAM) authentication. For more information about how to enable and disable SSO or OAM for Discoverer, see Oracle Fusion Middleware Configuration Guide for Oracle Business Intelligence Discoverer.

The AppsConnect() call must be invoked before invoking any other Discoverer Web Services.

      LocaleBean locale = new LocaleBean();
      locale.setCountry("US");
      locale.setLanguage("en");
      locale.setVariant("");

      public SessionKey AppsConnect
        (
          Ticket ticket,
          ConnectString connectStr,
          DiscoEulName eul,
          LocaleBean aLocale
        )
         throws DiscovererWSException, DiscovererSessionUnavailableException

      System.out.println("Invoke the AppsConnect() WS API");
      SessionKey sKey = AppsConnect(ticket,ConnectStr,eul,locale);
      System.out.println("Session Key :"+sKey.getKey());

In the AppsConnect() API, Ticket, ConnectString, and DiscoEulName are string wrapper objects. Values for these objects can be retrieved from the Discoverer URL that Discoverer users use to start Discoverer.

A sample Discoverer Viewer URL is given below:

http://hostname.domain/discoverer/viewer?Connect=[APPS_SECURE]discor11&SessionCookieName=discor11&eul=EUL_US&opendbid=HRIPWCMP&FrameDisplayStyle=separate&acf=453560870&NLS_LANG=AMERICAN_AMERICA&NLS_DATE_FORMAT=DD-MON-RRRR&NLS_NUMERIC_CHARACTERS=.,&NLS_DATE_LANGUAGE=AMERICAN&NLS_SORT=BINARY&exitURL=http://hostname.domain/OA_HTML/OA.jsp?OAFunc=OAHOMEPAGE

The value of the SessionCookieName parameter is the ticket key for the cookie.

The value of the Connect parameter is the value that you pass for the ConnectString object. In the above URL, it is [APPS_SECURE]discor11.

The value of the eul parameter is the value that you pass for the DiscoEulName object. In the above URL, it is EUL_US.

The locale details can either be defined using the LocaleBean object or retrieved from the URL.

The acf parameter identifies the user/responsibility/security group. Any change in this parameter results in a new Discoverer session.

1.14.4 Inspect the connection information by invoking getConnectionList()

Once logged in, the user can invoke the getConnectionList() API to obtain a list of available connections as shown below:

   System.out.println("Invoke the getConnectionList() API");
   ConnectionList cl = proxy.getConnectionList(sKey);
   List conns = cl.getConnections();
   System.out.println("Discoverer connections:");
   for(int i=0; i<conns.size(); i++)
   {
    System.out.println("Name:"+conns.get(i).getConnectionName().getName());
    System.out.println(" Key:"+ conns.get(i).getConnectionKey().getKey());
    System.out.println(" Desc:"+ conns.get(i).getConnectionDesc().getDesc());
   }

1.14.5 Select a particular connection and invoke getFolderEntryList()

Before you can use the getFolderEntryList() API, you must provide credentials to invoke the Discoverer Web Services, and have a valid session key (by performing a login() call). For more information, see "Provide the credentials to invoke Discoverer Web Services", and "Use the identifier to invoke login()".

Note:

Oracle E-Business Suite users must use the AppsConnect() API to generate the session key. After connecting to Discoverer using AppsConnect(), for invoking the getFolderEntryList() API, you can pass a NULL value for the ConnectionKey.

ConnectionKey cKey = new ConnectionKey();
cKey.setKey("CONNECTIONKEY");
FolderEntryPath fPath = new FolderEntryPath();
fPath.setPath("");

System.out.println("Invoke the getFolderEntryList() API");
FolderEntryList fList = proxy.getFolderEntryList(sKey, cKey, fPath);
List fEntries = fList.getFolderEntries();
for(int i=0; i<fEntries.size(); i++)
 {
       System.out.println("Name:"+ fEntries.get(i).getName().getName());
       System.out.println(" Path:"+ fEntries.get(i).getPath().getPath());
       System.out.println("    Desc:"+fEntries.get(i).getDesc().getDesc());
       System.out.println("       Type:"+ fEntries.get(i).getType().getType());
 }

Notes:

The folder path is an empty string for relational database connections. For OLAP connections you can specify the complete folder name.

For a relational database connection, the Type is always "Workbook". In case of an OLAP connection, you can see "Folder" as Type.

1.14.6 Select a particular worksheet by invoking getWorksheetList()

You can use the getWorksheetList() API to get a list of worksheets for a given workbook.

Note:

Oracle E-Business Suite users do not require to create a ConnectionKey as they connect to Discoverer using the AppsConnect() API. After connecting to Discoverer, for invoking the getWorksheetList() API, the ConnectionKey associated with the workbook can be passed as NULL or an empty string.

WorkbookKey wbKey = new WorkbookKey();
wbKey.setConnKey(cKey);
wbKey.setKey("ANALYTIC_FUNCTION_EXAMPLES");

System.out.println("Invoke the getWorksheetList() API");
WorksheetList wsList = proxy.getWorksheetList(sKey, wbKey);
List wsheets = wsList.getWorksheets();
      for(int i=0; i<wsheets.size(); i++)
      {
        System.out.println("Name:" +wsheets.get(i).getName().getName());
        System.out.println("    Key:"+wsheets.get(i).getKey().getKey());
      }

The Key that you obtained from the above call can be used as the worksheet key for the subsequent web service calls.

1.14.7 Get the layout of the worksheet by invoking getLayoutMetadata()

This API provides information about the dimensions of a Discoverer worksheet.

WorksheetKey wsKey = new WorksheetKey();
wsKey.setWbKey(wbKey);
wsKey.setKey("ANALYTIC_FUNCTION_EXAMPLES/1817");

System.out.println("Invoke the getLayoutMetadata() API");
Layout layout = proxy.getLayoutMetadata(sKey, wsKey);
List dimensions = layout.getDimensions();
List measures = layout.getMeasures();
      for(int i=0; i< dimensions.size(); i++)
         {
           System.out.println("Dimension :"+dimensions.get(i).getName());
         }
      for(int i=0; i<measures.size(); i++)
          {
            System.out.println("Measure :"+measures.get(i).getName());
          }

1.14.8 Select the parameter metadata for a worksheet by invoking getParameterMetadata()

Use this API to check whether any parameter metadata is available for the worksheet.

System.out.println("Invoke the getParameterMetaData() API");
ParameterList pList = proxy.getParameterMetadata(sKey, wsKey);
List parameters = pList.getParameters();
     for(int i=0; i< parameters.size(); i++)
      {
        System.out.println("Name:"+ parameters.get(i).getName().getName());
        System.out.println("  Key:"+parameters.get(i).getKey().getKey());
      }

This API returns an empty list if the worksheet does not contain any parameter.

1.14.9 Select a worksheet parameter and obtain its LOVs by invoking getParameterValueList()

The parameters for this API are sessionKey, parameterKey, and an integer.

ParameterKey pKey = new ParameterKey();
pKey.setKey("ANALYTIC_FUNCTION_EXAMPLES/1817/36211");
pKey.setWsKey( wsKey);
ParameterValueList pvList = proxy.getParameterValueList(sKey,pKey,new Integer(50));
List pvs = pvList.getParamValues();
System.out.println("Invoke the getParameterValueList() API");
System.out.println("Parameter Lovs:");
for(int i=0; i< pvs.size(); i++)
{
System.out.println("Val :"+pvs.get(i).getValue()); // Lov
System.out.println(" DescriptorKey :"+pvs.get(i).getDescriptorKey());
//paramter descriptor key. This is valid if the parameter is an indexed type;
}

1.14.10 Select worksheet parameters and obtain LOVs in the cascading style by invoking getCascadeParameterValueList()

The parameters for this API are sessionKey, parameterKey, an integer, and ParameterSelectList.

// Code to retrieve cities from the region 'west'.
// To build the ParameterSelectList with the region as "west"

ParameterValue[] pval_region = new ParameterValue[1];
pval_region[0] = new ParameterValue();
pval_region[0].setValue("West");
pval_region[0].setDescriptorKey(null);

ParameterSelect[] pselect_region = new ParameterSelect[1];
pselect_region[0] = new ParameterSelect();
pselect_region[0].setKey(pKey_region);
ArrayList<ParameterValue> pval_regionlist = new ArrayList<ParameterValue>();
pval_regionlist.add(pval_region[0]);
pselect_region[0].getValues().addAll(pval_regionlist);

ParameterSelectList pselectList= new ParameterSelectList();
ArrayList<ParameterSelect> pSelectArraylist = new ArrayList<ParameterSelect>();
pSelectArraylist.add(pselect_region[0]);
pselectList.getSelParams().addAll(pSelectArraylist);

// To get the values for the city parameter
ParameterKey pKey_city = new ParameterKey();
pKey_city.setKey("XMLP_PARAMETERSCASCADE/1/10");
pKey_city.setWsKey(wsKey);

do
{

    pvList = proxy.getCascadeParameterValueList(sKey,pKey_city,new Integer(10),pselectList);
    pvs= pvList.getParamValues();
    System.out.println("Invoke the getParameterValueList() API");
    System.out.println("Parameter Lovs: "+pvs.size());
    for(int i=0; i< pvs.size(); i++)
    {
      System.out.println("Val :"+pvs.get(i).getValue()); // Lov
      System.out.println("    DescriptorKey :"+pvs.get(i).getDescriptorKey());
    }
}while (pvs.size()>0 );

1.14.11 Submit a worksheet query (including parameters) by invoking submitWorksheetQuery()

The parameters for this API are sessionKey, workSheetKey, ParameterSelectList and QueryOption.

ParameterSelectList helps you to pass a list of selected parameters. The code below is for multiple parameters and multiple vales for each parameter.

   ParameterValue[] pval = new ParameterValue[1];
   pval[0] = new ParameterValue();
   pval[0].setValue("Aladdin");
   pval[0].setDescriptorKey(null);
   pval[1] = new ParameterValue();
   pval[1].setValue("A Few Good Men");
   pval[1].setDescriptorKey(null);

   ParameterSelect[] pselect = new ParameterSelect[1];
   pselect[0] = new ParameterSelect();
   pselect[0].setKey(pKey);
   ArrayList pvallist = new ArrayList();
   pvallist.add(pval[0]);
   pvallist.add(pval[1]);
   pselect[0].getValues().addAll(pvallist);
   ParameterSelectList pselectList = new ParameterSelectList();
   ArrayList pselectlist = new ArrayList();
   pselectlist.add(pselect[0]);
   pselectList.getSelParams().addAll(pselectlist);

The QueryOption helps you to control the properties of the result set. The supported result types are XMLROWSET, PDF, HTML, and XLS. For the XMLROWSET type, you can specify the number of rows per fetch.

From the QueryOptions that you specify, the applicable options are considered; the others are discarded.

    ResultType rt = new ResultType();
    rt.setType("XMLROWSET");

    QueryOption qo = new QueryOption();
                qo.setChunkSize(1021);
    qo.setNoOfrows(25);
    qo.setResultType(rt);
    qo.setUserCredential(uc);

The code below submits the query.

    QueryKey qKey = proxy.submitWorksheetQuery(sKey, wsKey,pselectList,qo);
    System.out.println("Query Key :" + qKey.getKey());

1.14.12 Check the status of the query by invoking getQueryStatus()

       String status="";
       String resultsReady = "Results Ready";
       String cancelled = "Cancelled";
       QueryStatus qs = null;
       while(!status.equalsIgnoreCase(resultsReady) &&
       !status.equalsIgnoreCase(cancelled))
       { qs = proxy.getQueryStatus(sKey, qKey);
         status = qs.getStatus();
         System.out.println("Status :"+qs.getStatus());
         Thread.sleep(5);
       }

1.14.13 View worksheet data on completion of the query by invoking getWorksheetData()

Once you get the query status as Ready, you can get the worksheet data using the getWorksheetData() API. The code below shows how to get the worksheet data for XMLROWSET result type.

          if(qs!= null && qs.getStatus().equalsIgnoreCase(resultsReady))
        {
        System.out.println("Invoking getWorksheetData() API");
       QueryResult qr = null;
        do
        {
          qr = proxy.getWorksheetData(sKey, qKey,false);
          String data = qr.getData();
                if (qo.getResultType().getType().matches("XMLROWSET") )
                {
            System.out.println("------------Data block begin------------");
             System.out.println(data);
            System.out.println("------------Data block end------------");
                }
          }while(qr.isFinished()== false);
          }

The following code sample explains how to get the worksheet data for a binary data type (for example, XLS).

          if(qs!= null && qs.getStatus().equalsIgnoreCase(resultsReady))
        {
                System.out.println("Invoking getWorksheetData() API");
          QueryResult qr = null;
                do
           {
              qr = proxy.getWorksheetData(sKey, qKey,false);
              String data = qr.getData();
              if(qo.getResultType().getType().matches("XLS") )
              {
                 String opFilename = "/tmp/out.xls" ;
                        else if
                        Base64Decoder myBase64Decoder = new Base64Decoder();
                 byte _myTempByteArray [] = null;
                 FileOutputStream fout = null;
                 String opFilename = "/tmp/out.xls" ;
                 try
                 {
                  fout =new FileOutputStream(opFilename);
                 }
                 catch(FileNotFoundException e)
                 {
                   System.out.println("Error Opening Output File");
                   return;
                 }
                 _myTempByteArray = myBase64Decoder.decode(data);
         fout.write(_myTempByteArray);
         }
        }while(qr.isFinished()== false);
        }

1.14.14 Log out, by invoking Logout()

proxy.logout(sKey);

1.15 Example of a Java class that invokes Discoverer Web Services

The following text is an example of a Java class (wsiClient.java) that might invoke Discoverer Web Services:

import java.io.FileNotFoundException;
import java.io.FileOutputStream;

import java.util.List;
import java.util.Map;

import javax.xml.ws.BindingProvider;
import javax.xml.ws.WebServiceRef;

import jaxwstest.proxy.Wsi;
import jaxwstest.proxy.Wsi_Service;
import jaxwstest.proxy.types.ConnectionKey;
import jaxwstest.proxy.types.ConnectionList;
import jaxwstest.proxy.types.DisplayName;
import jaxwstest.proxy.types.FolderEntry;
import jaxwstest.proxy.types.FolderEntryList;
import jaxwstest.proxy.types.FolderEntryPath;
import jaxwstest.proxy.types.Identifier;
import jaxwstest.proxy.types.LocaleBean;
import jaxwstest.proxy.types.QueryKey;
import jaxwstest.proxy.types.QueryOption;
import jaxwstest.proxy.types.QueryResult;
import jaxwstest.proxy.types.QueryStatus;
import jaxwstest.proxy.types.ResultType;
import jaxwstest.proxy.types.SessionKey;
import jaxwstest.proxy.types.UserCredential;
import jaxwstest.proxy.types.WorkbookKey;
import jaxwstest.proxy.types.Worksheet;
import jaxwstest.proxy.types.WorksheetKey;
import jaxwstest.proxy.types.WorksheetList;

import oracle.net.www.Base64Decoder;

public class wsiClient
{
  @WebServiceRef
  private static Wsi_Service wsi_Service;
  public static void main(String[] args)
  {

    try
    {
      // Create a new stub
      wsi_Service = new Wsi_Service();
      wsiProxy proxy = new wsiProxy();

      Map requestContext = ((BindingProvider)proxy).getRequestContext();
      requestContext.put(BindingProvider.USERNAME_PROPERTY,"weblogic");
      requestContext.put(BindingProvider.PASSWORD_PROPERTY,"weblogic");
      requestContext.put(BindingProvider.ENDPOINT_ADDRESS_PROPERTY,testEndpoint);
      requestContext.put(BindingProvider.SESSION_MAINTAIN_PROPERTY,true);
      // Add your code to call the desired methods

      String version = proxy.getVersion();
      System.out.println("Version ="+version );

      DisplayName ssouser = new DisplayName();
      ssouser.setUser("SSOUSER1");
      Identifier  idfr = new Identifier();
      idfr.setId("IDENTIFIER");

      UserCredential uc = new UserCredential();
      uc.setDisplayName(ssouser);
      uc.setIdentifier(idfr);
      LocaleBean locale = new LocaleBean();
      locale.setCountry("US");
      locale.setLanguage("en");
      locale.setVariant("");

      System.out.println("Invoke the login() WS API");
      SessionKey sKey = proxy.login(uc, locale);
      System.out.println("Session Key :"+sKey.getKey());

      System.out.println("-----------------------------------------------");
      // Get the list of connections accessible to this SSOUser
      System.out.println("Invoke the getConnectionList() API");
      ConnectionList cl = proxy.getConnectionList(sKey);
      List conns = cl.getConnections();
      System.out.println("Discoverer connections:");
      for(int i=0; i<conns.size(); i++)
      {
      System.out.println("Name:"+conns.get(i).getConnectionName().getName());
      System.out.println(" Key:"+ conns.get(i).getConnectionKey().getKey());
      System.out.println(" Desc:"+ conns.get(i).getConnectionDesc().getDesc());
      }
      System.out.println("-----------------------------------------------");

      System.out.println("Invoke the getFolderEntryList() API");
// Create a valid connectionKey object using one of the connection keys obtained
 in the getConnectionList
      ConnectionKey cKey = new ConnectionKey();
      cKey.setKey("CONNECTIONKEY");
      FolderEntryPath fPath = new FolderEntryPath();
      fPath.setPath("");

      System.out.println("Invoke the getFolderEntryList() API");
      FolderEntryList fList = proxy.getFolderEntryList(sKey, cKey, fPath);
      List fEntries = fList.getFolderEntries();
      for(int i=0; i<fEntries.size(); i++)
      {
       System.out.println("Name:"+ fEntries.get(i).getName().getName());
       System.out.println("   Path:"+ fEntries.get(i).getPath().getPath());
       System.out.println("   Desc:"+fEntries.get(i).getDesc().getDesc());
       System.out.println("   Type:"+ fEntries.get(i).getType().getType());
       }
       System.out.println("-----------------------------------------------");

      WorkbookKey wbKey = new WorkbookKey();
      wbKey.setConnKey(cKey);
      wbKey.setKey("ANALYTIC_FUNCTION_EXAMPLES");

      System.out.println("Invoke the getWorksheetList() API");
      WorksheetList wsList = proxy.getWorksheetList(sKey, wbKey);
      List wsheets = wsList.getWorksheets();
      for(int i=0; i<wsheets.size(); i++)
      {
        System.out.println("Name:" +wsheets.get(i).getName().getName());
        System.out.println("    Key:"+wsheets.get(i).getKey().getKey());
      }
      System.out.println("-----------------------------------------------");

      WorksheetKey wsKey = new WorksheetKey();
      wsKey.setWbKey(wbKey);
      wsKey.setKey("ANALYTIC_FUNCTION_EXAMPLES/1817");

      System.out.println("Invoke the getLayoutMetadata() API");
      Layout layout = proxy.getLayoutMetadata(sKey, wsKey);
      List dimensions = layout.getDimensions();
      List measures = layout.getMeasures();
      for(int i=0; i< dimensions.size(); i++)
         {
           System.out.println("Dimension :"+dimensions.get(i).getName());
         }
      for(int i=0; i<measures.size(); i++)
          {
            System.out.println("Measure :"+measures.get(i).getName());
          }

System.out.println("-----------------------------------------------");

System.out.println("Invoke the getParameterMetaData() API");
ParameterList pList = proxy.getParameterMetadata(sKey, wsKey);
List parameters = pList.getParameters();
for(int i=0; i< parameters.size(); i++)
 {
   System.out.println("Name:"+ parameters.get(i).getName().getName());
   System.out.println("  Key:"+parameters.get(i).getKey().getKey());
 }
System.out.println("-----------------------------------------------");

ParameterKey pKey = new ParameterKey();
pKey.setKey("ANALYTIC_FUNCTION_EXAMPLES/1817/36211");
pKey.setWsKey( wsKey);

ParameterValueList pvList = proxy.getParameterValueList(sKey,pKey,new Integer(50));
List pvs = pvList.getParamValues();
System.out.println("Invoke the getParameterValueList() API");
System.out.println("Parameter Lovs:");
for(int i=0; i< pvs.size(); i++)
{
System.out.println("Val :"+pvs.get(i).getValue()); // Lov
System.out.println(" DescriptorKey :"+pvs.get(i).getDescriptorKey());
//paramter descriptor key. This is valid if the parameter is an indexed type;
}

   ParameterValue[] pval = new ParameterValue[1];
   pval[0] = new ParameterValue();
   pval[0].setValue("Aladdin");
   pval[0].setDescriptorKey(null);
   pval[1] = new ParameterValue();
   pval[1].setValue("A Few Good Men");
   pval[1].setDescriptorKey(null);

   ParameterSelect[] pselect = new ParameterSelect[1];
   pselect[0] = new ParameterSelect();
   pselect[0].setKey(pKey);
   ArrayList pvallist = new ArrayList();
   pvallist.add(pval[0]);
   pvallist.add(pval[1]);
   pselect[0].getValues().addAll(pvallist);
   ParameterSelectList pselectList = new ParameterSelectList();
   ArrayList pselectlist = new ArrayList();
   pselectlist.add(pselect[0]);
   pselectList.getSelParams().addAll(pselectlist);

    ResultType rt = new ResultType();
    rt.setType("XMLROWSET");

    QueryOption qo = new QueryOption();
                qo.setChunkSize(1021);
    qo.setNoOfrows(25);
    qo.setResultType(rt);
    qo.setUserCredential(uc);

    QueryKey qKey = proxy.submitWorksheetQuery(sKey, wsKey,pselectList,qo);
    System.out.println("Query Key :" + qKey.getKey());

       String status="";
       String resultsReady = "Results Ready";
       String cancelled = "Cancelled";
       QueryStatus qs = null;
       while(!status.equalsIgnoreCase(resultsReady) &&
       !status.equalsIgnoreCase(cancelled))
       {
         qs = proxy.getQueryStatus(sKey, qKey);
         status = qs.getStatus();
         System.out.println("Status :"+qs.getStatus());
         Thread.sleep(5);
       }
        if(qs!= null && qs.getStatus().equalsIgnoreCase(resultsReady))
        {
        System.out.println("Invoking getWorksheetData() API");
       QueryResult qr = null;
        do
        {
          qr = proxy.getWorksheetData(sKey, qKey,false);
          String data = qr.getData();
                if (qo.getResultType().getType().matches("XMLROWSET") )
                {
            System.out.println("------------Data block begin------------");
             System.out.println(data);
            System.out.println("------------Data block end------------");
                }
          }while(qr.isFinished()== false);
          }
      proxy.logout(sKey);
      }
      catch(Exception ex){
      ex.printStackTrace();
      }
    }
  }

2 Discoverer Web Services API Reference

This chapter provides detailed reference information for the following Discoverer Web Services API.

"AppsConnect"

"getConnectionList"

"getFolderEntryList"

"getLayoutMetaData"

"getParameterMetaData"

"getParameterValueList"

"getCascadeParameterValueList"

"getQueryStatus"

"getVersion"

"getViewerURL"

"getWorksheetData"

"getWorkSheetList"

"isSessionValid"

"login"

"logout"

"requestQueryCancel"

"submitWorksheetQuery"

2.1 AppsConnect

This API is used to establish a secure connection to Discoverer Web Services for Oracle E-Business Suite (EBS) users.

This API call accepts the APP_SECURE ticket, Connection string, name of the EUL, and LocaleBean information and returns a unique SessionKey, which is then passed to all other API calls.

API
Details

Method

Public SessionKey AppsConnect(ticket,ConnectStr,eul,locale) { }

Input:

ticket

This object must contain a valid APP_SECURE ticket for the Discoverer application.

ConnectStr

This object passes the connection details to connect to Discoverer.

eul

Specifies the name of the database schema which contains the EUL that the user want to connect to.

locale

This object passes locale information to the webservice session. By default the Locale is English (en-US).

Output

SessionKey

Exceptions

DiscovererWSException

DiscovererSessionUnavailableException

The following table lists the fields of the structures.

Structure
Fields

Ticket

String ticket_name

ConnectString

String name

DiscoEulName

String eulname

LocaleBean

String language

String country

String variant

2.2 getConnectionList

This API call obtains a list of connections. It accepts SessionKey and returns the Connection list object. In single sign-on mode the list of public connections and private connections is returned. The connection can be of type Relational, OLAP, or APPS.

API
Details

Method

Public ConnectionList getConnectionList(SessionKey aSessionKey) { }

Input:

SessionKey

Output

ConnectionList

Exceptions

java.rmi.RemoteException

The following table lists the fields of the structures.

Structure
Fields

ConnectionList

Array of Connection objects

Connection

ConnectionName

ConnectionKey

ConnectionDescription

ConnectionEUL

ConnectionDBIdentifier

ConnectionAccessType

ConnectionName

String name

ConnectionKey

String key

ConnectionDescription

String description

ConnectionEUL

String eulname

ConnectionDBIdentifier

String database name

ConnectionAccessType

String accesstype

2.3 getFolderEntryList

This API call uses a connection to obtain the list of non-scheduled workbooks and FolderEntries. It accepts SessionKey, ConnectionKey, and FolderEntrypath and provides a list of non-scheduled workbooks and FolderEntries data that is accessible from the connection for the FolderEntrypath. The list of non-scheduled workbooks includes all of the shared workbooks for the database user that was used in the connection.

When the connection is to relational data, workbooks are stored in a single level in the EUL. The only valid value for FolderEntrypath is “”. An empty string specifies the root folder entry in both Discoverer Plus Relational and Discoverer Plus OLAP.

When the connection is to OLAP data, FolderEntries and Workbooks are stored in the Discoverer Catalog. There can be multiple levels of FolderEntries, which can be queried by providing the appropriate FolderEntryPath. Clients must make successive calls to this method to browse FolderEntries.

API
Details

Method

Public FolderEntryList getFolderEntryList(SessionKey aSessionKey,
 ConnectionKey aCkey, FolderEntrypath fpath ) { }

Input:

SessionKey

ConnectionKey

FolderEntryPath

Path under which Workbooks and FolderEntries are required.

Output

FolderEntryList object

Exceptions

java.rmi.RemoteException

The following table lists the fields of the structures.

Structure
Fields

FolderEntryList

Array of FolderEntry objects

String country

String variant

FolderEntry

FolderEntryName

FolderEntrypath

Fully qualified path to either the FolderEntry or the WorkbookEntry.

FolderEntryType

FolderEntryDescription

FolderEntryName

String name

FolderEntryPath

String path

FolderEntryDescription

String description

FolderEntryType

String type

Either FolderEntry or WorkbookEntry.

WorkbookKey

Valid if the type is WorkbookEntry.

WorkbookKey

String wbDevKey

ConnectionKey

2.4 getLayoutMetaData

This API call obtains the layout metadata for a selected worksheet. It accepts SessionKey and WorksheetKey, and it provides the Layout information for the worksheet that is identified by WorksheetKey.

API
Details

Method

Public Layout getLayoutMetaData(SessionKey aSessionKey,
 WorksheetKey  aWorksheetKey ) {}

Input:

SessionKey

WorksheetKey

Output

Layout

Exceptions

java.rmi.RemoteException

The following table lists the fields of the structures.

Structure
Fields

Layout

Array of Dimension objects

Array of Measure objects

Dimension

String label

Measure

String label

2.5 getParameterMetaData

This API call obtains the parameter metadata for a selected worksheet. It accepts SessionKey and WorksheetKey and provides the list of parameters for the specified worksheet that is identified by WorksheetKey

API
Details

Method

Public ParameterList getParameterMetaData(SessionKey aSessionKey,
 WorksheetKey  aWorksheetKey ) {}

Input:

SessionKey

WorksheetKey

Output

ParameterList

Exceptions

java.rmi.RemoteException

The following table lists the fields of the structures.

Structure
Fields

ParameterList

Array of Parameter objects.

2.6 getParameterValueList

This API call obtains the parameter LOVs using a ParameterKey. It accepts SessionKey, ParameterKey, and numValues and provides the list of values (LOVs). You call this method for parameters that have LOVs. The LOVs are retrieved in chunks (the size is specified by numValues), and you can page through from start to finish in one direction only; there is no bi-directional paging support of parameters. The client application is responsible for caching the parameters.

API
Details

Method

Public ParameterValueList getParameterValueList(SessionKey
 aSessionKey, ParameterKey aParamKey, int numValues){ }

Input:

SessionKey

ParameterKey

numValues

An integer value that specifies the number of values that the web service should return in one call. If there are more values getParameterValueList should be called repeatedly.

Output

ParameterValueList

Exceptions

java.rmi.RemoteException

Notes

Parameter linking is inactive.

The following table lists the fields of the structures.

Structure
Fields

ParameterValueList

Array of ParameterValue Objects

Boolean finished

2.7 getCascadeParameterValueList

This API call obtains the parameter LOVs using a ParameterKey and ParameterSelectList. It accepts SessionKey, ParameterKey, numValues, and ParameterSelectList and provides the list of values (LOVs) in the cascading style. In cascading parameters, the LOVs of one parameter depends on the value selected for the preceding parameter in the worksheet. The LOVs are retrieved in chunks (the size is specified by numValues), and you can page through from start to finish in one direction only; there is no bi-directional paging support of parameters. The client application is responsible for caching the parameters.

API
Details

Method

Public ParameterValueList getCascadeParameterValueList(SessionKey
 aSessionKey, ParameterKey aParamKey, int numValues, ParameterSelectList pselectList){ }

Input:

SessionKey

ParameterKey

numValues

An integer value that specifies the number of values that the web service should return in one call. If there are more values getCascadeParameterValueList should be called repeatedly.

ParameterSelectList

Output
ParameterValueList

Exceptions

DiscovererWSException

DiscovererSessionUnavailableException

DiscovererSessionCreationFailedException

The following table lists the fields of the structures.

Structure
Fields

ParameterValueList

Array of ParameterValue Objects

Boolean finished

2.8 getQueryStatus

This API call returns the status of the query, such as executing or canceled. It accepts SessionKey and QueryKey.

API
Details

Method

Public QueryStatus getQueryStatus(SessionKey aSessionKey,
 QueryKey aQueryKey){ }

Input:

SessionKey

QueryKey

Output

QueryStatus

Exceptions

java.rmi.RemoteException

The following table lists the fields of the structures.

Structure
Fields

QueryStatus

String detail

String status

Status is one of the following:

QUERY_FAILED

QUERY_EXECUTING

QUERY_CANCELED

QUERY_RESULTS_READY

QUERY_NEEDS_EXECUTING

QUERY_NOT_DEFINED

QUERY_SCHEDULED

QUERY_VALIDATING

2.9 getVersion

This API call provides the web service component version. Any change in the web service interface or API causes the version number to change. Use the version number to assist you in determining the functionality that is available for the web service.

API
Details

Method

Public String getVersion( ) { }

Input:

Void

Output

String

A version of 1.0 implies support for integration with Oracle BI Publisher.

A version of 2.0 implies support for integration with Oracle BI Publisher and interoperability with Oracle BI Enterprise Edition.

Exceptions

None

2.10 getViewerURL

This API call provides the URL of the Discoverer Viewer instance that is hosted on the same machine as the web service. This URL can be used by clients to launch Discoverer Viewer from within their application.

API
Details

Method

Public String getViewerURL(SessionKey aSessionKey,
 WorksheetKey aWorksheetkey, List aParameteSelectList){ }

Input:

SessionKey

WorksheetKey

Java.util.List of ParameterSelect

Output

String

URL to launch Discoverer Viewer.

Exceptions

java.rmi.RemoteException

2.11 getWorksheetData

This API call accepts SessionKey and QueryKey and provides the worksheet data in the format type that is specified in QueryOption in the submitWorksheetQuery method. If the result set is large and is Rowset XML, then by default, 25 rows of data are returned. For other format types, 1MB of data is returned. You can page through the remaining data by calling this method repeatedly. If the finished flag in QueryResults is false , then call the method again to continue paging through the data. You can page through from start to finish in one direction only; there is no bi-directional paging support.

API
Details

Method

Public QueryResult getWorksheetData(SessionKey aSessionKey,
 QueryKey aQueryKey){ }

Input:

SessionKey

QueryKey

Output

QueryResult

Exceptions

java.rmi.RemoteException

The following table lists the fields of the structures.

Structure
Fields

QueryResult

String data

Rowset XML, HTML, PDF, XLS data. HTML, PDF, XLS data uses base64 encoding.

Boolean finished

If finished is true, then do not call GetWorksheetData.

The following table describes the export types.

Export type | Relational | OLAP
HTML | HTML file is zipped and base64 encoded before transfer. | HTML file is zipped and base64 encoded before transfer.
PDF | PDF file is base64 encoded before transfer. | PDF file is base64 encoded before transfer.
XLS | XLS file is base64 encoded before transfer. Similar to Discoverer Viewer, graphs are not exported. | XLS file is zipped in base64 encoded before transfer. Graphs are exported.

For HTML, PDF, and XLS export types

If the worksheet does not have page items, then all the data is exported.

If the worksheet has page items, the output is different for OLAP and Relational connections as follows:

For Relational connections:

HTML, PDF, and XLS export types - Returns worksheet data for the page items selected in the worksheet.

For OLAP connections:

XLS export types - Returns worksheet data for all combination of page item values.

HTML or PDF export types - Returns worksheet data for the selected page item.

This export behavior is similar to Viewer with the exception that the "isCurrentPageItemsExportForOLAP" setting in the configuration.xml file is not respected.

Sample Rowset XML structure

<BIData>
 <Query id="1">
   <PAGE>
    <ROWSET>
     <ROW>
      <Dimension L="Time Dimension Values">1996</D>
       < Dimension L="Product Dimension Values">TOTALPROD</D>
       < Dimension L="Geography Dimension Values">WORLD</D>
       < Dimension L="Channel Dimension Values">TOTALCHANNEL</D>
       <Measure L="Dollar Sales">1.18247112042864E8</M>
       <Measure L="Quota">5475441.87541972</M>
     </ROW>
     <ROW>
       < Dimension L="Time Dimension Values">1997</D>
       < Dimension L="Product Dimension Values">TOTALPROD</D>
       < Dimension L="Geography Dimension Values">WORLD</D>
       < Dimension L="Channel Dimension Values">TOTALCHANNEL</D>
       <Measure L="Dollar Sales">4.64121127850704E7</M>
       <Measure L="Quota">2917189.84519184</M>
     </ROW>
    </ROWSET>
   </PAGE>
 </Query>
</BIData>

2.12 getWorkSheetList

This API call accepts SessionKey and WorkbookKey and provides the list of worksheets within a workbook that is specified in WorkbookKey.

API
Details

Method

Public WorksheetList getWorkSheetList(SessionKey aSessionKey, WorkbookKey  aWorkbookKey ) {}

Input:

SessionKey

WorkbookKey

Output

WorksheetList

Exceptions

java.rmi.RemoteException

The following table lists the fields of the structures.

Structure
Fields

WorksheetList

Array of Worksheet objects

Worksheet

WorksheetName

WorksheetKey

Array of Parameter objects.

This is always a zero-sized array.

WorksheetName

String name

WorksheetKey

String wsDevKey

Identifies a worksheet. For Discoverer Plus Relational and Discoverer Plus OLAP, this is a string.

WorkbookKey

2.13 isSessionValid

This API call accepts a SessionKey and returns a Boolean value that indicates whether the specified session is valid.

API
Details

Method

Public boolean isSessionValid( SessionKey sKey ) { }

Input:

SessionKey

Output

true if session is valid, false otherwise

Exceptions

java.rmi.RemoteException

2.14 login

This API call provides a mechanism for user identity propagation between the client application and the Discoverer Web Services. Authentication occurs during every invocation of the Discoverer Web Services. For more information, see "About authentication and authorization".For every login made by a client application, the Discoverer Web Services create a new Discoverer user session and allocate it to the user.This API call accepts UserCredential and LocaleBean information and returns a unique SessionKey, which is then passed to all other API calls. This API call does not create a new HTTP session if a session exists between the client application instance and the Discoverer Web Services.

API
Details

Method

Public SessionKey login(UserCredential aUserCredential, LocaleBean aLocale) { }

Input:

UserCredential

This object must contain a valid login details of a Discoverer user.

LocaleBean

This object passes locale information to the webservice session. By default the Locale is English (en-US).

Output

SessionKey

Exceptions

java.rmi.RemoteException

The following table lists the fields of the structures.

Structure
Fields

LocaleBean

String language

String country

String variant

UserCredential

Identifier anIdentifier

DisplayName aDisplayName

Identifier

String id

DisplayName

String user

SessionKey

String key

Securely generated random alphanumeric sequence.

2.15 logout

This API call informs the Discoverer Web Services API about the completion of the user session. This call frees the dedicated Discoverer session that was associated with the user session and returns the Discoverer session to the session pool.

API
Details

Method

Public void logout(SessionKey aSessionKey ) { }

Input:

SessionKey

Output

Void

Exceptions

java.rmi.RemoteException

2.16 requestQueryCancel

This API call cancels a query request and removes the resources that are associated with that request. Call this method for queries that have been submitted but whose data has not yet been fetched. If the query data has been fetched, then the resources are removed. This asynchronous API call returns immediately.

API
Details

Method

Public Void requestQueryCancel(SessionKey aSessionKey, QueryKey){ }

Input:

SessionKey

Output

Void

Exceptions

java.rmi.RemoteException

2.17 submitWorksheetQuery

This API call submits the query for the specified worksheet for execution. This asynchoronous API call returns immediately, without waiting for the query execution to complete.

API
Details

Method

Public QueryKey submitWorksheetQuery(SessionKey aSessionKey, WorksheetKey aWorksheetkey, List aParameteSelectList, QueryOption aQueryOption){ }

Input:

SessionKey

WorksheetKey

Java.util.List of ParameterSelect

QueryOption

Output

QueryKey

Exceptions

java.rmi.RemoteException

The following table lists the fields of the structures.

Structure
Fields

QueryKey

String queryId

A secure and unique key that is randomly generated.

ParameterSelect

ParameterKey

Array of ParameterValue objects

QueryOption

int NoOfRows

The number of rows to return in Rowset XML. The default is 25.

int NoOfRows

The number of rows to return in Rowset XML. The default is 25.

int chunksize

The size of data chunks in kilobytes for PDF, XLS and HTML formats. The default is 64 KB.

ResultType

UserCredential

The GUIDUsername or SSOUsername of the user for whom the query is run. If no user name is specified, then the query is run for the user who has logged in.

LocaleBean

String type

Valid types are:

XMLROWSET

HTML - base64 encoded content returned in data string

PDF - base64 encoded content returned in data string

XLS - base64 encoded content returned in data string

Index

A  C  D  E  J  O  S  T  W 

A

API calls

getConnectionList (), 2.2

getFolderEntryList (), 2.3

getLayoutMetaData (), 2.4

getParameterMetaData (), 2.5

getParameterValueList (), 2.6, 2.7

getQueryStatus (), 2.8

getVersion (), 2.9

getViewerURL (), 2.10

getWorksheetData (), 2.11

getWorkSheetList (), 2.12

isSessionValid (), 2.13

login (), 2.14

logout (), 2.15

requestQueryCancel (), 2.16

submitWorksheetQuery (), 2.17

authentication and authorization, 1.5, 1.6

availability requirements, 1.9

C

creating web service client stubs, 1.12.4

D

diagnosing problems, 1.11

Discoverer Web Services API

requirements for invoking, 1.12

verifying access to, 1.12.2

E

Endpoint URL, 1.3

error messages, 1.10

J

Java class example that might invoke the Discoverer Web Services, 1.15

O

Oracle BI Discoverer Web Services

about, 1.2

S

sessions

maintaining, 1.7

pool size, 1.8

SOAP endpoint URL, 1.3

SOAP protocol, 1.1

T

typical flow of events

detailed task examples, 1.14

list, 1.13

W

writing client application

using generated web service client stubs, 1.12.6

WSDL format, 1.4

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