oracle.cabo.data.jbo.servlet.io
Class OrdFileUploadManager

java.lang.Object
  |
  +--oracle.cabo.servlet.io.FileUploadManager
        |
        +--oracle.cabo.servlet.io.BaseFileUploadManager
              |
              +--oracle.cabo.data.jbo.servlet.io.OrdFileUploadManager

public class OrdFileUploadManager

extends BaseFileUploadManager

OrdFileUploadManager is initialized during UIX Controller startup and destroyed on UIX Controller shutdown. It is responsible for managing multipart form data upload requests, mapping them to a suitable PageEvent, for later use in an event handler.

OrdFileUploadManager is an interMedia custom implementation of FileUploadManager . It allows users to specify a maximum memory size limit for multipart file upload per one HTTP Post request. For the upload content that exceeds the limit, the content will be stored as a temporary file in a specified directory.

Two servlet init parameters for oracle.cabo.servlet.BajaServlet are used to manage the memory useage:

      <init-param>
         <param-name>oracle.cabo.data.jbo.servlet.ord.HttpMaxMemory</param-name>
         <param-value>102400</param-value>
      </init-param>
      <init-param>
         <param-name>oracle.cabo.data.jbo.servlet.ord.HttpTempDir</param-name>
         <param-value>D:/temp/ord</param-value>
      </init-param>
 

If they are not specified, the default value for oracle.cabo.data.jbo.servlet.ord.HttpMaxMemory is 102400 bytes; the default value for oracle.cabo.data.jbo.servlet.ord.HttpTempDir is java.io.tmpdir system property value.

The parsed items are stored in a Map object with HTML form file field names as keys, and oracle.ord.im.OrdHttpUploadFile instances as values. The Map object is wrapped in a OrdFileUploadForm instance that is registered in BajaContext. When the current Http request ends, the resources used by OrdHttpUploadFile will be released.

Constructor Summary

OrdFileUploadManager()

Method Summary

void	destroy() Provides an opportunity to cleanup the OrdFileUploadManager.
protected java.lang.String	doUploadFile(BajaContext context, Page page, MultipartFormItem item) Handler for uploading a file.
void	init(javax.servlet.ServletConfig config) Initializes the OrdFileUploadManager.

Methods inherited from class oracle.cabo.servlet.io.BaseFileUploadManager

decodeMultipartRequest

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

OrdFileUploadManager

public OrdFileUploadManager()

Method Detail

init

public void init(javax.servlet.ServletConfig config)

Initializes the OrdFileUploadManager. Initializes ord.HttpMaxMemory and ord.HttpTempDir properties.

Overrides:

init in class FileUploadManager

Parameters:

servlet - the servlet instance

config - the servlet configuration

destroy

public void destroy()

Provides an opportunity to cleanup the OrdFileUploadManager.

Overrides:

destroy in class FileUploadManager

doUploadFile

protected java.lang.String doUploadFile(BajaContext context,
                                        Page page,
                                        MultipartFormItem item)
                                 throws java.io.IOException

Description copied from class: BaseFileUploadManager

Handler for uploading a file. Clients should override this method to process the MultipartFormItem. The return value of this function will be added to the PageEvent; if clients need further processing of the item in subsequent handling of the page, they should return a meaningful string after reading the file.

Overrides:

doUploadFile in class BaseFileUploadManager

Following copied from class: oracle.cabo.servlet.io.BaseFileUploadManager

Parameters:

context - the BajaContext for this request

page - the page the file is being uploaded from; this page object has not yet been validated for login or any other handling

item - a MultipartFormItem that can be used to retrieve the file

Returns:

a value that will be inserted into the PageEvent as a substitute for the actual file contents.