Contents

Title and Copyright Information

Preface

• Documentation Accessibility
• Conventions

1 Introduction and Roadmap

• Document Scope and Audience
• Guide to this Document
• Related Documentation
• JDBC Samples and Tutorials
  • Avitek Medical Records Application (MedRec) and Tutorials
  • JDBC Examples in the WebLogic Server Distribution
• New and Changed JDBC Features in This Release

2 Configuring WebLogic JDBC Resources

• Understanding JDBC Resources in WebLogic Server
• Ownership of Configured JDBC Resources
• JDBC Configuration Files
  • JDBC System Modules
  • JDBC Application Modules
  • JDBC Module File Naming Requirements
  • JDBC Modules in Versioned Applications
  • JDBC Schema
• JMX and WLST Access for JDBC Resources
  • JDBC MBeans for System Resources
  • JDBC Management Objects in the Java EE Management Model (JSR-77 Support)
  • Using WLST to Create JDBC System Resources
  • How to Modify and Monitor JDBC Resources
  • Best Practices when Using WLST to Configure JDBC
• Overview of Clustered JDBC

3 Configuring JDBC Data Sources

• Understanding JDBC Data Sources
• Creating a JDBC Data Source
  • General Data Source Options
  • Selecting a JDBC Driver
  • JDBC Data Source Names
  • Binding a Data Source to the JNDI Tree with Multiple Names
• Transaction Options
  • Enabling Support for Global Transactions with a Non-XA JDBC Driver
  • Understanding the Logging Last Resource Transaction Option
    • Advantages to Using the Logging Last Resource Optimization
    • Enabling the Logging Last Resource Transaction Optimization
    • Programming Considerations and Limitations for LLR Data Sources
    • Administrative Considerations and Limitations for LLR Data Sources
  • Understanding the Emulate Two-Phase Commit Transaction Option
    • Limitations and Risks When Emulating Two-Phase Commit Using a Non-XA Driver
• Connection Pool Features
  • Selecting a JDBC Driver
  • Enabling JDBC Driver-Level Features
  • Initializing Database Connections with SQL Code
• Setting Database Security Credentials
  • Types of Data Source Pools
  • Using a User Name/Password
  • Set Client ID On Connection
  • Identity-based Connection Pooling
    • How Heterogeneous Connections are Created
    • Using Identity-based Pooling with Global Transactions
    • Using Identity-based Pooling with LLR
• Tuning Data Source Connection Pool Options
  • Increasing Performance with the Statement Cache
    • Statement Cache Algorithms
    • Statement Cache Size
    • Usage Restrictions for the Statement Cache
  • Connection Testing Options for a Data Source
    • Database Connection Testing Semantics
    • Database Connection Testing Configuration Recommendations
    • Default Test Table Name
  • Enabling Connection Creation Retries
  • Enabling Connection Requests to Wait for a Connection
    • Connection Reserve Timeout
    • Limiting the Number of Waiting Connection Requests
  • Automatically Recovering Leaked Connections
  • Avoiding Server Lockup with the Correct Number of Connections
  • Limiting Statement Processing Time with Statement Timeout
  • Using Pinned-To-Thread Property to Increase Performance
    • Changes to Connection Pool Administration Operations When PinnedToThread is Enabled
    • Additional Database Resource Costs When PinnedToThread is Enabled
• Deploying Data Sources on Servers and Clusters
• Minimizing Server Startup Hang Caused By an Unresponsive Database
• Security for JDBC Data Sources
  • Setting Security Policies for JDBC Resources
  • Security Roles for JDBC MBeans
    • JDBC Domain Configuration MBeans
    • JDBC System Module MBeans
• JDBC Data Source Factories (Deprecated)

4 Configuring JDBC Multi Data Sources

• Multi Data Source Features
  • Removing a Database Node
  • Adding a Database Node
• Creating and Configuring Multi Data Sources
• Choosing the Multi Data Source Algorithm
  • Failover
  • Load Balancing
• Multi Data Source Fail-Over Limitations and Requirements
  • Test Connections on Reserve to Enable Fail-Over
  • No Fail-Over for In-Use Connections
• Multi Data Source Failover Enhancements
  • Connection Request Routing Enhancements When a Data Source Fails
  • Automatic Re-enablement on Recovery of a Failed Data Source within a Multi Data Source
  • Enabling Failover for Busy Data Sources in a Multi Data Source
  • Controlling Multi Data Source Failover with a Callback
    • Callback Handler Requirements
    • Callback Handler Configuration
    • How It Works—Failover
  • Controlling Multi Data Source Failback with a Callback
    • How It Works—Failback
• Deploying JDBC Multi Data Sources on Servers and Clusters

5 Using JDBC Drivers with WebLogic Server

• JDBC Drivers Installed with WebLogic Server
• Setting the Environment for a Type-4 Third-Party JDBC Driver
• Globalization Support for the Oracle 11g Thin Driver
• Using the Oracle Thin Driver in Debug Mode
• Using the Oracle Thin Driver Over SSL

6 Monitoring WebLogic JDBC Resources

• Viewing Run-Time Statistics
  • Data Source Statistics
  • Prepared Statement Cache Statistics
• Collecting Profile Information
  • Profile Types
    • Connection Usage (PROFILE_TYPE_CONN_USAGE_STR)
    • Connection Reservation Wait (PROFILE_TYPE_CONN_RESV_WAIT_STR)
    • Connection Reservation Failed (PROFILE_TYPE_CONN_RESV_FAIL_STR)
    • Connection Leak (PROFILE_TYPE_CONN_LEAK_STR)
    • Connection Last Usage (PROFILE_TYPE_CONN_LAST_USAGE_STR)
    • Connection Multithreaded Usage (PROFILE_TYPE_CONN_MT_USAGE_STR)
    • Statement Cache Entry (PROFILE_TYPE_STMT_CACHE_ENTRY_STR)
    • Statements Usage (PROFILE_TYPE_STMT_USAGE_STR)
  • Accessing Diagnostic Data
  • Callbacks for Monitoring Driver-Level Statistics
• Debugging JDBC Data Sources
  • Enabling Debugging
    • Enable Debugging Using the Command Line
    • Enable Debugging Using the WebLogic Server Administration Console
    • Enable Debugging Using the WebLogic Scripting Tool
    • Changes to the config.xml File
  • JDBC Debugging Scopes
  • Request Dyeing

7 Managing WebLogic JDBC Resources

• Testing Data Sources and Database Connections
• Managing the Statement Cache for a Data Source
  • Clearing the Statement Cache for a Data Source
  • Clearing the Statement Cache for a Single Connection
• Shrinking a Data Source
• Resetting a Data Source
• Suspending a Data Source
• Resuming a Data Source
• Shutting Down a Data Source
• Starting a Data Source
• Managing DBMS Network Failures

A Configuring JDBC Application Modules for Deployment

• Packaging a JDBC Module with an Enterprise Application: Main Steps
• Creating Packaged JDBC Modules
  • Creating a JDBC Data Source Module Using the Administration Console
  • JDBC Packaged Module Requirements
  • JDBC Application Module Limitations
  • Creating a JDBC Data Source Module
  • Creating a JDBC Multi Data Source Module
  • Encrypting Database Passwords in a JDBC Module
    • Deploying JDBC Modules to New Domains
  • Application Scoping for a Packaged JDBC Module
• Referencing a JDBC Module in Java EE Descriptor Files
  • Packaged JDBC Module References in weblogic-application.xml
  • Packaged JDBC Module References in Other Descriptors
• Packaging an Enterprise Application with a JDBC Module
• Deploying an Enterprise Application with a JDBC Module
• Getting a Database Connection from a Packaged JDBC Module

B Using WebLogic Server with Oracle RAC

• Overview of Oracle Real Application Clusters
  • Oracle RAC Scalability with WebLogic Server
  • Oracle RAC Availability with WebLogic Server
  • Oracle RAC Load Balancing with WebLogic Server
  • Oracle RAC Failover with WebLogic Server
• Environment
  • Hardware Requirements
    • WebLogic Server Cluster
    • Oracle RAC Cluster
    • Shared Storage
  • Software Requirements
• Configuration Considerations for Oracle
  • Configuring the Listener Process for Each Oracle RAC Instance
  • Configuring Multi Data Sources When Remote Listeners are Enabled or Disabled
• Configuration Options in WebLogic Server with Oracle RAC
  • Choosing a WebLogic Server Configuration for Use with Oracle RAC
  • Required JDBC Drivers
  • Configuration Considerations for Failover
    • Multi Data Source-Managed Failover and Load Balancing
    • Connect-Time Failover
    • Delays During Failover
    • Failure Handling Walkthrough for Global Transactions
  • Using Multi Data Sources with Oracle RAC
    • Attributes of a Multi Data Source
  • Using Multi Data Sources with Global Transactions
    • Rules for Data Sources within a Multi Data Source Using Global Transactions
    • Required Attributes of Data Sources within a Multi Data Source Using Global Transactions
    • Sample Configuration Code
  • Using Multi Data Sources without Global Transactions
    • Attributes of Data Sources within a Multi Data Source Not Using Global Transactions
    • Sample Configuration Code
  • Configuring Connections to Services on RAC Nodes
    • Configuring a Data Source to Connect to a Service
    • Service Connection Configurations
    • Connection Pool Capacity Planning
  • Using Connect-Time Failover with Oracle RAC
  • Using Connect-Time Failover without Global Transactions
    • Attributes of a Connect-Time Failover Configuration without Global Transactions
    • Sample Configuration Code
  • Using Fast Connection Failover
    • Required JDBC Driver Configuration for use with Oracle Fast Connection Failover
• XA Considerations and Limitations with Oracle RAC
  • Oracle RAC XA Requirements
    • A Global Transaction Must Be Initiated, Prepared, and Concluded in the Same Instance of the RAC Cluster
    • Transaction IDs Must Be Unique Within the RAC Cluster
  • Known Limitations When Using Oracle RAC with WebLogic Server
    • Potential for Inconsistent Transaction Completion (Data Loss) in Some Failure Conditions
    • Potential for Data Deadlocks in Some Failure Scenarios
    • Potential for Transactions Completed Out of Sequence
  • Known Issue Occurring After Database Server Crash
• JDBC Store Recovery with Oracle RAC
  • Configuring a JDBC Store for Use with Oracle RAC
  • Automatic Retry