Oracle ADF Scope and Session State
6.1.1.4 Oracle ADF Log File
The operations performed by the Fusion web application are logged directly to the WebLogic Managed Server where the application is running: DOMAIN_HOME serversserver_namelogsserver_name-diagnostic.log The log files for the different WebLogic Managed Servers are also available from the Oracle WebLogic Server Administration Console. To verify the logs, access the Oracle WebLogic Server Administration Console http:admin_server_ host:portconsole and click on Diagnostics-Log Files. This logs granularity and logging properties can be changed using Oracle Enterprise Manager Fusion Middleware Control Fusion Middleware Control. Fusion Middleware Control is a Web browser-based, graphical user interface that you can use to monitor and administer a farm. To receive high availability warning diagnostic messages for Oracle ADF, the level should be set to FINE, as described in Section 6.1.4.3, Troubleshooting Oracle ADF Replication and Failover Issues. For more information about the level of diagnostics you can specify for Fusion web applications, see the chapter on testing and debugging in the Oracle Fusion Middleware Fusion Developers Guide for Oracle Application Development Framework. For details about using Fusion Middleware Control to change the log settings of WebLogic Managed Servers and Oracle ADF, see the Oracle Fusion Middleware Administrators Guide.6.1.2 Oracle ADF High Availability Considerations
Fusion web applications built on the Oracle ADF technology stack are Java EE applications and J2EE applications. You should observe the same best practices for Fusion web applications as you would any other Java EE application in a high availability environment.6.1.2.1 Oracle ADF Scope and Session State
At runtime, ADF objects such as the binding container and managed beans are instantiated. Each of these objects has a defined life span set by its scope attribute. Configuring High Availability for Oracle ADF and WebCenter Applications 6-7 There are six types of scopes in a Fusion web application: ■ Application scope: The object is available for the duration of the application. ■ Session scope: The object is available for the duration of the session. ■ Page flow scope: The object is available for the duration of a bounded task flow. ■ Request scope: The object is available from the time an HTTP request is made until a response is sent back to the client. ■ Backing bean scope: Used for managed beans for page fragments and declarative components only, the object is available from the time an HTTP request is made until a response is sent back to the client. ■ View scope: The object is available until the view ID for the current view activity changes. This scope can be used to hold values for a given page. However, unlike request scope, which can be used to store a value needed from one page to the next, anything stored in view scope will be lost once the view ID changes. When the Fusion web application runs in a clustered environment, a portion of the applications state is serialized and copied to another server or a data store at the end of each request so that the state is available to other servers in the cluster. When you are designing an application to run in a clustered environment, you must: ■ Ensure that all managed beans with a life span longer than one request are serializable that is, they implement the java.io.Serializable interface. Specifically, beans stored in session scope, page flow scope, and view scope need to be serializable. ■ Ensure that Oracle ADF is aware of changes to managed beans stored in ADF scopes view scope and page flow scope and enable the tracking of changes to ADF memory scopes. When a value within a managed bean in either view scope or page flow scope is modified, the application needs to notify Oracle ADF so that it can ensure the beans new value is replicated. In Example 6–1 , an attribute of an object in view scope is modified. Example 6–1 Code that Modifies an Object in viewScope MapString, Object viewScope = AdfFacesContext.getCurrentInstance.getViewScope; MyObject obj = MyObjectviewScope.getmyObjectName; Obj.setFoonewValue; Without additional code, Oracle ADF will be unaware of this change and will not know that a new value needs to be replicated within the cluster. To inform Oracle ADF that an object in an ADF scope has been modified and that replication is needed, use the markScopeDirty method, as shown in Example 6–2 . The markScopeDirty method accepts only viewScope and pageFlowScope as parameters. Example 6–2 Additional Code to Notify Oracle ADF of Changes to an Object controllerContext ctx = ControllerContext.getInstance; ctx.markScopeDirtyviewScope; 6-8 Oracle Fusion Middleware High Availability Guide This code is needed for any request that modifies an existing object in one of the ADF scopes. If the scope itself is modified by the scopes put, remove, or clear methods, it is not necessary to notify Oracle ADF. To enable ADF Controller to track changes to ADF memory scopes and replicate the page flow scope and view scope within the server cluster, you can enable theadf-scope-ha-support parameter in the adf-config.xml file, as described in Section 6.1.3.3, Configuring adf-config.xml. For more information about ADF object scopes, see the chapter on Fusion page lifecycle in the Oracle Fusion Middleware Fusion Developers Guide for Oracle Application Development Framework.6.1.2.2 Oracle ADF Failover and Expected Behavior
Parts
» Oracle Fusion Middleware Online Documentation Library
» High Availability Problems High Availability Solutions
» High Availability Information in Other Documentation
» What Is the Administration Server? Understanding Managed Servers and Managed Server Clusters
» What Is a System Component Domain? What Is a Middleware Home? What Is a WebLogic Server Home?
» Oracle Fusion Middleware High Availability Terminology
» Server Load Balancing Oracle Fusion Middleware High Availability Technologies
» Local High Availability Active-Passive Deployment
» About Active-Active and Active-Passive Solutions
» Disaster Recovery Oracle Fusion Middleware High Availability Solutions
» Protection from Planned and Unplanned Down Time
» What Is a WebLogic Server Cluster? WebLogic Server Clusters and WebLogic Server Domains
» Application Failover Migration Key Capabilities of a Cluster
» Benefits of Clustering Types of Objects That Can Be Clustered
» Communications in a Cluster Cluster-Wide JNDI Naming Service
» Startup Process in a Cluster with Migratable Servers
» Administration Servers Role in Whole Server Migration Migratable Server Behavior in a Cluster
» Node Managers Role in Whole Server Migration Cluster Masters Role in Whole Server Migration
» Load Balancing Oracle Fusion Middleware Online Documentation Library
» Multi Data Sources Cluster Configuration and config.xml
» Java-Based Oracle Fusion Middleware Components Deployed to Oracle WebLogic Server
» Configuring Multi Data Sources for MDS Repositories
» Log on to SQLPlus as a system user, for example:
» Log on to SQLPlus as a user with sysdba privileges. For example:
» Configuring Multi Data Sources with Oracle RAC
» Oracle RAC Failover with WebLogic Server JDBC Clients
» Oracle Reports and Oracle Discoverer
» Troubleshooting Real Application Clusters
» SCAN Run Time Implications and Limitations
» Oracle SOA Service Infrastructure Protection from Failures and Expected Behavior
» Oracle SOA Service Infrastructure Cluster-Wide Configuration Changes
» Oracle BPEL Process Manager Request Flow and Recovery
» Oracle BPEL Process Manager Protection from Failures and Expected Behavior
» Oracle BPM Suite Component Characteristics
» Oracle BPM Suite Component Interaction
» Oracle BPMN Service Engine Single Instance Characteristics
» Oracle BPMN Service Engine High Availability Considerations
» Oracle Business Process Web Applications Single Instance Characteristics
» Oracle Business Process Analytics Single Instance Characteristics
» Oracle Mediator Component Characteristics Oracle Mediator Startup and Shutdown Lifecycle
» Oracle Mediator Request Flow
» Oracle Mediator Protection from Failures and Expected Behavior
» Troubleshooting Oracle Mediator High Availability
» Troubleshooting Oracle Human Workflow High Availability
» Oracle B2B Component Characteristics Oracle B2B Startup and Shutdown Lifecycle
» Oracle B2B Protection from Failures and Expected Behavior
» Oracle WSM Component Characteristics Oracle WSM Startup and Shutdown Lifecycle
» Oracle WSM Protection from Failures and Expected Behavior
» Oracle WSM Cluster-Wide Configuration Changes Configuring the Java Object Cache for Oracle WSM
» Configuring Distributed Notifications for the MDS Repository
» Oracle User Messaging Service Component Characteristics
» Oracle User Messaging Service Protection from Failures and Expected Behavior
» Oracle User Messaging Service Cluster-Wide Configuration Changes
» Oracle JCA Adapters Component Lifecycle
» Oracle JCA Adapters Reliability and Transactional Behavior
» Oracle JCA Adapters - Rejected Message Handling
» Oracle JCA Adapters High Availability Error Handling Oracle Database Adapters High Availability
» Oracle JMS Adapters High Availability
» Oracle JCA Adapters Log File Locations
» Oracle Business Activity Monitoring Component Characteristics
» Oracle Business Activity Monitoring Configuration Artifacts
» Oracle Business Activity Monitoring Protection from Failures and Expected Behavior
» Oracle Business Activity Monitoring Cluster-Wide Configuration Changes
» Oracle Service Bus Session State Oracle Service Bus External Dependencies
» Oracle Service Bus Configuration Artifacts Oracle Service Bus Deployment Artifacts
» Oracle Service Bus Protection from Failures and Expected Behavior
» Database Prerequisites VIP and IP Prerequisites Shared Storage Prerequisites
» Configuring Virtual Server Names and Ports for the Load Balancer
» Validating Oracle HTTP Server To verify that Oracle HTTP Server is set up
» Setting Connection Destination Identifiers for B2B Queues
» Starting Node Manager on SOAHOST2 Starting and Validating the WLS_SOA2 Managed Server
» Setting the Front End HTTP Host and Port
» Setting the WLS Cluster Address for Direct BindingRMI Invocations to Composites
» Deploying Applications Click Next.
» Configuring Server Migration for the WLS_SOA Servers
» Connect to the database as the leasing user. Run the leasing.ddl script in SQLPlus.
» Click Save. Oracle Fusion Middleware Online Documentation Library
» Enabling VIP1 and VIP3 in SOAHOST1 and VIP2 and VIP4 in SOAHOST2
» Configure Oracle Coherence for the Oracle Service Bus Result Cache
» Configuring a Default Persistent Store for Transaction Recovery Deploying Applications
» Configuring Server Migration for the WLS_OSB Servers
» Enabling VIP0 and VIP1 on BAMHOST1
» Oracle ADF Components Understanding Oracle ADF
» Oracle ADF Single Node Architecture Oracle ADF External Dependencies
» Oracle ADF Scope and Session State
» Oracle ADF Failover and Expected Behavior Oracle ADF Active Data Services
» Troubleshooting Oracle ADF Development Issues
» Deploying the ADF Application Validating Access through Oracle HTTP Server
» Select the Control tab. Select Environment Servers from the Administration Console. Select Clone.
» Oracle WebCenter Components Understanding Oracle WebCenter
» Oracle WebCenter Single-node Architecture Oracle WebCenter State and Configuration Persistence
» Oracle WebCenter External Dependencies
» Oracle WebCenter Configuration Considerations
» Oracle WebCenter Analytics Communications
» Oracle WebCenter State Replication Understanding the Distributed Java Object Cache
» Maintaining Configuration in a Clustered Environment
» Installing Oracle Fusion Middleware for Oracle WebCenter
» Enabling the Administration Server VIP
» Configuring a Virtual Host for Oracle Pagelet Producer and Sharepoint
» Configuring Activity Graph Click Start.
» Converting Discussions from Multicast to Unicast
» Configuring a Cluster for Oracle WebCenter Portal Applications
» Agent Startup and Shutdown Cycle Oracle Data Integrator External Dependencies
» Java EE Agent Configuration Standalone Agent Configuration
» Oracle Data Integrator Clustered Deployment
» WebLogic Server or Standalone Agent Crash Repository Database Failure
» About the 11g Oracle Identity Management Products
» Database Prerequisites Installing and Configuring the Database Repository
» Oracle Internet Directory Component Characteristics
» Oracle Internet Directory High Availability Architecture
» Protection from Failures and Expected Behavior
» Installing Oracle Fusion Middleware for Identity Management The next step is to
» Registering Oracle Internet Directory with a WebLogic Domain If you want to
» Creating boot.properties for the Administration Server on OIDHOST1 This section
» Configuring Oracle Internet Directory on OIDHOST2 Ensure that the Oracle Internet
» Validating Oracle Internet Directory High Availability
» Performing an Oracle Internet Directory Failover Performing an Oracle RAC Failover
» Troubleshooting Oracle Internet Directory High Availability
» Changing the Password of the ODS Schema Used by Oracle Internet Directory
» Oracle Virtual Directory Runtime Considerations Oracle Virtual Directory Component Characteristics
» Oracle Virtual Directory High Availability Architecture
» Configuring Oracle Virtual Directory on OVDHOST2 Follow these steps to configure
» Registering Oracle Virtual Directory with a WebLogic Domain It is recommended
» On the Installation Complete screen, click Finish to confirm your choice to exit.
» Troubleshooting LDAP Adapter Creation
» Oracle Directory Integration Platform Component Characteristics
» Oracle Directory Integration Platform High Availability Architecture
» Configuring Oracle HTTP Server for Oracle Directory Services Manager High
» If WebLogic Node Manager Fails to Start Operation Cannot Be Completed for Unknown Errors Message
» Oracle Directory Services Manager Component Characteristics
» Oracle Directory Services Manager High Availability Architecture
» Protection from Failures and Expected Behaviors
» Performing a WebLogic Server Instance Failover
» Using Oracle Directory Services Manager to Validate a Failover of a Managed Server
» Collocated Architecture Overview Troubleshooting Collocated Components Manager High Availability
» Additional Considerations for Collocated Components High Availability
» Oracle Access Manager Component Characteristics
» Oracle Access Manager High Availability Architecture
» Oracle Security Token Service High Availability Architecture
» Oracle Security Token Service Component Characteristics
» In the Customize Server and Cluster Configuration screen, select Yes, and click
» On the Configuration Summary screen, click Create to begin the creation process.
» Oracle Identity Manager Component Characteristics
» Runtime Processes Component and Process Lifecycle
» Starting and Stopping Oracle Identity Manager Configuration Artifacts External Dependencies
» Oracle Identity Manager High Availability Architecture
» On the Welcome screen, select Create a WebLogic Domain.
» Connect to the database as the leasing user.
» Select Environment - Servers from the Administration Console. Select Clone.
» Select the Automatic Server Migration Enabled option. This enables the Node Click Save.
» Click the OIMMSServerXXXXXX subdeployment. Add the new JMS Server
» Click Save. Authorization Policy Manager High Availability
» Oracle Adaptive Access Manager Component Characteristics
» Oracle Adaptive Access Manager High Availability Architecture
» On the Welcome screen, click Next.
» Oracle Identity Federation Component Characteristics
» High Availability Considerations for Integration with Oracle Access Manager
» Oracle Internet Directory Oracle Virtual Directory Oracle HTTP Server Node Manager
» WebLogic Administration Server Oracle Identity Manager
» Oracle Access Manager Managed Servers Oracle Adaptive Access Manager Managed Servers
» Oracle Identity Federation Starting and Stopping Oracle Identity Management Components
» Oracle HTTP Server and Oracle WebLogic Server
» Prerequisites Configuring Oracle HTTP Server for High Availability
» Install Oracle HTTP Server on WEBHOST2
» Oracle Web Cache Request Flow
» Oracle Web Cache Stateless Load Balancing
» Oracle Web Cache Backend Failover Oracle Web Cache Session Binding
» Oracle Web Cache Cluster-Wide Configuration Changes
» Oracle Web Cache as a Software Load Balancer
» From the Session Name list, select a session to enable binding for a specific
» Click Add. In the Component field, enter the name of the cache member.
» Adding a Node in Oracle Advanced Database Multimaster Replication
» Deleting a Node in Oracle Advanced Database Multimaster Replication
» Oracle IPM Component Characteristics
» Oracle IPM High Availability Architecture
» Creation of Oracle IPM Artifacts in a Cluster Troubleshooting Oracle IPM
» Oracle UCM Component Characteristics
» Oracle UCM High Availability Architecture
» Oracle UCM and Inbound Refinery High Availability Architecture
» Oracle URM High Availability Protection from Failure and Expected Behaviors
» Shared Storage Configuring the Oracle Database
» Installing Oracle ECM on ECMHOST1
» On the Welcome screen, select Create a new WebLogic domain.
» In the Select JMS Distributed Destination Type screen, select UDD from the
» Configuring Oracle HTTP Server on WEBHOST1
» Terminology for Directories and Directory Environment Variables
» Administration Server Topology 1 Transforming Oracle Fusion Middleware Infrastructure Components
» Administration Server Topology 2 Transforming Oracle Fusion Middleware Infrastructure Components
» Click Activate Changes. Choose Environment Servers. Click Control. Select WLS_EXMPL. Click Start.
» Transforming Oracle Internet Directory and Its Clients
» Select the Connect to a directory -- Create A New Connection link in the
» Click JDBC Connection under Data Sources.
» Click Administration. Click Scheduler Configuration under System Maintenance Click Apply.
» Database Instance Platform-Specific Considerations
» Example Topology 1 Example Topology 2
» Destination Topologies Cold Failover Cluster Transformation Procedure
» Introduction to Oracle Clusterware Cluster Ready Services and Oracle Fusion Middleware
» Upgrading Older Versions of ASCRS to the Current ASCRS Version Installing ASCRS
» Configuring ASCRS with Oracle Fusion Middleware
» Creating a Virtual IP Resource Creating a Shared Disk Resource
» Creating an Oracle Database Listener Resource Creating an Oracle Database Resource
» Creating a Middleware Resource
» Updating Resources Starting Up Resources Shutting Down Resources Resource Switchover
» Oracle Portal, Forms, Reports, and Discoverer Architecture
» Oracle Forms Runtime Considerations Oracle Forms Process Flow
» Oracle Forms Configuration Files Oracle Forms External Dependencies Oracle Forms Log Files
» Oracle Discoverer Runtime Considerations
» Preference Server Failover Session State Replication and Failover Performance Recommendation
» Dependencies Network Requirements Prerequisites
» Install Oracle WebLogic Server Install Oracle Portal, Forms, Reports, and Discoverer Validation
» Oracle BI EE Component Characteristics
» Oracle BI EE and EPM High Availability Architecture
» Shared Files and Directories
» Cluster-Wide Configuration Changes Oracle BI EE High Availability Concepts
» Oracle Essbase Component Characteristics
» Oracle Essbase High Availability Architecture Protection from Failures and Expected Behaviors
» Oracle Hyperion Provider Services Component Characteristics
» Oracle Hyperion Provider Services High Availability Architecture
» Workspace Component Characteristics Oracle EPM Workspace Component Architecture
» Workspace High Availability Architecture
» Oracle Hyperion Financial Reporting Component Characteristics
» Oracle BI Publisher Component Characteristics
» Oracle BI Publisher High Availability Architecture
» Oracle RTD Component Characteristics
» Oracle RTD High Availability Architecture
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