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Oracle GlassFish Server 3.1 Add-On Component Development Guide |
1. Introduction to the Development Environment for GlassFish Server Add-On Components
3. Extending the Administration Console
4. Extending the asadmin Utility
5. Adding Monitoring Capabilities
6. Adding Configuration Data for a Component
7. Adding Container Capabilities
8. Creating a Session Persistence Module
9. Packaging, Integrating, and Delivering an Add-On Component
You can implement the PersistenceStrategyBuilder interface by creating a new web session manager type.
package com.sun.enterprise.web; import com.sun.enterprise.deployment.runtime.web.SessionManager; import org.apache.catalina.Context; import org.jvnet.hk2.annotations.Contract; @Contract public interface PersistenceStrategyBuilder { public void initializePersistenceStrategy( Context ctx, SessionManager smBean, ServerConfigLookup serverConfigLookup); public void setPersistenceFrequency(String persistenceFrequency); public void setPersistenceScope(String persistenceScope); public void setPassedInPersistenceType(String persistenceType); }
Here is an example of how to implement the PersistenceStrategyBuilder interface by creating a new web session manager and setting a store for it:
@Service(name="xyz") public class XYZStrategyBuilder implements PersistenceStrategyBuilder { private String persistenceFrequency = null; private String persistenceScope = null; private String persistenceType = null; public void init(StandardContext ctx, SessionManager sessionManager, ServerConfigLookup serverConfigLookup) { // add listeners, valves, etc. to the ctx // Set the manager and store } public void setPersistenceFrequency(String persistenceFrequency) { this.persistenceFrequency = persistenceFrequency; } public void setPersistenceScope(String persistenceScope) { this.persistenceScope = persistenceScope; } public void setPassedInPersistenceType(String persistenceType) { this.passedInPersistenceType = persistenceType; } }
If a Manager is provided, then it will be used in GlassFish Server.
Note - If a backing store is required, it is the responsibility of the Manager to make sure that the findSession method correctly uses the Store that the Manager provides.
Example 8-1 Implementing PersistenceStrategyBuilder With a Custom Web Session Manager
This example defines a session manager type that is named MyHASolution.
@Service(name="MyHASolution") public class MyHASolutionStrategyBuilder implements PersistenceStrategyBuilder { private String persistenceFrequency = null; private String persistenceScope = null; private String persistenceType = null; public void init(StandardContext ctx, SessionManager sessionManager, ServerConfigLookup serverConfigLookup) { // add listeners, valves, etc. to the ctx // Set the manager and store MyManager myManager = new MyManager(persistenceType, persistenceFrequency); // (You could also make this a service and look it up in the habitat. // For simplicity we are just doing a new implementation of the class here.) MyStore store = new MyStore(); myManager.setStore(store); ctx.setManager(myManager); } public void setPersistenceFrequency(String persistenceFrequency) { this.persistenceFrequency = persistenceFrequency; } public void setPersistenceScope(String persistenceScope) { this.persistenceScope = persistenceScope; } public void setPassedInPersistenceType(String persistenceType) { this.passedInPersistenceType = persistenceType; } }
Example 8-2 Session Manager Configuration in the glassfish-web.xml File
This example sets the persistence-type attribute of the session-manager element of glassfish-web.xml to myHASolution
Based on the domain.xml and glassfish-web.xml settings, the web container looks up the appropriate PersistenceStrategyBuilder interface in the Habitat and uses it.
<glassfish-web-app> <session-config> <session-manager persistence-type="myHASolution"/> <session-config> <glassfish-web-app>