package com.arjuna.xts.nightout.services.recovery;
import org.jboss.jbossts.xts.recovery.participant.ba.XTSBARecoveryModule;
import org.jboss.jbossts.xts.recovery.participant.ba.XTSBARecoveryManager;
import java.io.ObjectInputStream;
import com.arjuna.wst.BusinessAgreementWithParticipantCompletionParticipant;
import com.arjuna.wst.BusinessAgreementWithCoordinatorCompletionParticipant;
/**
* Application-specific WS-AT participant recovery manager for demo application, This class
* is responsible for recreating application-specific durable participants from records
* logged at prepare time.
*/
public class DemoRPCBARecoveryModule implements XTSBARecoveryModule
{
/**
* the singleton recovery module
*/
private static DemoRPCBARecoveryModule theRecoveryModule = null;
/**
* a count of how many xts demo services are currently installed
*/
private static int serviceCount = 0;
/**
* called during deployment of an xts-demo web service to ensure the recovery module for the
* demo is installed whenever any of the services is active
*/
public static void register()
{
if (theRecoveryModule == null) {
theRecoveryModule = new DemoRPCBARecoveryModule();
}
if (serviceCount == 0) {
XTSBARecoveryManager.getRecoveryManager().registerRecoveryModule(theRecoveryModule);
}
serviceCount++;
}
/**
* called during undeployment of an xts-demo web service to ensure the recovery module for
* the demo is deinstalled once none of the services is active
*/
public static void unregister()
{
if (serviceCount > 0) {
serviceCount--;
if (serviceCount == 0) {
XTSBARecoveryManager.getRecoveryManager().unregisterRecoveryModule(theRecoveryModule);
}
}
}
/**
* called during recovery processing to allow an application to identify a participant id
* belonging to one of its participants and recreate the participant by deserializing
* it from the supplied object input stream. n.b. this is only appropriate in case the
* original was a ParticipantCompletion participant saved using serialization.
* @param id the id used when the participant was created
* @param stream a stream from which the application should deserialise the participant
* if it recognises that the id belongs to the module's application
* @return the deserialized ParticipantCompletion participant
* @throws Exception if an error occurs deserializing the ParticipantCompletion participant
*/
public BusinessAgreementWithParticipantCompletionParticipant deserializeParticipantCompletionParticipant(String id, ObjectInputStream stream) throws Exception {
if (id.startsWith("com.arjuna.xts-demorpc:restaurantBA") ||
id.startsWith("com.arjuna.xts-demorpc:theatreBA") ||
id.startsWith("com.arjuna.xts-demorpc:taxiBA")) {
System.out.println("xts-demorpc : attempting to deserialize WS-BA ParticipantCompletion participant " + id);
BusinessAgreementWithParticipantCompletionParticipant participant = (BusinessAgreementWithParticipantCompletionParticipant)stream.readObject();
System.out.println("xts-demorpc : deserialized WS-BA ParticipantCompletion participant " + id);
return participant;
}
return null;
}
/**
* called during recovery processing to allow an application to identify a participant id
* belonging to one of its participants and use the saved recovery state to recreate the
* participant. n.b. this is only appropriate in case the original was a ParticipantCompletion
* participant saved after being converted to a byte array using the PersistibleBAParticipant
* interface.
* @param id the id used when the participant was created
* @param recoveryState a byte array returned form the original participant via a call to
* method getRecoveryState of interface PersistableBAParticipant
* @return the recreated ParticipantCompletion participant
* @throws Exception if an error occurs converting the recoveryState back to a
* ParticipantCompletion participant
*/
public BusinessAgreementWithParticipantCompletionParticipant recreateParticipantCompletionParticipant(String id, byte[] recoveryState) throws Exception {
if (id.startsWith("com.arjuna.xts-demorpc:restaurantBA") ||
id.startsWith("com.arjuna.xts-demorpc:theatreBA") ||
id.startsWith("com.arjuna.xts-demorpc:taxiBA")) {
// this should not get called -- xts-demo WS-AT participants are saved and restored
// using serialization
throw new Exception("xts-demorpc : invalid request to recreate() WS-BA ParticipantCompletion participant " + id);
}
return null;
}
/**
* called during recovery processing to allow an application to identify a participant id
* belonging to one of its participants and recreate the participant by deserializing
* it from the supplied object input stream. n.b. this is only appropriate in case the
* original was a CoordinatorCompletion participant saved using serialization.
* @param id the id used when the participant was created
* @param stream a stream from which the application should deserialise the participant
* if it recognises that the id belongs to the module's application
* @return the deserialized ParticipantCompletion participant
* @throws Exception if an error occurs deserializing the CoordinatorCompletion participant
*/
public BusinessAgreementWithCoordinatorCompletionParticipant deserializeCoordinatorCompletionParticipant(String id, ObjectInputStream stream) throws Exception {
if (id.startsWith("com.arjuna.xts-demorpc:restaurantBA") ||
id.startsWith("com.arjuna.xts-demorpc:theatreBA") ||
id.startsWith("com.arjuna.xts-demorpc:taxiBA")) {
System.out.println("xts-demorpc : attempting to deserialize WS-BA CoordinatorCompletion participant " + id);
BusinessAgreementWithCoordinatorCompletionParticipant participant = (BusinessAgreementWithCoordinatorCompletionParticipant)stream.readObject();
System.out.println("xts-demorpc : deserialized WS-BA CoordinatorCompletion participant " + id);
return participant;
}
return null;
}
/**
* called during recovery processing to allow an application to identify a participant id
* belonging to one of its participants and use the saved recovery state to recreate the
* participant. n.b. this is only appropriate in case the original was a CoordinatorCompletion
* participant saved after being converted to a byte array using the PersistibleBAParticipant
* interface.
* @param id the id used when the participant was created
* @param recoveryState a byte array returned form the original participant via a call to
* method getRecoveryState of interface PersistableBAParticipant
* @return the recreated ParticipantCompletion participant
* @throws Exception if an error occurs converting the recoveryState back to a
* CoordinatorCompletion participant
*/
public BusinessAgreementWithCoordinatorCompletionParticipant recreateCoordinatorCompletionParticipant(String id, byte[] recoveryState) throws Exception {
if (id.startsWith("com.arjuna.xts-demorpc:restaurantBA") ||
id.startsWith("com.arjuna.xts-demorpc:theatreBA") ||
id.startsWith("com.arjuna.xts-demorpc:taxiBA")) {
// this should not get called -- xts-demo WS-AT participants are saved and restored
// using serialization
throw new Exception("xts-demorpc : invalid request to recreate() WS-BA CoordinatorCompletion participant " + id);
}
return null;
}
}