Please give me an opportunity to redefine my questions more clearly
My question is
1. Is it not true that, the singleton service (MyClusterService) will be
started in the current master node only?
2. Do I need to use if ( isMasterNode() ) check, to avoid the starting the
Singleton service in the current slave node? (My worry is, Is this the right
way to control the service)
3. Is there any configuration available to control my singleton services from
getting started only in the current master node
Am I missing any of them
MyClusterService.java
| public class MyClusterService extends HAServiceMBeanSupport {
| private boolean isMasterNode = false;
| protected void startService() throws Exception {
| if (isMasterNode()) {
| log.info("MyClusterService Started Successfully");
| //Send JMS messages to indicate Service Started
| }else {
| log.info("MyClusterService - Waiting to acquire Master
Status");
| }
| }
| protected void stopService() {
| log.info("Stopping MyClusterService - If Slave is waiting it
will become master ");
| }
| public boolean isMasterNode() {
| return isMasterNode;
| }
| public void startSingleton() {
| isMasterNode = true;
| if (isMasterNode) {
| startService();
| }
| }
| public void stopSingleton() {
| stopService();
| isMasterNode=false;
| }
| }
|
jboss-service.xml
| <mbean code="org.jboss.ha.singleton.HASingletonController"
| name="my.com:service=MyService-HASingletonController">
|
| <depends>jboss:service=${jboss.partition.name:DefaultPartition}</depends>
| <depends>my.com:service=MyClusterService</depends>
| <attribute
| name="PartitionName">${jboss.partition.name:DefaultPartition}</attribute>
| <attribute
| name="TargetName">my.com:service=MyClusterService</attribute>
| <attribute name="TargetStartMethod">startSingleton</attribute>
| <attribute name="TargetStopMethod">stopSingleton</attribute>
| <!-- <attribute name="TargetStopMethodArgument">true</attribute> -->
| </mbean>
| <mbean code="com.my.cluster.MyClusterService"
| name="my.com:service=MyClusterService">
| <depends>my.com:service=OtherServices</depends>
| </mbean>
|
Thanks
Krithi
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