Examples of PreferredSingletonElectionPolicy

org.jboss.as.clustering.singleton.election.PreferredSingletonElectionPolicy
An election policy that always elects a preferred node, and defers to a default policy if the preferred node is not a candidate. The means of specifying the preferred node is the responsibility of the extending class. @author Paul Ferraro
org.wildfly.clustering.singleton.election.PreferredSingletonElectionPolicy
An election policy that always elects a preferred node, and defers to a default policy if the preferred node is not a candidate. The means of specifying the preferred node is the responsibility of the extending class. @author Paul Ferraro

Examples of org.jboss.as.clustering.singleton.election.PreferredSingletonElectionPolicy


    @Override
    public void contextInitialized(ServletContextEvent event) {
        MyService service = new MyService();
        SingletonService<Environment> singleton = new SingletonService<Environment>(service, MyService.SERVICE_NAME);
        singleton.setElectionPolicy(new PreferredSingletonElectionPolicy(new NamePreference(PREFERRED_NODE + "/" + SingletonService.DEFAULT_CONTAINER), new SimpleSingletonElectionPolicy()));
        singleton.setClassResolver(new SimpleClassResolver(this.getClass().getClassLoader()));
        ServiceController<Environment> controller = singleton.build(CurrentServiceContainer.getServiceContainer())
            .addDependency(ServerEnvironmentService.SERVICE_NAME, ServerEnvironment.class, service.getEnvInjector())
            .install()
        ;

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Examples of org.jboss.as.clustering.singleton.election.PreferredSingletonElectionPolicy

         * singleton on a node with a particular name, uncomment the first line  and
         * comment the second line below.
         *   - To pass a list of more than one node, comment the first line and uncomment the
         * second line below.
         */
        singleton.setElectionPolicy(new PreferredSingletonElectionPolicy(new SimpleSingletonElectionPolicy(), new NamePreference("node1/singleton")));
        //singleton.setElectionPolicy(new PreferredSingletonElectionPolicy(new SimpleSingletonElectionPolicy(), new NamePreference("node1/singleton"), new NamePreference("node2/singleton")));


        singleton.build(new DelegatingServiceContainer(context.getServiceTarget(), context.getServiceRegistry()))
                .setInitialMode(ServiceController.Mode.ACTIVE)
                .install()

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Examples of org.wildfly.clustering.singleton.election.PreferredSingletonElectionPolicy

        InjectedValue<ServerEnvironment> env = new InjectedValue<>();
        HATimerService service = new HATimerService(env);
        ServiceController<?> factoryService = context.getServiceRegistry().getRequiredService(SingletonServiceBuilderFactory.SERVICE_NAME.append(CONTAINER_NAME, CACHE_NAME));
        SingletonServiceBuilderFactory factory = (SingletonServiceBuilderFactory) factoryService.getValue();
        factory.createSingletonServiceBuilder(name, service)
            .electionPolicy(new PreferredSingletonElectionPolicy(new SimpleSingletonElectionPolicy(), new NamePreference(PREFERRED_NODE + "/" + CONTAINER_NAME)))
            .requireQuorum(quorum)
            .build(context.getServiceTarget())
                .addDependency(ServerEnvironmentService.SERVICE_NAME, ServerEnvironment.class, env)
                .setInitialMode(ServiceController.Mode.ACTIVE)
                .install()

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Examples of org.wildfly.clustering.singleton.election.PreferredSingletonElectionPolicy

        InjectedValue<ServerEnvironment> env = new InjectedValue<>();
        MyService service = new MyService(env);
        ServiceController<?> factoryService = context.getServiceRegistry().getRequiredService(SingletonServiceBuilderFactory.SERVICE_NAME.append(CONTAINER_NAME, CACHE_NAME));
        SingletonServiceBuilderFactory factory = (SingletonServiceBuilderFactory) factoryService.getValue();
        factory.createSingletonServiceBuilder(name, service)
            .electionPolicy(new PreferredSingletonElectionPolicy(new SimpleSingletonElectionPolicy(), new NamePreference(PREFERRED_NODE)))
            .requireQuorum(quorum)
            .build(context.getServiceTarget())
                .addDependency(ServerEnvironmentService.SERVICE_NAME, ServerEnvironment.class, env)
                .setInitialMode(ServiceController.Mode.ACTIVE)
                .install()

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Examples of org.wildfly.clustering.singleton.election.PreferredSingletonElectionPolicy

        when(preference2.preferred(same(node1))).thenReturn(false);
        when(preference2.preferred(same(node2))).thenReturn(true);
        when(preference2.preferred(same(node3))).thenReturn(false);
        when(preference2.preferred(same(node4))).thenReturn(false);


        assertSame(node1, new PreferredSingletonElectionPolicy(policy, preference1, preference2).elect(Arrays.asList(node1, node2, node3, node4)));
        assertSame(node1, new PreferredSingletonElectionPolicy(policy, preference1, preference2).elect(Arrays.asList(node4, node3, node2, node1)));
        assertSame(node2, new PreferredSingletonElectionPolicy(policy, preference1, preference2).elect(Arrays.asList(node2, node3, node4)));
        assertSame(node2, new PreferredSingletonElectionPolicy(policy, preference1, preference2).elect(Arrays.asList(node4, node3, node2)));


        List<Node> nodes = Arrays.asList(node3, node4);
        when(policy.elect(nodes)).thenReturn(node3);


        assertSame(node3, new PreferredSingletonElectionPolicy(policy, preference1, preference2).elect(nodes));


        when(policy.elect(nodes)).thenReturn(node4);


        assertSame(node4, new PreferredSingletonElectionPolicy(policy, preference1, preference2).elect(nodes));


        when(policy.elect(nodes)).thenReturn(null);


        assertNull(new PreferredSingletonElectionPolicy(policy, preference1, preference2).elect(nodes));
    }

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