Examples with LeadershipParticipant com.hortonworks.registries.common.ha.LeadershipParticipant used on opensource projects

Example 1 with LeadershipParticipant

use of com.hortonworks.registries.common.ha.LeadershipParticipant in project registry by hortonworks.

the class RegistryApplication method registerHA.

private void registerHA(HAConfiguration haConfiguration, Environment environment) throws Exception {
    if (haConfiguration != null) {
        environment.lifecycle().addServerLifecycleListener(new ServerLifecycleListener() {

            @Override
            public void serverStarted(Server server) {
                String serverUrl = server.getURI().toString();
                LOG.info("Received callback as server is started with server URL:[{}]", server);
                LOG.info("HA configuration: [{}]", haConfiguration);
                String className = haConfiguration.getClassName();
                LeadershipParticipant leadershipParticipant = null;
                try {
                    leadershipParticipant = (LeadershipParticipant) Class.forName(className).newInstance();
                } catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) {
                    throw new RuntimeException(e);
                }
                leadershipParticipant.init(haConfiguration.getConfig(), serverUrl);
                leadershipParticipantRef.set(leadershipParticipant);
                LOG.info("Registering for leadership with participant [{}]", leadershipParticipant);
                try {
                    leadershipParticipantRef.get().participateForLeadership();
                } catch (Exception e) {
                    LOG.error("Error occurred while participating for leadership with serverUrl [{}]", serverUrl, e);
                    throw new RuntimeException(e);
                }
                LOG.info("Registered for leadership with participant [{}]", leadershipParticipant);
            }
        });
    } else {
        leadershipParticipantRef.set(LocalLeader.getInstance());
        LOG.info("No HA configuration exists, using [{}]", leadershipParticipantRef);
    }
}