/**
* Stop the registration of the {@link #candidate} for leader election. If the candidate is
* currently leader, its leadership will be revoked.
*/
@Override
public synchronized void stop() {
if (running) {
leaderSelector.close();
running = false;
}
}
@Override
public void close() {
leaderSelector.close();
client.close();
webServer.close();
}
/** Start the registration of the {@link #candidate} for leader election. */
@Override
public synchronized void start() {
if (!running) {
if (client.getState() != CuratorFrameworkState.STARTED) {
// we want to do curator start here because it needs to
// be started before leader selector and it gets a little
// complicated to control ordering via beans so that
// curator is fully started.
client.start();
}
leaderSelector = new LeaderSelector(client, buildLeaderPath(), new LeaderListener());
leaderSelector.setId(candidate.getId());
leaderSelector.autoRequeue();
leaderSelector.start();
running = true;
}
}
@Override
public void start() {
if (serverState == ServerState.STARTING || serverState == ServerState.STARTED) {
LOG.warn("Already at work!");
return;
}
serverState = ServerState.STARTING;
client.start();
leaderSelector.start();
serverState = ServerState.STARTED;
}
@Test
public void masterSelect2() {
RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 3);
CuratorFramework client =
CuratorFrameworkFactory.builder()
.connectString("anders1:2181,anders2:2181,anders3:2181")
.namespace("anders_test")
.retryPolicy(retryPolicy)
.connectionTimeoutMs(5000)
.sessionTimeoutMs(5000)
.build();
client.start();
LeaderSelector leaderSelector =
new LeaderSelector(
client,
"/leader_select",
new LeaderSelectorListener() {
@Override
public void stateChanged(CuratorFramework client, ConnectionState newState) {
System.out.println(newState.values());
}
@Override
public void takeLeadership(CuratorFramework client) throws Exception {
System.out.println("master2 is selected");
}
});
// leaderSelector.autoRequeue();
leaderSelector.start();
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
@Override
public void close() throws IOException {
leaderSelector.close();
}
public void start() throws IOException {
leaderSelector.start();
}
public ExampleClient(CuratorFramework client, String path, String name) {
this.name = name;
leaderSelector = new LeaderSelector(client, path, this);
leaderSelector.autoRequeue();
}