Examples with LeaderChangedEvent org.graylog2.cluster.leader.LeaderChangedEvent used on opensource projects

Example 1 with LeaderChangedEvent

use of org.graylog2.cluster.leader.LeaderChangedEvent in project graylog2-server by Graylog2.

the class InputEventListener method leaderChanged.

@Subscribe
public void leaderChanged(LeaderChangedEvent event) {
    if (serverStatus.getLifecycle() == Lifecycle.STARTING) {
        LOG.debug("Ignoring LeaderChangedEvent during server startup.");
        return;
    }
    if (leaderElectionService.isLeader()) {
        for (MessageInput input : persistedInputs) {
            final IOState<MessageInput> inputState = inputRegistry.getInputState(input.getId());
            if (input.onlyOnePerCluster() && input.isGlobal() && (inputState == null || inputState.canBeStarted()) && inputLauncher.shouldStartAutomatically(input)) {
                LOG.info("Got leader role. Starting input [{}/{}/{}]", input.getName(), input.getTitle(), input.getId());
                startMessageInput(input);
            }
        }
    } else {
        inputRegistry.getRunningInputs().stream().map(IOState::getStoppable).filter(input -> input.isGlobal() && input.onlyOnePerCluster()).forEach(input -> {
            LOG.info("Lost leader role. Stopping input [{}/{}/{}]", input.getName(), input.getTitle(), input.getId());
            inputDeleted(InputDeleted.create(input.getId()));
        });
    }
}