org.graylog2.inputs.InputStateListener Maven / Gradle / Ivy
/**
* This file is part of Graylog.
*
* Graylog is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Graylog is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Graylog. If not, see .
*/
package org.graylog2.inputs;
import com.google.common.eventbus.EventBus;
import com.google.common.eventbus.Subscribe;
import org.graylog2.notifications.Notification;
import org.graylog2.notifications.NotificationService;
import org.graylog2.plugin.IOState;
import org.graylog2.plugin.ServerStatus;
import org.graylog2.plugin.events.inputs.IOStateChangedEvent;
import org.graylog2.plugin.inputs.MessageInput;
import org.graylog2.shared.inputs.InputRegistry;
import org.graylog2.shared.system.activities.Activity;
import org.graylog2.shared.system.activities.ActivityWriter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.inject.Inject;
public class InputStateListener {
private static final Logger LOG = LoggerFactory.getLogger(InputStateListener.class);
private NotificationService notificationService;
private ActivityWriter activityWriter;
private ServerStatus serverStatus;
@Inject
public InputStateListener(EventBus eventBus,
NotificationService notificationService,
ActivityWriter activityWriter,
ServerStatus serverStatus) {
this.notificationService = notificationService;
this.activityWriter = activityWriter;
this.serverStatus = serverStatus;
eventBus.register(this);
}
@Subscribe public void inputStateChanged(IOStateChangedEvent event) {
final IOState state = event.changedState();
final MessageInput input = state.getStoppable();
switch (event.newState()) {
case FAILED:
activityWriter.write(new Activity(state.getDetailedMessage(), InputRegistry.class));
Notification notification = notificationService.buildNow();
notification.addType(Notification.Type.INPUT_FAILED_TO_START).addSeverity(Notification.Severity.NORMAL);
notification.addNode(serverStatus.getNodeId().toString());
notification.addDetail("input_id", input.getId());
notification.addDetail("reason", state.getDetailedMessage());
notificationService.publishIfFirst(notification);
break;
case RUNNING:
notificationService.fixed(Notification.Type.NO_INPUT_RUNNING);
// fall through
default:
final String msg = "Input [" + input.getName() + "/" + input.getId() + "] is now " + event.newState().toString();
activityWriter.write(new Activity(msg, InputStateListener.class));
break;
}
LOG.debug("Input State of [{}/{}] changed: {} -> {}", input.getTitle(), input.getId(), event.oldState(), event.newState());
LOG.info("Input [{}/{}] is now {}", input.getName(), input.getId(), event.newState());
}
}