GitWebSocketMessenger.java

/*******************************************************************************
 * Copyright (c) 2012-2017 Codenvy, S.A.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Codenvy, S.A. - initial API and implementation
 *******************************************************************************/
package org.eclipse.che.api.git;

import org.eclipse.che.api.core.notification.EventService;
import org.eclipse.che.api.core.notification.EventSubscriber;
import org.eclipse.che.api.git.shared.GitCheckoutEvent;
import org.eclipse.che.dto.server.DtoFactory;
import org.eclipse.che.inject.StringArrayConverter;
import org.everrest.websockets.WSConnectionContext;
import org.everrest.websockets.message.ChannelBroadcastMessage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.inject.Inject;
import javax.inject.Singleton;

/**
 * @author Anton Korneta.
 */
@Singleton
public class GitWebSocketMessenger implements EventSubscriber<GitCheckoutEvent> {
    private static final Logger LOG = LoggerFactory.getLogger(GitWebSocketMessenger.class);
    private static final String CHANNEL = "git:checkout:%s:%s";

    private final EventService eventService;

    @Inject
    public GitWebSocketMessenger(EventService eventService) {
        this.eventService = eventService;
    }

    @PostConstruct
    private void subscribe() {
        eventService.subscribe(this);
    }

    @PreDestroy
    private void unsubscribe() {
        eventService.unsubscribe(this);
    }

    @Override
    public void onEvent(GitCheckoutEvent event) {
        try {
            final ChannelBroadcastMessage bm = new ChannelBroadcastMessage();
            final String channel = String.format(CHANNEL, event.getWorkspaceId(), event.getProjectName());
            bm.setChannel(channel);
            bm.setBody(DtoFactory.getInstance().toJson(event));
            WSConnectionContext.sendMessage(bm);
        } catch (Exception e) {
            LOG.error(e.getMessage(), e);
        }
    }
}