/**
 * The MIT License
 *
 * Copyright (c) 2010-2011 Sonatype, Inc. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package org.hudsonci.events.ready;

import org.hudsonci.inject.Priority;
import hudson.model.listeners.ItemListener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;

import static com.google.common.base.Preconditions.checkNotNull;

/**
 * Starts the {@link ReadyDetector}.
 *
 * @author <a href="mailto:jason@planet57.com">Jason Dillon</a>
 * @since 2.1.0
 */
@Named
@Singleton
@Priority(Integer.MIN_VALUE) // run last
public class ReadyDetectorStarter
    extends ItemListener
{
    private static final Logger log = LoggerFactory.getLogger(ReadyDetectorStarter.class);

    // FIXME: Use of ItemListener for server life-cycle bits is highly hackish

    private final ReadyDetector detector;

    @Inject
    public ReadyDetectorStarter(final ReadyDetector detector) {
        this.detector = checkNotNull(detector);
    }

    @Override
    public void onLoaded() {
        log.debug("Starting ready detector");
        detector.start();
    }
}