gistfile1.java

/*
 * Copyright 2012 Couchbase, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.couchbase.mock.http;

import java.io.IOException;
import java.io.OutputStream;
import java.util.Observable;
import java.util.Observer;
import java.util.concurrent.CountDownLatch;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.couchbase.mock.Bucket;
import org.couchbase.mock.CouchbaseMock.HarakiriMonitor;
/**
 *
 * @author M. Nunberg
 */
public class BucketsStreamingHandler implements Observer {
    private final OutputStream output;
    private final Bucket bucket;
    private final HarakiriMonitor monitor;
    private final CountDownLatch completed;
    
    public BucketsStreamingHandler(HarakiriMonitor monitor, Bucket bucket, OutputStream output) {
        this.output = output;
        this.bucket = bucket;
        this.monitor = monitor;
        this.completed = new CountDownLatch(1);
    }
    
    
    @Override
    public void update(Observable o, Object arg) {
        try {
            bucket.configReadLock();
            output.write(StateGrabber.getBucketJSON(bucket).getBytes());
            output.write(StateGrabber.getStreamDelimiter().getBytes());
            output.flush();
            bucket.configReadUnlock();
        }
        catch (IOException ex) {
            Logger.getLogger(BucketsStreamingHandler.class.getName()).log(Level.SEVERE, null, ex);
            completed.countDown();
        }
    }
    
    public void startStreaming() throws IOException, InterruptedException {
        bucket.configReadLock();
        if (monitor != null) {
            monitor.addObserver(this);
        }
        output.write(StateGrabber.getBucketJSON(bucket).getBytes());
        output.write(StateGrabber.getStreamDelimiter().getBytes());
        output.flush();
        bucket.configReadUnlock();
        completed.await();
    }
}