com.sematext.ag.player.SimplePlayer.java Source code

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Here is the source code for com.sematext.ag.player.SimplePlayer.java

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/**
 * Copyright 2010 Sematext International
 *
 * 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 com.sematext.ag.player;

import com.sematext.ag.Player;
import com.sematext.ag.event.Event;
import com.sematext.ag.exception.InitializationFailedException;
import com.sematext.ag.sink.Sink;
import com.sematext.ag.source.Source;
import com.sematext.ag.source.SourceFactory;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * Base player implementation.
 * 
 * @author sematext, http://www.sematext.com/
 */
public class SimplePlayer extends Player {
    private static final Log LOG = LogFactory.getLog(SimplePlayer.class);

    /**
     * (non-Javadoc)
     * 
     * @see com.sematext.ag.Player#play(com.sematext.ag.source.SourceFactory, com.sematext.ag.sink.Sink)
     */
    @Override
    public void play(SourceFactory sourceFactory, Sink<Event> sink) {
        LOG.info("Actions will be played using one source.");
        Source source = null;
        try {
            source = sourceFactory.create();
        } catch (InitializationFailedException e) {
            LOG.error("Source initialization failed. Can not proceed with playing, stopping...", e);
            return;
        }

        try {
            play(sink, source);
        } finally {
            source.close();
        }
    }

    protected void play(Sink<Event> sink, Source source) {
        Event e = source.nextEvent();
        while (null != e) {
            try {
                sink.startCounters();
                sink.write(e);
                sink.endCounters();
            } catch (Exception ex) {
                LOG.error("Error writing to sink, skipping event. Cause: " + ex.getCause());
            }
            e = source.nextEvent();
        }
    }
}