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Stdout.java
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Stdout.java
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/*
* Licensed to Elasticsearch B.V. under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch B.V. licenses this file to you 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.logstash.plugins.outputs;
import co.elastic.logstash.api.Codec;
import co.elastic.logstash.api.Configuration;
import co.elastic.logstash.api.Context;
import co.elastic.logstash.api.Event;
import co.elastic.logstash.api.LogstashPlugin;
import co.elastic.logstash.api.Output;
import co.elastic.logstash.api.PluginConfigSpec;
import co.elastic.logstash.api.PluginHelper;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Collection;
import java.util.Collections;
import java.util.concurrent.CountDownLatch;
/**
* Java implementation of the "stdout" output plugin
* */
@LogstashPlugin(name = "java_stdout")
public class Stdout implements Output {
public static final PluginConfigSpec<Codec> CODEC_CONFIG =
PluginConfigSpec.codecSetting("codec", "java_line");
private Codec codec;
private OutputStream outputStream;
private final CountDownLatch done = new CountDownLatch(1);
private String id;
/**
* Required constructor.
*
* @param id Plugin id
* @param configuration Logstash Configuration
* @param context Logstash Context
*/
public Stdout(final String id, final Configuration configuration, final Context context) {
this(id, configuration, context, System.out);
}
Stdout(final String id, final Configuration configuration, final Context context, OutputStream targetStream) {
this.id = id;
this.outputStream = targetStream;
codec = configuration.get(CODEC_CONFIG);
if (codec == null) {
throw new IllegalStateException("Unable to obtain codec");
}
}
@Override
public void output(final Collection<Event> events) {
try {
for (Event e : events) {
codec.encode(e, outputStream);
}
} catch (IOException ex) {
throw new IllegalStateException(ex);
}
}
@Override
public void stop() {
done.countDown();
}
@Override
public void awaitStop() throws InterruptedException {
done.await();
}
@Override
public Collection<PluginConfigSpec<?>> configSchema() {
return PluginHelper.commonOutputSettings(Collections.singletonList(CODEC_CONFIG));
}
@Override
public String getId() {
return id;
}
}