/**
* Licensed to Cloudera, Inc. under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Cloudera, Inc. 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 com.cloudera.flume.handlers.debug;
import java.io.IOException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.cloudera.flume.conf.Context;
import com.cloudera.flume.conf.FlumeSpecException;
import com.cloudera.flume.conf.SinkFactory.SinkBuilder;
import com.cloudera.flume.core.Event;
import com.cloudera.flume.core.EventSink;
import com.cloudera.flume.handlers.text.FormatFactory;
import com.cloudera.flume.handlers.text.output.DebugOutputFormat;
import com.cloudera.flume.handlers.text.output.OutputFormat;
import com.google.common.base.Preconditions;
/**
* Simple print to console. This defaults to the "debug" output format instead
* of raw to give interactive users more feedback and information.
*/
public class ConsoleEventSink extends EventSink.Base {
static final Logger LOG = LoggerFactory.getLogger(ConsoleEventSink.class);
OutputFormat fmt;
public ConsoleEventSink() {
this(null);
}
public ConsoleEventSink(OutputFormat fmt) {
this.fmt = (fmt == null) ? DebugOutputFormat.builder().build() : fmt;
}
@Override
public void append(Event e) throws IOException, InterruptedException {
fmt.format(System.out, e);
super.append(e);
}
@Override
public void close() throws IOException {
LOG.info("ConsoleEventSink( " + fmt.getBuilder().getName() + " ) closed");
}
@Override
public void open() throws IOException {
LOG.info("ConsoleEventSink( " + fmt.getBuilder().getName() + " ) opened");
}
public static SinkBuilder builder() {
return new SinkBuilder() {
@Override
public EventSink build(Context context, String... argv) {
Preconditions.checkArgument(argv.length <= 1,
"usage: console[(format)]");
OutputFormat fmt = DebugOutputFormat.builder().build();
if (argv.length >= 1) {
// TODO (jon) handle formats with arguments. Requires language update.
try {
fmt = FormatFactory.get().getOutputFormat(argv[0]);
} catch (FlumeSpecException e) {
LOG.error("Bad output format name " + argv[0], e);
throw new IllegalArgumentException("Bad output format name "
+ argv[0], e);
}
}
return new ConsoleEventSink(fmt);
}
};
}
}