/**
* 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.collector;
import java.io.IOException;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.cloudera.flume.conf.FlumeConfiguration;
import com.cloudera.flume.conf.SourceFactory.SourceBuilder;
import com.cloudera.flume.core.Event;
import com.cloudera.flume.core.EventSource;
import com.cloudera.flume.handlers.thrift.ThriftEventSource;
import com.cloudera.flume.reporter.ReportEvent;
import com.google.common.base.Preconditions;
/**
* This is the default collector source in a agent/collector architecture.
*
* This is purposely setup as a layer of indirection between the actual
* implementation details to may user configuration simpler. It has a default
* options that come from flume-*.xml configuration file.
*
* The actual implementation may change in the future (for example, thrift may
* be replaced with avro) but user configurations would not need to change.
*
* TODO (jon) auto version negotiation? (With agent sink)
*/
public class CollectorSource extends EventSource.Base {
static final Logger LOG = LoggerFactory.getLogger(CollectorSource.class);
final EventSource src;
int port;
public CollectorSource(int port) {
this.src = new ThriftEventSource(port);
this.port = port;
}
@Override
public void close() throws IOException {
LOG.info("closed");
src.close();
}
@Override
public void open() throws IOException {
LOG.info("opened");
src.open();
}
@Override
public Event next() throws IOException {
Event e = src.next();
updateEventProcessingStats(e);
return e;
}
@Override
public void getReports(String namePrefix, Map<String, ReportEvent> reports) {
super.getReports(namePrefix, reports);
src.getReports(namePrefix + getName() + ".", reports);
}
/**
* Get the port the collector source listens on.
*/
public int getPort() {
return port;
}
public static SourceBuilder builder() {
return new SourceBuilder() {
@Override
public EventSource build(String... argv) {
// accept 0 or 1 argument.
Preconditions.checkArgument(argv.length <= 1,
"usage: collectorSource[(port={"
+ FlumeConfiguration.COLLECTOR_EVENT_PORT + "})]");
int port = FlumeConfiguration.get().getCollectorPort(); // default
if (argv.length >= 1)
port = Integer.parseInt(argv[0]); // override
return new CollectorSource(port);
}
};
}
}