/**
* 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.rpc;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.cloudera.flume.conf.Context;
import com.cloudera.flume.conf.FlumeConfiguration;
import com.cloudera.flume.conf.SinkFactory.SinkBuilder;
import com.cloudera.flume.core.EventSink;
import com.cloudera.flume.handlers.avro.AvroEventSink;
import com.cloudera.flume.handlers.thrift.ThriftEventSink;
/**
* This is a sink that is used to send events through an RPC, it either uses
* Avro or Thrift depending upon the EVENT_RPC_TYPE set in the configuration
* file.
*/
public class RpcSink extends EventSink.Base {
public static final Logger LOG = LoggerFactory.getLogger(RpcSink.class);
/**
* This class will build an AvroEventSink or ThriftEventSink depending on the
* value of EVENT_RPC_TYPE set in the configuration file.
*/
public static SinkBuilder builder() {
return new SinkBuilder() {
@Override
public EventSink build(Context context, String... args) {
if (args.length > 2) {
throw new IllegalArgumentException(
"usage: rpcSink([hostname, [portno]]) ");
}
String host = FlumeConfiguration.get().getCollectorHost();
int port = FlumeConfiguration.get().getCollectorPort();
if (args.length >= 1) {
host = args[0];
}
if (args.length >= 2) {
port = Integer.parseInt(args[1]);
}
/*
* I am hoping here that master calls this builder and at that time the
* FlumeConfiguration is all set.
*/
if (FlumeConfiguration.get().getEventRPC().equals(
FlumeConfiguration.RPC_TYPE_THRIFT)) {
return new ThriftEventSink(host, port);
}
if (FlumeConfiguration.get().getEventRPC().equals(
FlumeConfiguration.RPC_TYPE_AVRO)) {
return new AvroEventSink(host, port);
}
LOG.warn("event.rpc.type not defined. It should be either"
+ " \"THRIFT\" or \"AVRO\". Defaulting to Thrift");
return new ThriftEventSink(host, port);
}
};
}
}