// =================================================================================================
// Copyright 2011 Twitter, Inc.
// -------------------------------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this work except in compliance with the License.
// You may obtain a copy of the License in the LICENSE file, or 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.twitter.common.thrift.monitoring;
import com.google.common.base.Preconditions;
import com.twitter.common.net.loadbalancing.RequestTracker;
import org.apache.thrift.TException;
import org.apache.thrift.TProcessor;
import org.apache.thrift.protocol.TProtocol;
import org.apache.thrift.transport.TSocket;
import java.net.InetSocketAddress;
import static com.twitter.common.net.loadbalancing.RequestTracker.RequestResult.*;
/**
* A TProcessor that joins a wrapped TProcessor with a monitor.
*
* @author William Farner
*/
public class TMonitoredProcessor implements TProcessor {
private final TProcessor wrapped;
private final TMonitoredServerSocket monitoredServerSocket;
private final RequestTracker<InetSocketAddress> monitor;
public TMonitoredProcessor(TProcessor wrapped, TMonitoredServerSocket monitoredServerSocket,
RequestTracker<InetSocketAddress> monitor) {
this.wrapped = Preconditions.checkNotNull(wrapped);
this.monitoredServerSocket = Preconditions.checkNotNull(monitoredServerSocket);
this.monitor = Preconditions.checkNotNull(monitor);
}
@Override
public boolean process(TProtocol in, TProtocol out) throws TException {
long startNanos = System.nanoTime();
boolean exceptionThrown = false;
try {
return wrapped.process(in, out);
} catch (TException e) {
exceptionThrown = true;
throw e;
} finally {
InetSocketAddress address = monitoredServerSocket.getAddress((TSocket) in.getTransport());
Preconditions.checkState(address != null,
"Address unknown for transport " + in.getTransport());
monitor.requestResult(address, exceptionThrown ? FAILED : SUCCESS,
System.nanoTime() - startNanos);
}
}
}