/*
* Licensed to ElasticSearch and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. ElasticSearch 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.elasticsearch.transport.local;
import org.elasticsearch.common.io.ThrowableObjectOutputStream;
import org.elasticsearch.common.io.stream.BytesStreamOutput;
import org.elasticsearch.common.io.stream.CachedStreamOutput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.transport.*;
import org.elasticsearch.transport.support.TransportStatus;
import java.io.IOException;
import java.io.NotSerializableException;
/**
*
*/
public class LocalTransportChannel implements TransportChannel {
private final LocalTransport sourceTransport;
// the transport we will *send to*
private final LocalTransport targetTransport;
private final String action;
private final long requestId;
public LocalTransportChannel(LocalTransport sourceTransport, LocalTransport targetTransport, String action, long requestId) {
this.sourceTransport = sourceTransport;
this.targetTransport = targetTransport;
this.action = action;
this.requestId = requestId;
}
@Override
public String action() {
return action;
}
@Override
public void sendResponse(TransportResponse response) throws IOException {
sendResponse(response, TransportResponseOptions.EMPTY);
}
@Override
public void sendResponse(TransportResponse response, TransportResponseOptions options) throws IOException {
CachedStreamOutput.Entry cachedEntry = CachedStreamOutput.popEntry();
try {
StreamOutput stream = cachedEntry.handles();
stream.writeLong(requestId);
byte status = 0;
status = TransportStatus.setResponse(status);
stream.writeByte(status); // 0 for request, 1 for response.
response.writeTo(stream);
stream.close();
final byte[] data = cachedEntry.bytes().bytes().copyBytesArray().toBytes();
targetTransport.threadPool().generic().execute(new Runnable() {
@Override
public void run() {
targetTransport.messageReceived(data, action, sourceTransport, null);
}
});
} finally {
CachedStreamOutput.pushEntry(cachedEntry);
}
}
@Override
public void sendResponse(Throwable error) throws IOException {
CachedStreamOutput.Entry cachedEntry = CachedStreamOutput.popEntry();
try {
BytesStreamOutput stream;
try {
stream = cachedEntry.bytes();
writeResponseExceptionHeader(stream);
RemoteTransportException tx = new RemoteTransportException(targetTransport.nodeName(), targetTransport.boundAddress().boundAddress(), action, error);
ThrowableObjectOutputStream too = new ThrowableObjectOutputStream(stream);
too.writeObject(tx);
too.close();
} catch (NotSerializableException e) {
cachedEntry.reset();
stream = cachedEntry.bytes();
writeResponseExceptionHeader(stream);
RemoteTransportException tx = new RemoteTransportException(targetTransport.nodeName(), targetTransport.boundAddress().boundAddress(), action, new NotSerializableTransportException(error));
ThrowableObjectOutputStream too = new ThrowableObjectOutputStream(stream);
too.writeObject(tx);
too.close();
}
final byte[] data = stream.bytes().copyBytesArray().toBytes();
targetTransport.threadPool().generic().execute(new Runnable() {
@Override
public void run() {
targetTransport.messageReceived(data, action, sourceTransport, null);
}
});
} finally {
CachedStreamOutput.pushEntry(cachedEntry);
}
}
private void writeResponseExceptionHeader(BytesStreamOutput stream) throws IOException {
stream.writeLong(requestId);
byte status = 0;
status = TransportStatus.setResponse(status);
status = TransportStatus.setError(status);
stream.writeByte(status);
}
}