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Elasticsearch subproject :server
/*
* Licensed to Elasticsearch 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.Version;
import org.elasticsearch.common.io.stream.BytesStreamOutput;
import org.elasticsearch.transport.*;
import org.elasticsearch.transport.support.TransportStatus;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicBoolean;
/**
*
*/
public class LocalTransportChannel implements TransportChannel {
private static final String LOCAL_TRANSPORT_PROFILE = "default";
private final LocalTransport sourceTransport;
private final TransportServiceAdapter sourceTransportServiceAdapter;
// the transport we will *send to*
private final LocalTransport targetTransport;
private final String action;
private final long requestId;
private final Version version;
private final long reservedBytes;
private final AtomicBoolean closed = new AtomicBoolean();
public LocalTransportChannel(LocalTransport sourceTransport, TransportServiceAdapter sourceTransportServiceAdapter,
LocalTransport targetTransport, String action, long requestId, Version version, long reservedBytes) {
this.sourceTransport = sourceTransport;
this.sourceTransportServiceAdapter = sourceTransportServiceAdapter;
this.targetTransport = targetTransport;
this.action = action;
this.requestId = requestId;
this.version = version;
this.reservedBytes = reservedBytes;
}
@Override
public String action() {
return action;
}
@Override
public String getProfileName() {
return LOCAL_TRANSPORT_PROFILE;
}
@Override
public void sendResponse(TransportResponse response) throws IOException {
sendResponse(response, TransportResponseOptions.EMPTY);
}
@Override
public void sendResponse(TransportResponse response, TransportResponseOptions options) throws IOException {
try (BytesStreamOutput stream = new BytesStreamOutput()) {
stream.setVersion(version);
stream.writeLong(requestId);
byte status = 0;
status = TransportStatus.setResponse(status);
stream.writeByte(status); // 0 for request, 1 for response.
response.writeTo(stream);
sendResponseData(stream.bytes().toBytes());
sourceTransportServiceAdapter.onResponseSent(requestId, action, response, options);
}
}
@Override
public void sendResponse(Throwable error) throws IOException {
BytesStreamOutput stream = new BytesStreamOutput();
writeResponseExceptionHeader(stream);
RemoteTransportException tx = new RemoteTransportException(targetTransport.nodeName(), targetTransport.boundAddress().boundAddresses()[0], action, error);
stream.writeThrowable(tx);
sendResponseData(stream.bytes().toBytes());
sourceTransportServiceAdapter.onResponseSent(requestId, action, error);
}
private void sendResponseData(final byte[] data) {
close();
targetTransport.workers().execute(new Runnable() {
@Override
public void run() {
targetTransport.messageReceived(data, action, sourceTransport, version, null);
}
});
}
private void close() {
// attempt to close once atomically
if (closed.compareAndSet(false, true) == false) {
throw new IllegalStateException("Channel is already closed");
}
sourceTransport.inFlightRequestsBreaker().addWithoutBreaking(-reservedBytes);
}
@Override
public long getRequestId() {
return requestId;
}
@Override
public String getChannelType() {
return "local";
}
private void writeResponseExceptionHeader(BytesStreamOutput stream) throws IOException {
stream.writeLong(requestId);
byte status = 0;
status = TransportStatus.setResponse(status);
status = TransportStatus.setError(status);
stream.writeByte(status);
}
}