/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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.apache.hedwig.server.handlers;
import org.apache.hedwig.protocol.PubSubProtocol;
import org.jboss.netty.channel.Channel;
import org.apache.bookkeeper.util.MathUtils;
import org.apache.hedwig.exceptions.PubSubException;
import org.apache.hedwig.protocol.PubSubProtocol.Message;
import org.apache.hedwig.protocol.PubSubProtocol.OperationType;
import org.apache.hedwig.protocol.PubSubProtocol.PubSubRequest;
import org.apache.hedwig.protoextensions.PubSubResponseUtils;
import org.apache.hedwig.server.common.ServerConfiguration;
import org.apache.hedwig.server.netty.ServerStats;
import org.apache.hedwig.server.netty.ServerStats.OpStats;
import org.apache.hedwig.server.netty.UmbrellaHandler;
import org.apache.hedwig.server.persistence.PersistRequest;
import org.apache.hedwig.server.persistence.PersistenceManager;
import org.apache.hedwig.server.topics.TopicManager;
import org.apache.hedwig.util.Callback;
public class PublishHandler extends BaseHandler {
private PersistenceManager persistenceMgr;
private final OpStats pubStats;
public PublishHandler(TopicManager topicMgr, PersistenceManager persistenceMgr, ServerConfiguration cfg) {
super(topicMgr, cfg);
this.persistenceMgr = persistenceMgr;
this.pubStats = ServerStats.getInstance().getOpStats(OperationType.PUBLISH);
}
@Override
public void handleRequestAtOwner(final PubSubRequest request, final Channel channel) {
if (!request.hasPublishRequest()) {
UmbrellaHandler.sendErrorResponseToMalformedRequest(channel, request.getTxnId(),
"Missing publish request data");
pubStats.incrementFailedOps();
return;
}
Message msgToSerialize = Message.newBuilder(request.getPublishRequest().getMsg()).setSrcRegion(
cfg.getMyRegionByteString()).build();
final long requestTime = MathUtils.now();
PersistRequest persistRequest = new PersistRequest(request.getTopic(), msgToSerialize,
new Callback<PubSubProtocol.MessageSeqId>() {
@Override
public void operationFailed(Object ctx, PubSubException exception) {
channel.write(PubSubResponseUtils.getResponseForException(exception, request.getTxnId()));
pubStats.incrementFailedOps();
}
@Override
public void operationFinished(Object ctx, PubSubProtocol.MessageSeqId resultOfOperation) {
channel.write(getSuccessResponse(request.getTxnId(), resultOfOperation));
pubStats.updateLatency(MathUtils.now() - requestTime);
}
}, null);
persistenceMgr.persistMessage(persistRequest);
}
private static PubSubProtocol.PubSubResponse getSuccessResponse(long txnId, PubSubProtocol.MessageSeqId publishedMessageSeqId) {
if (null == publishedMessageSeqId) {
return PubSubResponseUtils.getSuccessResponse(txnId);
}
PubSubProtocol.PublishResponse publishResponse = PubSubProtocol.PublishResponse.newBuilder().setPublishedMsgId(publishedMessageSeqId).build();
PubSubProtocol.ResponseBody responseBody = PubSubProtocol.ResponseBody.newBuilder().setPublishResponse(publishResponse).build();
return PubSubProtocol.PubSubResponse.newBuilder().
setProtocolVersion(PubSubResponseUtils.serverVersion).
setStatusCode(PubSubProtocol.StatusCode.SUCCESS).setTxnId(txnId).
setResponseBody(responseBody).build();
}
}