content: /**
   * 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 io.jafka.network.handlers;
  
  import static java.lang.String.format;
  
  import io.jafka.api.ProducerRequest;
  import io.jafka.api.RequestKeys;
  import io.jafka.log.ILog;
  import io.jafka.log.LogManager;
  import io.jafka.message.MessageAndOffset;
  import io.jafka.mx.BrokerTopicStat;
  import io.jafka.network.Receive;
  import io.jafka.network.Send;
  
  /**
   * handler for producer request
   * 
   * @author adyliu (imxylz@gmail.com)
   * @since 1.0
   */
  public class ProducerHandler extends AbstractHandler {
  
      final String errorFormat = "Error processing %s on %s:%d";
  
      public ProducerHandler(LogManager logManager) {
          super(logManager);
      }
  
      public Send handler(RequestKeys requestType, Receive receive) {
          final long st = System.currentTimeMillis();
          ProducerRequest request = ProducerRequest.readFrom(receive.buffer());
          if (logger.isDebugEnabled()) {
              logger.debug("Producer request " + request.toString());
          }
          handleProducerRequest(request);
          long et = System.currentTimeMillis();
          if (logger.isDebugEnabled()) {
              logger.debug("produce a message(set) cost " + (et - st) + " ms");
          }
          return null;
      }
  
      protected void handleProducerRequest(ProducerRequest request) {
          int partition = request.getTranslatedPartition(logManager);
          try {
              final ILog log = logManager.getOrCreateLog(request.topic, partition);
              log.append(request.messages);
              long messageSize = request.messages.getSizeInBytes();
              if (logger.isDebugEnabled()) {
                  logger.debug(messageSize + " bytes written to logs " + log);
                  for (MessageAndOffset m : request.messages) {
                      logger.trace("wrote message " + m.offset + " to disk");
                  }
              }
              BrokerTopicStat.getInstance(request.topic).recordBytesIn(messageSize);
              BrokerTopicStat.getBrokerAllTopicStat().recordBytesIn(messageSize);
          } catch (RuntimeException e) {
              if (logger.isDebugEnabled()) {
                  logger.error(format(errorFormat, request.getRequestKey(), request.topic, request.partition), e);
              } else {
                  logger.error("Producer failed. " + e.getMessage());
              }
              BrokerTopicStat.getInstance(request.topic).recordFailedProduceRequest();
              BrokerTopicStat.getBrokerAllTopicStat().recordFailedProduceRequest();
              throw e;
          } catch (Exception e) {
              if (logger.isDebugEnabled()) {
                  logger.error(format(errorFormat, request.getRequestKey(), request.topic, request.partition), e);
              } else {
                  logger.error("Producer failed. " + e.getMessage());
              }
              BrokerTopicStat.getInstance(request.topic).recordFailedProduceRequest();
              BrokerTopicStat.getBrokerAllTopicStat().recordFailedProduceRequest();
              throw new RuntimeException(e.getMessage(), e);
          }
      }
  }
  