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 org.apache.asterix.replication.logging;
  
  import java.nio.ByteBuffer;
  import java.util.concurrent.LinkedBlockingQueue;
  
  import org.apache.asterix.common.api.INcApplicationContext;
  import org.apache.asterix.common.transactions.ILogManager;
  import org.apache.asterix.common.transactions.ILogRecord;
  import org.apache.asterix.common.transactions.ILogRequester;
  import org.apache.asterix.common.transactions.LogSource;
  import org.apache.asterix.common.transactions.LogType;
  import org.apache.asterix.common.utils.TransactionUtil;
  import org.apache.asterix.replication.api.IReplicationWorker;
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  
  public class RemoteLogsProcessor implements ILogRequester {
  
      private static final Logger LOGGER = LogManager.getLogger();
      private final LinkedBlockingQueue<RemoteLogRecord> remoteLogsQ;
      private final ILogManager logManager;
  
      public RemoteLogsProcessor(INcApplicationContext appCtx) {
          logManager = appCtx.getTransactionSubsystem().getLogManager();
          remoteLogsQ = new LinkedBlockingQueue<>();
          appCtx.getThreadExecutor().execute(new RemoteLogsNotifier(appCtx, remoteLogsQ));
      }
  
      public void process(ByteBuffer logsBatch, RemoteLogRecord reusableLog, IReplicationWorker worker) {
          while (logsBatch.hasRemaining()) {
              // get rid of log size
              logsBatch.getInt();
              reusableLog.readRemoteLog(logsBatch);
              reusableLog.setLogSource(LogSource.REMOTE);
              switch (reusableLog.getLogType()) {
                  case LogType.UPDATE:
                  case LogType.ENTITY_COMMIT:
                  case LogType.FILTER:
                      logManager.log(reusableLog);
                      break;
                  case LogType.JOB_COMMIT:
                  case LogType.ABORT:
                      RemoteLogRecord jobTerminationLog = new RemoteLogRecord();
                      TransactionUtil.formJobTerminateLogRecord(jobTerminationLog, reusableLog.getTxnId(),
                              reusableLog.getLogType() == LogType.JOB_COMMIT);
                      jobTerminationLog.setRequester(this);
                      jobTerminationLog.setReplicationWorker(worker);
                      jobTerminationLog.setLogSource(LogSource.REMOTE);
                      logManager.log(jobTerminationLog);
                      break;
                  case LogType.FLUSH:
                      RemoteLogRecord flushLog = new RemoteLogRecord();
                      TransactionUtil.formFlushLogRecord(flushLog, reusableLog.getDatasetId(),
                              reusableLog.getResourcePartition(), reusableLog.getFlushingComponentMinId(),
                              reusableLog.getFlushingComponentMaxId(), null);
                      flushLog.setRequester(this);
                      flushLog.setLogSource(LogSource.REMOTE);
                      flushLog.setMasterLsn(reusableLog.getLSN());
                      logManager.log(flushLog);
                      break;
                  default:
                      LOGGER.error(() -> "Unsupported LogType: " + reusableLog.getLogType());
              }
          }
      }
  
      @Override
      public void notifyFlushed(ILogRecord logRecord) {
          remoteLogsQ.add((RemoteLogRecord) logRecord);
      }
  }
  