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Apache Geode provides a database-like consistency model, reliable transaction processing and a shared-nothing architecture to maintain very low latency performance with high concurrency processing

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/*
 * 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.geode.cache.client.internal;

import org.apache.geode.internal.cache.tier.MessageType;
import org.apache.geode.internal.cache.tier.sockets.Message;
import org.apache.geode.internal.cache.tier.InterestType;

/**
 * Does a region unregisterInterest on a server
 * 
 * @since GemFire 5.7
 */
public class UnregisterInterestOp {
  /**
   * Does a region unregisterInterest on a server using connections from the given pool to
   * communicate with the server.
   * 
   * @param pool the pool to use to communicate with the server.
   * @param region the name of the region to do the unregisterInterest on
   * @param key describes what we are no longer interested in
   * @param interestType the {@link InterestType} for this unregister
   * @param isClosing true if this unregister is done by a close
   * @param keepAlive true if this unregister should not undo a durable registration
   */
  public static void execute(ExecutablePool pool, String region, Object key, int interestType,
      boolean isClosing, boolean keepAlive) {
    AbstractOp op = new UnregisterInterestOpImpl(region, key, interestType, isClosing, keepAlive);
    pool.executeOnAllQueueServers(op);
  }

  private UnregisterInterestOp() {
    // no instances allowed
  }

  private static class UnregisterInterestOpImpl extends AbstractOp {
    /**
     * @throws org.apache.geode.SerializationException if serialization fails
     */
    public UnregisterInterestOpImpl(String region, Object key, int interestType, boolean isClosing,
        boolean keepAlive) {
      super(MessageType.UNREGISTER_INTEREST, 5);
      getMessage().addStringPart(region);
      getMessage().addIntPart(interestType);
      getMessage().addStringOrObjPart(key);
      {
        byte closingByte = (byte) (isClosing ? 0x01 : 0x00);
        getMessage().addBytesPart(new byte[] {closingByte});
      }
      {
        byte keepAliveByte = (byte) (keepAlive ? 0x01 : 0x00);
        getMessage().addBytesPart(new byte[] {keepAliveByte});
      }
    }

    @Override
    protected Object processResponse(Message msg) throws Exception {
      processAck(msg, "unregisterInterest");
      return null;
    }

    @Override
    protected boolean isErrorResponse(int msgType) {
      return msgType == MessageType.UNREGISTER_INTEREST_DATA_ERROR;
    }

    @Override
    protected long startAttempt(ConnectionStats stats) {
      return stats.startUnregisterInterest();
    }

    @Override
    protected void endSendAttempt(ConnectionStats stats, long start) {
      stats.endUnregisterInterestSend(start, hasFailed());
    }

    @Override
    protected void endAttempt(ConnectionStats stats, long start) {
      stats.endUnregisterInterest(start, hasTimedOut(), hasFailed());
    }
  }
}