/*
 * 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.internal.cache.tier.sockets.command;

import org.apache.geode.cache.client.internal.DestroyOp;
import org.apache.geode.cache.client.internal.InvalidateOp;
import org.apache.geode.internal.cache.PartitionedRegion;
import org.apache.geode.internal.cache.tier.Command;
import org.apache.geode.internal.cache.tier.MessageType;
import org.apache.geode.internal.cache.tier.sockets.Message;
import org.apache.geode.internal.cache.tier.sockets.ServerConnection;
import org.apache.geode.internal.cache.versions.VersionTag;

import java.io.IOException;

/**
 *
 */
public class Invalidate70 extends Invalidate {

  private final static Invalidate70 singleton = new Invalidate70();

  public static Command getCommand() {
    return singleton;
  }

  private Invalidate70() {}

  @Override
  protected void writeReplyWithRefreshMetadata(Message origMsg, ServerConnection servConn,
      PartitionedRegion pr, byte nwHop, VersionTag versionTag) throws IOException {
    Message replyMsg = servConn.getReplyMessage();
    servConn.getCache().getCancelCriterion().checkCancelInProgress(null);
    replyMsg.setMessageType(MessageType.REPLY);
    int flags = 0;
    int numParts = 2;
    if (versionTag != null) {
      flags |= InvalidateOp.HAS_VERSION_TAG;
      numParts++;
    }
    replyMsg.setNumberOfParts(numParts);
    replyMsg.setTransactionId(origMsg.getTransactionId());
    replyMsg.addIntPart(flags);
    if (versionTag != null) {
      replyMsg.addObjPart(versionTag);
    }
    replyMsg.addBytesPart(new byte[] {pr.getMetadataVersion(), nwHop});
    pr.getPrStats().incPRMetaDataSentCount();
    replyMsg.send(servConn);
    if (logger.isTraceEnabled()) {
      logger.trace("{}: rpl with REFRESH_METADAT tx: {}", servConn.getName(),
          origMsg.getTransactionId());
    }
  }

  @Override
  protected void writeReply(Message origMsg, ServerConnection servConn, VersionTag versionTag)
      throws IOException {
    Message replyMsg = servConn.getReplyMessage();
    servConn.getCache().getCancelCriterion().checkCancelInProgress(null);
    replyMsg.setMessageType(MessageType.REPLY);
    int flags = 0;
    int numParts = 2;
    if (versionTag != null) {
      flags |= DestroyOp.HAS_VERSION_TAG;
      numParts++;
    }
    replyMsg.setNumberOfParts(numParts);
    replyMsg.setTransactionId(origMsg.getTransactionId());
    replyMsg.addIntPart(flags);
    if (versionTag != null) {
      if (logger.isDebugEnabled()) {
        logger.debug("wrote version tag in response: {}", versionTag);
      }
      replyMsg.addObjPart(versionTag);
    } else {
      if (logger.isDebugEnabled()) {
        logger.debug("response has no version tag");
      }
    }
    replyMsg.addBytesPart(OK_BYTES); // make old single-hop code happy by putting byte[]{0} here
    replyMsg.send(servConn);
    if (logger.isTraceEnabled()) {
      logger.trace("{}: rpl tx: {} parts={}", servConn.getName(), origMsg.getTransactionId(),
          replyMsg.getNumberOfParts());
    }
  }
}