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/*
 * Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
 *
 * Licensed 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. See accompanying
 * LICENSE file.
 */

package com.gemstone.gemfire.internal.cache;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.Set;

import com.gemstone.gemfire.DataSerializer;
import com.gemstone.gemfire.distributed.DistributedMember;
import com.gemstone.gemfire.distributed.internal.DM;
import com.gemstone.gemfire.distributed.internal.DistributionManager;
import com.gemstone.gemfire.distributed.internal.InternalDistributedSystem;
import com.gemstone.gemfire.distributed.internal.ReplyProcessor21;
import com.gemstone.gemfire.internal.cache.delta.Delta;

/**
 * This message is to cleanup a {@link TXEntryState} by releasing the lock and
 * reverting the pending value.
 * 
 * @author swale
 * @since 7.0
 */
public final class TXCleanupEntryMessage extends TXMessage {

  private String regionPath;

  private Object regionKey;

  private byte op;

  private byte destroy;

  private boolean bulkOp;

  private Object originalValue;

  private Delta originalDelta;

  /** for serialization */
  public TXCleanupEntryMessage() {
  }

  private TXCleanupEntryMessage(final TXStateInterface tx,
      final ReplyProcessor21 processor, final String regionPath,
      final Object regionKey, final byte originalOp,
      final byte originalDestroy, final boolean originalBulkOp,
      final Object originalValue, final Delta originalDelta) {
    super(tx, processor);
    this.regionPath = regionPath;
    this.regionKey = regionKey;
    this.op = originalOp;
    this.destroy = originalDestroy;
    this.bulkOp = originalBulkOp;
    this.originalValue = originalValue;
    this.originalDelta = originalDelta;
  }

  public static ReplyProcessor21 send(final InternalDistributedSystem system,
      final DM dm, final TXStateInterface txState,
      final Set recipients, final LocalRegion dataRegion,
      final Object regionKey, final byte originalOp,
      final byte originalDestroy, final boolean originalBulkOp,
      final Object originalValue, final Delta originalDelta) {
    final ReplyProcessor21 response = new ReplyProcessor21(system, recipients);
    final TXCleanupEntryMessage msg = new TXCleanupEntryMessage(txState,
        response, dataRegion.getFullPath(), regionKey, originalOp,
        originalDestroy, originalBulkOp, originalValue, originalDelta);
    msg.setRecipients(recipients);
    dm.putOutgoing(msg);
    return response;
  }

  /**
   * @see TXMessage#operateOnTX(TXStateProxy, DistributionManager)
   */
  @Override
  protected boolean operateOnTX(final TXStateProxy tx, DistributionManager dm) {
    final TXState txState;
    // if no TXState was created (e.g. due to only getEntry/size operations
    // that don't start remote TX) then ignore
    if (tx != null && (txState = tx.getLocalTXState()) != null) {
      final GemFireCacheImpl cache = GemFireCacheImpl.getInstance();
      if (cache != null && !cache.isClosed()
          && cache.getCancelCriterion().cancelInProgress() == null) {
        final LocalRegion dataRegion = cache
            .getRegionByPathForProcessing(this.regionPath);
        if (dataRegion != null) {
          txState.revertFailedOp(dataRegion, this.regionKey, this.op,
              this.destroy, this.bulkOp, this.originalValue,
              this.originalDelta);
        }
      }
    }
    return true;
  }

  public int getDSFID() {
    return TX_CLEANUP_ENTRY_MESSAGE;
  }

  @Override
  public void toData(DataOutput out)
          throws IOException {
    super.toData(out);
    DataSerializer.writeString(this.regionPath, out);
    DataSerializer.writeObject(this.regionKey, out);
    out.writeByte(this.op);
    out.writeByte(this.destroy);
    out.writeBoolean(this.bulkOp);
    DataSerializer.writeObject(this.originalValue, out);
    DataSerializer.writeObject(this.originalDelta, out);
  }

  @Override
  public void fromData(DataInput in)
          throws IOException, ClassNotFoundException {
    super.fromData(in);
    this.regionPath = DataSerializer.readString(in);
    this.regionKey = DataSerializer.readObject(in);
    this.op = in.readByte();
    this.destroy = in.readByte();
    this.bulkOp = in.readBoolean();
    this.originalValue = DataSerializer.readObject(in);
    this.originalDelta = DataSerializer.readObject(in);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected short computeCompressedShort(short flags) {
    return flags;
  }

  /**
   * @see AbstractOperationMessage#appendFields(StringBuilder)
   */
  @Override
  protected void appendFields(StringBuilder sb) {
    sb.append("; regionPath=").append(this.regionPath);
    sb.append("; regionKey=").append(this.regionKey);
    sb.append("; op=").append(this.op);
    sb.append("; destroy=").append(this.destroy);
    sb.append("; bulkOp=").append(this.bulkOp);
    sb.append("; originalValue=").append(this.originalValue);
    sb.append("; originalDelta=").append(this.originalDelta);
  }
}