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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.tier.sockets.command;

import java.io.IOException;
import java.nio.ByteBuffer;

import com.gemstone.gemfire.InvalidDeltaException;
import com.gemstone.gemfire.cache.DynamicRegionFactory;
import com.gemstone.gemfire.cache.RegionDestroyedException;
import com.gemstone.gemfire.cache.ResourceException;
import com.gemstone.gemfire.cache.operations.PutOperationContext;
import com.gemstone.gemfire.distributed.internal.DistributionStats;
import com.gemstone.gemfire.internal.cache.EntryEventImpl;
import com.gemstone.gemfire.internal.cache.EventID;
import com.gemstone.gemfire.internal.cache.LocalRegion;
import com.gemstone.gemfire.internal.cache.PartitionedRegion;
import com.gemstone.gemfire.internal.cache.tier.CachedRegionHelper;
import com.gemstone.gemfire.internal.cache.tier.Command;
import com.gemstone.gemfire.internal.cache.tier.MessageType;
import com.gemstone.gemfire.internal.cache.tier.sockets.BaseCommand;
import com.gemstone.gemfire.internal.cache.tier.sockets.CacheServerStats;
import com.gemstone.gemfire.internal.cache.tier.sockets.Message;
import com.gemstone.gemfire.internal.cache.tier.sockets.Part;
import com.gemstone.gemfire.internal.cache.tier.sockets.ServerConnection;
import com.gemstone.gemfire.internal.i18n.LocalizedStrings;
import com.gemstone.gemfire.internal.security.AuthorizeRequest;
import com.gemstone.gemfire.security.GemFireSecurityException;

/**
 * @since 6.1 
 */
public class Put61 extends BaseCommand {

  private final static Put61 singleton = new Put61();

  public static Command getCommand() {
    return singleton;
  }

  private Put61() {
  }

  @Override
  public void cmdExecute(Message msg, ServerConnection servConn, long p_start)
      throws IOException, InterruptedException {
    long start = p_start;
    Part regionNamePart = null, keyPart = null, valuePart = null, callbackArgPart = null;
    String regionName = null;
    Object callbackArg = null, key = null;
    Part eventPart = null;
    boolean isDelta = false;
    CachedRegionHelper crHelper = servConn.getCachedRegionHelper();
    CacheServerStats stats = servConn.getCacheServerStats();
    if (crHelper.emulateSlowServer() > 0) {
      boolean interrupted = Thread.interrupted();
      try {
        Thread.sleep(crHelper.emulateSlowServer());
      }
      catch (InterruptedException ugh) {
        interrupted = true;
      }
      finally {
        if (interrupted) {
          Thread.currentThread().interrupt();
        }
      }
    }

    // requiresResponse = true;
    servConn.setAsTrue(REQUIRES_RESPONSE);
    {
      long oldStart = start;
      start = DistributionStats.getStatTime();
      stats.incReadPutRequestTime(start - oldStart);
    }
    // Retrieve the data from the message parts
    regionNamePart = msg.getPart(0);
    keyPart = msg.getPart(1);
    try {
      isDelta = (Boolean)msg.getPart(2).getObject();
    }
    catch (Exception e) {
      writeException(msg, MessageType.PUT_DELTA_ERROR, e, false, servConn);
      servConn.setAsTrue(RESPONDED);
      // CachePerfStats not available here.
      return;
    }
    valuePart = msg.getPart(3);
    eventPart = msg.getPart(4);
    if (msg.getNumberOfParts() > 5) {
      callbackArgPart = msg.getPart(5);
      try {
        callbackArg = callbackArgPart.getObject();
      }
      catch (Exception e) {
        writeException(msg, e, false, servConn);
        servConn.setAsTrue(RESPONDED);
        return;
      }
    }
    regionName = regionNamePart.getString();

    try {
      key = keyPart.getStringOrObject();
    }
    catch (Exception e) {
      writeException(msg, e, false, servConn);
      servConn.setAsTrue(RESPONDED);
      return;
    }

    if (logger.fineEnabled()) {
      logger.fine(servConn.getName() + ": Received 6.1"
          + (isDelta ? " delta " : " ") + "put request ("
          + msg.getPayloadLength() + " bytes) from "
          + servConn.getSocketString() + " for region " + regionName + " key "
          + key);
    }

    // Process the put request
    if (key == null || regionName == null) {
      StringBuilder errMessage = new StringBuilder();
      if (key == null) {
        String putMsg = " The input key for the 6.1 put request is null";
        if (logger.warningEnabled())
          logger.fine(servConn.getName() + ":" + putMsg);
        errMessage.append(putMsg);
      }
      if (regionName == null) {
        String putMsg = " The input region name for the 6.1 put request is null";
        if (logger.warningEnabled())
          logger.fine(servConn.getName() + ":" + putMsg);
        errMessage.append(putMsg);
      }
      writeErrorResponse(msg, MessageType.PUT_DATA_ERROR,
          errMessage.toString(), servConn);
      servConn.setAsTrue(RESPONDED);
    }
    else {
      LocalRegion region = (LocalRegion)crHelper.getRegion(regionName);
      if (region == null) {
        String reason = " was not found during 6.1 put request";
        writeRegionDestroyedEx(msg, regionName, reason, servConn);
        servConn.setAsTrue(RESPONDED);
      }
      else if (valuePart.isNull() && region.containsKey(key)) {
        // Invalid to 'put' a null value in an existing key
        String putMsg = " Attempted to 6.1 put a null value for existing key "
            + key;
        if (logger.infoEnabled())
          logger.fine(servConn.getName() + ":" + putMsg);
        StringBuilder errMessage = new StringBuilder();
        errMessage.append(putMsg);
        writeErrorResponse(msg, MessageType.PUT_DATA_ERROR, errMessage
            .toString(), servConn);
        servConn.setAsTrue(RESPONDED);
      }
      else {
        // try {
        // this.eventId = (EventID)eventPart.getObject();
        ByteBuffer eventIdPartsBuffer = ByteBuffer.wrap(eventPart
            .getSerializedForm());
        long threadId = EventID
            .readEventIdPartsFromOptmizedByteArray(eventIdPartsBuffer);
        long sequenceId = EventID
            .readEventIdPartsFromOptmizedByteArray(eventIdPartsBuffer);
        EventID eventId = new EventID(servConn.getEventMemberIDByteArray(),
            threadId, sequenceId);

        try {
          Object value = null;
          if (!isDelta) {
            value = valuePart.getSerializedForm();
          } 
          boolean isObject = valuePart.isObject();
          boolean isMetaRegion = region.isUsedForMetaRegion();
          msg.setMetaRegion(isMetaRegion);
          AuthorizeRequest authzRequest = null;
          if (!isMetaRegion) {
            authzRequest = servConn.getAuthzRequest();
          }
          if (authzRequest != null) {
            // TODO SW: This is to handle DynamicRegionFactory create
            // calls. Rework this when the semantics of DynamicRegionFactory are
            // cleaned up.
            if (DynamicRegionFactory.regionIsDynamicRegionList(regionName)) {
              authzRequest.createRegionAuthorize((String)key);
            }
            // Allow PUT operations on meta regions (bug #38961)
            else {
              PutOperationContext putContext = authzRequest.putAuthorize(
                  regionName, key, value, isObject, callbackArg);
              value = putContext.getValue();
              isObject = putContext.isObject();
              callbackArg = putContext.getCallbackArg();
            }
          }
          // If the value is 1 byte and the byte represents null,
          // attempt to create the entry. This test needs to be
          // moved to DataSerializer or DataSerializer.NULL needs
          // to be publicly accessible.
          boolean result = false;
          if (value == null && !isDelta) {
            // Create the null entry. Since the value is null, the value of the
            // isObject
            // the true after null doesn't matter and is not used.
            result = region.basicBridgeCreate(key, null, true, callbackArg,
                servConn.getProxyID(), true, new EntryEventImpl(eventId), false);
          }
          else {
            // Put the entry
            byte[] delta = null;
            if (isDelta) {
              delta = valuePart.getSerializedForm();              
            }
            result = region.basicBridgePut(key, value, delta, isObject,
                callbackArg, servConn.getProxyID(), true,
                servConn.isGemFireXDSystem(), new EntryEventImpl(eventId));
          }
          if (result) {
            servConn.setModificationInfo(true, regionName, key);
          }
          else {
            String message = servConn.getName()
                + ": Failed to 6.1 put entry for region " + regionName
                + " key " + key + " value " + valuePart;
            if (logger.infoEnabled())
              logger.fine(message);
            throw new Exception(message);
          }
        }
        catch (RegionDestroyedException rde) {
          writeException(msg, rde, false, servConn);
          servConn.setAsTrue(RESPONDED);
          return;
        }
        catch (ResourceException re) {
          writeException(msg, re, false, servConn);
          servConn.setAsTrue(RESPONDED);
          return;
        }
        catch (InvalidDeltaException ide) {
          if (logger.infoEnabled()) {
            logger
                .info(
                    LocalizedStrings.UpdateOperation_ERROR_APPLYING_DELTA_FOR_KEY_0_OF_REGION_1,
                    new Object[] { key, regionName });
          }
          writeException(msg, MessageType.PUT_DELTA_ERROR, ide, false, servConn);
          servConn.setAsTrue(RESPONDED);
          region.getCachePerfStats().incDeltaFullValuesRequested();
          return;

        }
        catch (Exception ce) {
          // If an interrupted exception is thrown , rethrow it
          checkForInterrupt(servConn, ce);

          // If an exception occurs during the put, preserve the connection
          writeException(msg, ce, false, servConn);
          servConn.setAsTrue(RESPONDED);
          if (ce instanceof GemFireSecurityException) {
            // Fine logging for security exceptions since these are already
            // logged by the security logger
            if (logger.fineEnabled()) {
              logger.fine(servConn.getName()
                  + ": Unexpected Security exception", ce);
            }
          }
          else if (logger.warningEnabled()) {
            logger.fine(servConn.getName() + ": Unexpected Exception", ce);
          }
          return;
        }
        finally {
          long oldStart = start;
          start = DistributionStats.getStatTime();
          stats.incProcessPutTime(start - oldStart);
        }

        // Increment statistics and write the reply
        if (region instanceof PartitionedRegion) {
          PartitionedRegion pr = (PartitionedRegion)region;
          if (pr.isNetworkHop() != (byte)0) {
            writeReplyWithRefreshMetadata(msg, servConn,pr,pr.isNetworkHop());
            pr.setIsNetworkHop((byte)0);
            pr.setMetadataVersion(Byte.valueOf((byte)0));
          }
          else {
            writeReply(msg, servConn);
          }
        }
        else {
          writeReply(msg, servConn);
        }
        servConn.setAsTrue(RESPONDED);
        if (logger.fineEnabled()) {
          logger.fine(servConn.getName() + ": Sent 6.1 put response back to "
              + servConn.getSocketString() + " for region " + regionName
              + " key " + key + " value " + valuePart);
        }
        stats.incWritePutResponseTime(DistributionStats.getStatTime() - start);
      }
    }

  }

}




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