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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.internal.cache.tx;

import org.apache.geode.cache.EntryExistsException;
import org.apache.geode.cache.EntryNotFoundException;
import org.apache.geode.cache.Operation;
import org.apache.geode.cache.Region.Entry;
import org.apache.geode.cache.UnsupportedOperationInTransactionException;
import org.apache.geode.cache.client.ServerOperationException;
import org.apache.geode.cache.client.internal.ServerRegionDataAccess;
import org.apache.geode.internal.cache.DistributedPutAllOperation;
import org.apache.geode.internal.cache.DistributedRemoveAllOperation;
import org.apache.geode.internal.cache.EntryEventImpl;
import org.apache.geode.internal.cache.KeyInfo;
import org.apache.geode.internal.cache.LocalRegion;
import org.apache.geode.internal.cache.tier.sockets.ClientProxyMembershipID;
import org.apache.geode.internal.cache.tier.sockets.VersionedObjectList;

import java.util.Set;

public class ClientTXRegionStub implements TXRegionStub {

  // private final LocalRegion region;
  private final ServerRegionDataAccess proxy;

  public ClientTXRegionStub(LocalRegion region) {
    // this.region = region;
    this.proxy = region.getServerProxy();
  }


  public boolean containsKey(KeyInfo keyInfo) {
    return proxy.containsKey(keyInfo.getKey());
  }


  public boolean containsValueForKey(KeyInfo keyInfo) {
    return proxy.containsValueForKey(keyInfo.getKey());
  }


  public void destroyExistingEntry(EntryEventImpl event, boolean cacheWrite,
      Object expectedOldValue) {
    if (event.getOperation().isLocal()) {
      throw new UnsupportedOperationInTransactionException();
    }
    Object result = proxy.destroy(event.getKey(), expectedOldValue, event.getOperation(), event,
        event.getCallbackArgument());
    if (result instanceof EntryNotFoundException) {
      throw (EntryNotFoundException) result;
    }

  }


  public Object findObject(KeyInfo keyInfo, boolean isCreate, boolean generateCallbacks,
      Object value, boolean preferCD, ClientProxyMembershipID requestingClient,
      EntryEventImpl event) {
    return proxy.get(keyInfo.getKey(), keyInfo.getCallbackArg(), event);
  }


  public Entry getEntry(KeyInfo keyInfo, boolean allowTombstones) {
    return proxy.getEntry(keyInfo.getKey());
  }


  public Object getEntryForIterator(KeyInfo keyInfo, boolean allowTombstones) {
    return getEntry(keyInfo, allowTombstones);
  }


  public void invalidateExistingEntry(EntryEventImpl event, boolean invokeCallbacks,
      boolean forceNewEntry) {
    if (event.getOperation().isLocal()) {
      throw new UnsupportedOperationInTransactionException();
    }
    proxy.invalidate(event);

  }


  public boolean putEntry(EntryEventImpl event, boolean ifNew, boolean ifOld,
      Object expectedOldValue, boolean requireOldValue, long lastModified,
      boolean overwriteDestroyed) {
    if (event.isBulkOpInProgress()) {
      // this is a put all, ignore this!
      return true;
    }
    Object result = null;
    try {
      result = proxy.put(event.getKey(), event.getRawNewValue(), event.getDeltaBytes(), event,
          event.getOperation(), requireOldValue, expectedOldValue, event.getCallbackArgument(),
          event.isCreate());
    } catch (ServerOperationException e) {
      if (e.getCause() != null && (e.getCause() instanceof EntryExistsException)) {
        throw (EntryExistsException) e.getCause();
      }
      throw e;
    }
    if (event.getOperation() == Operation.REPLACE) {
      if (!requireOldValue) { // replace(K,V,V)
        return ((Boolean) result).booleanValue();
      } else { // replace(K,V)
        event.setOldValue(result);
      }
    } else if (event.getOperation() == Operation.PUT_IF_ABSENT) {
      // if (logger.isDebugEnabled()) {
      // logger.debug("putIfAbsent for " + event.getKey() + " is returning " + result);
      // }
      event.setOldValue(result);
      if (result != null) {
        return false;
      }
    }
    return true;
  }


  public int entryCount() {
    return proxy.size();
  }


  public Set getRegionKeysForIteration(LocalRegion currRegion) {
    return proxy.keySet();
  }

  public void postPutAll(DistributedPutAllOperation putallOp, VersionedObjectList successfulPuts,
      LocalRegion r) {
    /*
     * Don't do anything here , it's handled in proxy and elsewhere.
     */
  }

  @Override
  public void postRemoveAll(DistributedRemoveAllOperation op, VersionedObjectList successfulOps,
      LocalRegion region) {
    // Don't do anything here , it's handled in proxy and elsewhere.
  }


  @Override
  public void cleanup() {}


}