com.gemstone.gemfire.admin.internal.FlushToDiskRequest Maven / Gradle / Ivy

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SnappyData store based off Pivotal GemFireXD
There is a newer version: 2.0-BETA
/*
 * 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.admin.internal;

import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

import com.gemstone.gemfire.CancelException;
import com.gemstone.gemfire.cache.persistence.PersistentID;
import com.gemstone.gemfire.distributed.internal.DM;
import com.gemstone.gemfire.distributed.internal.DistributionManager;
import com.gemstone.gemfire.distributed.internal.ReplyException;
import com.gemstone.gemfire.internal.admin.remote.AdminMultipleReplyProcessor;
import com.gemstone.gemfire.internal.admin.remote.AdminRequest;
import com.gemstone.gemfire.internal.admin.remote.AdminResponse;
import com.gemstone.gemfire.internal.cache.DiskStoreImpl;
import com.gemstone.gemfire.internal.cache.GemFireCacheImpl;

/**
 * A request to from an admin VM to all non admin members
 * to start a backup. In the prepare phase of the backup,
 * the members will suspend bucket destroys to make sure
 * buckets aren't missed during the backup.
 * 
 * @author dsmith
 *
 */
public class FlushToDiskRequest  extends AdminRequest {
  
  public FlushToDiskRequest() {
    
  }
  
  public static void send(DM dm, Set recipients) {
    FlushToDiskRequest request = new FlushToDiskRequest();
    request.setRecipients(recipients);

    FlushToDiskProcessor replyProcessor = new FlushToDiskProcessor(dm, recipients);
    request.msgId = replyProcessor.getProcessorId();
    dm.putOutgoing(request);
    try {
      replyProcessor.waitForReplies();
    } catch (ReplyException e) {
      if(!(e.getCause() instanceof CancelException)) {
        e.handleAsUnexpected();
      }
    } catch (InterruptedException e) {
      e.printStackTrace();
    }
    AdminResponse response = request.createResponse((DistributionManager)dm);
    response.setSender(dm.getDistributionManagerId());
    replyProcessor.process(response);
  }
  
  @Override
  protected AdminResponse createResponse(DistributionManager dm) {
    GemFireCacheImpl cache = GemFireCacheImpl.getInstance();
    HashSet persistentIds;
    if(cache != null) {
      Collection diskStores = cache.listDiskStoresIncludingRegionOwned();
      for(DiskStoreImpl store : diskStores) {
        store.flush();
      }
    }

    return new FlushToDiskResponse(this.getSender());
  }

  public int getDSFID() {
    return FLUSH_TO_DISK_REQUEST;
  }
  
  private static class FlushToDiskProcessor extends AdminMultipleReplyProcessor {
    public FlushToDiskProcessor(DM dm, Collection initMembers) {
      super(dm, initMembers);
    }
    
    @Override
    protected boolean stopBecauseOfExceptions() {
      return false;
    }
  }
}