com.gemstone.gemfire.internal.cache.DiskStoreBackup Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of gemfire-core Show documentation
SnappyData store based off Pivotal GemFireXD
The newest version!
/*
 * 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.File;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;

import com.gemstone.gemfire.internal.cache.persistence.BackupInspector;

/**
 * This class manages the state of the backup of an individual disk store. It
 * holds the list of oplogs that still need to be backed up, along with the
 * lists of oplog files that should be deleted when the oplog is backed up. See
 * {@link DiskStoreImpl#startBackup(File, BackupInspector, com.gemstone.gemfire.internal.cache.persistence.RestoreScript)}
 * 
 * @author dsmith
 * 
 */
public class DiskStoreBackup {
  
  private final Map> pendingBackup;
  private final Set deferredCrfDeletes = new HashSet();
  private final Set deferredDrfDeletes = new HashSet();
  private final File targetDir;
  
  public DiskStoreBackup(Map> allOplogs, File targetDir) {
    this.pendingBackup = allOplogs;
    this.targetDir = targetDir;
  }
  
  /**
   * Add the oplog to the list of deferred deletes.
   * @return true if the delete has been deferred. False if this
   * oplog should be deleted immediately.
   */
  public synchronized boolean deferCrfDelete(Oplog oplog) {
    if(pendingBackup.containsKey(oplog)) {
      deferredCrfDeletes.add(oplog);
      return true;
    }
    
    return false;
  }

  /**
   * Add the oplog to the list of deferred deletes.
   * @return true if the delete has been deferred. False if this
   * oplog should be deleted immediately.
   */
  public synchronized boolean deferDrfDelete(Oplog oplog) {
    if(pendingBackup.containsKey(oplog)) {
      deferredDrfDeletes.add(oplog);
      return true;
    }
    
    return false;
  }
  
  public synchronized Map> getPendingBackup() {
    return new LinkedHashMap>(pendingBackup);
  }
  
  public synchronized void backupFinished(Oplog oplog) {
    pendingBackup.remove(oplog);
    if(deferredCrfDeletes.remove(oplog)) {
      oplog.deleteCRFFileOnly();
    }
    if(deferredDrfDeletes.remove(oplog)) {
      oplog.deleteDRFFileOnly();
    }
  }
  
  public File getTargetDir() {
    return targetDir;
  }

  public synchronized void cleanup() {
    for(Oplog oplog: getPendingBackup().keySet()) {
      backupFinished(oplog);
    }
  }

}