com.gemstone.gemfire.cache.hdfs.internal.hoplog.HDFSStoreDirector Maven / Gradle / Ivy

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TIBCO ComputeDB 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.cache.hdfs.internal.hoplog;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.concurrent.ConcurrentHashMap;


import com.gemstone.gemfire.cache.hdfs.internal.HDFSStoreImpl;

/**
 * HDFSStoreDirector is created for managing all instances of HDFSStoreImpl.    
 *
 * @author Hemant Bhanawat
 */
public final class HDFSStoreDirector {
  private final ConcurrentHashMap storeMap = new ConcurrentHashMap();

  // singleton instance
  private static volatile HDFSStoreDirector instance;
  
  private HDFSStoreDirector() {

  }
  
  public static final HDFSStoreDirector getInstance() {
    if (instance == null) {
      synchronized (HDFSStoreDirector.class)  {
        if (instance == null)
          instance = new HDFSStoreDirector();
      }
    }
    return instance;
  }

  // Called when the region is created.
  public final void addHDFSStore(HDFSStoreImpl hdfsStore){
    this.storeMap.put(hdfsStore.getName(), hdfsStore); 
  }
  
  public final HDFSStoreImpl getHDFSStore(String hdfsStoreName) {
    return this.storeMap.get(hdfsStoreName);
  }
  
  public final void removeHDFSStore(String hdfsStoreName) {
    this.storeMap.remove(hdfsStoreName);
  } 
  
  public void closeHDFSStores() {
    Iterator it = this.storeMap.values().iterator();
    while (it.hasNext()) {
      HDFSStoreImpl hsi = it.next();
      hsi.close();
    }
    this.storeMap.clear();
  }

   public ArrayList getAllHDFSStores() {
    ArrayList hdfsStores = new ArrayList();
    hdfsStores.addAll(this.storeMap.values());
    return hdfsStores;
  }
}