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A client library for memcached.
There is a newer version: 2.12.3
/**
 * Copyright (C) 2006-2009 Dustin Sallings
 * Copyright (C) 2009-2011 Couchbase, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALING
 * IN THE SOFTWARE.
 */

package net.spy.memcached.protocol.binary;

import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import net.spy.memcached.MemcachedNode;
import net.spy.memcached.ops.KeyedOperation;
import net.spy.memcached.ops.OperationCallback;
import net.spy.memcached.ops.VBucketAware;
import net.spy.memcached.util.StringUtils;

/**
 * Binary operations that contain multiple keys and are VBucket aware operations
 * should extend this class.
 */
abstract class MultiKeyOperationImpl extends OperationImpl implements
  VBucketAware, KeyedOperation {
  protected final Map vbmap;

  protected MultiKeyOperationImpl(byte c, int o, OperationCallback cb) {
    super(c, o, cb);
    vbmap = Collections.synchronizedMap(new HashMap());
  }

  public Collection getKeys() {
    return vbmap.keySet();
  }

  public Collection getNotMyVbucketNodes() {
    return notMyVbucketNodes;
  }

  public void addNotMyVbucketNode(MemcachedNode node) {
    notMyVbucketNodes.add(node);
  }

  public void setNotMyVbucketNodes(Collection nodes) {
    notMyVbucketNodes = nodes;
  }

  public void setVBucket(String k, short vb) {
    assert vbmap.containsKey(k) : "Key " + k + " not contained in operation";
    vbmap.put(k, Short.valueOf(vb));
  }

  public short getVBucket(String k) {
    assert vbmap.containsKey(k) : "Key " + k + " not contained in operation";
    return vbmap.get(k);
  }

  @Override
  public String toString() {
    synchronized (vbmap) {
      return super.toString() + " Keys: " + StringUtils.join(getKeys(), " ");
    }
  }
}