/*************************************************************************
* Copyright 2009-2012 Eucalyptus Systems, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 3 of the License.
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*
* Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
* CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
* additional information or have any questions.
*
* This file may incorporate work covered under the following copyright
* and permission notice:
*
* Software License Agreement (BSD License)
*
* Copyright (c) 2008, Regents of the University of California
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************************************************************************/
package com.eucalyptus.objectstorage.msgs;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.log4j.Logger;
// A concurrent hash map that holds a map of queues, which can be used for passing data
// Currently, the queues are a ObjectStorageDataQueue and producers/consumers do not timeout.
public class ObjectStorageDataMessenger {
private static Logger LOG = Logger.getLogger(ObjectStorageDataMessenger.class);
private static final int DATA_QUEUE_SIZE = 3;
private ConcurrentHashMap<String, ConcurrentHashMap<String, ObjectStorageDataQueue<ObjectStorageDataMessage>>> queueMap;
private ConcurrentHashMap<String, ObjectStorageMonitor> monitorMap;
public ObjectStorageDataMessenger() {
queueMap = new ConcurrentHashMap<String, ConcurrentHashMap<String, ObjectStorageDataQueue<ObjectStorageDataMessage>>>();
monitorMap = new ConcurrentHashMap<String, ObjectStorageMonitor>();
}
public ObjectStorageDataQueue<ObjectStorageDataMessage> getQueue(String key1, String key2) {
ConcurrentHashMap<String, ObjectStorageDataQueue<ObjectStorageDataMessage>> queues =
queueMap.putIfAbsent(key1, new ConcurrentHashMap<String, ObjectStorageDataQueue<ObjectStorageDataMessage>>());
if (queues == null) {
queues = queueMap.get(key1);
}
ObjectStorageDataQueue<ObjectStorageDataMessage> queue =
queues.putIfAbsent(key2, new ObjectStorageDataQueue<ObjectStorageDataMessage>(DATA_QUEUE_SIZE));
if (queue == null) {
queue = queues.get(key2);
}
return queue;
}
public ObjectStorageDataQueue<ObjectStorageDataMessage> interruptAllAndGetQueue(String key1, String key2) {
ConcurrentHashMap<String, ObjectStorageDataQueue<ObjectStorageDataMessage>> queues = queueMap.get(key1);
if (queues != null) {
for (ObjectStorageDataQueue<ObjectStorageDataMessage> queue : queues.values()) {
queue.setInterrupted(true);
}
}
return getQueue(key1, key2);
}
public void clearQueues(String key1) {
ConcurrentHashMap<String, ObjectStorageDataQueue<ObjectStorageDataMessage>> queues = queueMap.get(key1);
if (queues != null) {
for (ObjectStorageDataQueue<ObjectStorageDataMessage> queue : queues.values()) {
queue.setInterrupted(false);
}
}
}
public void removeQueue(String key1, String key2) {
if (queueMap.containsKey(key1)) {
ConcurrentHashMap<String, ObjectStorageDataQueue<ObjectStorageDataMessage>> queues = queueMap.get(key1);
if (queues.containsKey(key2)) {
queues.remove(key2);
synchronized (queues) {
if (queues.size() == 0) {
queueMap.remove(key1);
}
}
}
}
}
public ObjectStorageMonitor getMonitor(String key) {
ObjectStorageMonitor monitor = monitorMap.putIfAbsent(key, new ObjectStorageMonitor());
if (monitor == null) {
monitor = monitorMap.get(key);
}
return monitor;
}
public void removeMonitor(String key) {
if (monitorMap.containsKey(key)) {
monitorMap.remove(key);
}
}
}