/*
* Copyright (C) 1999-2009 Jive Software. 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.
*/
package org.jivesoftware.openfire.plugin.util.cluster;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.io.Serializable;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.ResourceBundle;
import org.jivesoftware.openfire.cluster.NodeID;
import org.jivesoftware.util.cache.CacheFactory;
import org.jivesoftware.util.cache.ClusterTask;
import org.jivesoftware.util.cache.ExternalizableUtil;
/**
* A utility class which helps to gather Hazelcast stats and information.
*/
public class NodeRuntimeStats {
// This properties file is located in the Hazelcast JAR
private static final ResourceBundle config = ResourceBundle.getBundle("hazelcast-runtime");
public static String getProviderConfig(String key) {
return config.getString(key);
}
/**
* Returns a Map of HazelcastRuntimeStats.NodeInfo objects keyed by cluster Member objects.
* A NodeInfo object is a collection of various Node stats.
*
* @return a Map of NodeInfo objects.
*/
public static Map<NodeID, NodeInfo> getNodeInfo() {
// Run cluster-wide stats query
Collection<Object> taskResult = CacheFactory.doSynchronousClusterTask(new NodeInfoTask(), true);
Map<NodeID, NodeInfo> result = new HashMap<NodeID, NodeInfo>();
for (Object tr : taskResult) {
NodeInfo nodeInfo = (NodeInfo) tr;
NodeID nodeId = NodeID.getInstance(nodeInfo.getNodeId());
result.put(nodeId, nodeInfo);
}
return result;
}
/**
* Clears the cache stats.
*/
public static void clearCacheStats() {
// not supported
}
/**
* Encapsulates statistics and information about a cluster node.
*/
public static class NodeInfoTask implements ClusterTask<NodeInfo> {
private NodeInfo result = null;
public void run() {
// Get runtime stats - mem and time:
Runtime runtime = Runtime.getRuntime();
long free = runtime.freeMemory();
long total = runtime.totalMemory();
long max = runtime.maxMemory();
long time = System.currentTimeMillis();
result = new NodeInfo(CacheFactory.getClusterMemberID(), free, total, max, time);
}
public void writeExternal(ObjectOutput out) throws IOException {
ExternalizableUtil.getInstance().writeSerializable(out, (NodeInfo) result);
}
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
result = (NodeInfo) ExternalizableUtil.getInstance().readSerializable(in);
}
public NodeInfo getResult() { return result; }
}
/**
* Encapsulates statistics and information about a cluster node.
*/
public static class NodeInfo implements Serializable {
private byte[] nodeId;
private long freeMem;
private long totalMem;
private long maxMem;
private long time;
NodeInfo(byte[] nodeId, long freeMem, long totalMem, long maxMem, long time)
{
this.nodeId = nodeId;
this.freeMem = freeMem;
this.totalMem = totalMem;
this.maxMem = maxMem;
this.time = time;
}
/**
* Returns the amount of free memory in the cluster node's VM (in bytes).
*
* @return the amount of free memory on the cluster node.
*/
public byte[] getNodeId() {
return nodeId;
}
/**
* Returns the amount of free memory in the cluster node's VM (in bytes).
*
* @return the amount of free memory on the cluster node.
*/
public long getFreeMem() {
return freeMem;
}
/**
* Returns the total amount of memory in the cluster node's VM (in bytes).
*
* @return the total amount of memory on the cluster node.
*/
public long getTotalMem() {
return totalMem;
}
/**
* Returns the max amount of memory in the cluster node's VM (in bytes).
*
* @return the max amount of memory on the cluster node.
*/
public long getMaxMem() {
return maxMem;
}
/**
* Returns the current time on the cluster node in long format. This is useful
* monitoring information for applications that require the local times of each
* cluster member be to roughly in-synch (on top of the standard Hazelcast
* cluster time).<p>
*
* This value will always be somewhat inaccurate due to network delays, etc, so
* should only be taken as an approximate value.
*
* @return the local time of the cluster node.
*/
public long getTime() {
return time;
}
}
}