/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.uima.ducc.agent.metrics.collectors;
import java.lang.management.ManagementFactory;
import java.lang.management.OperatingSystemMXBean;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import org.apache.uima.ducc.common.agent.metrics.memory.DuccNodeMemory;
import org.apache.uima.ducc.common.agent.metrics.memory.NodeMemory;
public class DefaultNodeMemoryCollector implements CallableMemoryCollector{
//private static final String TOTAL_MEMORY_SIZE="getTotalPhysicalMemorySize";
private static final String FREE_PHYSICAL_MEMORY_SIZE="getFreePhysicalMemorySize";
private static final String FREE_SWAP_MEMORY_SIZE="getFreeSwapSpaceSize";
private static final String TOTAL_SWAP_SPACE_SIZE="getTotalSwapSpaceSize";
private long fakeMemorySize = -1;
public DefaultNodeMemoryCollector() {
String tmp;
if ((tmp = System
.getProperty("ducc.agent.node.metrics.fake.memory.size")) != null) {
try {
fakeMemorySize = Long.parseLong(tmp);
} catch (NumberFormatException e) {
e.printStackTrace();
}
}
}
public NodeMemory call() throws Exception {
return collect();
}
private void setMetric(String metricName, long metricValue, DuccNodeMemory nodeMemory) {
try {
if ( fakeMemorySize != -1 ) {
nodeMemory.setMemTotal(fakeMemorySize);
} else {
nodeMemory.setMemTotal(Runtime.getRuntime().totalMemory());
}
} catch( Exception e) {
e.printStackTrace();
}
if ( metricName.equalsIgnoreCase(FREE_PHYSICAL_MEMORY_SIZE)) {
nodeMemory.setMemFree(metricValue);
} else if ( metricName.equalsIgnoreCase(FREE_SWAP_MEMORY_SIZE)) {
nodeMemory.setSwapFree(metricValue);
} else if ( metricName.equalsIgnoreCase(TOTAL_SWAP_SPACE_SIZE)) {
nodeMemory.setSwapTotal(metricValue);
}
}
private DuccNodeMemory collect() {
DuccNodeMemory nodeMemory = new DuccNodeMemory();
OperatingSystemMXBean operatingSystemMXBean = ManagementFactory.getOperatingSystemMXBean();
for (Method method : operatingSystemMXBean.getClass().getDeclaredMethods()) {
method.setAccessible(true);
if (method.getName().startsWith("get")
&& Modifier.isPublic(method.getModifiers())) {
Long value;
try {
value = (Long)method.invoke(operatingSystemMXBean);
} catch (Exception e) {
value = 0L;
} // try
setMetric(method.getName(), value, nodeMemory);
} // if
} // for
return nodeMemory;
}
public static void main(String[] args) {
try {
DefaultNodeMemoryCollector collector = new DefaultNodeMemoryCollector();
ExecutorService pool = Executors.newFixedThreadPool(1);
Future<NodeMemory> nmiFuture = pool.submit(collector);
NodeMemory nodeMemory = nmiFuture.get();
System.out.println("Total Memory:"+nodeMemory.getMemTotal());
System.out.println("Total Free Memory:"+nodeMemory.getMemFree());
System.out.println("Total Swap Space Size:"+nodeMemory.getSwapTotal());
System.out.println("Total Free Swap Space Size:"+nodeMemory.getSwapFree());
} catch( Exception e) {
e.printStackTrace();
}
}
}