/*
* Licensed to the jNode FTN Platform Develpoment Team (jNode Team)
* under one or more contributor license agreements.
* See the NOTICE file distributed with this work for
* additional information regarding copyright ownership.
* The jNode Team 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 jnode.core;
import com.sun.management.UnixOperatingSystemMXBean;
import java.lang.management.ManagementFactory;
import java.lang.management.OperatingSystemMXBean;
/**
* @author Manjago (kirill@temnenkov.com)
*/
@SuppressWarnings("restriction")
public final class SysInfo {
public static class ThreadInfo {
private final int runningThreads;
public ThreadInfo(int runningThreads) {
this.runningThreads = runningThreads;
}
public int getRunningThreads() {
return runningThreads;
}
@Override
public String toString() {
return "ThreadInfo{" + "runningThreads=" + runningThreads + '}';
}
}
public static class MemoryInfo {
private final int total;
private final int free;
private final int max;
private static int toMB(long value) {
return Math.round(value / (1024L * 1024L));
}
public int getTotal() {
return total;
}
public int getFree() {
return free;
}
public int getMax() {
return max;
}
public MemoryInfo(long total, long free, long max) {
this.total = toMB(total);
this.free = toMB(free);
this.max = toMB(max);
}
@Override
public String toString() {
return "MemoryInfo{" + "total=" + total + ", free=" + free + ", max=" + max + '}';
}
}
public static class OpenFilesInfo {
public long getOpenFiles() {
return openFiles;
}
public long getMaxOpenFiles() {
return maxOpenFiles;
}
private final long openFiles;
private final long maxOpenFiles;
public OpenFilesInfo(long openFiles, long maxOpenFiles) {
this.openFiles = openFiles;
this.maxOpenFiles = maxOpenFiles;
}
@Override
public String toString() {
return "OpenFilesInfo{" + "openFiles=" + openFiles + ", maxOpenFiles=" + maxOpenFiles + '}';
}
}
private SysInfo() {
}
public static OpenFilesInfo openFilesInfo() {
OperatingSystemMXBean os = ManagementFactory.getOperatingSystemMXBean();
if (os instanceof UnixOperatingSystemMXBean) {
UnixOperatingSystemMXBean unixOperatingSystemMXBean = (UnixOperatingSystemMXBean) os;
return new OpenFilesInfo(
unixOperatingSystemMXBean.getOpenFileDescriptorCount(),
unixOperatingSystemMXBean.getMaxFileDescriptorCount());
} else {
return null;
}
}
public static MemoryInfo memoryInfo() {
Runtime runtime = Runtime.getRuntime();
return new MemoryInfo(runtime.totalMemory(), runtime.freeMemory(), runtime.maxMemory());
}
public static ThreadInfo threadInfo(){
return new ThreadInfo(Thread.activeCount());
}
}