public DataBuffer getServerStatus(int version) {
DataBuffer buffer = new DataBuffer();
// system info
double cpu = roundToDecimals(cpuMonitor.getCpuUsage() * 100, 2);
long freeMem = Runtime.getRuntime().freeMemory();
long maxMem = Runtime.getRuntime().maxMemory();
long totalMem = Runtime.getRuntime().totalMemory();
buffer.writeDouble(cpu);
buffer.writeLong(freeMem);
buffer.writeLong(maxMem);
buffer.writeLong(totalMem);
// threads list
long totalThreadsCpuTime = 0;
long[] threadIds = ManagementFactory.getThreadMXBean().getAllThreadIds();
buffer.writeInt(threadIds.length); // 多少条线程.
for (int i = 0; i < threadIds.length; i++) {
long id = threadIds[i];
String name = ManagementFactory.getThreadMXBean().getThreadInfo(id).getThreadName();
long cpuTime = 0;
if (ManagementFactory.getThreadMXBean().isThreadCpuTimeSupported()
&& ManagementFactory.getThreadMXBean().isThreadCpuTimeEnabled()) {
cpuTime = ManagementFactory.getThreadMXBean().getThreadCpuTime(id);
totalThreadsCpuTime += cpuTime;
}
buffer.writeLong(id);
buffer.writeString(name);
buffer.writeLong(cpuTime);
}
buffer.writeLong(totalThreadsCpuTime);
return buffer;
}
public Dashboard() {
// Create CPU monitoring class
cpuMonitor = new PerformanceMonitor();
cpuMonitor.getCpuUsage(); // Set baseline
}
