实例
public class PerformanceMetricsTask implements TimerTask {
// Values to use with TimeOutTaskCreator
// Count performance metrics every second
public static final long DELAY = 1;
public static final TimeUnit UNIT = TimeUnit.SECONDS;
private static final int BYTES_PER_KILO = 1024;
private ByteCounterHandler byteCounter;
private MessageCounterHandler msgCounter;
private static Logger logger = LoggerFactory.getLogger(PerformanceMetricsTask.class);
public PerformanceMetricsTask(ByteCounterHandler byteCounter, MessageCounterHandler msgCounter) {
this.msgCounter = msgCounter;
this.byteCounter = byteCounter;
}
@Override
public void run(Timeout timeout) throws Exception {
if (logger.isInfoEnabled()) {
// ****************************** Network Stats
// Bytes read and written in kilobytes
double bytesRead = (byteCounter != null) ? byteCounter.getReadBytesAndClear()
/ (double) (BYTES_PER_KILO * DELAY) : 0;
double bytesWritten = (byteCounter != null) ? byteCounter.getWrittenBytesAndClear()
/ (double) (BYTES_PER_KILO * DELAY) : 0;
// Message read and written in thousands
double msgRead = (msgCounter != null) ? msgCounter.getReadMessagesAndClear()
/ (double) (BYTES_PER_KILO * DELAY) : 0;
double msgWritten = (msgCounter != null) ? msgCounter.getWrittenMessagesAndClear()
/ (double) (BYTES_PER_KILO * DELAY) : 0;
// ***************************** CPU / RAM Stats
RamUsageInfo systemRam = PerformanceMetrics.instance().getSystemRamInfo();
CpuUsageInfo cpuInfo = PerformanceMetrics.instance().getCpuUsageInfo();
double cpuUsage = cpuInfo.totalPerc * 100;
double ramUsage = (systemRam.ramUsed / (double) systemRam.ramMax) * 100;
// Form the reqRespReport
String reqRespReport = "\t(Key:AvgResp)";
for (Integer key : ServerState.reqRespMetricsMap.keySet()) {
ReqRespMetrics.Data rrMet = ServerState.reqRespMetricsMap.get(key).getAndResetInfo();
double avgResp = (rrMet.totalNumReqResps == 0) ? 0 : rrMet.totalRespTime
/ (double) rrMet.totalNumReqResps;
reqRespReport += String.format("(" + OneMessage.Type.valueOf(key) + ":%.2f) ", avgResp);
}
reqRespReport += "\n";
String networkReport = String.format("Performance Report\n"
+ "\t(Read/Write): Messages(1000s): (%.2f/%.2f) KB: (%.2f/%.2f)\n", msgRead, msgWritten, bytesRead,
bytesWritten);
String statusReport = String.format("\tNum Active Connections: %d Num Logger In Users: %d\n",
ServerState.numActiveConnections.longValue(), ServerState.numLoggedInUsers.longValue());
String cpuMemReport = String.format("\tSystem CPU Usage (%%): %.2f System Ram Usage (%%): %.2f", cpuUsage,
ramUsage);
logger.info(networkReport + reqRespReport + statusReport + cpuMemReport);
}
// Make this task recurring
TimeOutTaskCreator.createTask(new PerformanceMetricsTask(byteCounter, msgCounter), DELAY, UNIT);
}
}
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