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97 lines
3.1 KiB
Java
97 lines
3.1 KiB
Java
/****************************************************************************
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* This software is part of the gCube Project.
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* Site: http://www.gcube-system.org/
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****************************************************************************
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* The gCube/gCore software is licensed as Free Open Source software
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* conveying to the EUPL (http://ec.europa.eu/idabc/eupl).
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* The software and documentation is provided by its authors/distributors
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* "as is" and no expressed or
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* implied warranty is given for its use, quality or fitness for a
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* particular case.
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****************************************************************************
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* Filename: PerformanceMonitor.java
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****************************************************************************
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* @author <a href="mailto:daniele.strollo@isti.cnr.it">Daniele Strollo</a>
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***************************************************************************/
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package org.gcube.resourcemanagement.support.shared;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* This class has been introduced to internally check the
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* performance of method calls and operations in general.
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*
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* @author Daniele Strollo (ISTI-CNR)
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*/
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public class PerformanceMonitor {
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private long startMills = 0;
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private long stopMills = 0;
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private long lastInterval = 0;
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private long intermediateInterval = 0;
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private StackTraceElement caller = null;
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public String ownerID = null;
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private final static Map<String, PerformanceMonitor> clocks = new HashMap<String, PerformanceMonitor>();
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private StackTraceElement getCaller(final int depth) {
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final StackTraceElement[] ste = new Throwable().getStackTrace();
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StackTraceElement position = ste[ste.length - 1 - depth];
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return position;
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}
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public static PerformanceMonitor getClock(String ownerID) {
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if (clocks.containsKey(ownerID)) {
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return clocks.get(ownerID);
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}
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PerformanceMonitor retval = new PerformanceMonitor(ownerID);
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clocks.put(ownerID, retval);
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return retval;
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}
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public static PerformanceMonitor getClock(Class<?> owner) {
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return getClock(owner.getName());
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}
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private PerformanceMonitor(String owner) {
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this.ownerID = owner;
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this.caller = this.getCaller(1);
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}
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public final void start() {
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this.startMills = System.currentTimeMillis();
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this.stopMills = 0;
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this.lastInterval = 0;
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this.intermediateInterval = 0;
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}
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public final float stop(final boolean relative) {
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this.stopMills = System.currentTimeMillis();
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this.intermediateInterval = (this.stopMills - this.startMills) - this.lastInterval;
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this.lastInterval = this.stopMills - this.startMills;
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if (relative) {
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return this.getIntermediateIntervalSecs();
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}
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return this.getLastIntervalSecs();
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}
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private final float getIntermediateIntervalSecs() {
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if (this.intermediateInterval == 0) {
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return 0;
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}
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return this.intermediateInterval / 1000F;
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}
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private final float getLastIntervalSecs() {
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if (this.lastInterval == 0) {
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return 0;
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}
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return this.lastInterval / 1000F;
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}
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public final StackTraceElement getCaller() {
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return this.caller;
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}
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public final String getOwnerID() {
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return this.ownerID;
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}
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}
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