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Diffstat (limited to 'common/src/at/gv/egovernment/moa/util/MOATimer.java')
-rw-r--r--common/src/at/gv/egovernment/moa/util/MOATimer.java110
1 files changed, 110 insertions, 0 deletions
diff --git a/common/src/at/gv/egovernment/moa/util/MOATimer.java b/common/src/at/gv/egovernment/moa/util/MOATimer.java
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index 000000000..d8bf64fc3
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+++ b/common/src/at/gv/egovernment/moa/util/MOATimer.java
@@ -0,0 +1,110 @@
+package at.gv.egovernment.moa.util;
+
+import java.util.Map;
+import java.util.WeakHashMap;
+
+/**
+ * A timer utility for named timers.
+ *
+ * @author Sven Aigner
+ */
+public class MOATimer {
+
+ /** The single instance of this class. */
+ private static MOATimer instance = null;
+ /** The starting points of single timings. */
+ private static Map timemapstart = new WeakHashMap();
+ /** The end points of single timings. */
+ private static Map timemapend = new WeakHashMap();
+
+ /**
+ * Return the single instance of this class.
+ *
+ * @return The single instance of this class.
+ */
+ public static MOATimer getInstance() {
+ if (instance == null) {
+ instance = new MOATimer();
+ }
+ return instance;
+ }
+
+ /**
+ * Create a new <code>MOATimer</code>.
+ *
+ * Protected to disallow multiple instances.
+ */
+ protected MOATimer() {
+ super();
+ }
+
+ /**
+ * Start timing a certain action.
+ *
+ * The timing belonging to the action ID is garbage collected as soon as there
+ * exists no other reference to the action ID.
+ *
+ * @param id The action ID.
+ */
+ public void startTiming(Object id) {
+ timemapstart.put(id, new Long(System.currentTimeMillis()));
+ }
+
+ /**
+ * Stop timing an action.
+ *
+ * @param id The action ID.
+ */
+ public void stopTiming(Object id) {
+ timemapend.put(id, new Long(System.currentTimeMillis()));
+ }
+
+ /**
+ * Get the duration of an action.
+ *
+ * @param id The action ID for which to compute the duration.
+ * @return long The duration in milliseconds between calls to
+ * <code>startTiming()</code> and <code>stopTiming()</code>. If
+ * only <code>startTiming()</code> has been called for the action, then
+ * current difference to the system time is returned. If no timing exists for
+ * the action, <code>- 1</code> is returned.
+ */
+ public long duration(Object id) {
+ if (timemapstart.containsKey(id)) {
+ long start = ((Long) timemapstart.get(id)).longValue();
+ if (timemapend.containsKey(id)) {
+ long end = ((Long) timemapend.get(id)).longValue();
+ return end - start;
+ } else {
+ return System.currentTimeMillis() - start;
+ }
+ } else
+ return -1;
+ }
+
+ /**
+ * Get the duration of an action, as a nicely formatted <code>String</code>.
+ *
+ * @param id The action ID.
+ * @return String The <code>duration()</code> as a <code>String</code>.
+ */
+ public String durationAsString(Object id) {
+ long dur = duration(id);
+ long second = dur / 1000;
+ long mil = (dur) - (second * 1000);
+ return "Duration: " + second + "." + mil + " seconds";
+ }
+
+ /**
+ * Remove a timing.
+ *
+ * @param id The action ID.
+ */
+ public void clearTiming(String id) {
+ if (timemapstart.containsKey(id))
+ timemapstart.remove(id);
+ if (timemapend.containsKey(id))
+ timemapend.remove(id);
+ }
+
+}