git-svn-id: https://joinup.ec.europa.eu/svn/moa-idspss/tags/1.4.5@1131 d688527b-c9ab-4aba-bd8d-4036d912da1d

1 files changed, 125 insertions, 0 deletions

diff --git a/common/src/main/java/at/gv/egovernment/moa/util/MOATimer.java b/common/src/main/java/at/gv/egovernment/moa/util/MOATimer.java
new file mode 100644
index 000000000..a2ec7386c
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+++ b/common/src/main/java/at/gv/egovernment/moa/util/MOATimer.java
@@ -0,0 +1,125 @@
+/*
+* Copyright 2003 Federal Chancellery Austria
+*
+* Licensed 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 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);
+  }
+
+}