Change directory structure.

[dvibrowser/dvi2epub.git] / src / main / java / jp / sourceforge / dvibrowser / dvicore / util / concurrent / ComputerProgressMonitor.java

diff --git a/src/main/java/jp/sourceforge/dvibrowser/dvicore/util/concurrent/ComputerProgressMonitor.java b/src/main/java/jp/sourceforge/dvibrowser/dvicore/util/concurrent/ComputerProgressMonitor.java
new file mode 100644 (file)
index 0000000..94e4d4b
--- /dev/null
+++ b/src/main/java/jp/sourceforge/dvibrowser/dvicore/util/concurrent/ComputerProgressMonitor.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2009, Takeyuki Nagao
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the
+ * following conditions are met:
+ * 
+ *  * Redistributions of source code must retain the above
+ *    copyright notice, this list of conditions and the
+ *    following disclaimer.
+ *  * Redistributions in binary form must reproduce the above
+ *    copyright notice, this list of conditions and the
+ *    following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ *    
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ */
+
+package jp.sourceforge.dvibrowser.dvicore.util.concurrent;
+import java.util.concurrent.Future;
+import java.util.logging.Logger;
+
+public class ComputerProgressMonitor<K, V> implements Computer<K,V> {
+  private static final Logger LOGGER = Logger.getLogger(ComputerProgressMonitor.class.getName());
+  private final Computer<K, V> computer;
+  
+  public ComputerProgressMonitor(Computer<K, V> computer)
+  {
+    this.computer = computer;
+  }
+  
+  public Future<V> compute(final Computation<K, V> computation)
+  {
+    final Computation<K, V> wrapper = new Computation<K, V>() {
+      public V call() throws Exception
+      {
+        fireComputationBeginEvent(computation);
+        try {
+          V v = computation.call();
+          return v;
+        } catch (Exception e) {
+          throw e;
+        } finally {
+          fireComputationEndEvent(computation);
+        }
+      }
+
+      public K getCacheKey()
+      {
+        return computation.getCacheKey();
+      }
+      
+    };
+    return computer.compute(wrapper);
+  }
+
+  protected void fireComputationEndEvent(Computation<K, V> computation)
+  {
+    LOGGER.finer("computation ended: " + computation);
+  }
+
+  protected void fireComputationBeginEvent(Computation<K, V> computation)
+  {
+    LOGGER.finer("computation started: " + computation);
+  }
+
+  public Computer<K, V> getComputer()
+  {
+    return computer;
+  }
+}