--- /dev/null
+/*
+ * 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.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ThreadFactory;
+
+import jp.sourceforge.dvibrowser.dvicore.util.DaemonThreadFactory;
+
+
+public class ThreadedComputer<K, V> extends AbstractComputer<K, V> {
+// private static final Logger LOGGER = Logger.getLogger(BasicComputer.class
+// .getName());
+ private final ExecutorService executorService;
+
+ public ThreadedComputer(int nThreads, ThreadFactory threadFactory)
+ {
+ if (threadFactory == null) {
+ threadFactory = createThreadFactory();
+ }
+ executorService = createExecutorService(nThreads, threadFactory);
+ }
+
+ public ThreadedComputer(int nThreads)
+ {
+ this(nThreads, null);
+ }
+
+ protected ThreadFactory createThreadFactory()
+ {
+ return new DaemonThreadFactory(Thread.MIN_PRIORITY);
+ }
+
+ protected ExecutorService createExecutorService(int nThreads, ThreadFactory threadFactory)
+ {
+ return Executors.newFixedThreadPool(nThreads, threadFactory);
+ }
+
+ public ExecutorService getExecutorService()
+ {
+ return executorService;
+ }
+
+ @Override
+ public ExecutorService getExecutorService(Computation<K, V> computable)
+ {
+ return executorService;
+ }
+}