src/utils/reorder/tools/MaxTime.java
changeset 47216 71c04702a3d5
parent 23010 6dadb192ad81
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/utils/reorder/tools/MaxTime.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.lang.reflect.Method;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.util.jar.Attributes;
+import java.util.jar.JarFile;
+
+/** Run an application (from a jar file) and terminate it after a given
+ *  number of seconds.
+ */
+
+public class MaxTime {
+
+    private static boolean debugFlag = false;
+
+
+    private static void debug(String s) {
+        if (debugFlag) {
+            System.err.println(s);
+        }
+    }
+
+
+    private static void usage() {
+        System.err.println(
+          "Usage:\n" +
+          "  java  MaxTime  <jarfile> <timeout>\n" +
+          "\n" +
+          "  <jarfile> is a jar file specifying an application to run\n" +
+          "  <timeout> is an integer number of seconds to allow the app to run." );
+        System.exit(1);
+    }
+
+
+    public static void main(String[] args) {
+        int timeoutPeriod = 0;
+        String mainClass = null;
+
+        if (args.length != 2)
+            usage();
+
+        // Identify the timeout value.
+        try {
+            timeoutPeriod = Integer.parseInt(args[1]);
+        } catch (Exception e) {
+            usage();
+        }
+
+        // Identify the application's main class.
+        try {
+            mainClass = new JarFile(args[0]).getManifest()
+                .getMainAttributes().getValue(Attributes.Name.MAIN_CLASS);
+        } catch (FileNotFoundException e) {
+            System.err.println("Can't find " + args[0]);
+            System.exit(1);
+        } catch (IOException e) {
+            e.printStackTrace();
+            System.exit(2);
+        }
+
+        // Set the exit timer.
+        final int timeout = timeoutPeriod * 1000;
+        new Thread() {
+            public void run() {
+                try {
+                    debug("Before timeout!");
+                    Thread.sleep(timeout);
+                    debug("After timeout!");
+                } catch (InterruptedException e) {
+                }
+                debug("Exit caused by timeout!");
+                System.exit(0);
+            }
+        }.start();
+
+
+        // Start up the app.
+        try {
+            ClassLoader cl = new URLClassLoader(
+                                   new URL[] {new URL("file:"+args[0])});
+            Class clazz = cl.loadClass(mainClass);
+            String[] objs = new String[0];
+            Method mainMethod = clazz.getMethod("main", new Class[]{objs.getClass()});
+            mainMethod.invoke(null, new Object[]{objs});
+        } catch (Exception e) {
+            e.printStackTrace();
+            System.exit(3);
+        }
+    }
+}