X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=source%2Fmir%2Fproducer%2FExecuteProgramProducerNode.java;fp=source%2Fmir%2Fproducer%2FExecuteProgramProducerNode.java;h=0c57a1503aa2f681264fac490f62f2206065d2a2;hb=2b0e1c1d91eea7e201af61e1065ad12bf966d1ba;hp=0000000000000000000000000000000000000000;hpb=44425d18d2bb421e09e4add11c20f2c8d2129d26;p=mir.git

diff --git a/source/mir/producer/ExecuteProgramProducerNode.java b/source/mir/producer/ExecuteProgramProducerNode.java
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+++ b/source/mir/producer/ExecuteProgramProducerNode.java
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+/*
+ * Copyright (C) 2001, 2002 The Mir-coders group
+ *
+ * This file is part of Mir.
+ *
+ * Mir is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Mir 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Mir; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * In addition, as a special exception, The Mir-coders gives permission to link
+ * the code of this program with  any library licensed under the Apache Software License,
+ * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
+ * (or with modified versions of the above that use the same license as the above),
+ * and distribute linked combinations including the two.  You must obey the
+ * GNU General Public License in all respects for all of the code used other than
+ * the above mentioned libraries.  If you modify this file, you may extend this
+ * exception to your version of the file, but you are not obligated to do so.
+ * If you do not wish to do so, delete this exception statement from your version.
+ */
+package mir.producer;
+
+import java.util.Map;
+
+import mir.log.LoggerWrapper;
+import mir.util.ParameterExpander;
+
+public class ExecuteProgramProducerNode implements ProducerNode  {
+  private String scriptExpression;
+  private String maxDurationExpression;
+  private String outputVariableExpression;
+  private String returnValueVariableExpression;
+
+  public ExecuteProgramProducerNode(String aScriptExpression, String aMaxDurationExpression, String anOutputVariableExpression,
+                                    String aReturnValueVariableExpression) {
+    scriptExpression = aScriptExpression;
+    maxDurationExpression = aMaxDurationExpression;
+    outputVariableExpression = anOutputVariableExpression;
+    returnValueVariableExpression = aReturnValueVariableExpression;
+  }
+
+  public void produce(Map aValueMap, String aVerb, LoggerWrapper aLogger) throws ProducerFailure {
+    String script;
+    long maxDuration;
+
+    try {
+      script = ParameterExpander.expandExpression(aValueMap, scriptExpression);
+      maxDuration = ParameterExpander.evaluateIntegerExpressionWithDefault(aValueMap, maxDurationExpression, 0);
+
+      ProcessRunner runner = new ProcessRunner(aLogger, script);
+      runner.start();
+
+      synchronized (runner) {
+        runner.wait(maxDuration);
+      }
+      runner.interrupt();
+
+      if (runner.getFinished()) {
+        aLogger.info(script + " terminated successfully, return value = " + runner.getReturnValue() + ".");
+
+        if (returnValueVariableExpression != null) {
+          ParameterExpander.setValueForKey(aValueMap,
+              ParameterExpander.expandExpression(aValueMap, returnValueVariableExpression),
+              new Integer(runner.getReturnValue()));
+        }
+
+      }
+      else {
+        aLogger.info(script + " interrupted prematurely after " + maxDuration + "ms.");
+      }
+    }
+    catch (Throwable e) {
+      aLogger.error("Error while executing " + scriptExpression + " : " + e.toString());
+    }
+  }
+
+  private static class ProcessRunner extends Thread {
+    private String script;
+    private boolean finished = false;
+    private int returnValue = 0;
+    private LoggerWrapper logger;
+
+    public ProcessRunner(LoggerWrapper aLogger, String aScript) {
+      script = aScript;
+      logger = aLogger;
+    }
+
+    public boolean getFinished() {
+      return finished;
+    }
+
+    public int getReturnValue() {
+      return returnValue;
+    }
+
+    public void run() {
+      Process process = null;
+      try {
+        process = Runtime.getRuntime().exec(script);
+        returnValue = process.waitFor();
+
+        finished = true;
+
+        synchronized (this) {
+          this.notify();
+        }
+      }
+      catch (InterruptedException e) {
+        if (process!=null) {
+          process.destroy();
+        }
+      }
+      catch (Exception e) {
+        logger.error(script + " failed to execute: " + e.getMessage());
+      }
+    }
+  }
+
+}