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Posted to commits@tuscany.apache.org by me...@apache.org on 2007/02/24 02:47:00 UTC
svn commit: r511187 -
/incubator/tuscany/java/sca/runtime/standalone/smoketest/src/test/java/org/apache/tuscany/sca/runtime/standalone/smoketest/ProcessDrainer.java
Author: meerajk
Date: Fri Feb 23 17:47:00 2007
New Revision: 511187
URL: http://svn.apache.org/viewvc?view=rev&rev=511187
Log:
Porcess drainer for draining the stdout and stderr streams of
externally started processes to cope with buffer overflows and
deadlocks.
Added:
incubator/tuscany/java/sca/runtime/standalone/smoketest/src/test/java/org/apache/tuscany/sca/runtime/standalone/smoketest/ProcessDrainer.java (with props)
Added: incubator/tuscany/java/sca/runtime/standalone/smoketest/src/test/java/org/apache/tuscany/sca/runtime/standalone/smoketest/ProcessDrainer.java
URL: http://svn.apache.org/viewvc/incubator/tuscany/java/sca/runtime/standalone/smoketest/src/test/java/org/apache/tuscany/sca/runtime/standalone/smoketest/ProcessDrainer.java?view=auto&rev=511187
==============================================================================
--- incubator/tuscany/java/sca/runtime/standalone/smoketest/src/test/java/org/apache/tuscany/sca/runtime/standalone/smoketest/ProcessDrainer.java (added)
+++ incubator/tuscany/java/sca/runtime/standalone/smoketest/src/test/java/org/apache/tuscany/sca/runtime/standalone/smoketest/ProcessDrainer.java Fri Feb 23 17:47:00 2007
@@ -0,0 +1,132 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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 org.apache.tuscany.sca.runtime.standalone.smoketest;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Stream drainer used for draining the out and err streams of an external
+ * process to avoid buffer overflow and deadlock.
+ *
+ * @version $Revision$ $Date$
+ *
+ */
+public class ProcessDrainer {
+
+ // Default time out in seconds
+ private static final int DEFAULT_TIMEOUT = 60;
+
+ // Process whose streams are being drained
+ private Process process;
+
+ // Timeout to wait for the extrenal process to whutdown
+ private int timeout = DEFAULT_TIMEOUT;
+
+ // Executor that is scheduling the draining
+ private ExecutorService executor = Executors.newFixedThreadPool(2);
+
+ /*
+ * Initializes the process to drained.
+ */
+ private ProcessDrainer(Process process) {
+ this.process = process;
+ }
+
+ /*
+ * Initializes the process to drained.
+ */
+ private ProcessDrainer(Process process, int timeout) {
+ this.process = process;
+ this.timeout = timeout;
+ }
+
+ /**
+ * Creates a new instance of the stream drainer for the processed.
+ * @param process Process to be drained.
+ * @return An instance of the stream drainer.
+ */
+ public static ProcessDrainer newStreamDrainer(Process process) {
+ return new ProcessDrainer(process);
+ }
+
+ /**
+ * Creates a new instance of the stream drainer for the processed.
+ * @param process Process to be drained.
+ * @param timeout Timeout before which teh drainer stops.
+ * @return An instance of the stream drainer.
+ */
+ public static ProcessDrainer newStreamDrainer(Process process, int timeout) {
+ return new ProcessDrainer(process, timeout);
+ }
+
+ /**
+ * Starts draining the stream.
+ */
+ public void drain() {
+
+ executor.execute(new StreamDrainer(process.getErrorStream()));
+ executor.execute(new StreamDrainer(process.getInputStream()));
+
+ executor.shutdown();
+ try {
+ executor.awaitTermination(timeout, TimeUnit.SECONDS);
+ } catch (InterruptedException ex) {
+ return;
+ }
+
+ }
+
+ /*
+ * Scheduled stream drainer.
+ */
+ private class StreamDrainer implements Runnable {
+
+ // Stream to be drained
+ private final InputStream inputStream;
+
+ /*
+ * Initializes the stream to drained.
+ */
+ private StreamDrainer(InputStream inputStream) {
+ this.inputStream = inputStream;
+ }
+
+ /*
+ * Starts draing the stream.
+ */
+ public void run() {
+ try {
+ int count = 0;
+ byte[] buffer = new byte[4096];
+ count = inputStream.read(buffer);
+ while (count != -1) {
+ count = inputStream.read(buffer);
+ }
+ } catch (IOException ex) {
+ throw new RuntimeException(ex);
+ }
+ }
+
+ }
+
+}
Propchange: incubator/tuscany/java/sca/runtime/standalone/smoketest/src/test/java/org/apache/tuscany/sca/runtime/standalone/smoketest/ProcessDrainer.java
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Propchange: incubator/tuscany/java/sca/runtime/standalone/smoketest/src/test/java/org/apache/tuscany/sca/runtime/standalone/smoketest/ProcessDrainer.java
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