author | jjg |
Mon, 20 May 2019 10:57:57 -0700 | |
changeset 54950 | 46ae54c3026d |
parent 47216 | 71c04702a3d5 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2000, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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package sun.jvm.hotspot.utilities; |
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import java.io.*; |
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import java.util.*; |
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/** Reads all of the data from the given InputStream, and allows the |
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caller to wait for a given string to come in or watch for many |
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possible strings. */ |
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public class StreamMonitor implements Runnable { |
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private BufferedReader input; |
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private boolean printStreamContents; |
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private String waitString; |
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private boolean waitStringSeen; |
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private List triggers = new LinkedList(); |
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private List triggersSeen = new LinkedList(); |
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private String prefixString; |
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private boolean printContents; |
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private StringBuffer captureBuffer; |
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class Trigger { |
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private String[] triggerStrings; |
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private int triggerVal; |
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Trigger(String str, int val) { |
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triggerStrings = new String[] { str }; |
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triggerVal = val; |
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} |
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// Hack because we don't have a regexp library yet. |
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// This requires all strings to be matched. |
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Trigger(String[] strs, int val) { |
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triggerStrings = strs; |
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triggerVal = val; |
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} |
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boolean matches(String str) { |
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for (int i = 0; i < triggerStrings.length; i++) { |
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if (str.indexOf(triggerStrings[i]) == -1) { |
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return false; |
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} |
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} |
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return true; |
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} |
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boolean equals(String[] strs) { |
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if (strs.length != triggerStrings.length) { |
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return false; |
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} |
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for (int i = 0; i < strs.length; i++) { |
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if (!strs[i].equals(triggerStrings[i])) { |
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return false; |
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} |
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} |
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return true; |
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} |
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} |
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/** Equivalent to StreamMonitor(istr, null, false) */ |
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public StreamMonitor(InputStream istr) { |
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this(istr, null, false); |
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} |
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public StreamMonitor(InputStream istr, String prefixString, boolean printContents) { |
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input = new BufferedReader(new InputStreamReader(istr)); |
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this.prefixString = prefixString; |
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this.printContents = printContents; |
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Thread thr = new Thread(this); |
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thr.setDaemon(true); |
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thr.start(); |
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} |
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/** Adds a "trigger", which the stream watches for and, if seen, |
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reports the trigger value of via the getTriggers() method. |
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Returns true if the addition was successful, false if the string |
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was already present as a trigger. */ |
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public boolean addTrigger(String str, int value) { |
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return addTrigger(new String[] { str }, value); |
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} |
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/** Adds a "trigger", which the stream watches for and, if seen, |
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reports the trigger value of via the getTriggers() method. |
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Returns true if the addition was successful, false if the string |
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was already present as a trigger. */ |
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public boolean addTrigger(String[] strs, int value) { |
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for (Iterator iter = triggers.iterator(); iter.hasNext(); ) { |
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Trigger trigger = (Trigger) iter.next(); |
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if (trigger.equals(strs)) { |
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return false; |
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} |
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} |
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Trigger trigger = new Trigger(strs, value); |
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return triggers.add(trigger); |
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} |
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/** Removes a previously added trigger. Returns true if it was |
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present, false if not. */ |
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public boolean removeTrigger(String str) { |
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return removeTrigger(new String[] { str }); |
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} |
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/** Removes a previously added trigger. Returns true if it was |
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present, false if not. */ |
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public boolean removeTrigger(String[] strs) { |
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for (ListIterator iter = triggers.listIterator(); iter.hasNext(); ) { |
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Trigger trigger = (Trigger) iter.next(); |
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if (trigger.equals(strs)) { |
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iter.remove(); |
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return true; |
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} |
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} |
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return false; |
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} |
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/** Returns an List of java.lang.Integer objects indicating the |
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values of the triggers seen since the last call to |
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getTriggersSeen. If there were no triggers seen, returns an |
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empty list; does not return null. */ |
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public synchronized List getTriggersSeen() { |
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List tmpList = triggersSeen; |
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triggersSeen = new LinkedList(); |
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return tmpList; |
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} |
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/** Waits for the specified string to come in for the given period |
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of time (measured in milliseconds). */ |
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public synchronized boolean waitFor(String str, long millis) { |
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waitString = str; |
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waitStringSeen = false; |
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try { |
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wait(millis); |
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} |
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catch (InterruptedException e) { |
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} |
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waitString = null; |
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return waitStringSeen; |
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} |
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public synchronized void startCapture() { |
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captureBuffer = new StringBuffer(); |
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} |
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public synchronized String stopCapture() { |
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String ret = captureBuffer.toString(); |
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captureBuffer = null; |
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return ret; |
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} |
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public void run() { |
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byte[] buf = new byte[10240]; |
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boolean shouldContinue = true; |
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try { |
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do { |
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String str = input.readLine(); |
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if (str == null) { |
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shouldContinue = false; |
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} else { |
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if (printContents) { |
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System.err.println(prefixString + ": " + str); |
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} |
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synchronized (this) { |
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if (captureBuffer != null) { |
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captureBuffer.append(str); |
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captureBuffer.append("\n"); |
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} |
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// Check wait string |
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if ((waitString != null) && |
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(str.indexOf(waitString) != -1)) { |
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waitStringSeen = true; |
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notifyAll(); |
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} |
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// Check all triggers |
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for (Iterator iter = triggers.iterator(); iter.hasNext(); ) { |
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Trigger trigger = (Trigger) iter.next(); |
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if (trigger.matches(str)) { |
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triggersSeen.add(new Integer(trigger.triggerVal)); |
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} |
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} |
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} |
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} |
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} while (shouldContinue); |
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} |
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catch (IOException e) { |
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} |
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System.err.print("StreamMonitor "); |
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if (prefixString != null) { |
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System.err.print("\"" + prefixString + "\" "); |
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} |
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System.err.println("exiting"); |
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} |
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} |