151 lines
5.1 KiB
Java
151 lines
5.1 KiB
Java
/*
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* Copyright (c) 2011, 2018, 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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package vm.share.process;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.util.List;
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import java.util.ArrayList;
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public class StreamReader extends Thread {
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private InputStream in;
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private List<StreamListener> listeners;
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private volatile boolean terminate = false;
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private static final long CLEANUP_TIMEOUT = 60000;
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public StreamReader(String desc) {
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super("Stream Reader: " + desc);
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setDaemon(true);
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}
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public StreamReader(String desc, InputStream in) {
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this(desc);
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setStream(in);
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}
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public void setDescription(String desc) {
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setName("Stream Reader: " + desc);
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}
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public void setStream(InputStream in) {
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this.in = in;
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}
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public synchronized void addListener(StreamListener listener) {
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if (listeners == null)
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listeners = new ArrayList<StreamListener>();
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listeners.add(listener);
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}
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public synchronized void removeListener(StreamListener listener) {
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if (listeners != null) {
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while (listeners.remove(listener))
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;
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}
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}
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public void run() {
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onStart();
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BufferedReader rd;
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try {
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rd = new BufferedReader(new InputStreamReader(in));
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String line;
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while (!terminate) {
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line = rd.readLine();
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if (line == null)
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break;
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onRead(line);
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while (rd.ready()) {
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line = rd.readLine();
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if (line == null)
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break;
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onRead(line);
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}
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if (line == null)
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break;
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}
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cleanup();
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onFinish();
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} catch (IOException e) {
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if (!terminate)
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onException(e);
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else
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onFinish();
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}
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}
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protected void onStart() {
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if (listeners != null) {
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for (StreamListener l : listeners)
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l.onStart();
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}
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}
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protected void onRead(String line) {
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//System.out.println("Read: " + line);
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if (listeners != null) {
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for (StreamListener l : listeners)
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l.onRead(line);
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}
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}
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protected void onFinish() {
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if (listeners != null) {
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for (StreamListener l : listeners)
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l.onFinish();
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}
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}
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protected void onException(Throwable e) {
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if (listeners != null) {
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for (StreamListener l : listeners)
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l.onException(e);
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}
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}
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private void cleanup() {
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try {
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in.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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public void kill() {
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terminate = true;
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try {
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this.join(CLEANUP_TIMEOUT);
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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this.interrupt();
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try {
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this.join(CLEANUP_TIMEOUT);
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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}
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