Convert GuardedProcess to Scala
This commit is contained in:
ayanamist
@@ -1,145 +0,0 @@
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/*
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* Shadowsocks - A shadowsocks client for Android
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* Copyright (C) 2015 <max.c.lv@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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* ___====-_ _-====___
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* _--^^^#####// \\#####^^^--_
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* _-^##########// ( ) \\##########^-_
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* -############// |\^^/| \\############-
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* _/############// (@::@) \\############\_
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* /#############(( \\// ))#############\
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* -###############\\ (oo) //###############-
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* -#################\\ / VV \ //#################-
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* -###################\\/ \//###################-
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* _#/|##########/\######( /\ )######/\##########|\#_
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* |/ |#/\#/\#/\/ \#/\##\ | | /##/\#/ \/\#/\#/\#| \|
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* ` |/ V V ` V \#\| | | |/#/ V ' V V \| '
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* ` ` ` ` / | | | | \ ' ' ' '
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* ( | | | | )
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* __\ | | | | /__
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* (vvv(VVV)(VVV)vvv)
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*
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* HERE BE DRAGONS
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*
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*/
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package com.github.shadowsocks;
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import android.util.Log;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.lang.System;
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import java.util.Arrays;
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import java.util.List;
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import java.util.concurrent.CountDownLatch;
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import java.util.concurrent.atomic.AtomicReference;
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public class GuardedProcess extends Process {
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private static final String TAG = GuardedProcess.class.getSimpleName();
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private final Thread guardThread;
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private volatile boolean isDestroyed = false;
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private volatile Process process = null;
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public GuardedProcess(String... cmd) throws InterruptedException, IOException {
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this(Arrays.asList(cmd));
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}
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public GuardedProcess(final List<String> cmd) throws InterruptedException, IOException {
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this(cmd, null);
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}
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public GuardedProcess(final List<String> cmd, final Runnable onRestartCallback) throws InterruptedException, IOException {
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final CountDownLatch countDownLatch = new CountDownLatch(1);
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final AtomicReference<IOException> atomicIoException = new AtomicReference<IOException>(null);
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guardThread = new Thread(new Runnable() {
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@Override
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public void run() {
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try {
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while (!isDestroyed) {
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Log.i(TAG, "start process: " + cmd);
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long startTime = System.currentTimeMillis();
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process = startProcess(cmd);
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if (onRestartCallback != null && countDownLatch.getCount() <= 0) {
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onRestartCallback.run();
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}
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countDownLatch.countDown();
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process.waitFor();
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if (System.currentTimeMillis() - startTime < 1000) {
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Log.w(TAG, "process exit too fast, stop guard: " + cmd);
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break;
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}
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}
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} catch (InterruptedException ignored) {
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Log.i(TAG, "thread interrupt, destroy process: " + cmd);
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process.destroy();
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} catch (IOException e) {
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atomicIoException.compareAndSet(null, e);
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} finally {
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countDownLatch.countDown();
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}
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}
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}, "GuardThread-" + cmd);
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guardThread.start();
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countDownLatch.await();
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IOException ioException = atomicIoException.get();
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if (ioException != null) {
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throw ioException;
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}
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}
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private static Process startProcess(List<String> cmd) throws IOException {
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return new ProcessBuilder(cmd).redirectErrorStream(true).start();
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}
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public void destroy() {
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isDestroyed = true;
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guardThread.interrupt();
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process.destroy();
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try {
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guardThread.join();
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} catch (InterruptedException ignored) {
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}
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}
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@Override
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public int exitValue() {
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throw new UnsupportedOperationException();
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}
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@Override
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public InputStream getErrorStream() {
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throw new UnsupportedOperationException();
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}
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@Override
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public InputStream getInputStream() {
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throw new UnsupportedOperationException();
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}
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@Override
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public OutputStream getOutputStream() {
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throw new UnsupportedOperationException();
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}
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@Override
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public int waitFor() throws InterruptedException {
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guardThread.join();
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return 0;
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}
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}
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@@ -0,0 +1,147 @@
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/*
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* Shadowsocks - A shadowsocks client for Android
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* Copyright (C) 2015 <max.c.lv@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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* ___====-_ _-====___
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* _--^^^#####// \\#####^^^--_
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* _-^##########// ( ) \\##########^-_
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* -############// |\^^/| \\############-
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* _/############// (@::@) \\############\_
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* /#############(( \\// ))#############\
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* -###############\\ (oo) //###############-
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* -#################\\ / VV \ //#################-
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* -###################\\/ \//###################-
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* _#/|##########/\######( /\ )######/\##########|\#_
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* |/ |#/\#/\#/\/ \#/\##\ | | /##/\#/ \/\#/\#/\#| \|
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* ` |/ V V ` V \#\| | | |/#/ V ' V V \| '
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* ` ` ` ` / | | | | \ ' ' ' '
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* ( | | | | )
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* __\ | | | | /__
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* (vvv(VVV)(VVV)vvv)
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*
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* HERE BE DRAGONS
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*
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*/
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package com.github.shadowsocks
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import android.util.Log
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import java.io.IOException
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import java.io.InputStream
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import java.io.OutputStream
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import java.util.concurrent.CountDownLatch
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import java.util.concurrent.atomic.AtomicReference
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import collection.JavaConversions._
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object GuardedProcess {
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private val TAG: String = classOf[GuardedProcess].getSimpleName
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@throws(classOf[IOException])
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private def startProcess(cmd: Seq[String]): Process = {
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new ProcessBuilder(cmd).redirectErrorStream(true).start
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}
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}
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class GuardedProcess extends Process {
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private var guardThread: Thread = null
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@volatile
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private var isDestroyed: Boolean = false
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@volatile
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private var process: Process = null
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@throws(classOf[InterruptedException])
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@throws(classOf[IOException])
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def this(cmd: Seq[String], onRestartCallback: Runnable = null) {
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this()
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initThread(cmd, onRestartCallback)
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}
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def initThread(cmd: Seq[String], onRestartCallback: Runnable): Unit = {
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val atomicIoException: AtomicReference[IOException] = new AtomicReference[IOException](null)
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val countDownLatch: CountDownLatch = new CountDownLatch(1)
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guardThread = new Thread(new Runnable() {
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override def run(): Unit = {
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try {
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while (!isDestroyed) {
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Log.i(GuardedProcess.TAG, "start process: " + cmd)
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val startTime: Long = java.lang.System.currentTimeMillis
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process = GuardedProcess.startProcess(cmd)
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if (onRestartCallback != null && countDownLatch.getCount <= 0) {
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onRestartCallback.run()
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}
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countDownLatch.countDown()
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process.waitFor
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if (java.lang.System.currentTimeMillis - startTime < 1000) {
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Log.w(GuardedProcess.TAG, "process exit too fast, stop guard: " + cmd)
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return
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}
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}
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}
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catch {
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case ignored: InterruptedException =>
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Log.i(GuardedProcess.TAG, "thread interrupt, destroy process: " + cmd)
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process.destroy()
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case e: IOException =>
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atomicIoException.compareAndSet(null, e)
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} finally {
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countDownLatch.countDown()
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}
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}
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}, "GuardThread-" + cmd)
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guardThread.start()
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countDownLatch.await()
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val ioException: IOException = atomicIoException.get
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if (ioException != null) {
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throw ioException
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}
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}
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def destroy() {
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isDestroyed = true
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guardThread.interrupt()
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process.destroy()
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try {
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guardThread.join()
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}
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catch {
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case ignored: InterruptedException =>
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}
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}
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def exitValue: Int = {
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throw new UnsupportedOperationException
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}
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def getErrorStream: InputStream = {
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throw new UnsupportedOperationException
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}
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def getInputStream: InputStream = {
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throw new UnsupportedOperationException
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}
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def getOutputStream: OutputStream = {
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throw new UnsupportedOperationException
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}
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@throws(classOf[InterruptedException])
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def waitFor: Int = {
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guardThread.join()
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0
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}
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}
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