144 lines
4.3 KiB
Scala
144 lines
4.3 KiB
Scala
/*
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* Shadowsocks - A shadowsocks client for Android
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* Copyright (C) 2016 <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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/**
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* @author ayanamist@gmail.com
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*/
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class GuardedProcess (cmd: Seq[String], onRestartCallback: Runnable = null) extends Process {
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private val TAG = classOf[GuardedProcess].getSimpleName
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@volatile private var guardThread: Thread = null
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@volatile private var isDestroyed: Boolean = false
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@volatile private var process: Process = null
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def start(): GuardedProcess = {
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val atomicIoException = new AtomicReference[IOException](null)
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val countDownLatch = new CountDownLatch(1)
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guardThread = new Thread(new Runnable() {
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override def 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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val startTime = java.lang.System.currentTimeMillis
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process = new ProcessBuilder(cmd).redirectErrorStream(true).start
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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(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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} catch {
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case ignored: InterruptedException =>
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Log.i(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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this
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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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