| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed 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 com.android.pts.ptsutil; |
| |
| import com.android.ddmlib.IShellOutputReceiver; |
| import com.android.tradefed.device.BackgroundDeviceAction; |
| import com.android.tradefed.device.ITestDevice; |
| |
| import java.io.IOException; |
| import java.util.concurrent.LinkedBlockingQueue; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * class to monitor adb logcat asynchronously. |
| * Unlike tradefed's LogcatReceiver, log is accumulated to a buffer, and the log is removed after |
| * reading once. |
| */ |
| public class LogcatMonitor implements IShellOutputReceiver { |
| private static final String TAG = "LogcatMonitor"; |
| private LinkedBlockingQueue<String> mQ = new LinkedBlockingQueue<String>(); |
| private boolean mRunning = false; |
| private long mTimeoutInSec; |
| private BackgroundDeviceAction mDeviceAction; |
| // sentinel to detect EOS |
| private static final String EOS = "LOGCAT_MONITOR_EOS"; |
| private static final String LOGCAT_CMD = "logcat -v threadtime "; |
| |
| public LogcatMonitor(ITestDevice device, String logcatFilter, long timeoutInSec) { |
| mTimeoutInSec = timeoutInSec; |
| int logStartDelay = 0; |
| mDeviceAction = new BackgroundDeviceAction(LOGCAT_CMD + logcatFilter, TAG, device, |
| this, logStartDelay); |
| } |
| |
| /** start monitoring log */ |
| public void start() { |
| if (mRunning) { |
| return; |
| } |
| clear(); |
| mDeviceAction.start(); |
| mRunning = true; |
| } |
| |
| /** stop monitoring */ |
| public void stop() { |
| mDeviceAction.cancel(); |
| mRunning = false; |
| } |
| |
| /** clear all stored logs */ |
| public void clear() { |
| mQ.clear(); |
| } |
| |
| /** |
| * read a line of log. If there is no data stored, it can wait until |
| * the timeout specified in the constructor. |
| * @return null for time-out. Otherwise, a line of log is returned. |
| * @throws IOException for EOS (logcat terminated for whatever reason) |
| * @throws InterruptedException |
| */ |
| public String getALine() throws IOException, InterruptedException { |
| String line = mQ.poll(mTimeoutInSec, TimeUnit.SECONDS); |
| if (line == EOS) { |
| throw new IOException(); |
| } |
| return line; |
| } |
| |
| public boolean dataAvailable() { |
| return !mQ.isEmpty(); |
| } |
| |
| @Override |
| public void addOutput(byte[] data, int offset, int length) { |
| String lines = new String(data, offset, length); |
| for (String line : lines.split("\n")) { |
| mQ.add(line); |
| } |
| } |
| |
| @Override |
| public void flush() { |
| mQ.add(EOS); |
| mRunning = false; |
| } |
| |
| @Override |
| public boolean isCancelled() { |
| return !mRunning; |
| } |
| } |