/*
 * 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.tradefed.device;

import com.android.tradefed.result.InputStreamSource;

/**
 * Class that collects logcat in background. Continues to capture logcat even if
 * device goes offline then online.
 */
public class MonkeyLogcatReceiver {
	private BackgroundDeviceAction mDeviceAction;
	private LargeOutputReceiver mReceiver;

	static String LOGCAT_CMD = "logcat -v threadtime |grep ";
	private static final String LOGCAT_DESC = "logcat_";

	public MonkeyLogcatReceiver(ITestDevice device, long maxFileSize,
			int logStartDelay, String mPackage) {
		mReceiver = new LargeOutputReceiver(LOGCAT_DESC,
				device.getSerialNumber(), maxFileSize);
		// FIXME: remove mLogStartDelay. Currently delay starting logcat, as
		// starting
		// immediately after a device comes online has caused adb instability
		mDeviceAction = new BackgroundDeviceAction(LOGCAT_CMD + mPackage,
				LOGCAT_DESC + mPackage, device, mReceiver, logStartDelay);
	}

	public void start() {
		mDeviceAction.start();
	}

	public void stop() {
		mDeviceAction.cancel();
		mReceiver.cancel();
		mReceiver.delete();
	}

	public InputStreamSource getLogcatData() {
		return mReceiver.getData();
	}

	public InputStreamSource getLogcatData(int maxBytes) {
		return mReceiver.getData(maxBytes);
	}

	public void clear() {
		mReceiver.clear();
	}
}