CommandTaskConsumer.java

/*
 * Tencent is pleased to support the open source community by making
 * Tencent GT (Version 2.4 and subsequent versions) available.
 *
 * Notwithstanding anything to the contrary herein, any previous version
 * of Tencent GT shall not be subject to the license hereunder.
 * All right, title, and interest, including all intellectual property rights,
 * in and to the previous version of Tencent GT (including any and all copies thereof)
 * shall be owned and retained by Tencent and subject to the license under the
 * Tencent GT End User License Agreement (http://gt.qq.com/wp-content/EULA_EN.html).
 * 
 * Copyright (C) 2015 THL A29 Limited, a Tencent company. All rights reserved.
 * 
 * Licensed under the MIT License (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of the License at
 * 
 * http://opensource.org/licenses/MIT
 * 
 * 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.tencent.wstt.gt.data.control;

import android.os.Bundle;

import com.tencent.wstt.gt.IService;

public class CommandTaskConsumer {
	private Thread thread;
	boolean flag;
	
	public CommandTaskConsumer(final IService gtService,
			final DataCacheController dataCacheController)
	{
		thread = new Thread(new Runnable() {

			@Override
			public void run() {

				try {
					while (flag) {
						Bundle task = dataCacheController.takeCommandTask();
						if (null != task) {
							gtService.setCommond((Bundle) task);
						}
						
					}
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		}, CommandTaskConsumer.this.getClass().getSimpleName());
	}
	
	public void start()
	{
		flag = true;
		thread.setPriority(Thread.MIN_PRIORITY + 2); // 比性能优先级高点
		thread.start();
	}
	
	public void stop(final DataCacheController dataCacheController)
	{
		flag = false;
		/*
		 * stop时，如果日志队列为空，那会始终使线程卡在takeTask上使flag没机会生效，
		 * 所以这里取巧放一个task，使线程运转起来
		 */
		dataCacheController.putCommandTask(new Bundle());
		thread = null;
	}
}