localworker.LocalWorker.java Source code

Introduction

Here is the source code for localworker.LocalWorker.java

Source

/*
 * 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 localworker;

import java.util.concurrent.BlockingQueue;
import java.util.concurrent.TimeUnit;

import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;

public class LocalWorker implements Runnable {
    BlockingQueue<String> jobQ;
    BlockingQueue<String> respQ;

    public LocalWorker(BlockingQueue<String> jobQ, BlockingQueue<String> respQ) {
        this.jobQ = jobQ;
        this.respQ = respQ;
    }

    @SuppressWarnings("unchecked")
    @Override
    public void run() {
        JSONParser parser = new JSONParser();
        JSONObject json;
        String task_id = null;
        String task;

        try {

            while (true) {
                //waiting up to 100ms for an element to become available.
                String messageBody = jobQ.poll(100, TimeUnit.MILLISECONDS);

                if (messageBody != null) {

                    json = (JSONObject) parser.parse(messageBody);

                    task_id = json.get("task_id").toString();
                    task = json.get("task").toString();

                    Thread.sleep(Long.parseLong(task));

                    JSONObject result = new JSONObject();
                    result.put("task_id", task_id);
                    result.put("result", "0");
                    respQ.put(result.toString());

                    //System.out.println(Thread.currentThread().getName()+" sleep done!");
                }
            }

        } catch (Exception e) {
            JSONObject result = new JSONObject();
            result.put("task_id", task_id);
            result.put("result", "1");
            try {
                respQ.put(result.toString());

            } catch (InterruptedException e1) {
                e1.printStackTrace();
            }
        }
    }

}