Subversion Repositories SmartDukaan

package com.saholic.profittill.Services;

import android.util.Base64;

import org.apache.http.HttpResponse;

import org.apache.http.NameValuePair;

import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.HttpClient;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.message.BasicNameValuePair;

import org.json.JSONObject;

import java.io.IOException;

import java.util.ArrayDeque;

import java.util.ArrayList;

import java.util.Queue;

import java.util.concurrent.Executor;

public class SerialExecutor implements Executor {

    final Queue<Runnable> tasks = new ArrayDeque();

    static Executor singletonExector;

    Executor executor = new Executor() {

        @Override

        public void execute(Runnable command) {

            new Thread(command).start();

        }

    };

    Runnable active;

    public synchronized void execute(final Runnable r) {

        tasks.offer(new Runnable() {

            public void run() {

                try {

                    r.run();

                } finally {

                    scheduleNext();

                }

            }

        });

        if (active == null) {

            scheduleNext();

        }

    }

    protected synchronized void scheduleNext() {

        if ((active = tasks.poll()) != null) {

            executor.execute(active);

        }

    }

    public static Executor getInstance(){

        if (singletonExector==null) {

            singletonExector = new SerialExecutor();

        }

        return singletonExector;

    }

}