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;
    }
}