Exception in thread "main" java.lang.NullPointerException: No API environment is registered for this thread getCurrentAppId

[shiv.mymail via StackOverflow]

Language: - Java 1.7
Environment: - Eclipse IDE Kepler

Requirement: - It is regarding fetch data from java application. I have created a web application in GAE which is working fine. Now I want to my application code should run from main and retrieve the date stored in Data Store. Need to fetch data from core java application.

import java.util.List; 
import com.google.appengine.api.datastore.Entity; 
import com.google.appengine.api.datastore.PreparedQuery; 
import com.google.appengine.api.datastore.Query; 
import com.google.appengine.api.datastore.Query.FilterOperator; 
import com.google.appengine.api.datastore.DatastoreService; 
import com.google.appengine.api.datastore.DatastoreServiceFactory; 
import com.google.appengine.api.datastore.FetchOptions; 

public static void main(String[] args)
    {
        DatastoreService datastore = DatastoreServiceFactory.getDatastoreService();
        Query query = new Query("SMS").addSort("Date", Query.SortDirection.DESCENDING);
        List<Entity> customers =  datastore.prepare(query).asList(FetchOptions.Builder.withLimit(50));

        for(Entity e : customers){

            System.out.println("Service: - " + e.getProperty("Service") );
            System.out.println("UserName: - " + e.getProperty("UserName") );
            System.out.println("QueryString: - " + e.getProperty("QueryString") );
            System.out.println("EmailId: - " + e.getProperty("EmailId") );
            System.out.println("MobileHashFormat: - " + e.getProperty("MobileHashFormat") );
            System.out.println("Date: - " + e.getProperty("Date") );
            System.out.println("Status: - " + e.getProperty("Status") );




            }
        }

Exception: -

Exception in thread "main" java.lang.NullPointerException: No API environment is registered for this thread. at com.google.appengine.api.datastore.DatastoreApiHelper.getCurrentAppId(DatastoreApiHelper.java:86) at com.google.appengine.api.datastore.DatastoreApiHelper.getCurrentAppIdNamespace(DatastoreApiHelper.java:102) at com.google.appengine.api.datastore.Query.(Query.java:215) at com.google.appengine.api.datastore.Query.(Query.java:144) at serive.TestGAEFile.main(TestGAEFile.java:17)

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