DashboardServices.FetchInstances.java Source code

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Here is the source code for DashboardServices.FetchInstances.java

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package DashboardServices;

import com.mongodb.AggregationOutput;
import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBObject;
import com.mongodb.MongoClient;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.UriInfo;
import javax.ws.rs.Produces;
import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PUT;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

/**
 * REST Web Service
 *
 * @author Akkineni
 */
@Path("fetchinstances")
public class FetchInstances {

    @Context
    private UriInfo context;

    /**
     * Creates a new instance of Fetchrole
     */
    public FetchInstances() {
    }

    /**
     * Retrieves representation of an instance of DashboardServices.Fetchrole
     * @return an instance of java.lang.String
     */
    @POST
    @Produces(MediaType.APPLICATION_JSON)
    public String getJson() {
        //TODO return proper representation object
        throw new UnsupportedOperationException();
    }

    @GET
    @Produces(MediaType.TEXT_PLAIN)
    public Response getRole(@Context UriInfo info) {
        String projectId = info.getQueryParameters().getFirst("projectId");
        String entityName = info.getQueryParameters().getFirst("entityName");
        System.out.println("projectId" + projectId);
        String finalOutput = "";
        try {
            MongoClient mongoClient;
            try {
                mongoClient = new MongoClient();
                // Now connect to your databases
                DB db = mongoClient.getDB("SSKDatabase");
                //System.out.println("Connect to database successfully");
                DBCollection coll = db.getCollection("insa");

                DBObject match = new BasicDBObject("$match", new BasicDBObject("_id", projectId));
                DBObject unwind = new BasicDBObject("$unwind", "$" + entityName);
                DBObject project = new BasicDBObject("$project", new BasicDBObject("instances", "$" + entityName));

                AggregationOutput output = coll.aggregate(match, unwind, project);
                if (output != null) {
                    System.out.println("Ajay worked");
                } else {
                    System.out.println("ajay didnt not woek");
                }
                System.out.println("before if condition");
                for (DBObject result : output.results()) {
                    System.out.println("hai i reached here");
                    System.out.println(result);
                    finalOutput += result;
                }
            } catch (Exception e) {
                System.out.println("error");
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return Response.status(200).entity(finalOutput).build();
    }

    /**
     * PUT method for updating or creating an instance of Fetchrole
     * @param content representation for the resource
     */
    @PUT
    @Consumes(MediaType.APPLICATION_JSON)
    public void putJson(String content) {
    }
}