jsonclient.JsonClient.java Source code

Introduction

Here is the source code for jsonclient.JsonClient.java

Source

/*
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package jsonclient;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import java.util.List;
import com.google.gson.Gson;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.logging.Level;
import java.util.logging.Logger;
import places.Place;
import places.Places;
import places.City;
import places.Country;
import places.Region;

/**
 * 
 * @author AmirKapsatarov
 */

//:  ??  ?  ?( ).
// ??   url.
//  ? ? .
//?   ?     .
public class JsonClient {

    private static String postToURL(String url, String message, DefaultHttpClient httpClient)
            throws IOException, IllegalStateException, UnsupportedEncodingException, RuntimeException {
        HttpPost postRequest = new HttpPost(url);

        StringEntity input = new StringEntity(message);
        input.setContentType("application/json");
        postRequest.setEntity(input);

        HttpResponse response = httpClient.execute(postRequest);

        if (response.getStatusLine().getStatusCode() != 200) {
            throw new RuntimeException("Failed : HTTP error code : " + response.getStatusLine().getStatusCode());
        }

        BufferedReader br = new BufferedReader(new InputStreamReader((response.getEntity().getContent())));

        String output;
        StringBuffer totalOutput = new StringBuffer();
        //System.out.println("Output from Server .... \n");
        while ((output = br.readLine()) != null) {
            //System.out.println(output);
            totalOutput.append(output);
        }
        return totalOutput.toString();
    }

    public static String setSlide(String message) throws IOException {
        String url = "http://something";
        DefaultHttpClient httpClient = new DefaultHttpClient();
        String response = postToURL(url, message, httpClient);
        httpClient.getConnectionManager().shutdown();
        return response;
    }

    public static List<Place> getCountries() {
        String jsonQuery;
        String repsonse;
        Places countries = null;
        jsonQuery = "{\"data\":{\"action\":\"GetCountryList\", \"param\":{}}}";
        List<Place> countriesList = new ArrayList<Place>();
        try {
            repsonse = JsonClient.setSlide(jsonQuery);
            countries = new Gson().fromJson(repsonse, Places.class);
        } catch (IOException ex) {
            System.out.println(ex);
        }
        countriesList.addAll(countries.getData().getList());
        countriesList.addAll(countries.getData().getPrefferedList());
        return countriesList;
    }

    public static List<Place> getRegions(String countryId) {
        String jsonQuery;
        String repsonse;
        Places regions = null;
        jsonQuery = "{\"data\":{\"action\":\"GetRegionList\", \"param\":{\"countryId\":\"" + countryId + "\"}}}";
        List<Place> regionsList = new ArrayList<Place>();
        try {
            repsonse = JsonClient.setSlide(jsonQuery);
            regions = new Gson().fromJson(repsonse, Places.class);
        } catch (IOException ex) {
            System.out.println(ex);
        }
        regionsList.addAll(regions.getData().getList());
        regionsList.addAll(regions.getData().getPrefferedList());
        return regionsList;
    }

    public static List<Place> getCities(String regionId) {
        String jsonQuery;
        String repsonse;
        Places cities = null;
        jsonQuery = "{\"data\":{\"action\":\"GetCityList\", \"param\":{\"regionId\":\"" + regionId + "\"}}}";
        List<Place> citiesList = new ArrayList<Place>();
        try {
            repsonse = JsonClient.setSlide(jsonQuery);
            cities = new Gson().fromJson(repsonse, Places.class);
        } catch (IOException ex) {
            System.out.println(ex);
        }
        citiesList.addAll(cities.getData().getList());
        citiesList.addAll(cities.getData().getPrefferedList());
        return citiesList;
    }

    public static void main(String args[]) {

        int EPS = 1;
        List<Place> countries = new ArrayList<Place>();
        List<Thread> threads = new ArrayList<Thread>();
        Country country;
        countries = getCountries();
        //CountrySearcher countrySearcher = null;
        Iterator<Place> itrCountry = countries.iterator();
        ExecutorService exec = Executors.newFixedThreadPool(4);

        while (itrCountry.hasNext()) {
            country = new Country(itrCountry.next());
            CountrySearcher cs = new CountrySearcher(country, EPS);
            threads.add(cs.thread);
            exec.execute(cs);
        }

        exec.shutdown();

        for (Thread th : threads)
            try {
                th.join();
            } catch (InterruptedException ex) {
                Logger.getLogger(JsonClient.class.getName()).log(Level.SEVERE, null, ex);
            }

    }
}