eu.cloudscale.showcase.servlets.helpers.PaymentService.java Source code

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Here is the source code for eu.cloudscale.showcase.servlets.helpers.PaymentService.java

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/*******************************************************************************
*  Copyright (c) 2015 XLAB d.o.o.
*  All rights reserved. This program and the accompanying materials
*  are made available under the terms of the Eclipse Public License v1.0
*  which accompanies this distribution, and is available at
*  http://www.eclipse.org/legal/epl-v10.html
*  
*  @author XLAB d.o.o.
*******************************************************************************/
package eu.cloudscale.showcase.servlets.helpers;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

import org.apache.commons.io.IOUtils;
import org.springframework.scheduling.annotation.Async;
import org.springframework.scheduling.annotation.AsyncResult;
import org.springframework.stereotype.Service;

@Service("paymentService")
public class PaymentService {
    public static final String BASE_URL = "https://arcane-meadow-6418.herokuapp.com/";

    @Async
    public Future<String> callPaymentService(String distribution, String attr1, String attr2, String attr3) {
        try {
            ExecutorService executor = Executors.newFixedThreadPool(1);
            String url = this.getUrl(distribution, attr1, attr2, attr3);
            Future<Response> response = executor.submit(new Request(new URL(url)));
            InputStream input = response.get().getBody();
            executor.shutdown();

            String body = IOUtils.toString(input, "UTF-8");
            return new AsyncResult<String>(body);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    private String getUrl(String distribution, String attr1, String attr2, String attr3) {
        String url = "";
        if (distribution.equals("gauss")) {
            url = "?mu=" + attr1 + "&sigma=" + attr2 + "&k=0";
        }
        if (distribution.equals("expo")) {
            url = "?lambda=" + attr1 + "&k=" + attr3;
        }
        if (distribution.equals("gamma")) {
            url = "?alpha=" + attr1 + "&beta=" + attr2 + "&k=" + attr3;
        }
        if (distribution.equals("log")) {
            url = "?mu=" + attr1 + "&sigma=" + attr2 + "&k=" + attr3;
        }
        if (distribution.equals("pareto")) {
            url = "?alpha=" + attr1 + "&k=" + attr3;
        }
        if (distribution.equals("weibull")) {
            url = "?alpha=" + attr1 + "&beta=" + attr2 + "&k=" + attr3;
        }
        if (distribution.equals("uniform")) {
            url = "?a=" + attr1 + "&b=" + attr2;
        }
        if (distribution.equals("constant")) {
            url = "?c=" + attr1;
        }
        return BASE_URL + distribution + url + "&test=false";
    }
}