Package org.jboss.soa.bpel.samples.quickstart.account

Source Code of org.jboss.soa.bpel.samples.quickstart.account.AccountSystem_Impl

/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the JBPM BPEL PUBLIC LICENSE AGREEMENT as
* published by JBoss Inc.; either version 1.0 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/
package org.jboss.soa.bpel.samples.quickstart.account;

import java.io.IOException;
import java.net.URL;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import javax.jws.WebService;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

/**
* Account system endpoint implementation bean.
*
* @author Alejandro Guizar
* @version $Revision: 227 $ $Date: 2006/09/27 03:53:01 $
*/
@WebService(endpointInterface = "org.jboss.soa.bpel.samples.quickstart.account.AccountSystem", targetNamespace = "http://jbpm.org/examples/account", serviceName = "AccountService", portName = "AccountSystemPort")
public class AccountSystem_Impl implements AccountSystem {

  private static Map<String, Double> accounts = loadAccounts("accounts.xml");

  public boolean checkAccess(String customerName) {
    return accounts.containsKey(customerName);
  }

  public double queryBalance(String customerName) {
    return getBalance(customerName);
  }

  public double updateBalance(AccountOperation body) {
    String customerName = body.getCustomerName();
    double newBalance = getBalance(customerName) + body.getAmount();
    accounts.put(customerName, new Double(newBalance));
    return newBalance;
  }

  private double getBalance(String customerName) {
    Double balance = (Double) accounts.get(customerName);
    return balance.doubleValue();
  }

  private static Map<String, Double> loadAccounts(String resourceName) {
    try {
      // parse the accounts document
      DocumentBuilder domBuilder =
          DocumentBuilderFactory.newInstance().newDocumentBuilder();
      URL resource = AccountSystem_Impl.class.getResource(resourceName);
      if (resource == null) return Collections.emptyMap();
      Document accountsDocument = domBuilder.parse(resource.toString());
      // give everyone an initial balance of $50
      Double initialBalance = new Double(50);
      // iterate over the accounts
      Map<String, Double> accounts = new HashMap<String, Double>();
      Element accountsElem = accountsDocument.getDocumentElement();
      NodeList accountElems = accountsElem.getElementsByTagName("account");
      for (int i = 0, n = accountElems.getLength(); i < n; i++) {
        Element accountElem = (Element) accountElems.item(i);
        // create account, assign initial balance
        String customerName = accountElem.getAttribute("holder");
        accounts.put(customerName, initialBalance);
      }
      return accounts;
    }
    catch (ParserConfigurationException e) {
      // default configuration for document builder should work
      throw new AssertionError(e);
    }
    catch (SAXException e) {
      return Collections.emptyMap();
    }
    catch (IOException e) {
      return Collections.emptyMap();
    }
  }
}
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