ServiceChecker


1   package dslprovider;
2   
3   /**
4    * This is a toy application that demonstrates how WSIF can be used to create flexible 
5    * applications.
6    * This ServiceChecker application allows users to enter their names and addresses
7    * through a command line interface and then checks if DSL service is available in
8    * the user's area. If the user has previously registered their addresses, they need not
9    * enter them again. The application also verifies that addresses are correct.
10   *
11   * The application makes use of three WSDL-described services:
12   * 1. Zip2Geo: this service provides information about a US zip code, such as the
13   * corresponding city and state
14   * 2. AddressBook: this service allows names and addresses to be stored and 
15   * looked up 
16   * 3. ServiceAvailability: this service checks if DSL service is available at a 
17   * particular zip code
18   * The locations of the WSDL documents corresponding to these services are provided at 
19   * runtime as command line arguments.
20   *
21   * The key feature of this application is that since it is completely WSDL driven, 
22   * we can swap the service protocols, change their location, add new protocols and
23   * make them available dynamically, etc. without having to touch the application code 
24   * here.
25   *
26   * @author Nirmal Mukhi (nmukhi@us.ibm.com)
27   */
28  
29  // types for address book service
30  import ejb.service.addressbook.wsifservice.AddressBook;
31  import ejb.service.addressbook.wsiftypes.Address;
32  
33  // types for Zip2Geo service
34  import complexsoap.client.stub.com.cdyne.ws.LatLongReturn;
35  import complexsoap.client.stub.com.cdyne.ws.Zip2GeoSoap;
36  
37  // types for service availability service
38  import jms.client.stub.org.apache.xml.CheckAvailabilityPortType;
39  
40  // wsif classes
41  import org.apache.wsif.WSIFException;
42  import org.apache.wsif.WSIFService;
43  import org.apache.wsif.WSIFServiceFactory;
44  import javax.xml.namespace.QName  ;
45  
46  // java IO classes
47  import java.io.LineNumberReader  ;
48  import java.io.InputStreamReader  ;
49  
50  public class ServiceChecker {
51      static AddressBook addressBook;
52      static Zip2GeoSoap zip2geo;
53      static CheckAvailabilityPortType serviceAvailability;
54  
55      public static void printError(String   message) {
56      System.err.println(message);
57      System.exit(1);
58      }
59  
60      public static void printUsage() {
61      System.out.println("java dslprovider.ServiceChecker <zip2geo service WSDL>"+
62                 "<addressbook service WSDL> <serviceAvailability service WSDL>");
63      }
64  
65      private static void init(String   zip2geoWSDL,
66                   String   addressbookWSDL,
67                   String   serviceAvailabilityWSDL) throws Exception   {
68      // create a service factory
69      WSIFServiceFactory factory = WSIFServiceFactory.newInstance();
70      // initialize the address book stub
71      // parse the WSDL
72      WSIFService service =
73          factory.getService(addressbookWSDL,null,null,
74                     "http://wsifservice.addressbook/",
75                     "AddressBook");
76      // create the stub
77      addressBook = (AddressBook) service.getStub(AddressBook.class);
78      // initialize the zip2geo stub
79      // parse the WSDL
80      service = factory.getService(zip2geoWSDL,null,null,"http://ws.cdyne.com",
81                       "Zip2GeoSoap");
82      // map types
83      service.mapType(new QName  ("http://ws.cdyne.com", "LatLongReturn"),
84              Class.forName("complexsoap.client.stub.com.cdyne.ws.LatLongReturn"));
85      // create the stub
86      zip2geo = (Zip2GeoSoap) service.getStub(Zip2GeoSoap.class);
87      // initialize the service availability stub
88      // parse the WSDL
89      service = factory.getService(serviceAvailabilityWSDL,null,null,
90                       "http://xml.apache.org/axis/wsif/samples/jms/ServiceAvailability",
91                       "CheckAvailabilityPortType");
92      // create the stub
93      serviceAvailability = 
94          (CheckAvailabilityPortType) service.getStub(CheckAvailabilityPortType.class);
95      }
96  
97      private static Address lookupAddress(String   name) throws Exception   { 
98      // lookup and return the address for that name
99      return addressBook.getAddressFromName(name);
100     }
101 
102     private static Address createAndAddAddress(String   name,String   streetNum, String   streetName,
103                 String   city, String   state, String   zip) throws Exception   { 
104     // create an address
105     Address address = new Address();
106     address.setStreetNum(new Integer  (streetNum).intValue());
107     address.setStreetName(streetName);
108     address.setCity(city);
109     address.setState(state);
110     address.setZip(new Integer  (zip).intValue());
111     address.setPhoneNumber(null);
112     // add an entry to the addressbook
113     addressBook.addEntry(name,address);
114     return address;
115     }
116 
117     private static void verifyAddress(Address address) throws Exception   { 
118     // extract the zip code from the address
119     String   zipCode = ""+address.getZip();
120     // look up information for that zip
121     LatLongReturn zipInfo = zip2geo.GetLatLong(zipCode,"");
122     if (!zipInfo.getCity().equals(address.getCity())) {
123         printError("Zip "+zipCode+" is in city "+zipInfo.getCity()+
124                ", not city "+address.getCity()+" as you specified");
125     }
126     if (!zipInfo.getStateAbbrev().equals(address.getState())) {
127         printError("Zip "+zipCode+" is in state "+zipInfo.getStateAbbrev()+
128                ", not state "+address.getState()+" as you specified");
129     }
130     }   
131 
132     private static String   serviceIsAvailable(int zipCode) throws Exception   { 
133     return serviceAvailability.checkAvailability(""+zipCode);
134     }
135 
136     private static void loopInput() {
137     try {
138         System.out.println("************************");
139         System.out.println("WELCOME TO FAST DSL INC.");
140         System.out.println("************************");
141         System.out.println("\n\nInterested in DSL service? Enter your address "+
142                    "in the form below and we will check whether we have "+
143                    "service available in your area.");
144         System.out.println();
145         System.out.println("If you have previously expressed interest, just enter "+
146                    "your name (leave other fields blank) and we will look "+
147                    "up the rest of the information "+
148                    "in our records");
149         LineNumberReader   reader = new LineNumberReader  (new InputStreamReader  (System.in));
150         System.out.print("Name: ");
151         String   name = reader.readLine();
152         System.out.print("Street Number: ");
153         String   streetNum = reader.readLine();
154         System.out.print("Street Name: ");
155         String   streetName = reader.readLine();
156         System.out.print("City: ");
157         String   city = reader.readLine();
158         System.out.print("State: ");
159         String   state = reader.readLine();
160         System.out.print("Zip: ");
161         String   zip = reader.readLine();
162         System.out.println();
163         System.out.println();
164         Address address = null;
165         // if street is blank, look for name in addressbook service
166         // otherwise assume this is a new user and add information to addressbook
167         if (streetName==null || streetName.equals("")) {
168         System.out.println("Looking up address...");
169         address = lookupAddress(name);
170         if (address==null) {
171             // if address wasn't found, we have a problem
172             printError("Address for "+name+" wasn't found");
173         }
174         } else {
175         // create address from provided information and add to address book
176         System.out.println("Adding address to records...");
177         address = createAndAddAddress(name,streetNum,streetName,city,state,zip);
178         }
179         // verify that address is correct
180         System.out.println();
181         System.out.println();
182         System.out.println("Verifying validity of address...");
183         verifyAddress(address);
184         System.out.println();
185         System.out.println();
186         // check if we offer DSL service in that zip code
187         System.out.println("Customer: "+name);
188         System.out.println("Address: "+
189                    address.getStreetNum()
190                    + " "
191                    + address.getStreetName()
192                    + ", "
193                    + address.getCity()
194                    + " "
195                    + address.getState()
196                    + " "
197                    + address.getZip());
198         System.out.println("Checking service availability...");
199         if (serviceIsAvailable(address.getZip()).equals("true")) {
200         System.out.println("Yes, we offer service in your area,"+
201                    "please call 800 555 FST-DSL to order");
202         } else {
203         System.out.println("No, we do not offer service in your area");
204         }
205         System.out.println();
206         System.out.println();
207         System.out.println("Enter 'q' to quit, any other key continue...");
208         String   choice = reader.readLine();
209         if (choice.equals("q"))
210         System.exit(0);
211     } catch (Exception   e) {
212         System.out.println("ServiceChecker application got exception "+e);
213         System.out.println("Details:");
214         e.printStackTrace();
215     }
216     }   
217 
218     public static void main(String   [] args) {
219     try {
220         // we must have three args
221         // args[0] is the location of the Zip2Geo service WSDL
222         // args[1] is the location of the AddressBook service WSDL
223         // args[2] is the location of the ServiceAvailability service WSDL
224         if (args.length!=3) {
225         printUsage();
226         System.exit(1);
227         }
228         init(args[0],args[1],args[2]);
229     } catch (Exception   e) {
230         System.out.println("ServiceChecker application got exception "+e);
231         System.out.println("Details:");
232         e.printStackTrace();
233     }
234     while(true)
235         loopInput();
236     }
237 }
238
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