Web Services Essentials

Client Code

The complete client code is shown in Example 5-12. The goal of the client code is to call the remote getCounter( ) method and retrieve the current count value.

Example 5-12. CounterClient.java

package com.ecerami.soap;

/**
 * A Sample SOAP Client
 * Retrieves Current Counter value from CounterService
 * Illustrates Session v. Application Scope
*/
import java.util.*;
import java.net.*;
import org.apache.soap.*;
import org.apache.soap.rpc.*;

public class CounterClient {
  private Call call;   // Reusable Call Object

  /**
   * Static Main method
   */
  public static void main (String[] args) {
    System.out.println ("Session/Application Counter:  SOAP Client");
    CounterClient counterClient = new CounterClient(  );
    counterClient.process(  );
  }

  /**
   * Constructor
   * Create reusable Call object
   */
  public CounterClient (  ) {
                         call = new Call(  );
                       } /** * Start counting */ public void process ( ) { try { for (int i=0; i<5; i++) { int counter = getCounter ( ); System.out.println ("Counter: "+counter); } } catch (CounterException e) { System.err.println (e); } catch (SOAPException e) { System.err.println (e); } catch (MalformedURLException e) { System.err.println (e); } } /** * getCounter Method */ public int getCounter ( ) throws SOAPException, MalformedURLException, CounterException { // Set Encoding Style to standard SOAP encoding call.setEncodingStyleURI(Constants.NS_URI_SOAP_ENC); // Set Object URI and Method Name call.setTargetObjectURI ("urn:examples:counterservice"); call.setMethodName ("getCounter"); ...