Abdujaparov
17-05-2008, 07:51
Salve a tutti, sto iniziando a studiare come creare dei web service con axis2 ma mi sto imbattendo in alcuni problemi.
Ho creato la classe che definisce le operazioni rese disponibili dal web service, la classe è la seguente:
package samples.quickstart.service.pojo;
import samples.quickstart.service.pojo.Util.Prodotto;
import java.util.*;
public class StockQuoteService {
private HashMap map = new HashMap ();
public double getPrice(String symbol){
Double price = (Double) map.get(symbol);
if(price!=null)
return price.doubleValue();
return 42.0;
}
public void update(String symbol, double price){
map.put(symbol, new Double(price));
}
public Prodotto[] getCatalogo(){
Prodotto[] catalogo = new Prodotto[map.size()];
Set chiavi = map.keySet();
Iterator it = chiavi.iterator();
for(int i=0; i< chiavi.size(); i++){
String key=(String)it.next();
catalogo[i]= new Prodotto(key, ((Double) map.get(key)).doubleValue());
}
return catalogo;
}
}
In particolare l'ultima operazione (getCatalogo) utilizza una classe che ho definito io.
Detto ciò ho generato il pacchetto aar da installare su tomcat (tramite il tool di eclipse "Axis2 service archive") ed ho installato il web service ottenendo questo file wsdl:
<?xml version="1.0" encoding="UTF-8"?>
<wsdl:definitions xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:ns1="http://org.apache.axis2/xsd" xmlns:ns="http://pojo.service.quickstart.samples" xmlns:wsaw="http://www.w3.org/2006/05/addressing/wsdl" xmlns:http="http://schemas.xmlsoap.org/wsdl/http/" xmlns:ax21="http://Util.pojo.service.quickstart.samples/xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/" targetNamespace="http://pojo.service.quickstart.samples">
<wsdl:documentation>StockQuoteService</wsdl:documentation>
<wsdl:types>
<xs:schema xmlns:ax22="http://Util.pojo.service.quickstart.samples/xsd" attributeFormDefault="qualified" elementFormDefault="qualified" targetNamespace="http://pojo.service.quickstart.samples">
<xs:import namespace="http://Util.pojo.service.quickstart.samples/xsd"/>
<xs:element name="getPrice">
<xs:complexType>
<xs:sequence>
<xs:element minOccurs="0" name="symbol" nillable="true" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="getPriceResponse">
<xs:complexType>
<xs:sequence>
<xs:element minOccurs="0" name="return" type="xs:double"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="getCatalogoResponse">
<xs:complexType>
<xs:sequence>
<xs:element maxOccurs="unbounded" minOccurs="0" name="return" nillable="true" type="ax22:Prodotto"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="update">
<xs:complexType>
<xs:sequence>
<xs:element minOccurs="0" name="symbol" nillable="true" type="xs:string"/>
<xs:element minOccurs="0" name="price" type="xs:double"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
<xs:schema attributeFormDefault="qualified" elementFormDefault="qualified" targetNamespace="http://Util.pojo.service.quickstart.samples/xsd">
<xs:complexType name="Prodotto">
<xs:sequence>
<xs:element minOccurs="0" name="nome" nillable="true" type="xs:string"/>
<xs:element minOccurs="0" name="prezzo" type="xs:double"/>
</xs:sequence>
</xs:complexType>
</xs:schema>
</wsdl:types>
<wsdl:message name="getPriceRequest">
<wsdl:part name="parameters" element="ns:getPrice"/>
</wsdl:message>
<wsdl:message name="getPriceResponse">
<wsdl:part name="parameters" element="ns:getPriceResponse"/>
</wsdl:message>
<wsdl:message name="getCatalogoRequest"/>
<wsdl:message name="getCatalogoResponse">
<wsdl:part name="parameters" element="ns:getCatalogoResponse"/>
</wsdl:message>
<wsdl:message name="updateRequest">
<wsdl:part name="parameters" element="ns:update"/>
</wsdl:message>
<wsdl:portType name="StockQuoteServicePortType">
<wsdl:operation name="getPrice">
<wsdl:input message="ns:getPriceRequest" wsaw:Action="urn:getPrice"/>
<wsdl:output message="ns:getPriceResponse" wsaw:Action="urn:getPriceResponse"/>
</wsdl:operation>
<wsdl:operation name="getCatalogo">
<wsdl:input message="ns:getCatalogoRequest" wsaw:Action="urn:getCatalogo"/>
<wsdl:output message="ns:getCatalogoResponse" wsaw:Action="urn:getCatalogoResponse"/>
</wsdl:operation>
<wsdl:operation name="update">
<wsdl:input message="ns:updateRequest" wsaw:Action="urn:update"/>
</wsdl:operation>
</wsdl:portType>
<wsdl:binding name="StockQuoteServiceSoap11Binding" type="ns:StockQuoteServicePortType">
<soap:binding transport="http://schemas.xmlsoap.org/soap/http" style="document"/>
<wsdl:operation name="getPrice">
<soap:operation soapAction="urn:getPrice" style="document"/>
<wsdl:input>
<soap:body use="literal"/>
</wsdl:input>
<wsdl:output>
<soap:body use="literal"/>
</wsdl:output>
</wsdl:operation>
<wsdl:operation name="getCatalogo">
<soap:operation soapAction="urn:getCatalogo" style="document"/>
<wsdl:input>
<soap:body use="literal"/>
</wsdl:input>
<wsdl:output>
<soap:body use="literal"/>
</wsdl:output>
</wsdl:operation>
<wsdl:operation name="update">
<soap:operation soapAction="urn:update" style="document"/>
<wsdl:input>
<soap:body use="literal"/>
</wsdl:input>
</wsdl:operation>
</wsdl:binding>
<wsdl:binding name="StockQuoteServiceSoap12Binding" type="ns:StockQuoteServicePortType">
<soap12:binding transport="http://schemas.xmlsoap.org/soap/http" style="document"/>
<wsdl:operation name="getPrice">
<soap12:operation soapAction="urn:getPrice" style="document"/>
<wsdl:input>
<soap12:body use="literal"/>
</wsdl:input>
<wsdl:output>
<soap12:body use="literal"/>
</wsdl:output>
</wsdl:operation>
<wsdl:operation name="getCatalogo">
<soap12:operation soapAction="urn:getCatalogo" style="document"/>
<wsdl:input>
<soap12:body use="literal"/>
</wsdl:input>
<wsdl:output>
<soap12:body use="literal"/>
</wsdl:output>
</wsdl:operation>
<wsdl:operation name="update">
<soap12:operation soapAction="urn:update" style="document"/>
<wsdl:input>
<soap12:body use="literal"/>
</wsdl:input>
</wsdl:operation>
</wsdl:binding>
<wsdl:binding name="StockQuoteServiceHttpBinding" type="ns:StockQuoteServicePortType">
<http:binding verb="POST"/>
<wsdl:operation name="getPrice">
<http:operation location="StockQuoteService/getPrice"/>
<wsdl:input>
<mime:content type="text/xml" part="getPrice"/>
</wsdl:input>
<wsdl:output>
<mime:content type="text/xml" part="getPrice"/>
</wsdl:output>
</wsdl:operation>
<wsdl:operation name="getCatalogo">
<http:operation location="StockQuoteService/getCatalogo"/>
<wsdl:input>
<mime:content type="text/xml" part="getCatalogo"/>
</wsdl:input>
<wsdl:output>
<mime:content type="text/xml" part="getCatalogo"/>
</wsdl:output>
</wsdl:operation>
<wsdl:operation name="update">
<http:operation location="StockQuoteService/update"/>
<wsdl:input>
<mime:content type="text/xml" part="update"/>
</wsdl:input>
</wsdl:operation>
</wsdl:binding>
<wsdl:service name="StockQuoteService">
<wsdl:port name="StockQuoteServiceHttpSoap11Endpoint" binding="ns:StockQuoteServiceSoap11Binding">
<soap:address location="http://192.168.1.2:8080/axis2/services/StockQuoteService.StockQuoteServiceHttpSoap11Endpoint"/>
</wsdl:port>
<wsdl:port name="StockQuoteServiceHttpSoap12Endpoint" binding="ns:StockQuoteServiceSoap12Binding">
<soap12:address location="http://192.168.1.2:8080/axis2/services/StockQuoteService.StockQuoteServiceHttpSoap12Endpoint"/>
</wsdl:port>
<wsdl:port name="StockQuoteServiceHttpEndpoint" binding="ns:StockQuoteServiceHttpBinding">
<http:address location="http://192.168.1.2:8080/axis2/services/StockQuoteService.StockQuoteServiceHttpEndpoint"/>
</wsdl:port>
</wsdl:service>
</wsdl:definitions>
A questo punto provo a generare le classi per il client ma ottengo questo errore:
angelo@angelo-laptop:~$ wsdl2java.sh -uri http://127.0.0.1:8080/axis2/services/StockQuoteService?wsdl -p samples.ws.client
Using AXIS2_HOME: /home/angelo/axis2-1.4
Using JAVA_HOME: /usr/lib/jvm/java-6-sun
Retrieving document at 'http://127.0.0.1:8080/axis2/services/StockQuoteService?wsdl'.
Exception in thread "main" org.apache.axis2.wsdl.codegen.CodeGenerationException: java.lang.NullPointerException
at org.apache.axis2.wsdl.codegen.CodeGenerationEngine.generate(CodeGenerationEngine.java:271)
at org.apache.axis2.wsdl.WSDL2Code.main(WSDL2Code.java:35)
at org.apache.axis2.wsdl.WSDL2Java.main(WSDL2Java.java:24)
Caused by: java.lang.NullPointerException
at org.apache.axis2.wsdl.codegen.extension.JavaPrettyPrinterExtension.prettify(JavaPrettyPrinterExtension.java:50)
at org.apache.axis2.wsdl.codegen.extension.JavaPrettyPrinterExtension.prettify(JavaPrettyPrinterExtension.java:51)
at org.apache.axis2.wsdl.codegen.extension.AbstractPrettyPrinterExtension.engage(AbstractPrettyPrinterExtension.java:37)
at org.apache.axis2.wsdl.codegen.CodeGenerationEngine.generate(CodeGenerationEngine.java:265)
... 2 more
Nonostante l'errore vengono generate due classi: StockQuoteServiceStub.java e StockQuoteServiceCallbackHandler.java. Se provo ad utilizzare ugualmente quelle classi riesco ad invocare correttamente getPrice, invoco l'operazione update solo che se dopo invoco un getPrice l'update sembra non aver sortito nessun effetto.
Quando invece provo ad invocare getCatalogo come risposta dal web service ottengo null.
Di seguito incollo il client che ho scritto con l'output che mi viene dato:
import java.rmi.RemoteException;
import org.apache.axis2.AxisFault;
import test.ws.client.StockQuoteServiceStub;
import test.ws.client.StockQuoteServiceStub.GetPrice;
import test.ws.client.StockQuoteServiceStub.GetPriceResponse;
import test.ws.client.StockQuoteServiceStub.GetCatalogoResponse;
import test.ws.client.StockQuoteServiceStub.Prodotto;
import test.ws.client.StockQuoteServiceStub.Update;
public class X {
private StockQuoteServiceStub sqss;
public X() throws AxisFault {
sqss = new StockQuoteServiceStub();
}
public static void main(String[] args) throws RemoteException {
X classe = new X();
classe.update("fiat", 50.0);
classe.update("opel", 72.2);
classe.update("mercedes", 100);
System.out.println(classe.getPriceW("fiat"));
System.out.println(classe.getPriceW("mercedes"));
System.out.println(classe.getPriceW("skoda"));
System.out.println(classe.getPriceW("opel"));
Prodotto[] ps = classe.getCatalogo();
for(int i=0; i<ps.length; i++)
System.out.println("Catalogo"+ps[i].getNome()+", "+ps[i].getPrezzo());
}
public double getPriceW(String nome) throws RemoteException{
GetPrice parametro = new GetPrice();
parametro.setSymbol(nome);
GetPriceResponse grp = sqss.getPrice(parametro);
return grp.get_return();
}
public void update(String nome, double prezzo) throws RemoteException{
Update imp = new Update();
imp.setSymbol(nome);
imp.setPrice(prezzo);
sqss.update(imp);
}
public Prodotto[] getCatalogo() throws RemoteException{
GetCatalogoResponse risposta = sqss.getCatalogo();
Prodotto[] catalogo = risposta.get_return();
return catalogo;
}
}
L'output è questo:
log4j:WARN No appenders could be found for logger (org.apache.axis2.description.AxisService).
log4j:WARN Please initialize the log4j system properly.
42.0
42.0
42.0
42.0
Exception in thread "main" java.lang.NullPointerException
at X.main(X.java:42)
Cosa completamente sbagliata, dato che 42 mi deve venir tornato solamente se il prodotto non è inserito nella HashMap definita nel web service.
Perchè un comportamento simile? Cosa sbaglio?
Un'ultima cosa, per generare le classi stub ho installato anche il plug-in per eclipse di axis2 (Axis2 code generator), ma questo tool a quanto ho potuto notare non mi funziona mai e non mi da mai nessun file in output mi da un messaggio d'errore:
An error occurred while completing process - java.lang.reflect.invocationTargetException
Questo lo ottengo anche se scrivo un altro web service con una sola operazione che fa un'addizione, a questo punto penso sia un problema del plug-in o sbaglio?
Grazie a tutti.
Ciao ciao
Ho creato la classe che definisce le operazioni rese disponibili dal web service, la classe è la seguente:
package samples.quickstart.service.pojo;
import samples.quickstart.service.pojo.Util.Prodotto;
import java.util.*;
public class StockQuoteService {
private HashMap map = new HashMap ();
public double getPrice(String symbol){
Double price = (Double) map.get(symbol);
if(price!=null)
return price.doubleValue();
return 42.0;
}
public void update(String symbol, double price){
map.put(symbol, new Double(price));
}
public Prodotto[] getCatalogo(){
Prodotto[] catalogo = new Prodotto[map.size()];
Set chiavi = map.keySet();
Iterator it = chiavi.iterator();
for(int i=0; i< chiavi.size(); i++){
String key=(String)it.next();
catalogo[i]= new Prodotto(key, ((Double) map.get(key)).doubleValue());
}
return catalogo;
}
}
In particolare l'ultima operazione (getCatalogo) utilizza una classe che ho definito io.
Detto ciò ho generato il pacchetto aar da installare su tomcat (tramite il tool di eclipse "Axis2 service archive") ed ho installato il web service ottenendo questo file wsdl:
<?xml version="1.0" encoding="UTF-8"?>
<wsdl:definitions xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:ns1="http://org.apache.axis2/xsd" xmlns:ns="http://pojo.service.quickstart.samples" xmlns:wsaw="http://www.w3.org/2006/05/addressing/wsdl" xmlns:http="http://schemas.xmlsoap.org/wsdl/http/" xmlns:ax21="http://Util.pojo.service.quickstart.samples/xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/" targetNamespace="http://pojo.service.quickstart.samples">
<wsdl:documentation>StockQuoteService</wsdl:documentation>
<wsdl:types>
<xs:schema xmlns:ax22="http://Util.pojo.service.quickstart.samples/xsd" attributeFormDefault="qualified" elementFormDefault="qualified" targetNamespace="http://pojo.service.quickstart.samples">
<xs:import namespace="http://Util.pojo.service.quickstart.samples/xsd"/>
<xs:element name="getPrice">
<xs:complexType>
<xs:sequence>
<xs:element minOccurs="0" name="symbol" nillable="true" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="getPriceResponse">
<xs:complexType>
<xs:sequence>
<xs:element minOccurs="0" name="return" type="xs:double"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="getCatalogoResponse">
<xs:complexType>
<xs:sequence>
<xs:element maxOccurs="unbounded" minOccurs="0" name="return" nillable="true" type="ax22:Prodotto"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="update">
<xs:complexType>
<xs:sequence>
<xs:element minOccurs="0" name="symbol" nillable="true" type="xs:string"/>
<xs:element minOccurs="0" name="price" type="xs:double"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
<xs:schema attributeFormDefault="qualified" elementFormDefault="qualified" targetNamespace="http://Util.pojo.service.quickstart.samples/xsd">
<xs:complexType name="Prodotto">
<xs:sequence>
<xs:element minOccurs="0" name="nome" nillable="true" type="xs:string"/>
<xs:element minOccurs="0" name="prezzo" type="xs:double"/>
</xs:sequence>
</xs:complexType>
</xs:schema>
</wsdl:types>
<wsdl:message name="getPriceRequest">
<wsdl:part name="parameters" element="ns:getPrice"/>
</wsdl:message>
<wsdl:message name="getPriceResponse">
<wsdl:part name="parameters" element="ns:getPriceResponse"/>
</wsdl:message>
<wsdl:message name="getCatalogoRequest"/>
<wsdl:message name="getCatalogoResponse">
<wsdl:part name="parameters" element="ns:getCatalogoResponse"/>
</wsdl:message>
<wsdl:message name="updateRequest">
<wsdl:part name="parameters" element="ns:update"/>
</wsdl:message>
<wsdl:portType name="StockQuoteServicePortType">
<wsdl:operation name="getPrice">
<wsdl:input message="ns:getPriceRequest" wsaw:Action="urn:getPrice"/>
<wsdl:output message="ns:getPriceResponse" wsaw:Action="urn:getPriceResponse"/>
</wsdl:operation>
<wsdl:operation name="getCatalogo">
<wsdl:input message="ns:getCatalogoRequest" wsaw:Action="urn:getCatalogo"/>
<wsdl:output message="ns:getCatalogoResponse" wsaw:Action="urn:getCatalogoResponse"/>
</wsdl:operation>
<wsdl:operation name="update">
<wsdl:input message="ns:updateRequest" wsaw:Action="urn:update"/>
</wsdl:operation>
</wsdl:portType>
<wsdl:binding name="StockQuoteServiceSoap11Binding" type="ns:StockQuoteServicePortType">
<soap:binding transport="http://schemas.xmlsoap.org/soap/http" style="document"/>
<wsdl:operation name="getPrice">
<soap:operation soapAction="urn:getPrice" style="document"/>
<wsdl:input>
<soap:body use="literal"/>
</wsdl:input>
<wsdl:output>
<soap:body use="literal"/>
</wsdl:output>
</wsdl:operation>
<wsdl:operation name="getCatalogo">
<soap:operation soapAction="urn:getCatalogo" style="document"/>
<wsdl:input>
<soap:body use="literal"/>
</wsdl:input>
<wsdl:output>
<soap:body use="literal"/>
</wsdl:output>
</wsdl:operation>
<wsdl:operation name="update">
<soap:operation soapAction="urn:update" style="document"/>
<wsdl:input>
<soap:body use="literal"/>
</wsdl:input>
</wsdl:operation>
</wsdl:binding>
<wsdl:binding name="StockQuoteServiceSoap12Binding" type="ns:StockQuoteServicePortType">
<soap12:binding transport="http://schemas.xmlsoap.org/soap/http" style="document"/>
<wsdl:operation name="getPrice">
<soap12:operation soapAction="urn:getPrice" style="document"/>
<wsdl:input>
<soap12:body use="literal"/>
</wsdl:input>
<wsdl:output>
<soap12:body use="literal"/>
</wsdl:output>
</wsdl:operation>
<wsdl:operation name="getCatalogo">
<soap12:operation soapAction="urn:getCatalogo" style="document"/>
<wsdl:input>
<soap12:body use="literal"/>
</wsdl:input>
<wsdl:output>
<soap12:body use="literal"/>
</wsdl:output>
</wsdl:operation>
<wsdl:operation name="update">
<soap12:operation soapAction="urn:update" style="document"/>
<wsdl:input>
<soap12:body use="literal"/>
</wsdl:input>
</wsdl:operation>
</wsdl:binding>
<wsdl:binding name="StockQuoteServiceHttpBinding" type="ns:StockQuoteServicePortType">
<http:binding verb="POST"/>
<wsdl:operation name="getPrice">
<http:operation location="StockQuoteService/getPrice"/>
<wsdl:input>
<mime:content type="text/xml" part="getPrice"/>
</wsdl:input>
<wsdl:output>
<mime:content type="text/xml" part="getPrice"/>
</wsdl:output>
</wsdl:operation>
<wsdl:operation name="getCatalogo">
<http:operation location="StockQuoteService/getCatalogo"/>
<wsdl:input>
<mime:content type="text/xml" part="getCatalogo"/>
</wsdl:input>
<wsdl:output>
<mime:content type="text/xml" part="getCatalogo"/>
</wsdl:output>
</wsdl:operation>
<wsdl:operation name="update">
<http:operation location="StockQuoteService/update"/>
<wsdl:input>
<mime:content type="text/xml" part="update"/>
</wsdl:input>
</wsdl:operation>
</wsdl:binding>
<wsdl:service name="StockQuoteService">
<wsdl:port name="StockQuoteServiceHttpSoap11Endpoint" binding="ns:StockQuoteServiceSoap11Binding">
<soap:address location="http://192.168.1.2:8080/axis2/services/StockQuoteService.StockQuoteServiceHttpSoap11Endpoint"/>
</wsdl:port>
<wsdl:port name="StockQuoteServiceHttpSoap12Endpoint" binding="ns:StockQuoteServiceSoap12Binding">
<soap12:address location="http://192.168.1.2:8080/axis2/services/StockQuoteService.StockQuoteServiceHttpSoap12Endpoint"/>
</wsdl:port>
<wsdl:port name="StockQuoteServiceHttpEndpoint" binding="ns:StockQuoteServiceHttpBinding">
<http:address location="http://192.168.1.2:8080/axis2/services/StockQuoteService.StockQuoteServiceHttpEndpoint"/>
</wsdl:port>
</wsdl:service>
</wsdl:definitions>
A questo punto provo a generare le classi per il client ma ottengo questo errore:
angelo@angelo-laptop:~$ wsdl2java.sh -uri http://127.0.0.1:8080/axis2/services/StockQuoteService?wsdl -p samples.ws.client
Using AXIS2_HOME: /home/angelo/axis2-1.4
Using JAVA_HOME: /usr/lib/jvm/java-6-sun
Retrieving document at 'http://127.0.0.1:8080/axis2/services/StockQuoteService?wsdl'.
Exception in thread "main" org.apache.axis2.wsdl.codegen.CodeGenerationException: java.lang.NullPointerException
at org.apache.axis2.wsdl.codegen.CodeGenerationEngine.generate(CodeGenerationEngine.java:271)
at org.apache.axis2.wsdl.WSDL2Code.main(WSDL2Code.java:35)
at org.apache.axis2.wsdl.WSDL2Java.main(WSDL2Java.java:24)
Caused by: java.lang.NullPointerException
at org.apache.axis2.wsdl.codegen.extension.JavaPrettyPrinterExtension.prettify(JavaPrettyPrinterExtension.java:50)
at org.apache.axis2.wsdl.codegen.extension.JavaPrettyPrinterExtension.prettify(JavaPrettyPrinterExtension.java:51)
at org.apache.axis2.wsdl.codegen.extension.AbstractPrettyPrinterExtension.engage(AbstractPrettyPrinterExtension.java:37)
at org.apache.axis2.wsdl.codegen.CodeGenerationEngine.generate(CodeGenerationEngine.java:265)
... 2 more
Nonostante l'errore vengono generate due classi: StockQuoteServiceStub.java e StockQuoteServiceCallbackHandler.java. Se provo ad utilizzare ugualmente quelle classi riesco ad invocare correttamente getPrice, invoco l'operazione update solo che se dopo invoco un getPrice l'update sembra non aver sortito nessun effetto.
Quando invece provo ad invocare getCatalogo come risposta dal web service ottengo null.
Di seguito incollo il client che ho scritto con l'output che mi viene dato:
import java.rmi.RemoteException;
import org.apache.axis2.AxisFault;
import test.ws.client.StockQuoteServiceStub;
import test.ws.client.StockQuoteServiceStub.GetPrice;
import test.ws.client.StockQuoteServiceStub.GetPriceResponse;
import test.ws.client.StockQuoteServiceStub.GetCatalogoResponse;
import test.ws.client.StockQuoteServiceStub.Prodotto;
import test.ws.client.StockQuoteServiceStub.Update;
public class X {
private StockQuoteServiceStub sqss;
public X() throws AxisFault {
sqss = new StockQuoteServiceStub();
}
public static void main(String[] args) throws RemoteException {
X classe = new X();
classe.update("fiat", 50.0);
classe.update("opel", 72.2);
classe.update("mercedes", 100);
System.out.println(classe.getPriceW("fiat"));
System.out.println(classe.getPriceW("mercedes"));
System.out.println(classe.getPriceW("skoda"));
System.out.println(classe.getPriceW("opel"));
Prodotto[] ps = classe.getCatalogo();
for(int i=0; i<ps.length; i++)
System.out.println("Catalogo"+ps[i].getNome()+", "+ps[i].getPrezzo());
}
public double getPriceW(String nome) throws RemoteException{
GetPrice parametro = new GetPrice();
parametro.setSymbol(nome);
GetPriceResponse grp = sqss.getPrice(parametro);
return grp.get_return();
}
public void update(String nome, double prezzo) throws RemoteException{
Update imp = new Update();
imp.setSymbol(nome);
imp.setPrice(prezzo);
sqss.update(imp);
}
public Prodotto[] getCatalogo() throws RemoteException{
GetCatalogoResponse risposta = sqss.getCatalogo();
Prodotto[] catalogo = risposta.get_return();
return catalogo;
}
}
L'output è questo:
log4j:WARN No appenders could be found for logger (org.apache.axis2.description.AxisService).
log4j:WARN Please initialize the log4j system properly.
42.0
42.0
42.0
42.0
Exception in thread "main" java.lang.NullPointerException
at X.main(X.java:42)
Cosa completamente sbagliata, dato che 42 mi deve venir tornato solamente se il prodotto non è inserito nella HashMap definita nel web service.
Perchè un comportamento simile? Cosa sbaglio?
Un'ultima cosa, per generare le classi stub ho installato anche il plug-in per eclipse di axis2 (Axis2 code generator), ma questo tool a quanto ho potuto notare non mi funziona mai e non mi da mai nessun file in output mi da un messaggio d'errore:
An error occurred while completing process - java.lang.reflect.invocationTargetException
Questo lo ottengo anche se scrivo un altro web service con una sola operazione che fa un'addizione, a questo punto penso sia un problema del plug-in o sbaglio?
Grazie a tutti.
Ciao ciao