GWT GreetingService Spring Integration - Error 500
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quinton
Feb 25, 2012, 12:37:59 PM2/25/12
to gwt-sl
I'm attempting to introduce Spring into the standard GWT
GreetingService example. I keep getting HTTP Error 500. When testing
different servelet configurations would get HTTP Error 404, but once
corrected went back to HTTP Error 500.
Configuration
- GWT 2.4 in Spring STS Latest Eclipse IDE
- Spring 3.1
- GWT-SL 1.3
Using Standard GWT Plugin Demo Project with Spring Libraries Added
Resolution Steps Taken
1 - Verified Servlet and File Configurations
2 - Tried with and without Spring Annotation Based Instantiation of
RPC Service
3 - Attempted with and without Log4j Inclusion in web.xml as noted on
a couple of posts
File Data and Stack Trace at Bottom
I'm sure there is a simple oversight somewhere, but I've checked
several different configurations and haven't been able to resolve. Any
insight is appreciated.
*********** Web.xml ****************
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee">
<listener>
<listener-
class>org.springframework.web.context.ContextLoaderListener</listener-
class>
</listener>
<!-- Front Controller for all GWT-Spring based servlets -->
<servlet>
<servlet-name>gwt</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</
servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- Don't forget to declare a gwt-servlet.xml -->
<servlet-mapping>
<servlet-name>gwt</servlet-name>
<url-pattern>/testgwt/rpc/*</url-pattern>
</servlet-mapping>
</web-app>
*********** gwt-servlet.xml ****************
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">
<bean id="greetingService"
class="com.mattbragaw.testgwt.server.GreetingServiceImpl" />
<!-- The GWT handler. Pay attention to the mappings -->
<bean class="org.gwtwidgets.server.spring.GWTHandler">
<property name="mappings">
<map>
<entry key="/greet" value-ref="greetingService" />
</map>
</property>
</bean>
</beans>
*********** applicationContext.xml ****************
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd">
<!-- Activates various annotations to be detected in bean classes -->
<context:annotation-config />
<!-- Scans the classpath for annotated components that will be auto-
registered as Spring beans.
For example @Controller and @Service. Make sure to set the correct
base-package -->
<context:component-scan base-package="com.mattbragaw.testgwt" />
</beans>
*********** GreetingService,java ****************
package com.mattbragaw.testgwt.client;
import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
/**
* The client side stub for the RPC service.
*/
@RemoteServiceRelativePath("rpc/greet")
public interface GreetingService extends RemoteService {
String greetServer(String name) throws IllegalArgumentException;
}
*********** GreetingServiceAsync,java ****************
package com.mattbragaw.testgwt.client;
import com.google.gwt.user.client.rpc.AsyncCallback;
/**
* The async counterpart of <code>GreetingService</code>.
*/
public interface GreetingServiceAsync {
void greetServer(String input, AsyncCallback<String> callback)
throws IllegalArgumentException;
}
*********** GreetingServiceImpl.java ****************
package com.mattbragaw.testgwt.server;
//import org.springframework.stereotype.Service;
import com.mattbragaw.testgwt.client.GreetingService;
import com.mattbragaw.testgwt.shared.FieldVerifier;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;
/**
* The server side implementation of the RPC service.
*/
//@Service("greetingService")
public class GreetingServiceImpl extends RemoteServiceServlet
implements
GreetingService {
private static final long serialVersionUID = -7540169356902342398L;
public String greetServer(String input) throws
IllegalArgumentException {
// Verify that the input is valid.
if (!FieldVerifier.isValidName(input)) {
// If the input is not valid, throw an IllegalArgumentException
back to
// the client.
throw new IllegalArgumentException(
"Name must be at least 4 characters long");
}
String serverInfo = getServletContext().getServerInfo();
String userAgent = getThreadLocalRequest().getHeader("User-Agent");
// Escape data from the client to avoid cross-site script
vulnerabilities.
input = escapeHtml(input);
userAgent = escapeHtml(userAgent);
return "Hello, " + input + "!<br><br>I am running " + serverInfo
+ ".<br><br>It looks like you are using:<br>" + userAgent;
}
/**
* Escape an html string. Escaping data received from the client
helps to
* prevent cross-site script vulnerabilities.
*
* @param html the html string to escape
* @return the escaped string
*/
private String escapeHtml(String html) {
if (html == null) {
return null;
}
return html.replaceAll("&", "&").replaceAll("<", "<")
.replaceAll(">", ">");
}
}
*********** JETTY STACK TRACE ON ERROR 500 ****************
SEVERE: javax.servlet.ServletContext log: Exception while dispatching
incoming RPC call
java.lang.RuntimeException:
com.google.gwt.user.server.rpc.UnexpectedException: Service method
'public abstract java.lang.String
com.mattbragaw.testgwt.client.GreetingService.greetServer(java.lang.String)
throws java.lang.IllegalArgumentException' threw an unexpected
exception: java.lang.NullPointerException
at
org.gwtwidgets.server.spring.GWTRPCServiceExporter.handleExporterProcessingException(GWTRPCServiceExporter.java:
456)
at
org.gwtwidgets.server.spring.GWTRPCServiceExporter.processCall(GWTRPCServiceExporter.java:
425)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:
248)
at
com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:
62)
at
org.gwtwidgets.server.spring.GWTRPCServiceExporter.handleRequest(GWTRPCServiceExporter.java:
478)
at
org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:
48)
at
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:
900)
at
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:
827)
at
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:
882)
at
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:
789)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
511)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1166)
at
com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:
35)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:
60)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:
43)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:
122)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:
97)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
388)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
182)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
418)
at
com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
78)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
at com.google.appengine.tools.development.JettyContainerService
$ApiProxyHandler.handle(JettyContainerService.java:362)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
542)
at org.mortbay.jetty.HttpConnection
$RequestHandler.content(HttpConnection.java:938)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
409)
at org.mortbay.thread.QueuedThreadPool
$PoolThread.run(QueuedThreadPool.java:582)
Caused by: com.google.gwt.user.server.rpc.UnexpectedException: Service
method 'public abstract java.lang.String
com.mattbragaw.testgwt.client.GreetingService.greetServer(java.lang.String)
throws java.lang.IllegalArgumentException' threw an unexpected
exception: java.lang.NullPointerException
at
com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:
385)
at
org.gwtwidgets.server.spring.GWTRPCServiceExporter.encodeResponseForFailure(GWTRPCServiceExporter.java:
302)
at
org.gwtwidgets.server.spring.GWTRPCServiceExporter.handleInvocationTargetException(GWTRPCServiceExporter.java:
327)
at
org.gwtwidgets.server.spring.GWTRPCServiceExporter.processCall(GWTRPCServiceExporter.java:
416)
... 39 more
Caused by: java.lang.NullPointerException
at javax.servlet.GenericServlet.getServletContext(GenericServlet.java:
160)
at
com.mattbragaw.testgwt.server.GreetingServiceImpl.greetServer(GreetingServiceImpl.java:
27)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:
104)
at
org.gwtwidgets.server.spring.GWTRPCServiceExporter.invokeMethodOnService(GWTRPCServiceExporter.java:
245)
at
org.gwtwidgets.server.spring.GWTRPCServiceExporter.processCall(GWTRPCServiceExporter.java:
410)
... 39 more
GreetingService example. I keep getting HTTP Error 500. When testing
different servelet configurations would get HTTP Error 404, but once
corrected went back to HTTP Error 500.
Configuration
- GWT 2.4 in Spring STS Latest Eclipse IDE
- Spring 3.1
- GWT-SL 1.3
Using Standard GWT Plugin Demo Project with Spring Libraries Added
Resolution Steps Taken
1 - Verified Servlet and File Configurations
2 - Tried with and without Spring Annotation Based Instantiation of
RPC Service
3 - Attempted with and without Log4j Inclusion in web.xml as noted on
a couple of posts
File Data and Stack Trace at Bottom
I'm sure there is a simple oversight somewhere, but I've checked
several different configurations and haven't been able to resolve. Any
insight is appreciated.
*********** Web.xml ****************
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee">
<listener>
<listener-
class>org.springframework.web.context.ContextLoaderListener</listener-
class>
</listener>
<!-- Front Controller for all GWT-Spring based servlets -->
<servlet>
<servlet-name>gwt</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</
servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- Don't forget to declare a gwt-servlet.xml -->
<servlet-mapping>
<servlet-name>gwt</servlet-name>
<url-pattern>/testgwt/rpc/*</url-pattern>
</servlet-mapping>
</web-app>
*********** gwt-servlet.xml ****************
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">
<bean id="greetingService"
class="com.mattbragaw.testgwt.server.GreetingServiceImpl" />
<!-- The GWT handler. Pay attention to the mappings -->
<bean class="org.gwtwidgets.server.spring.GWTHandler">
<property name="mappings">
<map>
<entry key="/greet" value-ref="greetingService" />
</map>
</property>
</bean>
</beans>
*********** applicationContext.xml ****************
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd">
<!-- Activates various annotations to be detected in bean classes -->
<context:annotation-config />
<!-- Scans the classpath for annotated components that will be auto-
registered as Spring beans.
For example @Controller and @Service. Make sure to set the correct
base-package -->
<context:component-scan base-package="com.mattbragaw.testgwt" />
</beans>
*********** GreetingService,java ****************
package com.mattbragaw.testgwt.client;
import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
/**
* The client side stub for the RPC service.
*/
@RemoteServiceRelativePath("rpc/greet")
public interface GreetingService extends RemoteService {
String greetServer(String name) throws IllegalArgumentException;
}
*********** GreetingServiceAsync,java ****************
package com.mattbragaw.testgwt.client;
import com.google.gwt.user.client.rpc.AsyncCallback;
/**
* The async counterpart of <code>GreetingService</code>.
*/
public interface GreetingServiceAsync {
void greetServer(String input, AsyncCallback<String> callback)
throws IllegalArgumentException;
}
*********** GreetingServiceImpl.java ****************
package com.mattbragaw.testgwt.server;
//import org.springframework.stereotype.Service;
import com.mattbragaw.testgwt.client.GreetingService;
import com.mattbragaw.testgwt.shared.FieldVerifier;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;
/**
* The server side implementation of the RPC service.
*/
//@Service("greetingService")
public class GreetingServiceImpl extends RemoteServiceServlet
implements
GreetingService {
private static final long serialVersionUID = -7540169356902342398L;
public String greetServer(String input) throws
IllegalArgumentException {
// Verify that the input is valid.
if (!FieldVerifier.isValidName(input)) {
// If the input is not valid, throw an IllegalArgumentException
back to
// the client.
throw new IllegalArgumentException(
"Name must be at least 4 characters long");
}
String serverInfo = getServletContext().getServerInfo();
String userAgent = getThreadLocalRequest().getHeader("User-Agent");
// Escape data from the client to avoid cross-site script
vulnerabilities.
input = escapeHtml(input);
userAgent = escapeHtml(userAgent);
return "Hello, " + input + "!<br><br>I am running " + serverInfo
+ ".<br><br>It looks like you are using:<br>" + userAgent;
}
/**
* Escape an html string. Escaping data received from the client
helps to
* prevent cross-site script vulnerabilities.
*
* @param html the html string to escape
* @return the escaped string
*/
private String escapeHtml(String html) {
if (html == null) {
return null;
}
return html.replaceAll("&", "&").replaceAll("<", "<")
.replaceAll(">", ">");
}
}
*********** JETTY STACK TRACE ON ERROR 500 ****************
SEVERE: javax.servlet.ServletContext log: Exception while dispatching
incoming RPC call
java.lang.RuntimeException:
com.google.gwt.user.server.rpc.UnexpectedException: Service method
'public abstract java.lang.String
com.mattbragaw.testgwt.client.GreetingService.greetServer(java.lang.String)
throws java.lang.IllegalArgumentException' threw an unexpected
exception: java.lang.NullPointerException
at
org.gwtwidgets.server.spring.GWTRPCServiceExporter.handleExporterProcessingException(GWTRPCServiceExporter.java:
456)
at
org.gwtwidgets.server.spring.GWTRPCServiceExporter.processCall(GWTRPCServiceExporter.java:
425)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:
248)
at
com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:
62)
at
org.gwtwidgets.server.spring.GWTRPCServiceExporter.handleRequest(GWTRPCServiceExporter.java:
478)
at
org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:
48)
at
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:
900)
at
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:
827)
at
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:
882)
at
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:
789)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
511)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1166)
at
com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:
35)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:
60)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:
43)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:
122)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:
97)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
388)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
182)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
418)
at
com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
78)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
at com.google.appengine.tools.development.JettyContainerService
$ApiProxyHandler.handle(JettyContainerService.java:362)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
542)
at org.mortbay.jetty.HttpConnection
$RequestHandler.content(HttpConnection.java:938)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
409)
at org.mortbay.thread.QueuedThreadPool
$PoolThread.run(QueuedThreadPool.java:582)
Caused by: com.google.gwt.user.server.rpc.UnexpectedException: Service
method 'public abstract java.lang.String
com.mattbragaw.testgwt.client.GreetingService.greetServer(java.lang.String)
throws java.lang.IllegalArgumentException' threw an unexpected
exception: java.lang.NullPointerException
at
com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:
385)
at
org.gwtwidgets.server.spring.GWTRPCServiceExporter.encodeResponseForFailure(GWTRPCServiceExporter.java:
302)
at
org.gwtwidgets.server.spring.GWTRPCServiceExporter.handleInvocationTargetException(GWTRPCServiceExporter.java:
327)
at
org.gwtwidgets.server.spring.GWTRPCServiceExporter.processCall(GWTRPCServiceExporter.java:
416)
... 39 more
Caused by: java.lang.NullPointerException
at javax.servlet.GenericServlet.getServletContext(GenericServlet.java:
160)
at
com.mattbragaw.testgwt.server.GreetingServiceImpl.greetServer(GreetingServiceImpl.java:
27)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:
104)
at
org.gwtwidgets.server.spring.GWTRPCServiceExporter.invokeMethodOnService(GWTRPCServiceExporter.java:
245)
at
org.gwtwidgets.server.spring.GWTRPCServiceExporter.processCall(GWTRPCServiceExporter.java:
410)
... 39 more
George Georgovassilis
Feb 25, 2012, 2:31:27 PM2/25/12
to gwt-sl
Hi Matt!
The good news is that you are almost there: the request passes through
the servlet container to spring and finds GreetingServiceImpl. The SL
transforms POJOs at runtime into RPC services, thus you don't need to
(and actually shouldn't) extend RemoteServiceServlet. As a matter of
fact you don't have to extend any class. If you need access to the
servlet API have a look at the ServletUtils class. I hope that helps,
G.
The good news is that you are almost there: the request passes through
the servlet container to spring and finds GreetingServiceImpl. The SL
transforms POJOs at runtime into RPC services, thus you don't need to
(and actually shouldn't) extend RemoteServiceServlet. As a matter of
fact you don't have to extend any class. If you need access to the
servlet API have a look at the ServletUtils class. I hope that helps,
G.
quinton
Feb 25, 2012, 3:45:34 PM2/25/12
to gwt-sl
You are a scholar and a gentleman. I removed the base class
RemoteServiceServlet from the example and it worked perfectly. Thanks
for the fast guidance.
On Feb 25, 2:31 pm, George Georgovassilis <g.georgovassi...@gmail.com>
wrote:
> > at...
>
> read more »
RemoteServiceServlet from the example and it worked perfectly. Thanks
for the fast guidance.
On Feb 25, 2:31 pm, George Georgovassilis <g.georgovassi...@gmail.com>
wrote:
> Hi Matt!
>
> The good news is that you are almost there: the request passes through
> the servlet container to spring and finds GreetingServiceImpl. The SL
> transforms POJOs at runtime into RPC services, thus you don't need to
> (and actually shouldn't) extend RemoteServiceServlet. As a matter of
> fact you don't have to extend any class. If you need access to the
> servlet API have a look at the ServletUtils class. I hope that helps,
> G.
>
>
> The good news is that you are almost there: the request passes through
> the servlet container to spring and finds GreetingServiceImpl. The SL
> transforms POJOs at runtime into RPC services, thus you don't need to
> (and actually shouldn't) extend RemoteServiceServlet. As a matter of
> fact you don't have to extend any class. If you need access to the
> servlet API have a look at the ServletUtils class. I hope that helps,
> G.
>
>
> read more »
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