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From "Chen, Gin" <Gin.C...@NielsenMedia.com>
Subject RE: isEmpty() Method Not Working?
Date Mon, 03 Mar 2003 22:03:06 GMT
Dont worry about the Z.
Apparently you have the latest version of Struts for development but not
when you deploy.
You might want to check the version that you have deployed with to make
sure.
-Tim

-----Original Message-----
From: Mervin Williams [mailto:mwilliams@innovasolutions.net]
Sent: Monday, March 03, 2003 4:58 PM
To: 'Struts Users Mailing List'
Subject: RE: isEmpty() Method Not Working?


I put a try/catch block around the "if(!errors.isEmpty())" call, but the
catch block was never entered, and the exception occurred.  Below is the
stack trace for the error.  

I do notice something strange in the stack tracke: in the "Root Cause"
portion of the stack trace, the NoSuchMethodError refers to a method
named "ActionMessages.isEmpty()Z".  Where is the "Z" coming from - I do
not have a "Z" at the end of my method call.

--------------------------------------
2003-03-03 15:48:18,909 ERROR [org.jboss.web.localhost.Engine]
StandardWrapperValve[action]: Servlet.service() for servlet action threw
exception
javax.servlet.ServletException: Servlet execution threw an exception
	at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
tionFilterChain.java:269)
	at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
erChain.java:193)
	at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv
e.java:260)
	at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:643)
	at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
80)
	at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
	at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv
e.java:191)
	at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:643)
	at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authenticator
Base.java:550)
	at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641)
	at
org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.ja
va:246)
	at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641)
	at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
80)
	at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
	at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:241
5)
	at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
:180)
	at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:643)
	at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherVa
lve.java:170)
	at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641)
	at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java
:172)
	at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641)
	at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:509
)
	at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641)
	at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
80)
	at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
	at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
java:174)
	at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:643)
	at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
80)
	at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
	at
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
	at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:43
2)
	at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processC
onnection(Http11Protocol.java:386)
	at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:53
4)
	at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool
.java:530)
	at java.lang.Thread.run(Thread.java:536)
2003-03-03 15:48:19,620 ERROR [org.jboss.web.localhost.Engine] -----
Root Cause -----
java.lang.NoSuchMethodError:
org.apache.struts.action.ActionMessages.isEmpty()Z
	at prototype_1.SearchAction.execute(SearchAction.java:272)
	at
org.apache.struts.action.RequestProcessor.processActionPerform(RequestPr
ocessor.java:446)
	at
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:
266)
	at
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1292)
	at
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:510)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
tionFilterChain.java:247)
	at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
erChain.java:193)
	at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv
e.java:260)
	at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:643)
	at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
80)
	at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
	at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv
e.java:191)
	at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:643)
	at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authenticator
Base.java:550)
	at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641)
	at
org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.ja
va:246)
	at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641)
	at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
80)
	at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
	at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:241
5)
	at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
:180)
	at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:643)
	at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherVa
lve.java:170)
	at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641)
	at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java
:172)
	at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641)
	at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:509
)
	at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641)
	at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
80)
	at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
	at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
java:174)
	at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:643)
	at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
80)
	at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
	at
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
	at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:43
2)
	at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processC
onnection(Http11Protocol.java:386)
	at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:53
4)
	at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool
.java:530)
	at java.lang.Thread.run(Thread.java:536)

-----Original Message-----
From: p2 - apache [mailto:apachep2@hotmail.com] 
Sent: Monday, March 03, 2003 3:01 PM
To: 'Struts Users Mailing List'
Subject: RE: isEmpty() Method Not Working?


Can you put a try/catch block around your if (!errors... Let's see if
this is where the exception is thrown.

-----Original Message-----
From: Mervin Williams [mailto:mwilliams@innovasolutions.net] 
Sent: March 3, 2003 3:45 PM
To: struts-user@jakarta.apache.org
Subject: FW: isEmpty() Method Not Working?

Every time my application encounters the ActionErrors isEmpty() message,
a Servlet Exception occurs.  I simply replaced the old call from
"errors.empty()" to "errors.isEmpty()".  If anyone has ideas as to
what's going on, please help!

Here is my code:
--------------------------------------
           try
           {
                if (stmt != null)
                {
                  stmt.close();
                }
                if (conn != null)
                {
                  conn.close();
                }
           }
           catch(Exception e)
           {
             target = "error";
             ActionErrors errors = new ActionErrors();
             errors.add(ActionErrors.GLOBAL_ERROR, new
ActionError("errors.database.error", e.getMessage()));

             // Report any errors
              if(!errors.isEmpty())
              {
               saveErrors(req, errors);
              }
           }


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