[jboss-user] [JBoss Seam] - Re: When can @Logger be used?
appendix
do-not-reply at jboss.com
Fri Aug 11 10:16:54 EDT 2006
Ok, I managed to get the @Logger working in the simple bean:
| @Name("user1A6")
| public class User1A6 {
|
| private String username;
| private String password;
|
| @Logger private org.jboss.seam.log.Log log_seam;
|
| public User1A6() {
| System.out.println("===== User1A6 constructor");
| }
|
| public String getPassword() {
| System.out.println("===== User1A6.getPassword called");
| log_seam.info("===== User1A6.getPassword called");
| return password;
| }
|
| public void setPassword(String password) {
| System.out.println("===== User1A6.setPassword called: "+password);
| log_seam.info("===== User1A6.setPassword called: "+password);
| this.password = password;
| }
|
| public String getUsername() {
| System.out.println("===== User1A6.getUsername called");
| log_seam.info("===== User1A6.getUsername called");
| return username;
| }
|
| public void setUsername(String username) {
| System.out.println("===== User1A6.setUsername2 called: "+username);
| log_seam.info("===== User1A6.setUsername called: "+username);
| this.username = username;
| }
|
| public void frontendLog()
| {
| log_seam.debug( "User1A6 has been called from the frontend - @Logger" );
| }
|
The logger is accessible except in the constructor, which makes sense after all ;)
BUT if the bean is a entity-bean, I'm getting exceptions when I'm using the logger again!
Here's the code from a seam-example:
| @Entity
| @Name("user")
| @Scope(SESSION)
| @Table(name = "users")
| public class User implements Serializable {
|
| @Logger private org.jboss.seam.log.Log log;
|
| private String username;
| private String password;
| private String name;
|
| public User(String name, String password, String username) {
| this.name = name;
| this.password = password;
| this.username = username;
| }
|
| public User() {
| }
|
| @Id
| @NotNull
| @Length(min = 5, max = 15)
| public String getUsername() {
| log.info("===== User.getUsername: ");
| return username;
| }
|
| public void setUsername(String username) {
| log.debug("==== User.setUsername: ");
| this.username = username;
| }
|
| @NotNull
| @Length(min=5, max=15)
| public String getPassword() {
| log.info("===== User.getPassword: " );
| return password;
| }
|
| public void setPassword(String password) {
| log.debug("==== User.setPassword: ");
| this.password = password;
| }
|
| // ... some more getter/setter and methods
|
|
When the page refering to the user is called, I'll get a NullPointer Exception:
| javax.faces.el.EvaluationException: /home.xhtml @19,113 value="#{user.username}": org.jboss.seam.example.registration.User
| at com.sun.facelets.el.LegacyValueBinding.getValue(LegacyValueBinding.java:60)
| at javax.faces.component.UIOutput.getValue(UIOutput.java:75)
| at org.apache.myfaces.renderkit.RendererUtils.getStringValue(RendererUtils.java:225)
| at org.apache.myfaces.renderkit.html.HtmlTextRendererBase.renderInput(HtmlTextRendererBase.java:131)
| at org.apache.myfaces.renderkit.html.HtmlTextRendererBase.encodeEnd(HtmlTextRendererBase.java:49)
| at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:331)
| at com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:242)
| at com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:239)
| at com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:239)
| at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:554)
| at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:352)
| at javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:30)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at org.jboss.seam.servlet.SeamExceptionFilter.doFilter(SeamExceptionFilter.java:45)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
| at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
| at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
| at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
| at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
| at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
| at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
| at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
| at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
| at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
| at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
| at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
| at java.lang.Thread.run(Thread.java:595)
| Caused by: javax.faces.el.EvaluationException: Bean: org.jboss.seam.example.registration.User, property: username
| at org.apache.myfaces.el.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:404)
| at org.apache.myfaces.el.PropertyResolverImpl.getValue(PropertyResolverImpl.java:71)
| at com.sun.facelets.el.LegacyELContext$LegacyELResolver.getValue(LegacyELContext.java:141)
| at com.sun.el.parser.AstValue.getValue(AstValue.java:117)
| at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:192)
| at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71)
| at com.sun.facelets.el.LegacyValueBinding.getValue(LegacyValueBinding.java:56)
| ... 35 more
| Caused by: java.lang.reflect.InvocationTargetException
| at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
| at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
| at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
| at java.lang.reflect.Method.invoke(Method.java:585)
| at org.apache.myfaces.el.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:400)
| ... 41 more
| Caused by: java.lang.NullPointerException
| at org.jboss.seam.example.registration.User.getUsername(Unknown Source)
| ... 46 more
|
The logger should work in this case as well, right?
If I replace the seam logger with the one from apache.commons.logging everything's great!
Sorry for the long post and I'll appreciate your help!
Thanks, Kurt
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