Error Exception Handling
I am trying to have the Exception page shown in Tapestry when my GridDataSource
throws an exception. How do i catch a ComponentEventException and have Tapestry
redirect to the Exception page.
Your help is much appreciated!
Here is the logs..
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
Caused by: org.apache.tapestry5.runtime.ComponentEventException [at
classpath:com/navicure/ui/admin/pages/incoming/IncomingFilesPage.tml, line 67]
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl.processEventTriggering(ComponentPageElementImpl.java:1141)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl.access$3100(ComponentPageElementImpl.java:61)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl$5.invoke(ComponentPageElementImpl.java:1062)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl$5.invoke(ComponentPageElementImpl.java:1059)
at
org.apache.tapestry5.ioc.internal.OperationTrackerImpl.invoke(OperationTrackerImpl.java:74)
... 100 more Caused by: java.lang.NullPointerException at
com.navicure.ui.admin.tables.FragmentDataSource.getAvailableRows(FragmentDataSource.java:91)
at
org.got5.tapestry5.jquery.internal.DefaultDataTableModel.getResponse(DefaultDataTableModel.java:243)
at
org.got5.tapestry5.jquery.internal.DefaultDataTableModel.sendResponse(DefaultDataTableModel.java:375)
at org.got5.tapestry5.jquery.components.DataTable.onData(DataTable.java:128)
at
org.got5.tapestry5.jquery.components.DataTable.dispatchComponentEvent(DataTable.java)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl.dispatchEvent(ComponentPageElementImpl.java:940)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl.processEventTriggering(ComponentPageElementImpl.java:1117)
... 104 more
Here is my object that implements ExceptionReporter
package com.navicure.ui.admin.pages;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Date;
import org.apache.log4j.Logger;
import org.apache.tapestry5.annotations.Log;
import org.apache.tapestry5.annotations.Property;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.apache.tapestry5.services.ExceptionReporter;
import org.apache.tapestry5.services.ajax.AjaxResponseRenderer;
import org.apache.tapestry5.services.ajax.JavaScriptCallback;
import org.apache.tapestry5.services.javascript.JavaScriptSupport;
public class ExceptionReport implements ExceptionReporter {
private static Logger log = Logger.getLogger(ExceptionReport.class);
@Property
private Date filterToDate;
@Property
private Throwable exception;
@Inject
private AjaxResponseRenderer ajaxResponseRenderer;
@Property
private String messageStackTrace;
@Override
public void reportException(Throwable exception) {
this.exception = exception;
log.error(exception);
this.messageStackTrace = this.getStackMessageTrace();
}
private String getStackMessageTrace()
{
StringWriter errors = new StringWriter();
exception.printStackTrace(new PrintWriter(errors));
return errors.toString();
}
}
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Exception Handling
I am trying to have the Exception page shown in Tapestry when my GridDataSource
throws an exception. How do i catch a ComponentEventException nad have Tapestry
redirect to the Exception page.
Your help is much appreciated!
Here is the logs..
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
Caused by: org.apache.tapestry5.runtime.ComponentEventException [at
classpath:com/navicure/ui/admin/pages/incoming/IncomingFilesPage.tml, line 67]
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl.processEventTriggering(ComponentPageElementImpl.java:1141)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl.access$3100(ComponentPageElementImpl.java:61)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl$5.invoke(ComponentPageElementImpl.java:1062)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl$5.invoke(ComponentPageElementImpl.java:1059)
at
org.apache.tapestry5.ioc.internal.OperationTrackerImpl.invoke(OperationTrackerImpl.java:74)
... 100 more Caused by: java.lang.NullPointerException at
com.navicure.ui.admin.tables.FragmentDataSource.getAvailableRows(FragmentDataSource.java:91)
at
org.got5.tapestry5.jquery.internal.DefaultDataTableModel.getResponse(DefaultDataTableModel.java:243)
at
org.got5.tapestry5.jquery.internal.DefaultDataTableModel.sendResponse(DefaultDataTableModel.java:375)
at org.got5.tapestry5.jquery.components.DataTable.onData(DataTable.java:128)
at
org.got5.tapestry5.jquery.components.DataTable.dispatchComponentEvent(DataTable.java)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl.dispatchEvent(ComponentPageElementImpl.java:940)
at
org.apache.tapestry5.internal.structure.ComponentPageElementImpl.processEventTriggering(ComponentPageElementImpl.java:1117)
... 104 more
Here is my object that implements ExceptionReporter
package com.navicure.ui.admin.pages;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Date;
import org.apache.log4j.Logger;
import org.apache.tapestry5.annotations.Log;
import org.apache.tapestry5.annotations.Property;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.apache.tapestry5.services.ExceptionReporter;
import org.apache.tapestry5.services.ajax.AjaxResponseRenderer;
import org.apache.tapestry5.services.ajax.JavaScriptCallback;
import org.apache.tapestry5.services.javascript.JavaScriptSupport;
public class ExceptionReport implements ExceptionReporter {
private static Logger log = Logger.getLogger(ExceptionReport.class);
@Property
private Date filterToDate;
@Property
private Throwable exception;
@Inject
private AjaxResponseRenderer ajaxResponseRenderer;
@Property
private String messageStackTrace;
@Override
public void reportException(Throwable exception) {
this.exception = exception;
log.error(exception);
this.messageStackTrace = this.getStackMessageTrace();
}
private String getStackMessageTrace()
{
StringWriter errors = new StringWriter();
exception.printStackTrace(new PrintWriter(errors));
return errors.toString();
}
}
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