Examples of org.apache.click.util.ErrorPage

org.apache.click.util.ErrorPage
Provides the base error handling Page. The ErrorPage handles any unexpected Exceptions. When the application is not in "production" mode the ErrorPage will provide diagnostic information.
The ErrorPage template "click/error.htm" can be customized to your needs.
Applications which require additional error handling logic must subclass the ErrorPage. For example to rollback a Connection if an SQLException occured:
```
 package com.mycorp.util; import java.sql.Connection; import java.sql.SQLException; import org.apache.click.util.ErrorPage; public class MyCorpErrorPage extends ErrorPage { / * @see Page#onDestroy() * / public void onDestroy() { Exception errror = getError(); if (error instanceof SQLException || error.getCause() instanceof SQLException) { Connection connection = ConnectionProviderThreadLocal.getConnection(); if (connection != null) { try { connection.rollback(); } catch (SQLException sqle) { } finally { try { connection.close(); } catch (SQLException sqle) { } } } } } } 
```
The ClickServlet sets the following ErrorPage properties in addition to the normal Page properties:
- {@link #error} - the error causing exception
- {@link #mode} - the Click application mode
- {@link #pageClass} - the Page class which cause the error


        } else {
            logger.error("handleException: ", exception);
        }


        ErrorPage finalizeRef = null;
        try {
            final ErrorPage errorPage = createErrorPage(pageClass, exception);


            finalizeRef = errorPage;


            errorPage.setError(exception);
            if (errorPage.getFormat() == null) {
                errorPage.setFormat(configService.createFormat());
            }
            errorPage.setHeaders(configService.getPageHeaders(ConfigService.ERROR_PATH));
            errorPage.setMode(configService.getApplicationMode());
            errorPage.setPageClass(pageClass);
            errorPage.setPath(ConfigService.ERROR_PATH);


            processPageFields(errorPage, new FieldCallback() {
                public void processField(String fieldName, Object fieldValue) {
                    if (fieldValue instanceof Control) {
                        Control control = (Control) fieldValue;
                        if (control.getName() == null) {
                            control.setName(fieldName);
                        }


                        if (!errorPage.getModel().containsKey(control.getName())) {
                            errorPage.addControl(control);
                        }
                    }
                }
            });


            if (errorPage.isStateful()) {
                synchronized (errorPage) {
                    processPage(errorPage);
                    processPageOnDestroy(errorPage, 0);
                    // Mark page as already destroyed for finally block
                    finalizeRef = null;

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        ControlRegistry controlRegistry = ControlRegistry.getThreadLocalRegistry();


        boolean errorOccurred = page instanceof ErrorPage;
        // Support direct access of click-error.htm
        if (errorOccurred) {
            ErrorPage errorPage = (ErrorPage) page;
            errorPage.setMode(configService.getApplicationMode());


            // Notify the eventDispatcher and controlRegistry of the error
            eventDispatcher.errorOccurred(errorPage.getError());
            controlRegistry.errorOccurred(errorPage.getError());
        }


        boolean continueProcessing = performOnSecurityCheck(page, context);


        ActionResult actionResult = null;

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        ControlRegistry controlRegistry = ControlRegistry.getThreadLocalRegistry();


        // TODO Ajax requests shouldn't reach this code path since errors
        // are rendered directly
        if (page instanceof ErrorPage) {
            ErrorPage errorPage = (ErrorPage) page;
            errorPage.setMode(configService.getApplicationMode());


            // Notify the dispatcher and registry of the error
            eventDispatcher.errorOccurred(errorPage.getError());
            controlRegistry.errorOccurred(errorPage.getError());
        }


        boolean continueProcessing = performOnSecurityCheck(page, context);


        ActionResult actionResult = null;

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Related Classes of org.apache.click.util.ErrorPage

org.apache.click.ClickServlet

org.apache.click.Context

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