[SalesForce] How to over write salesforce standard exception message in catch block

I am using

 catch (Exception e){ 
   ApexPages.Message myMsg = new ApexPages.Message(ApexPages.Severity.FATAL,'my error msg'); 
   ApexPages.addMessage(myMsg); 
}

And have <apex:pageMessages/> in my VF page.

still i get my custom message + the salesforce standard exception displayed at my page. I want only my message to be shown.

For comment

catch(Exception e){
     if(validateVariable.contains('STRING_TOO_LONG') &&
          validateVariable.contains('data value too large') ) { 
        ApexPages.Message myMsg = new ApexPages.Message(ApexPages.Severity.FATAL,'Character limit exceeded. Please limit your essay in the prescribed character limit'); 
        ApexPages.addMessage(myMsg); 
       }

Best Answer

The appropriate way to handle this is by creating a custom exception that gets thrown as an inner exception using a utility class. You first catch the exception, then rethrow it, catching it with your custom "inner exception" that produces the error message you'd like to send. Here's an example from the documentation:

public class MerchandiseException extends Exception {}

public class MerchandiseUtility {
    public static void mainProcessing() {
        try {
            insertMerchandise();
        } catch(MerchandiseException me) {
            System.debug('Message: ' + me.getMessage());    
            System.debug('Cause: ' + me.getCause());    
            System.debug('Line number: ' + me.getLineNumber());    
            System.debug('Stack trace: ' + me.getStackTraceString());    
        }
    }

    public static void insertMerchandise() {
        try {
            // Insert merchandise without required fields
            Merchandise__c m = new Merchandise__c();
            insert m;
        } catch(DmlException e) {
            // Something happened that prevents the insertion
            // of Employee custom objects, so throw a more
            // specific exception.
            throw new MerchandiseException(
                'Merchandise item could not be inserted.', e);
        }
    }
}

Related Solutions

[SalesForce] Preview Email template within Visualforce page, some throw an error

I would refer you to the following docs/posts related to view state to help you troubleshoot the problems you're having with your templates. In some case, its a matter of needing to define your variables as transient to reduce the view state. It can also be one of needing to reduce the number of forms on the page, accessing too many objects at once, or simply needing to optimize your queries so you return only the info that's needed. Here's a list of docs and posts I think you'll find the most helpful to you:

[SalesForce] test custom exception in catch block

You are looking to test this catch block, right?

catch(InnovationService.InnovationServiceException ex) {
    ApexPages.addmessage(new ApexPages.message(ApexPages.severity.ERROR, ex.getMessage()));
}

And you are expecting that that exception to be thrown by this block, right?

try {
    insert recordsToInsert.values();
} catch(InnovationServiceException ex) {
    throw new InnovationServiceException(ex);           
}

If my assumption is right, then I don't think you will ever be generating that error. insert <sobjects> will not throw your custom exception but System.DmlExeption (and other standard exceptions).

One way you can generate that error is to try to insert a Vote object without some required values not specified, catch System.DmlException and convert to InnovationServiceException, may be like this.

try {
    insert recordsToInsert.values();
} catch(System.DmlException ex) {
    throw new InnovationServiceException(ex);           
}

Best Answer

Related Solutions

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