topic Re: Integrity error handling in web scripts in Alfresco Archive

Integrity error handling in web scripts

schambon — Fri, 14 Aug 2009 14:01:49 GMT

Hi all,Suppose that you have a custom model that defines an integrity constraint (eg you're testing that a file name fits the file name regexp). Suppose that you write a data web script (which takes json as input and outputs json as well) that lets you create nodes of your custom type. Now suppose t

Re: Integrity error handling in web scripts

rogier_oudshoor — Tue, 15 Sep 2009 06:40:01 GMT

Integrity checks are performed when a transaction commits. To trigger these checks from within a webscript, you have to:
1. Ensure that the webscript itself is not a transaction (you can configure this in your desc.xml)
2. Create a Java-backed webscript
3. In your webscript, create a new transaction and attempt to commit it
4. Now, you can catch the error and process accordingly, possibly using your own custom 5xx error codes & ftl's

Gluck,

Rogier

Re: Integrity error handling in web scripts

hyperation — Thu, 29 Apr 2010 21:43:39 GMT

Integrity checks are performed when a transaction commits. To trigger these checks from within a webscript, you have to:
1. Ensure that the webscript itself is not a transaction (you can configure this in your desc.xml)
2. Create a Java-backed webscript
3. In your webscript, create a new transaction and attempt to commit it
4. Now, you can catch the error and process accordingly, possibly using your own custom 5xx error codes & ftl's

Gluck,

Rogier

Can you please provide some example for the transaction and attempt to commit step?

Thanks

Re: Integrity error handling in web scripts

schambon — Fri, 30 Apr 2010 07:26:30 GMT

Can you please provide some example for the transaction and attempt to commit step?

Quoting from memory, it should be something like:

UserTransaction tx = transactionService.getUserTransaction(false);
tx.begin();

// do something

try {
   tx.commit();
} catch (RollbackException re) {
   // something bad has happened and the transaction has been rolled back
   // notify the client
}‍‍‍‍‍‍‍‍‍‍‍

Hope that helps,
Sylvain.

Re: Integrity error handling in web scripts

hyperation — Mon, 03 May 2010 20:53:03 GMT

Thanks schambon, it works!