topic Why AuthenticationUtil.runAs() ? in Alfresco Archive https://connect.hyland.com/t5/alfresco-archive/why-authenticationutil-runas/m-p/259887#M213017 <HTML><HEAD></HEAD><BODY><SPAN>Question for all,</SPAN><BR /><BR /><SPAN>When i'm trying to locking a node for edit its properties, the lock was throw an exception as well as there is no User Context.</SPAN><BR /><BR /><SPAN>To set the user context i write the following snipe of code </SPAN><BR /><BR /><SPAN>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;AuthenticationUtil.runAs(new RunAsWork&lt;String&gt;(){</SPAN><BR /><SPAN>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;public String doWork()throws Exception{</SPAN><BR /><SPAN>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return doProcess();</SPAN><BR /><SPAN>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}</SPAN><BR /><SPAN>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}, AuthenticationUtil.getSystemUserName());</SPAN><BR /><BR /><SPAN>and in the doProcess method i put the </SPAN><BR /><BR /><SPAN>RetryingTransactionCallback&lt;String&gt; callback = new RetryingTransactionCallback&lt;String&gt;() {</SPAN><BR /><SPAN>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;public String execute() throws Throwable {</SPAN><BR /><SPAN>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // My Business Code </SPAN><BR /><SPAN>} </SPAN><BR /><BR /><SPAN>And i need to ask</SPAN><BR /><BR /><SPAN>- Why i need to use AuthenticationUtil.runAs() to put the user context for the locking operation ?</SPAN><BR /><SPAN>&nbsp;&nbsp; - Is to gain user context, or there are another several reasons ?</SPAN><BR /><SPAN>- Why i need to use RetryingTransactionCallback for put my business development lines ?</SPAN><BR /><SPAN>&nbsp; - Is for retrying the action, even if the action failed for locking as example, or there are other reasons ?</SPAN><BR /><SPAN>Your advise is highly appreciated.</SPAN><BR /><BR /><SPAN>Mohammed Amr</SPAN><BR /><SPAN>Senior System Developer</SPAN><BR /><SPAN>Digital Series Co.</SPAN></BODY></HTML> Mon, 25 Jul 2011 14:11:59 GMT mohammed_amr 2011-07-25T14:11:59Z Why AuthenticationUtil.runAs() ? https://connect.hyland.com/t5/alfresco-archive/why-authenticationutil-runas/m-p/259887#M213017 Question for all,When i'm trying to locking a node for edit its properties, the lock was throw an exception as well as there is no User Context.To set the user context i write the following snipe of code &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;AuthenticationUtil.runAs(new RunAsWork&lt;String&gt;(){&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;public String doWork()thro Mon, 25 Jul 2011 14:11:59 GMT https://connect.hyland.com/t5/alfresco-archive/why-authenticationutil-runas/m-p/259887#M213017 mohammed_amr 2011-07-25T14:11:59Z Re: Why AuthenticationUtil.runAs() ? https://connect.hyland.com/t5/alfresco-archive/why-authenticationutil-runas/m-p/259888#M213018 <HTML><HEAD></HEAD><BODY><SPAN>Why indeed!&nbsp; I agree that the lock service is a little tricky to use, in fact I raised a JIRA enhancement request to rework it.&nbsp;&nbsp; You could vote for it if you agree.</SPAN><BR /><BR /><SPAN>As for your second point all code within alfresco needs to be within a retrying transaction handler.&nbsp;&nbsp;&nbsp; For performance reasons Alfresco uses optimistic locking which in general means that everything needs to be retried after a relativly rare concurrency error.&nbsp;&nbsp; The good news is that the RetryingTransactionHandler does this for you and most of the interfaces, in particular web scripts, already automatically retry. </SPAN><A href="http://en.wikipedia.org/wiki/Optimistic_concurrency_control" rel="nofollow noopener noreferrer">http://en.wikipedia.org/wiki/Optimistic_concurrency_control</A></BODY></HTML> Mon, 25 Jul 2011 14:59:12 GMT https://connect.hyland.com/t5/alfresco-archive/why-authenticationutil-runas/m-p/259888#M213018 mrogers 2011-07-25T14:59:12Z