What is different among ways to execute as system ?

Question

Hi all

During the time i've worked with ivy, i see there is some ways to execute code with system permission:

 - ServerFactory.getServer().getSecurityManager().executeAsSystem(callable) 
 - ServerFactory.getServer().getSecurityManager().executeAsSystem2(callable) 
 - Ivy.wf().getSecurityContext().executeAsSystemUser(callable)
 - SecurityManagerFactory.getSecurityManager().executeAsSystem(callable)

It make me confused, so can anyone explain the differences?

Accepted Answer

These are all calls to the same method: ISecurityManager.executeAsSystem(callable). Just the navigation to that implementation is different:

ServerFactory.getServer().getSecurityManager().executeAsSystem(callable) 
Ivy.wf().getSecurityContext().executeAsSystemUser(callable)
SecurityManagerFactory.getSecurityManager().executeAsSystem(callable)
DiCore.getGlobalInjector.getInstance(ISecurityManager.class).executeAsSystem(callable)

alt text

The executeAsSystem2(Callable) is slightly different. It wraps the may thrown exception as PersistencyException. Since PersistencyException is also a RuntimeException, this method does not require a catch block to handle exceptional cases. alt text

What is different among ways to execute as system ?

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