syntaxe of variable

[vallee.romain]

Hello cas users,

just for know :

in this page  https://apereo.github.io/cas/4.1.x/installation/Configuring-LongTerm-Authentication.html

we can see

<bean id="longTermSessionTGTExpirationPolicy"
      class="org.jasig.cas.ticket.support.TimeoutExpirationPolicy"
      c:timeToKillInMilliSeconds="#{ ${rememberMeDuration:1209600} * 1000 }" />

what # does it mean ? in c:timeToKillInMilliSeconds ?

Best regards

[Alex Olson]

It means "evaluate whats inside the #{} as Spring Expression Language:

http://docs.spring.io/spring/docs/current/spring-framework-reference/html/expressions.html#expressions-beandef

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[vallee.romain]

Hello Mister Olson,

it is for the multiplication ?

[Alex Olson]

Yeah it evaluates the multiplication.

We have:

#{ ${rememberMeDuration:1209600} * 1000 }

which tells spring "Hey! Please evaluate this as Spring Expression Language.

Spring dutifully does as asked and begins evaluating.

In this case, we have a multiplication operation between two values. One variable and one constant.

The expression:  ${rememberMeDuration:1209600} says "Use the value of rememberMeDuration  if it exists, otherwise use 1209600".

Assuming there is no value for rememberMeDuration, the expression becomes:

#{ 1209600 * 1000 }"

which kicks out a value of 1209600000.

Which means that the expression you have there without a rememberMeDuration would be equivalent to:

<bean id="longTermSessionTGTExpirationPolicy"
      class="org.jasig.cas.ticket.support.TimeoutExpirationPolicy"

      c:timeToKillInMilliSeconds="1209600000" />

 

If you have a value in rememberMeDuration, it would of course use that instead.

To view this discussion on the web visit https://groups.google.com/a/apereo.org/d/msgid/cas-user/b7cbbd1f-a20f-43f5-a016-8470965b088d%40apereo.org.

For more options, visit https://groups.google.com/a/apereo.org/d/optout.

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-- Alex

[vallee.romain]

thank you very much Mister Olson.

i think i wasn't the only too have this question ...

your explanation is so clear !!