no such pool Failed Tcl_pool_GetFromObj

Hi RG,

 

 

The code within the catch statement is executed. Catch handles the error if one occurs and allows any subsequent code to be executed normally. So the example I posted above should work fine to try to assign the pool and otherwise log an error message if the pool doesn't exist. If you added more code after the catch statement, it would be run after the catch statement runs regardless of whether the code within the catch statement generated an error or not.

 

 

Here are a few examples of using catch:

 

 

iRule test:

 

 

 
     return 0 is false.  Save the result of running the command 'return 0' to the variable named result 
    if {[catch {return 0} result]}{ 
       log local0. "catch was true, because return resulted in return code 0. Result: $result" 
    } else { 
       log local0. "catch was false, because return resulted in non-zero return code. Result: $result" 
    } 
 

 

 

Log output:

 

 

 

Rule : catch was true, because return resulted in return code 0. Result: 0

 

 

 

 

iRule test:

 

 

 
    if {[catch {set test 1} result] }{ 
       log local0. "catch was true, because the set command returned with an error. Result: $result" 
    } else { 
       log local0. "catch was false, because the set command returned without error. Result: $result" 
    } 
     This log statement will run regardless of whether there is an error or not 
    log local0. "\$test: $test (This log statement will run regardless of whether there is an error or not)" 
 

 

 

Log output:

 

 

 

Rule : catch was false, because the set command returned without error. Result: 1

 

Rule : $test: 1 (This log statement will run regardless of whether there is an error or not)

 

 

 

 

iRule test:

 

 

 
    if {[catch {set test $var_that_doesnt_exist} result]}{ 
       log local0. "catch was true, because the set command returned with an error. Result: $result " 
    } else { 
       log local0. "catch was false, because the set command returned without error. Result: $result" 
    } 
 

 

 

Log output:

 

 

 

Rule : catch was true, because the set command returned with an error. Result: can't read "var_that_doesnt_exist": no such variable

 

 

 

 

Aaron