@ GuardedBy ( "monitor" ) private void checkCurrentState ( State expected ) { State actual = state ( ) ; if ( actual != expected ) { if ( actual == FAILED ) { // Handle this specially so that we can include the failureCause, if there is one. throw new IllegalStateException ( "Expected the service " + this + " to be " + expected + ", but the service has FAILED" , failureCause ( ) ) ; } throw new IllegalStateException ( "Expected the service " + this + " to be " + expected + ", but was " + actual ) ; } }
Checks that the current state is equal to the expected state .