Is the dk.brics.automaton package thread safe?

Question

Apache Lucene uses a modified form of the Brics automaton package. But is Brics thread safe?

More specifically, can it safely handle multiple, concurrent automaton instances from different threads - without blocking?

score 3 · Accepted Answer · answered Dec 08 '11 at 08:08

3

Yes, constructing an Automaton or a RunAutomaton from a RegExp is thread safe - unless you use setAllowMutate.

answered Dec 08 '11 at 08:08

Anders Møller

score 1 · Answer 2 · answered Dec 08 '11 at 01:46

1

thread safety depends upon how you use it, but the way in which we use it doesn't need to be thread safe.

thats because automatonquery's constructor compiles everything to a totally immutable form internally.

answered Dec 08 '11 at 01:46

Robert Muir

1

I meant if the same compiled Automaton and then create multiple RunAutomaton instances - one in each thread and then run them concurrently? – Ashwin Jayaprakash Dec 08 '11 at 04:06

2 Answers2