Are instances of core components thread-safe?

[destan]

They seem to be thread-safe. But it says nothing about thread safety in the Javadocs. Some clarification would be good.

[dan3721]

Can we get a confirmation on the thread safety? Thanks!

[serac]

While we tend to design for thread safety in general, we will have to do code review in order to provide a precise answer. We will likely take the approach of adding @ThreadSafe to classes that are known to be thread safe in a forthcoming commit.