> will automatically be translated by the runtime into non-blocking IO when it occurs on virtual threads, and no OS threads will be blocked
it looks like it is true for several API you implemented support for. What about other API, for example some JDBC driver which wants to use non-blocking DB driver. How to use virtual threads with that?
JDBC drivers are implemented on top of JDK APIs and so will work the same way: their I/O would automatically be non-blocking when run on a virtual thread (module some quality-of-implementation issues around the use of synchronized that we're working on, which are mentioned in the material I linked to).
JDBC drivers that are implemented on top of their own native code are a different matter, but they are not common these days.
it looks like it is true for several API you implemented support for. What about other API, for example some JDBC driver which wants to use non-blocking DB driver. How to use virtual threads with that?