Are JAX-WS client proxies thread safe?
Official JAX-WS answer: No. According to the JAX-WS spec, the client proxies are NOT thread safe. To write portable code, you should treat them as non-thread safe and synchronize access or use a pool of instances or similar. CXF answer: CXF proxies are thread safe for MANY use cases. The exceptions are: • Use of ((BindingProvider)proxy).getRequestContext() – per JAX-WS spec, the request context is PER INSTANCE. Thus, anything set there will affect requests on other threads. With CXF, you can do: ((BindingProvider)proxy).getRequestContext().put(“thread.local.request.context”, “true”); and future calls to getRequestContext() will use a thread local request context. That allows the request context to be threadsafe. (Note: the response context is always thread local in CXF) • Settings on the conduit – if you use code or configuration to directly manipulate the conduit (like to set TLS settings or similar), those are not thread safe. The conduit is per-instance and thus those settings would
