Do you know how costly is to create a webservice client service instance ?
JavaWebService service = new JavaWebService();
SomePort port = service.getJavaWebServicePort();
Creating the service once and after that reusing same port in a multi threaded environment (webapp) is not dangerous ?
Read that the port getPort and port itself is not thread safe but also creating each time a service it might be problematic if it is a costly operation.
Any idea ?
THanks
In the JAX-WS reference implementation (Metro), the creation of the JavaWebService
is inexpensive (in our generated clients, we tend to find this takes around 20ms).
The first creation of SomePort
is quite expensive (circa 200ms for us); subsequent calls to getSomePort()
on the same JavaWebService
instance are substantially quicker (circa 3ms for us).
So, an implementation that creates a JavaWebService
every time it needs to get a SomePort
will carry a degree of expense. In short, the answer to the question is "Quite costly".
However, even though the methods on SomePort
are not thread safe, the methods on JavaWebService
are. So, the sensible usage pattern (at least with Metro - thread-safety is implementation specific due to a somewhat lacking specification) is to reuse JavaWebService
as you will only incur the expensive getSomePort()
call once.
Update
This agrees with two posts by Andreas Leow, an employee from Oracle Germany, one of the posters in the thread referenced by @PapaLazarou in the comment below, who wrote regarding the Service
object,
You can create just one single static
Service
instance per WSDL: any singleService
object is fully thread-safe and can be shared by as many concurrent threads as you like.
and about the usage of ports,
While I am almost 100% certain that CXF JAX-WS Ports are thread-safe, Metro's
Port
objects definitely are not thread-safe.