https://bz.apache.org/bugzilla/show_bug.cgi?id=58232
Bug ID: 58232
Summary: PojoMethodMapping needed - Programatically adding
ServerEndpointConfig not possible
Product: Tomcat 8
Version: 8.0.23
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: WebSocket
Assignee: [email protected]
Reporter: [email protected]
Hello,
I'm currently trying to register my own WebsocketEndpoint programatically, i.e.
not using the annotations. JSR-356 says this is possible by using the
ServerContainer which can be obtained from the ServletContext (see section
6.4).
The ServerContainer provides two methods that can be used to add a new
endpoint. I do not want to use the one that takes a Class<?>, but I need to use
the one that takes a ServerEndpointConfig. This is because I want to add some
UserProperties to the ServerEndpointConfig before it is added - and I cannot do
that when using the method that takes the Class<?>.
When I'm doing this and try it, I get the following exception:
Aug 11, 2015 2:23:52 PM
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler process
SEVERE: Error reading request, ignored
java.lang.NullPointerException
at
org.apache.tomcat.websocket.pojo.PojoEndpointBase.doOnOpen(PojoEndpointBase.java:59)
at
org.apache.tomcat.websocket.pojo.PojoEndpointServer.onOpen(PojoEndpointServer.java:70)
at
org.apache.tomcat.websocket.server.WsHttpUpgradeHandler.init(WsHttpUpgradeHandler.java:138)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:696)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1521)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1478)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
When looking at the source of Tomcat, it seems that the method taking the
Class<?> adds a userProperty to the ServerEndpointConfig, which contains an
instance of PojoMethodMapping. This is not done when directly calling the
method that takes the ServerEndpointConfig - and exactly that PojoMethodMapping
seems to be missing in my case.
As PojoMethodMapping is not defined by the JSR, but is a Tomcat class, I would
like to not instantiate it myself, but I think the instantiation of
PojoMethodMapping should be done in Tomcat in the method taking the
ServerEndpointConfig, as the one with the Class<?> parameter calls that one
anyway.
I patched tomcat locally and it seems to work for me after that adjustment. I
therefore propose that this adjustment be integrated into trunk.
I will upload my changes to GitHub right away and add a comment with the link
here.
Thanks,
Basti
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