java ee - Websphere: set user for LTPA token -


running under websphere 8 have ejb calls soap web service (using jax-ws-generated client code). authentication web service done via ltpa token. websphere configured (using policy set , binding) automatically create ltpa token. token contains user credentials context ejb running in.

however, need map current user different user use web service call. (i.e. user calls me, need use user x call web service. user b calls me, need use user y etc.)

is there way dynamically set credentials ltpa token? if not, can use policy set bindings set static user ltpa token, independent of current context?


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