spring - jax-rs: how to initialize an attribute in servlet context? -

i using servlet context in service:

@context private servletcontext servletcontext;  public void amethod(){       servletcontext.getattribute(.. //this works } 

i'd initialize attribute, according documentation servlet context can accessed in web methods. tried with:

@postconstruct public void init(){     servletcontext.setattribute(... //this not work } 

but gives me null pointer exception. how solve this? avoid if null then.. schemas...

are sure when @postconstruct methods invoked servletcontext available? if need use in service, try inject directly method parameter. otherwise try servletcontextlistener