@Override public boolean subscribe(MessageHandler handler) { return this.dispatcher.addHandler(handler); }
@Override public boolean subscribe(MessageHandler handler) { Assert.state(this.dispatcher != null, "'MessageDispatcher' must not be null. This channel might not have been initialized"); return this.dispatcher.addHandler(handler); }
@Override public boolean subscribe(MessageHandler handler) { return this.dispatcher.addHandler(handler); }
@Override public boolean subscribe(MessageHandler handler) { Assert.state(this.dispatcher != null, "'MessageDispatcher' must not be null. This channel might not have been initialized"); return this.dispatcher.addHandler(handler); }