001/* 002 * Copyright 2002-2015 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.messaging.simp.stomp; 018 019import java.lang.reflect.Type; 020 021/** 022 * Contract to handle a STOMP frame. 023 * 024 * @author Rossen Stoyanchev 025 * @since 4.2 026 */ 027public interface StompFrameHandler { 028 029 /** 030 * Invoked before {@link #handleFrame(StompHeaders, Object)} to determine the 031 * type of Object the payload should be converted to. 032 * @param headers the headers of a message 033 */ 034 Type getPayloadType(StompHeaders headers); 035 036 /** 037 * Handle a STOMP frame with the payload converted to the target type returned 038 * from {@link #getPayloadType(StompHeaders)}. 039 * @param headers the headers of the frame 040 * @param payload the payload or {@code null} if there was no payload 041 */ 042 void handleFrame(StompHeaders headers, Object payload); 043 044}