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 021import org.springframework.lang.Nullable; 022 023/** 024 * Abstract adapter class for {@link StompSessionHandler} with mostly empty 025 * implementation methods except for {@link #getPayloadType} which returns String 026 * as the default Object type expected for STOMP ERROR frame payloads. 027 * 028 * @author Rossen Stoyanchev 029 * @since 4.2 030 */ 031public abstract class StompSessionHandlerAdapter implements StompSessionHandler { 032 033 /** 034 * This implementation returns String as the expected payload type 035 * for STOMP ERROR frames. 036 */ 037 @Override 038 public Type getPayloadType(StompHeaders headers) { 039 return String.class; 040 } 041 042 /** 043 * This implementation is empty. 044 */ 045 @Override 046 public void handleFrame(StompHeaders headers, @Nullable Object payload) { 047 } 048 049 /** 050 * This implementation is empty. 051 */ 052 @Override 053 public void afterConnected(StompSession session, StompHeaders connectedHeaders) { 054 } 055 056 /** 057 * This implementation is empty. 058 */ 059 @Override 060 public void handleException(StompSession session, @Nullable StompCommand command, 061 StompHeaders headers, byte[] payload, Throwable exception) { 062 } 063 064 /** 065 * This implementation is empty. 066 */ 067 @Override 068 public void handleTransportError(StompSession session, Throwable exception) { 069 } 070 071}