001/* 002 * Copyright 2002-2017 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.config; 018 019import java.util.Arrays; 020import java.util.Collection; 021import java.util.Collections; 022import java.util.List; 023 024import org.springframework.lang.Nullable; 025import org.springframework.messaging.MessageChannel; 026import org.springframework.messaging.SubscribableChannel; 027import org.springframework.messaging.simp.broker.AbstractBrokerMessageHandler; 028import org.springframework.util.Assert; 029 030/** 031 * Base class for message broker registration classes. 032 * 033 * @author Rossen Stoyanchev 034 * @since 4.0 035 */ 036public abstract class AbstractBrokerRegistration { 037 038 private final SubscribableChannel clientInboundChannel; 039 040 private final MessageChannel clientOutboundChannel; 041 042 private final List<String> destinationPrefixes; 043 044 045 public AbstractBrokerRegistration(SubscribableChannel clientInboundChannel, 046 MessageChannel clientOutboundChannel, @Nullable String[] destinationPrefixes) { 047 048 Assert.notNull(clientOutboundChannel, "'clientInboundChannel' must not be null"); 049 Assert.notNull(clientOutboundChannel, "'clientOutboundChannel' must not be null"); 050 051 this.clientInboundChannel = clientInboundChannel; 052 this.clientOutboundChannel = clientOutboundChannel; 053 054 this.destinationPrefixes = (destinationPrefixes != null ? 055 Arrays.asList(destinationPrefixes) : Collections.emptyList()); 056 } 057 058 059 protected SubscribableChannel getClientInboundChannel() { 060 return this.clientInboundChannel; 061 } 062 063 protected MessageChannel getClientOutboundChannel() { 064 return this.clientOutboundChannel; 065 } 066 067 protected Collection<String> getDestinationPrefixes() { 068 return this.destinationPrefixes; 069 } 070 071 072 protected abstract AbstractBrokerMessageHandler getMessageHandler(SubscribableChannel brokerChannel); 073 074}