/*
* Copyright 2015 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.cloud.stream.test.binder;
import java.util.concurrent.BlockingQueue;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageChannel;
/**
* Maintains a map between (output) channels and messages received (in FIFO order). To be injected in tests that
* can then run assertions on the enqueued messages.
*
* @author Eric Bottard
*/
public interface MessageCollector {
/**
* Obtain a queue that will receive messages sent to the given channel.
*/
BlockingQueue<Message<?>> forChannel(MessageChannel channel);
}