/*
* Copyright 2016 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.integration.endpoint;
/**
* A message source that can limit the number of remote objects it fetches.
*
* @author Gary Russell
* @since 5.0
*
*/
public abstract class AbstractFetchLimitingMessageSource<T> extends AbstractMessageSource<T>
implements MessageSourceManagement {
private volatile int maxFetchSize = Integer.MIN_VALUE;
@Override
public void setMaxFetchSize(int maxFetchSize) {
this.maxFetchSize = maxFetchSize;
}
@Override
public int getMaxFetchSize() {
return this.maxFetchSize;
}
@Override
protected Object doReceive() {
return doReceive(this.maxFetchSize);
}
/**
* Subclasses must implement this method. Typically the returned value will be the
* payload of type T, but the returned value may also be a Message instance whose
* payload is of type T.
* @param maxFetchSize the maximum number of messages to fetch if a fetch is
* necessary.
* @return The value returned.
*/
protected abstract Object doReceive(int maxFetchSize);
}