/*
* 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.dsl;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
import java.util.function.Function;
import org.aopalliance.aop.Advice;
import org.springframework.expression.Expression;
import org.springframework.integration.expression.FunctionExpression;
import org.springframework.integration.handler.DelayHandler;
import org.springframework.integration.store.MessageGroupStore;
import org.springframework.messaging.Message;
import org.springframework.util.Assert;
/**
* A {@link ConsumerEndpointSpec} for a {@link DelayHandler}.
*
* @author Artem Bilan
*
* @since 5.0
*/
public final class DelayerEndpointSpec extends ConsumerEndpointSpec<DelayerEndpointSpec, DelayHandler> {
private final List<Advice> delayedAdvice = new LinkedList<Advice>();
DelayerEndpointSpec(DelayHandler delayHandler) {
super(delayHandler);
Assert.notNull(delayHandler, "'delayHandler' must not be null.");
this.handler.setDelayedAdviceChain(this.delayedAdvice);
}
/**
* @param defaultDelay the defaultDelay.
* @return the endpoint spec.
* @see DelayHandler#setDefaultDelay(long)
*/
public DelayerEndpointSpec defaultDelay(long defaultDelay) {
this.handler.setDefaultDelay(defaultDelay);
return _this();
}
/**
* @param ignoreExpressionFailures the ignoreExpressionFailures.
* @return the endpoint spec.
* @see DelayHandler#setIgnoreExpressionFailures(boolean)
*/
public DelayerEndpointSpec ignoreExpressionFailures(boolean ignoreExpressionFailures) {
this.handler.setIgnoreExpressionFailures(ignoreExpressionFailures);
return _this();
}
/**
* @param messageStore the message store.
* @return the endpoint spec.
*/
public DelayerEndpointSpec messageStore(MessageGroupStore messageStore) {
this.handler.setMessageStore(messageStore);
return _this();
}
/**
* Configure a list of {@link Advice} objects that will be applied, in nested order,
* when delayed messages are sent.
* @param advice the advice chain.
* @return the endpoint spec.
*/
public DelayerEndpointSpec delayedAdvice(Advice... advice) {
this.delayedAdvice.addAll(Arrays.asList(advice));
return _this();
}
public DelayerEndpointSpec delayExpression(Expression delayExpression) {
this.handler.setDelayExpression(delayExpression);
return this;
}
public DelayerEndpointSpec delayExpression(String delayExpression) {
this.handler.setDelayExpression(PARSER.parseExpression(delayExpression));
return this;
}
/**
* Specify the function to determine delay value against {@link Message}.
* Typically used with a Java 8 Lambda expression:
* <pre class="code">
* {@code
* .<Foo>delay("delayer", m -> m.getPayload().getDate(),
* c -> c.advice(this.delayedAdvice).messageStore(this.messageStore()))
* }
* </pre>
* @param delayFunction the {@link Function} to determine delay.
* @param <P> the payload type.
* @return the endpoint spec.
*/
public <P> DelayerEndpointSpec delayFunction(Function<Message<P>, Object> delayFunction) {
this.handler.setDelayExpression(new FunctionExpression<>(delayFunction));
return this;
}
}