org.springframework.integration.dsl.WireTapSpec Maven / Gradle / Ivy
/*
* Copyright 2016-2019 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
*
* https://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.Collections;
import java.util.Map;
import org.springframework.expression.Expression;
import org.springframework.integration.channel.interceptor.WireTap;
import org.springframework.integration.core.MessageSelector;
import org.springframework.integration.filter.ExpressionEvaluatingSelector;
import org.springframework.messaging.MessageChannel;
import org.springframework.util.Assert;
/**
* The {@link IntegrationComponentSpec} implementation for the {@link WireTap} component.
*
* @author Gary Russell
* @author Artem Bilan
*
* @since 5.0
*
*/
public class WireTapSpec extends IntegrationComponentSpec implements ComponentsRegistration {
private final MessageChannel channel;
private final String channelName;
private MessageSelector selector;
private Long timeout;
public WireTapSpec(MessageChannel channel) {
Assert.notNull(channel, "'channel' must not be null");
this.channel = channel;
this.channelName = null;
}
public WireTapSpec(String channelName) {
Assert.notNull(channelName, "'channelName' must not be null");
this.channelName = channelName;
this.channel = null;
}
public WireTapSpec selector(String selectorExpression) {
return selector(new ExpressionEvaluatingSelector(selectorExpression));
}
/**
* Specify an {@link Expression} for selector.
* @param selectorExpression the expression for selector.
* @return the current {@link WireTapSpec}
* @since 1.2
* @see WireTap#WireTap(MessageChannel, MessageSelector)
*/
public WireTapSpec selector(Expression selectorExpression) {
return selector(new ExpressionEvaluatingSelector(selectorExpression));
}
public WireTapSpec selector(MessageSelector selector) {
this.selector = selector;
return this;
}
public WireTapSpec timeout(long timeout) {
this.timeout = timeout;
return this;
}
@Override
protected WireTap doGet() {
WireTap wireTap;
if (this.channel != null) {
wireTap = new WireTap(this.channel, this.selector);
}
else {
wireTap = new WireTap(this.channelName, this.selector);
}
if (this.timeout != null) {
wireTap.setTimeout(this.timeout);
}
return wireTap;
}
@Override
public Map getComponentsToRegister() {
if (this.selector != null) {
return Collections.singletonMap(this.selector, null);
}
else {
return null;
}
}
}