001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.camel.model;
018
019 import javax.xml.bind.annotation.XmlAccessType;
020 import javax.xml.bind.annotation.XmlAccessorType;
021 import javax.xml.bind.annotation.XmlRootElement;
022
023 import org.apache.camel.Expression;
024 import org.apache.camel.Processor;
025 import org.apache.camel.builder.ExpressionBuilder;
026 import org.apache.camel.model.language.ExpressionDefinition;
027 import org.apache.camel.processor.Delayer;
028 import org.apache.camel.spi.RouteContext;
029 import org.apache.camel.util.ObjectHelper;
030
031 /**
032 * Represents an XML <delay/> element
033 *
034 * @version $Revision: 781713 $
035 */
036 @XmlRootElement(name = "delay")
037 @XmlAccessorType(XmlAccessType.FIELD)
038 public class DelayDefinition extends ExpressionNode {
039
040 public DelayDefinition() {
041 }
042
043 public DelayDefinition(Expression delay) {
044 super(delay);
045 }
046
047 @Override
048 public String getLabel() {
049 return "delay";
050 }
051
052 @Override
053 public String getShortName() {
054 return "delay";
055 }
056
057 @Override
058 public String toString() {
059 return "Delay[" + getExpression() + " -> " + getOutputs() + "]";
060 }
061
062 // Fluent API
063 // -------------------------------------------------------------------------
064
065 /**
066 * Sets the delay time in millis to delay
067 *
068 * @param delay delay time in millis
069 * @return the builder
070 */
071 public DelayDefinition delayTime(Long delay) {
072 setExpression(new ExpressionDefinition(ExpressionBuilder.constantExpression(delay)));
073 return this;
074 }
075
076 @Override
077 public Processor createProcessor(RouteContext routeContext) throws Exception {
078 Processor childProcessor = routeContext.createProcessor(this);
079 Expression delay = createAbsoluteTimeDelayExpression(routeContext);
080 return new Delayer(childProcessor, delay);
081 }
082
083 private Expression createAbsoluteTimeDelayExpression(RouteContext routeContext) {
084 ExpressionDefinition expr = getExpression();
085 if (expr != null) {
086 if (ObjectHelper.isNotEmpty(expr.getExpression()) || expr.getExpressionValue() != null) {
087 return expr.createExpression(routeContext);
088 }
089 }
090 return null;
091 }
092 }