/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.camel.model;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.ScheduledExecutorService;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlTransient;
import org.apache.camel.Expression;
import org.apache.camel.Processor;
import org.apache.camel.builder.ExpressionBuilder;
import org.apache.camel.model.language.ExpressionDefinition;
import org.apache.camel.processor.Delayer;
import org.apache.camel.spi.RouteContext;
import org.apache.camel.util.ObjectHelper;
import org.apache.camel.util.concurrent.ExecutorServiceHelper;
/**
* Represents an XML <delay/> element
*
* @version $Revision: 959977 $
*/
@XmlRootElement(name = "delay")
@XmlAccessorType(XmlAccessType.FIELD)
public class DelayDefinition extends ExpressionNode implements ExecutorServiceAwareDefinition<DelayDefinition> {
@XmlTransient
private ExecutorService executorService;
@XmlAttribute(required = false)
private String executorServiceRef;
@XmlAttribute
private Boolean asyncDelayed;
@XmlAttribute
private Boolean callerRunsWhenRejected = Boolean.TRUE;
public DelayDefinition() {
}
public DelayDefinition(Expression delay) {
super(delay);
}
@Override
public String getLabel() {
return "delay";
}
@Override
public String getShortName() {
return "delay";
}
@Override
public String toString() {
return "Delay[" + getExpression() + " -> " + getOutputs() + "]";
}
@Override
public Processor createProcessor(RouteContext routeContext) throws Exception {
Processor childProcessor = this.createChildProcessor(routeContext, false);
Expression delay = createAbsoluteTimeDelayExpression(routeContext);
ScheduledExecutorService scheduled = null;
if (getAsyncDelayed() != null && getAsyncDelayed()) {
scheduled = ExecutorServiceHelper.getConfiguredScheduledExecutorService(routeContext, "Delay", this);
if (scheduled == null) {
scheduled = routeContext.getCamelContext().getExecutorServiceStrategy().newScheduledThreadPool(this, "Delay");
}
}
Delayer answer = new Delayer(childProcessor, delay, scheduled);
if (getAsyncDelayed() != null) {
answer.setAsyncDelayed(getAsyncDelayed());
}
if (getCallerRunsWhenRejected() != null) {
answer.setCallerRunsWhenRejected(getCallerRunsWhenRejected());
}
return answer;
}
private Expression createAbsoluteTimeDelayExpression(RouteContext routeContext) {
ExpressionDefinition expr = getExpression();
if (expr != null) {
if (ObjectHelper.isNotEmpty(expr.getExpression()) || expr.getExpressionValue() != null) {
return expr.createExpression(routeContext);
}
}
return null;
}
// Fluent API
// -------------------------------------------------------------------------
/**
* Sets the delay time in millis to delay
*
* @param delay delay time in millis
* @return the builder
*/
public DelayDefinition delayTime(Long delay) {
setExpression(new ExpressionDefinition(ExpressionBuilder.constantExpression(delay)));
return this;
}
/**
* Whether or not the caller should run the task when it was rejected by the thread pool.
* <p/>
* Is by default <tt>true</tt>
*
* @param callerRunsWhenRejected whether or not the caller should run
* @return the builder
*/
public DelayDefinition callerRunsWhenRejected(boolean callerRunsWhenRejected) {
setCallerRunsWhenRejected(callerRunsWhenRejected);
return this;
}
/**
* Enables asynchronous delay which means the thread will <b>noy</b> block while delaying.
*
* @return the builder
*/
public DelayDefinition asyncDelayed() {
setAsyncDelayed(true);
return this;
}
public DelayDefinition executorService(ExecutorService executorService) {
setExecutorService(executorService);
return this;
}
public DelayDefinition executorServiceRef(String executorServiceRef) {
setExecutorServiceRef(executorServiceRef);
return this;
}
// Properties
// -------------------------------------------------------------------------
public Boolean getAsyncDelayed() {
return asyncDelayed;
}
public void setAsyncDelayed(Boolean asyncDelayed) {
this.asyncDelayed = asyncDelayed;
}
public Boolean getCallerRunsWhenRejected() {
return callerRunsWhenRejected;
}
public void setCallerRunsWhenRejected(Boolean callerRunsWhenRejected) {
this.callerRunsWhenRejected = callerRunsWhenRejected;
}
public ExecutorService getExecutorService() {
return executorService;
}
public void setExecutorService(ExecutorService executorService) {
this.executorService = executorService;
}
public String getExecutorServiceRef() {
return executorServiceRef;
}
public void setExecutorServiceRef(String executorServiceRef) {
this.executorServiceRef = executorServiceRef;
}
}