/*
* 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.synapse.config.xml;
import org.apache.axiom.om.OMAttribute;
import org.apache.axiom.om.OMElement;
import org.apache.synapse.Mediator;
import org.apache.synapse.mediators.base.SequenceMediator;
import org.apache.synapse.mediators.builtin.DropMediator;
import org.apache.synapse.mediators.eip.aggregator.AggregateMediator;
import org.jaxen.JaxenException;
import javax.xml.namespace.QName;
import java.util.Properties;
/**
* Factory for {@link AggregateMediator} instances from the config;
*
* <pre>
* <aggregate>
* <correlateOn expression="xpath"/>?
* <completeCondition [timeout="time-in-seconds"]>
* <messageCount min="int-min" max="int-max"/>?
* </completeCondition>?
* <onComplete expression="xpath" [sequence="sequence-ref"]>
* (mediator +)?
* </onComplete>
* </aggregate>
* </pre>
*/
public class AggregateMediatorFactory extends AbstractMediatorFactory {
/** Element QName definitions **/
protected static final QName AGGREGATE_Q
= new QName(XMLConfigConstants.SYNAPSE_NAMESPACE, "aggregate");
protected static final QName CORELATE_ON_Q
= new QName(XMLConfigConstants.SYNAPSE_NAMESPACE, "correlateOn");
protected static final QName COMPLETE_CONDITION_Q
= new QName(XMLConfigConstants.SYNAPSE_NAMESPACE, "completeCondition");
protected static final QName MESSAGE_COUNT_Q
= new QName(XMLConfigConstants.SYNAPSE_NAMESPACE, "messageCount");
protected static final QName ON_COMPLETE_Q
= new QName(XMLConfigConstants.SYNAPSE_NAMESPACE, "onComplete");
/** Attribute QName definitions **/
private static final QName EXPRESSION_Q
= new QName(XMLConfigConstants.NULL_NAMESPACE, "expression");
private static final QName TIMEOUT_Q
= new QName(XMLConfigConstants.NULL_NAMESPACE, "timeout");
private static final QName MIN_Q
= new QName(XMLConfigConstants.NULL_NAMESPACE, "min");
private static final QName MAX_Q
= new QName(XMLConfigConstants.NULL_NAMESPACE, "max");
private static final QName SEQUENCE_Q
= new QName(XMLConfigConstants.NULL_NAMESPACE, "sequence");
protected Mediator createSpecificMediator(OMElement elem, Properties properties) {
AggregateMediator mediator = new AggregateMediator();
processAuditStatus(mediator, elem);
OMElement corelateOn = elem.getFirstChildWithName(CORELATE_ON_Q);
if (corelateOn != null) {
OMAttribute corelateExpr = corelateOn.getAttribute(EXPRESSION_Q);
if (corelateExpr != null) {
try {
mediator.setCorrelateExpression(
SynapseXPathFactory.getSynapseXPath(corelateOn, EXPRESSION_Q));
} catch (JaxenException e) {
handleException("Unable to load the corelate XPATH expression", e);
}
}
}
OMElement completeCond = elem.getFirstChildWithName(COMPLETE_CONDITION_Q);
if (completeCond != null) {
OMAttribute completeTimeout = completeCond.getAttribute(TIMEOUT_Q);
if (completeTimeout != null) {
mediator.setCompletionTimeoutMillis(
Long.parseLong(completeTimeout.getAttributeValue()) * 1000);
}
OMElement messageCount = completeCond.getFirstChildWithName(MESSAGE_COUNT_Q);
if (messageCount != null) {
OMAttribute min = messageCount.getAttribute(MIN_Q);
if (min != null) {
mediator.setMinMessagesToComplete(Integer.parseInt(min.getAttributeValue()));
}
OMAttribute max = messageCount.getAttribute(MAX_Q);
if (max != null) {
mediator.setMaxMessagesToComplete(Integer.parseInt(max.getAttributeValue()));
}
}
}
OMElement onComplete = elem.getFirstChildWithName(ON_COMPLETE_Q);
if (onComplete != null) {
OMAttribute aggregateExpr = onComplete.getAttribute(EXPRESSION_Q);
if (aggregateExpr != null) {
try {
mediator.setAggregationExpression(
SynapseXPathFactory.getSynapseXPath(onComplete, EXPRESSION_Q));
} catch (JaxenException e) {
handleException("Unable to load the aggregating XPATH", e);
}
}
OMAttribute onCompleteSequence = onComplete.getAttribute(SEQUENCE_Q);
if (onCompleteSequence != null) {
mediator.setOnCompleteSequenceRef(onCompleteSequence.getAttributeValue());
} else if (onComplete.getFirstElement() != null) {
mediator.setOnCompleteSequence((new SequenceMediatorFactory())
.createAnonymousSequence(onComplete, properties));
} else {
SequenceMediator sequence = new SequenceMediator();
sequence.addChild(new DropMediator());
mediator.setOnCompleteSequence(sequence);
}
}
return mediator;
}
public QName getTagQName() {
return AGGREGATE_Q;
}
}