/*
* 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.stratos.autoscaler.policy.deployers;
import java.io.File;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.xml.namespace.QName;
import org.apache.axiom.om.OMElement;
import org.apache.axis2.deployment.DeploymentException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.stratos.autoscaler.deployment.policy.DeploymentPolicy;
import org.apache.stratos.autoscaler.exception.InvalidPolicyException;
import org.apache.stratos.autoscaler.partition.PartitionGroup;
import org.apache.stratos.autoscaler.util.AutoscalerUtil;
import org.apache.stratos.cloud.controller.stub.deployment.partition.Partition;
import org.apache.stratos.cloud.controller.stub.pojo.Properties;
/**
*
* The Reader class for Deployment-policy definitions.
*/
public class DeploymentPolicyReader extends AbstractPolicyReader<DeploymentPolicy> {
private static final Log log = LogFactory.getLog(DeploymentPolicyReader.class);
public DeploymentPolicyReader(File file) {
super(file);
}
public DeploymentPolicy read() throws InvalidPolicyException{
DeploymentPolicy policy = new DeploymentPolicy();
try {
OMElement docEle = getDocument();
if("deploymentPolicy".equalsIgnoreCase(docEle.getLocalName())){
policy.setId(docEle.getAttributeValue(new QName("id")));
//Partition-Groups
Iterator<?> partitionGroupItr = docEle.getChildrenWithLocalName("partitionGroup");
while(partitionGroupItr.hasNext()){
List<PartitionGroup> partitionGroups = new ArrayList<PartitionGroup>();
Object nextGroup = partitionGroupItr.next();
if(nextGroup instanceof OMElement){
OMElement groupEle = (OMElement) nextGroup;
PartitionGroup group = new PartitionGroup();
group.setId(groupEle.getAttributeValue(new QName("id")));
group.setPartitionAlgo(readValue(groupEle, "partitionAlgo"));
List<Partition> partitions = new ArrayList<Partition>() ;
//Partitions
Iterator<?> partitionItr = groupEle.getChildrenWithLocalName("partition");
while(partitionItr.hasNext()){
Object next = partitionItr.next();
if(next instanceof OMElement){
OMElement partitionElt = (OMElement) next;
String partitionId = partitionElt.getAttributeValue(new QName("id"));
if (partitionId != null) {
Partition partition = new Partition();
partition.setId(partitionId);
String maxValue = readValue(partitionElt, "max");
if (maxValue != null) {
partition.setPartitionMax(Integer.valueOf(maxValue));
}
String minValue = readValue(partitionElt, "min");
if (minValue != null) {
partition.setPartitionMin(Integer.valueOf(minValue));
}
String providerValue = readValue(partitionElt, "provider");
if (providerValue != null) {
partition.setProvider(providerValue);
}
Properties properties = AutoscalerUtil.getProperties(partitionElt);
if (properties != null) {
partition.setProperties(properties);
}
partitions.add(partition);
} else {
log.warn("Invalid Partition id: null. Partition will be ignored.");
}
}
}
if(group.getPartitions() == null) {
group.setPartitions(new Partition[0]);
}
group.setPartitions(partitions.toArray(group.getPartitions()));
partitionGroups.add(group);
}
if(policy.getPartitionGroups() == null) {
policy.setPartitionGroups(new PartitionGroup[0]);
}
policy.setPartitionGroups(partitionGroups.toArray(policy.getPartitionGroups()));
}
} else{
throw new DeploymentException("File is not a valid deployment policy");
}
} catch (Exception e){
log.error("Malformed deployment policy file", e);
throw new InvalidPolicyException("Malformed deployment policy file",e);
} finally{
closeStream();
}
return policy;
}
}