/*
* Copyright (c) 2008, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* 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
*
* 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.wso2.carbon.billing.mgt.api;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.xpath.AXIOMXPath;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jaxen.JaxenException;
import org.wso2.carbon.billing.core.BillingException;
import org.wso2.carbon.billing.core.dataobjects.Cash;
import org.wso2.carbon.billing.mgt.dataobjects.MultitenancyPackage;
import org.wso2.carbon.common.util.CommonUtil;
import org.wso2.carbon.utils.CarbonUtils;
import javax.xml.namespace.QName;
import java.io.File;
import java.io.FileInputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class MultitenancyBillingInfo {
private static Log log = LogFactory.getLog(MultitenancyBillingInfo.class);
private static final String PACKAGE_DESCRIPTION_CONFIG = "multitenancy-packages.xml";
private static final String PACKAGE_DESCRIPTION_CONFIG_NS =
"http://wso2.com/carbon/multitenancy/billing/pacakges";
List<MultitenancyPackage> multitenancyPackages = new ArrayList<MultitenancyPackage>();
public MultitenancyBillingInfo() throws BillingException {
// this should be only available to the super tenants..
multitenancyPackages = deserializePackageDescriptionConfig();
}
public List<MultitenancyPackage> getMultitenancyPackages() {
return multitenancyPackages;
}
/*
* Deserialize following XML
<packages xmlns="http://wso2.com/carbon/multitenancy/billing/pacakges">
<package name="multitenancy-free">
<!--<subscriptionCharge>0</subscriptionCharge>--> <!-- $ per month -->
<users>
<limit>5</limit>
<charge>0</charge> <!-- charge per month -->
</users>
<resourceVolume>
<limit>10</limit> <!--mb per user -->
</resourceVolume>
<bandwidth>
<limit>1000</limit> <!-- mb per user -->
<overuseCharge>0</overuseCharge> <!-- $ per user per month -->
</bandwidth>
</package>
<package name="multitenancy-small">
...
</package>
</packages>
*/
private List<MultitenancyPackage> deserializePackageDescriptionConfig() throws BillingException {
String configFilePath = CarbonUtils.getCarbonConfigDirPath() + File.separator +
PACKAGE_DESCRIPTION_CONFIG;
OMElement packageConfigs;
try {
packageConfigs = CommonUtil.buildOMElement(new FileInputStream(configFilePath));
} catch (Exception e) {
String msg = "Error in deserializing the packageConfigs file: " + configFilePath + ".";
log.error(msg, e);
throw new BillingException(msg, e);
}
Iterator packageConfigsChildsIt = packageConfigs.getChildElements();
while (packageConfigsChildsIt.hasNext()) {
OMElement packageConfigEle = (OMElement) packageConfigsChildsIt.next();
if (!new QName(PACKAGE_DESCRIPTION_CONFIG_NS, "package").equals(
packageConfigEle.getQName())) {
continue;
}
MultitenancyPackage multitenancyPackage = new MultitenancyPackage();
String packageName = packageConfigEle.getAttributeValue(new QName("name"));
String usersLimit = getPackageConfigValue("users.limit", packageConfigEle);
String usersCharge = getPackageConfigValue("users.charge", packageConfigEle);
String resourceVolumeLimit =
getPackageConfigValue("resourceVolume.limit", packageConfigEle);
String bandwidthLimit = getPackageConfigValue("bandwidth.limit", packageConfigEle);
String bandwidthOveruseCharge =
getPackageConfigValue("bandwidth.overuseCharge", packageConfigEle);
int usersLimitInt = -1;
if (!usersLimit.equals("unlimited")) {
usersLimitInt = Integer.parseInt(usersLimit);
}
int resourceVolumeLimitInt = -1;
if (!resourceVolumeLimit.equals("unlimited")) {
resourceVolumeLimitInt = Integer.parseInt(resourceVolumeLimit);
}
int bandwidthLimitInt = -1;
if (!bandwidthLimit.equals("unlimited")) {
bandwidthLimitInt = Integer.parseInt(bandwidthLimit);
}
multitenancyPackage.setName(packageName);
multitenancyPackage.setUsersLimit(usersLimitInt);
multitenancyPackage.setChargePerUser(new Cash(usersCharge));
multitenancyPackage.setResourceVolumeLimit(resourceVolumeLimitInt);
multitenancyPackage.setBandwidthLimit(bandwidthLimitInt);
multitenancyPackage.setBandwidthOveruseCharge(new Cash(bandwidthOveruseCharge));
multitenancyPackages.add(multitenancyPackage);
}
return multitenancyPackages;
}
private String getPackageConfigValue(String key, OMElement packageNode) throws BillingException {
String qualifiedKey = "ns:" + key.replaceAll("\\.", "/ns:");
AXIOMXPath xpathExpression;
try {
xpathExpression = new AXIOMXPath(qualifiedKey);
xpathExpression.addNamespace("ns", PACKAGE_DESCRIPTION_CONFIG_NS);
List valueNodes = xpathExpression.selectNodes(packageNode);
if (valueNodes.isEmpty()) {
if (log.isDebugEnabled()) {
String msg = "No results found parsing package configuration for key: " +
qualifiedKey + ".";
log.debug(msg);
}
return null;
}
OMElement valueNode = (OMElement) valueNodes.get(0);
return valueNode.getText();
} catch (JaxenException e) {
String msg = "Error in retrieving the key: " + qualifiedKey + ".";
log.error(msg, e);
throw new BillingException(msg, e);
}
}
}