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/**
* ============LICENSE_START=======================================================
* DataRouter
* ================================================================================
* Copyright © 2017 AT&T Intellectual Property.
* Copyright © 2017 Amdocs
* 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.
* ============LICENSE_END=========================================================
*
* ECOMP and OpenECOMP are trademarks
* and service marks of AT&T Intellectual Property.
*/
package org.openecomp.datarouter.util;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.ConcurrentHashMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.ws.rs.core.Response.Status;
import javax.xml.bind.JAXBException;
import org.eclipse.persistence.jaxb.JAXBContextProperties;
import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContext;
import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContextFactory;
import org.openecomp.cl.eelf.LoggerFactory;
import org.openecomp.datarouter.logging.DataRouterMsgs;
import org.openecomp.datarouter.util.ExternalOxmModelProcessor;
public class OxmModelLoader {
private static Map<String, DynamicJAXBContext> versionContextMap = new ConcurrentHashMap<String, DynamicJAXBContext>();
private static Map<String, Timer> timers = new ConcurrentHashMap<String, Timer>();
private static List<ExternalOxmModelProcessor> oxmModelProcessorRegistry = new ArrayList<ExternalOxmModelProcessor>();
final static Pattern p = Pattern.compile("aai_oxm_(.*).xml");
private static org.openecomp.cl.api.Logger logger = LoggerFactory.getInstance()
.getLogger(OxmModelLoader.class.getName());
public synchronized static void loadModels() {
File[] listOfFiles = new File(DataRouterConstants.DR_HOME_MODEL).listFiles();
if (listOfFiles != null) {
for (File file : listOfFiles) {
if (file.isFile()) {
Matcher m = p.matcher(file.getName());
if (m.matches()) {
try {
OxmModelLoader.loadModel(m.group(1), file);
} catch (Exception e) {
logger.error(DataRouterMsgs.INVALID_OXM_FILE, file.getName(), e.getMessage());
}
}
}
}
} else {
logger.error(DataRouterMsgs.INVALID_OXM_DIR, DataRouterConstants.DR_HOME_MODEL);
}
}
private static void addtimer(String version,File file){
TimerTask task = null;
task = new FileWatcher(
file) {
protected void onChange(File file) {
// here we implement the onChange
logger.info(DataRouterMsgs.FILE_CHANGED, file.getName());
try {
OxmModelLoader.loadModel(version,file);
} catch (Exception e) {
e.printStackTrace();
}
}
};
if (!timers.containsKey(version)) {
Timer timer = new Timer("oxm-"+version);
timer.schedule(task, new Date(), 10000);
timers.put(version, timer);
}
}
private synchronized static void loadModel(String version,File file) throws JAXBException, FileNotFoundException {
InputStream iStream = new FileInputStream(file);
Map<String, Object> properties = new HashMap<String, Object>();
properties.put(JAXBContextProperties.OXM_METADATA_SOURCE, iStream);
final DynamicJAXBContext jaxbContext = DynamicJAXBContextFactory
.createContextFromOXM(Thread.currentThread().getContextClassLoader(), properties);
versionContextMap.put(version, jaxbContext);
if ( oxmModelProcessorRegistry != null) {
for ( ExternalOxmModelProcessor processor : oxmModelProcessorRegistry ) {
processor.onOxmVersionChange(Version.valueOf(version), jaxbContext );
}
}
addtimer(version,file);
}
public static DynamicJAXBContext getContextForVersion(String version) throws Exception {
if (versionContextMap == null || versionContextMap.isEmpty()) {
loadModels();
} else if (!versionContextMap.containsKey(version)) {
try {
loadModel(version,new File (DataRouterConstants.DR_HOME_MODEL + "aai_oxm_" + version + ".xml"));
} catch (Exception e) {
throw new Exception(Status.NOT_FOUND.toString());
}
}
return versionContextMap.get(version);
}
public static Map<String, DynamicJAXBContext> getVersionContextMap() {
return versionContextMap;
}
public static void setVersionContextMap(Map<String, DynamicJAXBContext> versionContextMap) {
OxmModelLoader.versionContextMap = versionContextMap;
}
public synchronized static void registerExternalOxmModelProcessors(Collection<ExternalOxmModelProcessor> processors) {
if(processors != null) {
for(ExternalOxmModelProcessor processor : processors) {
if(!oxmModelProcessorRegistry.contains(processor)) {
oxmModelProcessorRegistry.add(processor);
}
}
}
}
}
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