1 files changed, 166 insertions, 0 deletions
diff --git a/src/main/java/org/openecomp/datarouter/util/OxmModelLoader.java b/src/main/java/org/openecomp/datarouter/util/OxmModelLoader.java
new file mode 100644
index 0000000..2919ba2
--- /dev/null
+++ b/src/main/java/org/openecomp/datarouter/util/OxmModelLoader.java
@@ -0,0 +1,166 @@
+/**
+ * ============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);
+            }
+         }
+      }
+   }
+
+}