1 files changed, 168 insertions, 0 deletions
diff --git a/src/main/java/org/openecomp/schema/OxmModelLoader.java b/src/main/java/org/openecomp/schema/OxmModelLoader.java
new file mode 100644
index 0000000..4ef77a2
--- /dev/null
+++ b/src/main/java/org/openecomp/schema/OxmModelLoader.java
@@ -0,0 +1,168 @@
+/**
+ * ============LICENSE_START=======================================================
+ * Gizmo
+ * ================================================================================
+ * 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 is a trademark and service mark of AT&T Intellectual Property.
+ */
+package org.openecomp.schema;
+
+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.crud.exception.CrudException;
+import org.openecomp.crud.logging.CrudServiceMsgs;
+import org.openecomp.crud.util.CrudServiceConstants;
+import org.openecomp.crud.util.FileWatcher;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
+import org.springframework.core.io.support.ResourcePatternResolver;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Date;
+import java.util.HashMap;
+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;
+
+
+public class OxmModelLoader {
+
+  private static Map<String, DynamicJAXBContext> versionContextMap
+      = new ConcurrentHashMap<String, DynamicJAXBContext>();
+  private static Map<String, Timer> timers = new ConcurrentHashMap<String, Timer>();
+
+  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() throws CrudException {
+    ClassLoader cl = OxmModelLoader.class.getClassLoader();
+    ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(cl);
+    Resource[] resources;
+    try {
+      resources = resolver.getResources("classpath*:/oxm/aai_oxm*.xml");
+    } catch (IOException ex) {
+      logger.error(CrudServiceMsgs.OXM_LOAD_ERROR, ex.getMessage());
+      throw new CrudException("", Status.NOT_FOUND);
+    }
+
+    if (resources.length == 0) {
+      logger.error(CrudServiceMsgs.OXM_LOAD_ERROR, "No OXM schema files found on classpath");
+      throw new CrudException("Failed to load schema", Status.NOT_FOUND);
+    }
+
+    for (Resource resource : resources) {
+      Matcher matcher = p.matcher(resource.getFilename());
+
+      if (matcher.matches()) {
+        try {
+          OxmModelLoader.loadModel(matcher.group(1), resource);
+        } catch (Exception e) {
+          logger.error(CrudServiceMsgs.OXM_LOAD_ERROR, "Failed to load " + resource.getFilename()
+              + ": " + e.getMessage());
+          throw new CrudException("Failed to load schema", Status.NOT_FOUND);
+        }
+      }
+    }
+  }
+
+  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(CrudServiceMsgs.OXM_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, IOException {
+    InputStream inputStream = new FileInputStream(file);
+    loadModel(version, file.getName(), inputStream);
+    addtimer(version, file);
+  }
+
+  private synchronized static void loadModel(String version, Resource resource)
+      throws JAXBException, IOException {
+    InputStream inputStream = resource.getInputStream();
+    loadModel(version, resource.getFilename(), inputStream);
+  }
+
+  private synchronized static void loadModel(String version, String resourceName,
+                                             InputStream inputStream)
+      throws JAXBException, IOException {
+    Map<String, Object> properties = new HashMap<String, Object>();
+    properties.put(JAXBContextProperties.OXM_METADATA_SOURCE, inputStream);
+    final DynamicJAXBContext jaxbContext = DynamicJAXBContextFactory
+        .createContextFromOXM(Thread.currentThread().getContextClassLoader(), properties);
+    versionContextMap.put(version, jaxbContext);
+    logger.info(CrudServiceMsgs.LOADED_OXM_FILE, resourceName);
+  }
+
+  public static DynamicJAXBContext getContextForVersion(String version) throws CrudException {
+    if (versionContextMap == null || versionContextMap.isEmpty()) {
+      loadModels();
+    } else if (!versionContextMap.containsKey(version)) {
+      try {
+        loadModel(version, new File(CrudServiceConstants.CRD_HOME_MODEL + "aai_oxm_"
+            + version + ".xml"));
+      } catch (Exception e) {
+        throw new CrudException("", Status.NOT_FOUND);
+      }
+    }
+
+    return versionContextMap.get(version);
+  }
+
+  public static Map<String, DynamicJAXBContext> getVersionContextMap() {
+    return versionContextMap;
+  }
+
+  public static void setVersionContextMap(Map<String, DynamicJAXBContext> versionContextMap) {
+    OxmModelLoader.versionContextMap = versionContextMap;
+  }
+
+}