--- /dev/null
+/**
+ * ============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.onap.schema;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.Date;
+import java.util.List;
+import java.util.Map;
+import java.util.SortedSet;
+import java.util.Timer;
+import java.util.TimerTask;
+import java.util.TreeSet;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+
+import javax.ws.rs.core.Response.Status;
+
+import org.apache.commons.io.IOUtils;
+import org.onap.aai.cl.eelf.LoggerFactory;
+import org.onap.crud.exception.CrudException;
+import org.onap.crud.logging.CrudServiceMsgs;
+import org.onap.crud.util.CrudServiceConstants;
+import org.onap.crud.util.FileWatcher;
+import org.springframework.core.io.UrlResource;
+import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
+import org.springframework.core.io.support.ResourcePatternResolver;
+
+public class RelationshipSchemaLoader {
+
+ private static Map<String, RelationshipSchema> versionContextMap = new ConcurrentHashMap<>();
+ private static SortedSet<Integer> versions = new TreeSet<Integer>();
+ private static Map<String, Timer> timers = new ConcurrentHashMap<String, Timer>();
+ final static String edgePropsFiles = "edge_properties_";
+ final static String fileExt = ".json";
+ final static Pattern rulesFilePattern = Pattern.compile("DbEdgeRules(.*)" + fileExt);
+ final static Pattern propsFilePattern = Pattern.compile(edgePropsFiles + "(.*)" + fileExt);
+ final static Pattern versionPattern = Pattern.compile(".*(v\\d+)" + fileExt);
+
+ private static org.onap.aai.cl.api.Logger logger = LoggerFactory.getInstance()
+ .getLogger(RelationshipSchemaLoader.class.getName());
+
+ public synchronized static void loadModels() throws CrudException {
+ load(rulesFilePattern, propsFilePattern);
+ }
+
+ public synchronized static void loadModels(String version) throws CrudException {
+ String pattern = String.format(".*(%s)" + fileExt, version);
+ load(Pattern.compile(pattern), Pattern.compile(edgePropsFiles + version + fileExt));
+ }
+
+ public static RelationshipSchema getSchemaForVersion(String version) throws CrudException {
+ if (versionContextMap == null || versionContextMap.isEmpty()) {
+ loadModels();
+ } else if (!versionContextMap.containsKey(version)) {
+ try {
+ loadModels(version);
+ } catch (Exception e) {
+ throw new CrudException("", Status.NOT_FOUND);
+ }
+ }
+ RelationshipSchema schema = versionContextMap.get(version);
+ if (schema == null) {
+ throw new CrudException("", Status.NOT_FOUND);
+ } else
+ return schema;
+ }
+
+ public static String getLatestSchemaVersion() throws CrudException {
+ return "v" + versions.last();
+ }
+
+ public static Map<String, RelationshipSchema> getVersionContextMap() {
+ return versionContextMap;
+ }
+
+ public static void setVersionContextMap(Map<String, RelationshipSchema> versionContextMap) {
+ RelationshipSchemaLoader.versionContextMap = versionContextMap;
+ }
+
+ public static void resetVersionContextMap() {
+ RelationshipSchemaLoader.versionContextMap = new ConcurrentHashMap<>();
+ }
+
+ private static void load(Pattern rulesPattern, Pattern edgePropsPattern) throws CrudException {
+ ClassLoader cl = RelationshipSchemaLoader.class.getClassLoader();
+ ResourcePatternResolver rulesResolver = new PathMatchingResourcePatternResolver(cl);
+ List<Object> rulesFiles;
+ String rulesDir = CrudServiceConstants.CRD_HOME_MODEL;
+ try {
+
+ // getResources method returns objects of type "Resource"
+ // 1. We are getting all the objects from the classpath which has
+ // "DbEdgeRules" in the name.
+ // 2. We run them through a filter and return only the objects which match
+ // the supplied pattern "p"
+ // 3. We then collect the objects in a list. At this point we have a list
+ // of the kind of files we require.
+ rulesFiles = Arrays.stream(rulesResolver.getResources("classpath*:/dbedgerules/DbEdgeRules*" + fileExt))
+ .filter(r -> !myMatcher(rulesPattern, r.getFilename()).isEmpty()).collect(Collectors.toList());
+
+ // This gets all the objects of type "File" from external directory (not
+ // on the classpath)
+ // 1. From an external directory (one not on the classpath) we get all the
+ // objects of type "File"
+ // 2. We only return the files whose names matched the supplied pattern
+ // "p2".
+ // 3. We then collect all the objects in a list and add the contents of
+ // this list
+ // to the previous collection (rulesFiles)
+ rulesFiles
+ .addAll(Arrays.stream(new File(rulesDir).listFiles((d, name) -> edgePropsPattern.matcher(name).matches()))
+ .collect(Collectors.toList()));
+
+ if (rulesFiles.isEmpty()) {
+ logger.error(CrudServiceMsgs.INVALID_OXM_DIR, rulesDir);
+ throw new FileNotFoundException("DbEdgeRules and edge_properties files were not found.");
+ }
+
+ // Sort and then group the files with their versions, convert them to the
+ // schema, and add them to versionContextMap
+ // 1. Sort the files. We need the DbEdgeRules files to be before the
+ // edgeProperties files.
+ // 2. Group the files with their versions. ie. v11 ->
+ // ["DbEdgeRule_v11.json", "edgeProperties_v11.json"].
+ // The "group method" returns a HashMap whose key is the version and the
+ // value is a list of objects.
+ // 3. Go through each version and map the files into one schema using the
+ // "jsonFilesLoader" method.
+ // Also update the "versionContextMap" with the version and it's schema.
+ rulesFiles.stream().sorted(Comparator.comparing(RelationshipSchemaLoader::filename))
+ .collect(Collectors.groupingBy(f -> myMatcher(versionPattern, filename(f))))
+ .forEach((version, resourceAndFile) -> {
+ if (resourceAndFile.size() == 2) {
+ versionContextMap.put(version, jsonFilesLoader(version, resourceAndFile));
+ } else {
+ String filenames = resourceAndFile.stream().map(f -> filename(f)).collect(Collectors.toList()).toString();
+ String errorMsg = "Expecting a rules and a edge_properties files for " + version + ". Found: "
+ + filenames;
+ logger.warn(CrudServiceMsgs.INVALID_OXM_FILE, errorMsg);
+ }
+ });
+ logger.info(CrudServiceMsgs.LOADED_OXM_FILE, "Relationship Schema and Properties files: "
+ + rulesFiles.stream().map(f -> filename(f)).collect(Collectors.toList()));
+ } catch (IOException e) {
+ logger.error(CrudServiceMsgs.INVALID_OXM_DIR, rulesDir);
+ throw new CrudException("DbEdgeRules or edge_properties files were not found.", new FileNotFoundException());
+ }
+ }
+
+ private static String filename(Object k) throws ClassCastException {
+ if (k instanceof UrlResource) {
+ return ((UrlResource) k).getFilename();
+ } else if (k instanceof File) {
+ return ((File) k).getName();
+ } else {
+ throw new ClassCastException();
+ }
+ }
+
+ private static RelationshipSchema jsonFilesLoader(String version, List<Object> files) {
+ List<String> fileContents = new ArrayList<>();
+ RelationshipSchema rsSchema = null;
+ if (files.size() == 2) {
+ for (Object file : files) {
+ fileContents.add(jsonToRelationSchema(version, file));
+ versions.add(Integer.parseInt(version.substring(1)));
+ }
+
+ try {
+ rsSchema = new RelationshipSchema(fileContents);
+ } catch (CrudException | IOException e) {
+ e.printStackTrace();
+ logger.error(CrudServiceMsgs.INVALID_OXM_FILE,
+ files.stream().map(f -> filename(f)).collect(Collectors.toList()).toString(), e.getMessage());
+ }
+ return rsSchema;
+ }
+ return rsSchema;
+ }
+
+ private synchronized static void updateVersionContext(String version, RelationshipSchema rs) {
+ versionContextMap.put(version, rs);
+ }
+
+ private synchronized static String jsonToRelationSchema(String version, Object file) {
+ InputStream inputStream = null;
+ String content = null;
+
+ try {
+ if (file instanceof UrlResource) {
+ inputStream = ((UrlResource) file).getInputStream();
+ } else {
+ inputStream = new FileInputStream((File) file);
+ addtimer(version, file);
+ }
+ content = IOUtils.toString(inputStream, "UTF-8");
+ } catch (IOException e) {
+ e.printStackTrace();
+ }
+ return content;
+ }
+
+ private static void addtimer(String version, Object file) {
+ TimerTask task = null;
+ task = new FileWatcher((File) file) {
+ protected void onChange(File file) {
+ // here we implement the onChange
+ logger.info(CrudServiceMsgs.OXM_FILE_CHANGED, file.getName());
+
+ try {
+ // Cannot use the file object here because we also have to get the
+ // edge properties associated with that version.
+ // The properties are stored in a different file.
+ RelationshipSchemaLoader.loadModels(version);
+ } catch (Exception e) {
+ e.printStackTrace();
+ }
+ }
+ };
+
+ if (!timers.containsKey(version)) {
+ Timer timer = new Timer("db_edge_rules_" + version);
+ timer.schedule(task, new Date(), 10000);
+ timers.put(version, timer);
+
+ }
+ }
+
+ private static String myMatcher(Pattern p, String s) {
+ Matcher m = p.matcher(s);
+ return m.matches() ? m.group(1) : "";
+ }
+}
Code Review / aai / gizmo.git / blobdiff