2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
6 * Copyright © 2017-2018 Amdocs
7 * ================================================================================
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 * ============LICENSE_END=========================================================
21 package org.onap.schema;
24 import java.io.FileInputStream;
25 import java.io.FileNotFoundException;
26 import java.io.IOException;
27 import java.io.InputStream;
28 import java.util.ArrayList;
29 import java.util.Arrays;
30 import java.util.Comparator;
31 import java.util.Date;
32 import java.util.List;
34 import java.util.SortedSet;
35 import java.util.Timer;
36 import java.util.TimerTask;
37 import java.util.TreeSet;
38 import java.util.concurrent.ConcurrentHashMap;
39 import java.util.regex.Matcher;
40 import java.util.regex.Pattern;
41 import java.util.stream.Collectors;
43 import javax.ws.rs.core.Response.Status;
45 import org.apache.commons.io.IOUtils;
46 import org.onap.aai.cl.eelf.LoggerFactory;
47 import org.onap.crud.exception.CrudException;
48 import org.onap.crud.logging.CrudServiceMsgs;
49 import org.onap.crud.util.CrudServiceConstants;
50 import org.onap.crud.util.FileWatcher;
51 import org.springframework.core.io.UrlResource;
52 import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
53 import org.springframework.core.io.support.ResourcePatternResolver;
55 public class RelationshipSchemaLoader {
57 private static Map<String, RelationshipSchema> versionContextMap = new ConcurrentHashMap<>();
58 private static SortedSet<Integer> versions = new TreeSet<Integer>();
59 private static Map<String, Timer> timers = new ConcurrentHashMap<String, Timer>();
60 final static String edgePropsFiles = "edge_properties_";
61 final static String fileExt = ".json";
62 final static Pattern rulesFilePattern = Pattern.compile("DbEdgeRules(.*)" + fileExt);
63 final static Pattern propsFilePattern = Pattern.compile(edgePropsFiles + "(.*)" + fileExt);
64 final static Pattern versionPattern = Pattern.compile(".*(v\\d+)" + fileExt);
66 private static org.onap.aai.cl.api.Logger logger = LoggerFactory.getInstance()
67 .getLogger(RelationshipSchemaLoader.class.getName());
69 public synchronized static void loadModels() throws CrudException {
70 load(rulesFilePattern, propsFilePattern);
73 public synchronized static void loadModels(String version) throws CrudException {
74 String pattern = String.format(".*(%s)" + fileExt, version);
75 load(Pattern.compile(pattern), Pattern.compile(edgePropsFiles + version + fileExt));
78 public static RelationshipSchema getSchemaForVersion(String version) throws CrudException {
79 if (versionContextMap == null || versionContextMap.isEmpty()) {
81 } else if (!versionContextMap.containsKey(version)) {
84 } catch (Exception e) {
85 throw new CrudException("", Status.NOT_FOUND);
88 RelationshipSchema schema = versionContextMap.get(version);
90 throw new CrudException("", Status.NOT_FOUND);
95 public static String getLatestSchemaVersion() throws CrudException {
96 return "v" + versions.last();
99 public static Map<String, RelationshipSchema> getVersionContextMap() {
100 return versionContextMap;
103 public static void setVersionContextMap(Map<String, RelationshipSchema> versionContextMap) {
104 RelationshipSchemaLoader.versionContextMap = versionContextMap;
107 public static void resetVersionContextMap() {
108 RelationshipSchemaLoader.versionContextMap = new ConcurrentHashMap<>();
111 private static void load(Pattern rulesPattern, Pattern edgePropsPattern) throws CrudException {
112 ClassLoader cl = RelationshipSchemaLoader.class.getClassLoader();
113 ResourcePatternResolver rulesResolver = new PathMatchingResourcePatternResolver(cl);
114 List<Object> rulesFiles;
115 String rulesDir = CrudServiceConstants.CRD_HOME_MODEL;
118 // getResources method returns objects of type "Resource"
119 // 1. We are getting all the objects from the classpath which has
120 // "DbEdgeRules" in the name.
121 // 2. We run them through a filter and return only the objects which match
122 // the supplied pattern "p"
123 // 3. We then collect the objects in a list. At this point we have a list
124 // of the kind of files we require.
125 rulesFiles = Arrays.stream(rulesResolver.getResources("classpath*:/dbedgerules/DbEdgeRules*" + fileExt))
126 .filter(r -> !myMatcher(rulesPattern, r.getFilename()).isEmpty()).collect(Collectors.toList());
128 // This gets all the objects of type "File" from external directory (not
130 // 1. From an external directory (one not on the classpath) we get all the
131 // objects of type "File"
132 // 2. We only return the files whose names matched the supplied pattern
134 // 3. We then collect all the objects in a list and add the contents of
136 // to the previous collection (rulesFiles)
138 .addAll(Arrays.stream(new File(rulesDir).listFiles((d, name) -> edgePropsPattern.matcher(name).matches()))
139 .collect(Collectors.toList()));
141 if (rulesFiles.isEmpty()) {
142 logger.error(CrudServiceMsgs.INVALID_OXM_DIR, rulesDir);
143 throw new FileNotFoundException("DbEdgeRules and edge_properties files were not found.");
146 // Sort and then group the files with their versions, convert them to the
147 // schema, and add them to versionContextMap
148 // 1. Sort the files. We need the DbEdgeRules files to be before the
149 // edgeProperties files.
150 // 2. Group the files with their versions. ie. v11 ->
151 // ["DbEdgeRule_v11.json", "edgeProperties_v11.json"].
152 // The "group method" returns a HashMap whose key is the version and the
153 // value is a list of objects.
154 // 3. Go through each version and map the files into one schema using the
155 // "jsonFilesLoader" method.
156 // Also update the "versionContextMap" with the version and it's schema.
157 rulesFiles.stream().sorted(Comparator.comparing(RelationshipSchemaLoader::filename))
158 .collect(Collectors.groupingBy(f -> myMatcher(versionPattern, filename(f))))
159 .forEach((version, resourceAndFile) -> {
160 if (resourceAndFile.size() == 2) {
161 versionContextMap.put(version, jsonFilesLoader(version, resourceAndFile));
163 String filenames = resourceAndFile.stream().map(f -> filename(f)).collect(Collectors.toList()).toString();
164 String errorMsg = "Expecting a rules and a edge_properties files for " + version + ". Found: "
166 logger.warn(CrudServiceMsgs.INVALID_OXM_FILE, errorMsg);
169 logger.info(CrudServiceMsgs.LOADED_OXM_FILE, "Relationship Schema and Properties files: "
170 + rulesFiles.stream().map(f -> filename(f)).collect(Collectors.toList()));
171 } catch (IOException e) {
172 logger.error(CrudServiceMsgs.INVALID_OXM_DIR, rulesDir);
173 throw new CrudException("DbEdgeRules or edge_properties files were not found.", new FileNotFoundException());
177 private static String filename(Object k) throws ClassCastException {
178 if (k instanceof UrlResource) {
179 return ((UrlResource) k).getFilename();
180 } else if (k instanceof File) {
181 return ((File) k).getName();
183 throw new ClassCastException();
187 private static RelationshipSchema jsonFilesLoader(String version, List<Object> files) {
188 List<String> fileContents = new ArrayList<>();
189 RelationshipSchema rsSchema = null;
190 if (files.size() == 2) {
191 for (Object file : files) {
192 fileContents.add(jsonToRelationSchema(version, file));
193 versions.add(Integer.parseInt(version.substring(1)));
197 rsSchema = new RelationshipSchema(fileContents);
198 } catch (CrudException | IOException e) {
200 logger.error(CrudServiceMsgs.INVALID_OXM_FILE,
201 files.stream().map(f -> filename(f)).collect(Collectors.toList()).toString(), e.getMessage());
208 private synchronized static void updateVersionContext(String version, RelationshipSchema rs) {
209 versionContextMap.put(version, rs);
212 private synchronized static String jsonToRelationSchema(String version, Object file) {
213 InputStream inputStream = null;
214 String content = null;
217 if (file instanceof UrlResource) {
218 inputStream = ((UrlResource) file).getInputStream();
220 inputStream = new FileInputStream((File) file);
221 addtimer(version, file);
223 content = IOUtils.toString(inputStream, "UTF-8");
224 } catch (IOException e) {
230 private static void addtimer(String version, Object file) {
231 TimerTask task = null;
232 task = new FileWatcher((File) file) {
233 protected void onChange(File file) {
234 // here we implement the onChange
235 logger.info(CrudServiceMsgs.OXM_FILE_CHANGED, file.getName());
238 // Cannot use the file object here because we also have to get the
239 // edge properties associated with that version.
240 // The properties are stored in a different file.
241 RelationshipSchemaLoader.loadModels(version);
242 } catch (Exception e) {
248 if (!timers.containsKey(version)) {
249 Timer timer = new Timer("db_edge_rules_" + version);
250 timer.schedule(task, new Date(), 10000);
251 timers.put(version, timer);
256 private static String myMatcher(Pattern p, String s) {
257 Matcher m = p.matcher(s);
258 return m.matches() ? m.group(1) : "";