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.HashSet;
33 import java.util.List;
36 import java.util.SortedSet;
37 import java.util.Timer;
38 import java.util.TimerTask;
39 import java.util.TreeSet;
40 import java.util.concurrent.ConcurrentHashMap;
41 import java.util.regex.Matcher;
42 import java.util.regex.Pattern;
43 import java.util.stream.Collectors;
44 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.Resource;
52 import org.springframework.core.io.UrlResource;
53 import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
54 import org.springframework.core.io.support.ResourcePatternResolver;
56 public class RelationshipSchemaLoader {
58 private static Map<String, RelationshipSchema> versionContextMap = new ConcurrentHashMap<>();
59 private static SortedSet<Integer> versions = new TreeSet<Integer>();
60 private static Map<String, Timer> timers = new ConcurrentHashMap<String, Timer>();
61 final static String edgePropsFiles = "edge_properties_";
62 final static String fileExt = ".json";
63 final static Pattern rulesFilePattern = Pattern.compile("DbEdgeRules(.*)" + fileExt);
64 final static Pattern propsFilePattern = Pattern.compile(edgePropsFiles + "(.*)" + fileExt);
65 final static Pattern versionPattern = Pattern.compile(".*(v\\d+)" + fileExt);
67 private static org.onap.aai.cl.api.Logger logger = LoggerFactory.getInstance()
68 .getLogger(RelationshipSchemaLoader.class.getName());
70 public synchronized static void loadModels() throws CrudException {
71 load(rulesFilePattern, propsFilePattern);
74 public synchronized static void loadModels(String version) throws CrudException {
75 String pattern = String.format("DbEdgeRules.*(%s)" + fileExt, version);
76 load(Pattern.compile(pattern), Pattern.compile(edgePropsFiles + version + fileExt));
79 public static RelationshipSchema getSchemaForVersion(String version) throws CrudException {
80 if (versionContextMap == null || versionContextMap.isEmpty()) {
82 } else if (!versionContextMap.containsKey(version)) {
85 } catch (Exception e) {
86 throw new CrudException("", Status.NOT_FOUND);
89 RelationshipSchema schema = versionContextMap.get(version);
91 throw new CrudException("", Status.NOT_FOUND);
96 public static String getLatestSchemaVersion() throws CrudException {
97 return "v" + versions.last();
100 public static Map<String, RelationshipSchema> getVersionContextMap() {
101 return versionContextMap;
104 public static void setVersionContextMap(Map<String, RelationshipSchema> versionContextMap) {
105 RelationshipSchemaLoader.versionContextMap = versionContextMap;
108 public static void resetVersionContextMap() {
109 RelationshipSchemaLoader.versionContextMap = new ConcurrentHashMap<>();
112 private static void load(Pattern rulesPattern, Pattern edgePropsPattern) throws CrudException {
113 ClassLoader cl = RelationshipSchemaLoader.class.getClassLoader();
114 ResourcePatternResolver rulesResolver = new PathMatchingResourcePatternResolver(cl);
115 List<Object> rulesFiles = new ArrayList<Object>();
116 Set<String> existingFiles = new HashSet<String>();
117 String rulesDir = CrudServiceConstants.CRD_HOME_MODEL;
120 // Allow additional DBEdgeRule files to be dropped in manually (in addition to those found on the classpath)
121 File[] edgeRuleFileList = new File(rulesDir).listFiles((d, name) -> rulesPattern.matcher(name).matches());
122 for (File file : edgeRuleFileList) {
123 rulesFiles.add(file);
124 existingFiles.add(filename(file));
127 // Get DBEdgeRules from the jar on the classpath. Don't include any that conflict with files which
128 // were dropped manually.
129 Resource[] rawResourceList = rulesResolver.getResources("classpath*:/dbedgerules/DbEdgeRules*" + fileExt);
130 List<Resource> prunedResourceList = new ArrayList<Resource>();
131 for (Resource resource : rawResourceList) {
132 if (!existingFiles.contains(filename(resource))) {
133 prunedResourceList.add(resource);
137 rulesFiles.addAll(Arrays.stream(prunedResourceList.toArray(new Resource[prunedResourceList.size()]))
138 .filter(r -> !myMatcher(rulesPattern, r.getFilename()).isEmpty()).collect(Collectors.toList()));
140 // This gets all the objects of type "File" from external directory (not
142 // 1. From an external directory (one not on the classpath) we get all the
143 // objects of type "File"
144 // 2. We only return the files whose names matched the supplied pattern
146 // 3. We then collect all the objects in a list and add the contents of
148 // to the previous collection (rulesFiles)
150 .addAll(Arrays.stream(new File(rulesDir).listFiles( (d, name) -> edgePropsPattern.matcher(name).matches() ))
151 .collect(Collectors.toList()));
153 if (rulesFiles.isEmpty()) {
154 logger.error(CrudServiceMsgs.INVALID_OXM_DIR, rulesDir);
155 throw new FileNotFoundException("DbEdgeRules and edge_properties files were not found.");
158 // Sort and then group the files with their versions, convert them to the
159 // schema, and add them to versionContextMap
160 // 1. Sort the files. We need the DbEdgeRules files to be before the
161 // edgeProperties files.
162 // 2. Group the files with their versions. ie. v11 ->
163 // ["DbEdgeRule_v11.json", "edgeProperties_v11.json"].
164 // The "group method" returns a HashMap whose key is the version and the
165 // value is a list of objects.
166 // 3. Go through each version and map the files into one schema using the
167 // "jsonFilesLoader" method.
168 // Also update the "versionContextMap" with the version and it's schema.
169 rulesFiles.stream().sorted(Comparator.comparing(RelationshipSchemaLoader::filename))
170 .collect(Collectors.groupingBy(f -> myMatcher(versionPattern, filename(f))))
171 .forEach((version, resourceAndFile) -> {
172 if (resourceAndFile.size() == 2) {
173 versionContextMap.put(version, jsonFilesLoader(version, resourceAndFile));
175 String filenames = resourceAndFile.stream().map(f -> filename(f)).collect(Collectors.toList()).toString();
176 String errorMsg = "Expecting a rules and a edge_properties files for " + version + ". Found: "
178 logger.warn(CrudServiceMsgs.INVALID_OXM_FILE, errorMsg);
181 logger.info(CrudServiceMsgs.LOADED_OXM_FILE, "Relationship Schema and Properties files: "
182 + rulesFiles.stream().map(f -> filename(f)).collect(Collectors.toList()));
183 } catch (IOException e) {
184 logger.error(CrudServiceMsgs.INVALID_OXM_DIR, rulesDir);
185 throw new CrudException("DbEdgeRules or edge_properties files were not found.", new FileNotFoundException());
189 private static String filename(Object k) throws ClassCastException {
190 if (k instanceof UrlResource) {
191 return ((UrlResource) k).getFilename();
192 } else if (k instanceof File) {
193 return ((File) k).getName();
195 throw new ClassCastException();
199 private static RelationshipSchema jsonFilesLoader(String version, List<Object> files) {
200 List<String> fileContents = new ArrayList<>();
201 RelationshipSchema rsSchema = null;
202 if (files.size() == 2) {
203 for (Object file : files) {
204 fileContents.add(jsonToRelationSchema(version, file));
205 versions.add(Integer.parseInt(version.substring(1)));
209 rsSchema = new RelationshipSchema(fileContents);
210 } catch (CrudException | IOException e) {
212 logger.error(CrudServiceMsgs.INVALID_OXM_FILE,
213 files.stream().map(f -> filename(f)).collect(Collectors.toList()).toString(), e.getMessage());
220 private synchronized static void updateVersionContext(String version, RelationshipSchema rs) {
221 versionContextMap.put(version, rs);
224 private synchronized static String jsonToRelationSchema(String version, Object file) {
225 InputStream inputStream = null;
226 String content = null;
229 if (file instanceof UrlResource) {
230 inputStream = ((UrlResource) file).getInputStream();
232 inputStream = new FileInputStream((File) file);
233 addtimer(version, file);
235 content = IOUtils.toString(inputStream, "UTF-8");
236 } catch (IOException e) {
242 private static void addtimer(String version, Object file) {
243 TimerTask task = null;
244 task = new FileWatcher((File) file) {
245 protected void onChange(File file) {
246 // here we implement the onChange
247 logger.info(CrudServiceMsgs.OXM_FILE_CHANGED, file.getName());
250 // Cannot use the file object here because we also have to get the
251 // edge properties associated with that version.
252 // The properties are stored in a different file.
253 RelationshipSchemaLoader.loadModels(version);
254 } catch (Exception e) {
260 if (!timers.containsKey(version)) {
261 Timer timer = new Timer("db_edge_rules_" + version);
262 timer.schedule(task, new Date(), 10000);
263 timers.put(version, timer);
268 private static String myMatcher(Pattern p, String s) {
269 Matcher m = p.matcher(s);
270 return m.matches() ? m.group(1) : "";