001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License. You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018 package org.apache.oozie.client.rest;
019
020 import org.apache.oozie.client.BundleJob;
021 import org.apache.oozie.client.CoordinatorAction;
022 import org.apache.oozie.client.CoordinatorJob;
023 import org.apache.oozie.client.WorkflowAction;
024 import org.apache.oozie.client.WorkflowJob;
025 import org.json.simple.JSONArray;
026 import org.json.simple.JSONObject;
027
028 import java.lang.reflect.InvocationHandler;
029 import java.lang.reflect.Method;
030 import java.lang.reflect.Proxy;
031 import java.util.ArrayList;
032 import java.util.Date;
033 import java.util.HashMap;
034 import java.util.List;
035 import java.util.Map;
036
037 /**
038 * JSON to bean converter for {@link WorkflowAction}, {@link WorkflowJob}, {@link CoordinatorAction}
039 * and {@link CoordinatorJob}.
040 * <p/>
041 * It uses JDK dynamic proxy to create bean instances.
042 */
043 public class JsonToBean {
044
045 private static class Property {
046 String label;
047 Class type;
048 boolean isList;
049
050 public Property(String label, Class type) {
051 this(label, type, false);
052 }
053
054 public Property(String label, Class type, boolean isList) {
055 this.label = label;
056 this.type = type;
057 this.isList = isList;
058 }
059 }
060
061 private static final Map<String, Property> WF_JOB = new HashMap<String, Property>();
062 private static final Map<String, Property> WF_ACTION = new HashMap<String, Property>();
063 private static final Map<String, Property> COORD_JOB = new HashMap<String, Property>();
064 private static final Map<String, Property> COORD_ACTION = new HashMap<String, Property>();
065 private static final Map<String, Property> BUNDLE_JOB = new HashMap<String, Property>();
066
067 static {
068 WF_ACTION.put("getId", new Property(JsonTags.WORKFLOW_ACTION_ID, String.class));
069 WF_ACTION.put("getName", new Property(JsonTags.WORKFLOW_ACTION_NAME, String.class));
070 WF_ACTION.put("getType", new Property(JsonTags.WORKFLOW_ACTION_TYPE, String.class));
071 WF_ACTION.put("getConf", new Property(JsonTags.WORKFLOW_ACTION_CONF, String.class));
072 WF_ACTION.put("getStatus", new Property(JsonTags.WORKFLOW_ACTION_STATUS, WorkflowAction.Status.class));
073 WF_ACTION.put("getRetries", new Property(JsonTags.WORKFLOW_ACTION_RETRIES, Integer.TYPE));
074 WF_ACTION.put("getStartTime", new Property(JsonTags.WORKFLOW_ACTION_START_TIME, Date.class));
075 WF_ACTION.put("getEndTime", new Property(JsonTags.WORKFLOW_ACTION_END_TIME, Date.class));
076 WF_ACTION.put("getTransition", new Property(JsonTags.WORKFLOW_ACTION_TRANSITION, String.class));
077 WF_ACTION.put("getData", new Property(JsonTags.WORKFLOW_ACTION_DATA, String.class));
078 WF_ACTION.put("getExternalId", new Property(JsonTags.WORKFLOW_ACTION_EXTERNAL_ID, String.class));
079 WF_ACTION.put("getExternalStatus", new Property(JsonTags.WORKFLOW_ACTION_EXTERNAL_STATUS, String.class));
080 WF_ACTION.put("getTrackerUri", new Property(JsonTags.WORKFLOW_ACTION_TRACKER_URI, String.class));
081 WF_ACTION.put("getConsoleUrl", new Property(JsonTags.WORKFLOW_ACTION_CONSOLE_URL, String.class));
082 WF_ACTION.put("getErrorCode", new Property(JsonTags.WORKFLOW_ACTION_ERROR_CODE, String.class));
083 WF_ACTION.put("getErrorMessage", new Property(JsonTags.WORKFLOW_ACTION_ERROR_MESSAGE, String.class));
084 WF_ACTION.put("toString", new Property(JsonTags.TO_STRING, String.class));
085
086 WF_JOB.put("getAppPath", new Property(JsonTags.WORKFLOW_APP_PATH, String.class));
087 WF_JOB.put("getAppName", new Property(JsonTags.WORKFLOW_APP_NAME, String.class));
088 WF_JOB.put("getId", new Property(JsonTags.WORKFLOW_ID, String.class));
089 WF_JOB.put("getConf", new Property(JsonTags.WORKFLOW_CONF, String.class));
090 WF_JOB.put("getStatus", new Property(JsonTags.WORKFLOW_STATUS, WorkflowJob.Status.class));
091 WF_JOB.put("getLastModifiedTime", new Property(JsonTags.WORKFLOW_LAST_MOD_TIME, Date.class));
092 WF_JOB.put("getCreatedTime", new Property(JsonTags.WORKFLOW_CREATED_TIME, Date.class));
093 WF_JOB.put("getStartTime", new Property(JsonTags.WORKFLOW_CREATED_TIME, Date.class));
094 WF_JOB.put("getEndTime", new Property(JsonTags.WORKFLOW_END_TIME, Date.class));
095 WF_JOB.put("getUser", new Property(JsonTags.WORKFLOW_USER, String.class));
096 WF_JOB.put("getGroup", new Property(JsonTags.WORKFLOW_GROUP, String.class));
097 WF_JOB.put("getRun", new Property(JsonTags.WORKFLOW_RUN, Integer.TYPE));
098 WF_JOB.put("getConsoleUrl", new Property(JsonTags.WORKFLOW_CONSOLE_URL, String.class));
099 WF_JOB.put("getActions", new Property(JsonTags.WORKFLOW_ACTIONS, WorkflowAction.class, true));
100 WF_JOB.put("getParentId", new Property(JsonTags.WORKFLOW_PARENT_ID, String.class));
101 WF_JOB.put("toString", new Property(JsonTags.TO_STRING, String.class));
102
103 COORD_ACTION.put("getId", new Property(JsonTags.COORDINATOR_ACTION_ID, String.class));
104 COORD_ACTION.put("getJobId", new Property(JsonTags.COORDINATOR_JOB_ID, String.class));
105 COORD_ACTION.put("getActionNumber", new Property(JsonTags.COORDINATOR_ACTION_NUMBER, Integer.TYPE));
106 COORD_ACTION.put("getCreatedConf", new Property(JsonTags.COORDINATOR_ACTION_CREATED_CONF, String.class));
107 COORD_ACTION.put("getCreatedTime", new Property(JsonTags.COORDINATOR_ACTION_CREATED_TIME, Date.class));
108 COORD_ACTION.put("getNominalTime", new Property(JsonTags.COORDINATOR_ACTION_NOMINAL_TIME, Date.class));
109 COORD_ACTION.put("getExternalId", new Property(JsonTags.COORDINATOR_ACTION_EXTERNALID, String.class));
110 COORD_ACTION.put("getStatus", new Property(JsonTags.COORDINATOR_ACTION_STATUS, CoordinatorAction.Status.class));
111 COORD_ACTION.put("getRunConf", new Property(JsonTags.COORDINATOR_ACTION_RUNTIME_CONF, String.class));
112 COORD_ACTION
113 .put("getLastModifiedTime", new Property(JsonTags.COORDINATOR_ACTION_LAST_MODIFIED_TIME, Date.class));
114 COORD_ACTION
115 .put("getMissingDependencies", new Property(JsonTags.COORDINATOR_ACTION_MISSING_DEPS, String.class));
116 COORD_ACTION.put("getExternalStatus", new Property(JsonTags.COORDINATOR_ACTION_EXTERNAL_STATUS, String.class));
117 COORD_ACTION.put("getTrackerUri", new Property(JsonTags.COORDINATOR_ACTION_TRACKER_URI, String.class));
118 COORD_ACTION.put("getConsoleUrl", new Property(JsonTags.COORDINATOR_ACTION_CONSOLE_URL, String.class));
119 COORD_ACTION.put("getErrorCode", new Property(JsonTags.COORDINATOR_ACTION_ERROR_CODE, String.class));
120 COORD_ACTION.put("getErrorMessage", new Property(JsonTags.COORDINATOR_ACTION_ERROR_MESSAGE, String.class));
121 COORD_ACTION.put("toString", new Property(JsonTags.TO_STRING, String.class));
122
123 COORD_JOB.put("getAppPath", new Property(JsonTags.COORDINATOR_JOB_PATH, String.class));
124 COORD_JOB.put("getAppName", new Property(JsonTags.COORDINATOR_JOB_NAME, String.class));
125 COORD_JOB.put("getId", new Property(JsonTags.COORDINATOR_JOB_ID, String.class));
126 COORD_JOB.put("getConf", new Property(JsonTags.COORDINATOR_JOB_CONF, String.class));
127 COORD_JOB.put("getStatus", new Property(JsonTags.COORDINATOR_JOB_STATUS, CoordinatorJob.Status.class));
128 COORD_JOB.put("getExecutionOrder",
129 new Property(JsonTags.COORDINATOR_JOB_EXECUTIONPOLICY, CoordinatorJob.Execution.class));
130 COORD_JOB.put("getFrequency", new Property(JsonTags.COORDINATOR_JOB_FREQUENCY, Integer.TYPE));
131 COORD_JOB.put("getTimeUnit", new Property(JsonTags.COORDINATOR_JOB_TIMEUNIT, CoordinatorJob.Timeunit.class));
132 COORD_JOB.put("getTimeZone", new Property(JsonTags.COORDINATOR_JOB_TIMEZONE, String.class));
133 COORD_JOB.put("getConcurrency", new Property(JsonTags.COORDINATOR_JOB_CONCURRENCY, Integer.TYPE));
134 COORD_JOB.put("getTimeout", new Property(JsonTags.COORDINATOR_JOB_TIMEOUT, Integer.TYPE));
135 COORD_JOB.put("getLastActionTime", new Property(JsonTags.COORDINATOR_JOB_LAST_ACTION_TIME, Date.class));
136 COORD_JOB.put("getNextMaterializedTime",
137 new Property(JsonTags.COORDINATOR_JOB_NEXT_MATERIALIZED_TIME, Date.class));
138 COORD_JOB.put("getStartTime", new Property(JsonTags.COORDINATOR_JOB_START_TIME, Date.class));
139 COORD_JOB.put("getEndTime", new Property(JsonTags.COORDINATOR_JOB_END_TIME, Date.class));
140 COORD_JOB.put("getUser", new Property(JsonTags.COORDINATOR_JOB_USER, String.class));
141 COORD_JOB.put("getGroup", new Property(JsonTags.COORDINATOR_JOB_GROUP, String.class));
142 COORD_JOB.put("getConsoleUrl", new Property(JsonTags.COORDINATOR_JOB_CONSOLE_URL, String.class));
143 COORD_JOB.put("getActions", new Property(JsonTags.COORDINATOR_ACTIONS, CoordinatorAction.class, true));
144 COORD_JOB.put("toString", new Property(JsonTags.TO_STRING, String.class));
145
146 BUNDLE_JOB.put("getActions", new Property(JsonTags.COORDINATOR_ACTIONS, CoordinatorAction.class, true));
147
148 BUNDLE_JOB.put("getAppPath",new Property(JsonTags.BUNDLE_JOB_PATH, String.class));
149 BUNDLE_JOB.put("getAppName",new Property(JsonTags.BUNDLE_JOB_NAME, String.class));
150 BUNDLE_JOB.put("getId",new Property(JsonTags.BUNDLE_JOB_ID, String.class));
151 BUNDLE_JOB.put("getExternalId",new Property(JsonTags.BUNDLE_JOB_EXTERNAL_ID, String.class));
152 BUNDLE_JOB.put("getConf",new Property(JsonTags.BUNDLE_JOB_CONF, String.class));
153 BUNDLE_JOB.put("getStatus",new Property(JsonTags.BUNDLE_JOB_STATUS, BundleJob.Status.class));
154 BUNDLE_JOB.put("getTimeUnit",new Property(JsonTags.BUNDLE_JOB_TIMEUNIT, BundleJob.Timeunit.class));
155 BUNDLE_JOB.put("getTimeout",new Property(JsonTags.BUNDLE_JOB_TIMEOUT, Integer.TYPE));
156 BUNDLE_JOB.put("getKickoffTime",new Property(JsonTags.BUNDLE_JOB_KICKOFF_TIME, Date.class));
157 BUNDLE_JOB.put("getStartTime",new Property(JsonTags.BUNDLE_JOB_START_TIME, Date.class));
158 BUNDLE_JOB.put("getEndTime",new Property(JsonTags.BUNDLE_JOB_END_TIME, Date.class));
159 BUNDLE_JOB.put("getPauseTime",new Property(JsonTags.BUNDLE_JOB_PAUSE_TIME, Date.class));
160 BUNDLE_JOB.put("getCreatedTime",new Property(JsonTags.BUNDLE_JOB_CREATED_TIME, Date.class));
161 BUNDLE_JOB.put("getUser",new Property(JsonTags.BUNDLE_JOB_USER, String.class));
162 BUNDLE_JOB.put("getGroup",new Property(JsonTags.BUNDLE_JOB_GROUP, String.class));
163 BUNDLE_JOB.put("getConsoleUrl",new Property(JsonTags.BUNDLE_JOB_CONSOLE_URL, String.class));
164 BUNDLE_JOB.put("getCoordinators",new Property(JsonTags.BUNDLE_COORDINATOR_JOBS, CoordinatorJob.class, true));
165 BUNDLE_JOB.put("toString", new Property(JsonTags.TO_STRING, String.class));
166 }
167
168 /**
169 * The dynamic proxy invocation handler used to convert JSON values to bean properties using a mapping.
170 */
171 private static class JsonInvocationHandler implements InvocationHandler {
172 private final Map<String, Property> mapping;
173 private final JSONObject json;
174
175 /**
176 * Invocation handler constructor.
177 *
178 * @param mapping property to JSON/type-info mapping.
179 * @param json the json object to back the property values.
180 */
181 public JsonInvocationHandler(Map<String, Property> mapping, JSONObject json) {
182 this.mapping = mapping;
183 this.json = json;
184 }
185
186 @Override
187 public Object invoke(Object o, Method method, Object[] objects) throws Throwable {
188 Property prop = mapping.get(method.getName());
189 if (prop == null) {
190 throw new RuntimeException("Undefined method mapping: " + method.getName());
191 }
192 if (prop.isList) {
193 if (prop.type == WorkflowAction.class) {
194 return createWorkflowActionList((JSONArray) json.get(prop.label));
195 }
196 else if (prop.type == CoordinatorAction.class) {
197 return createCoordinatorActionList((JSONArray) json.get(prop.label));
198 }
199 else if (prop.type == CoordinatorJob.class) {
200 return createCoordinatorJobList((JSONArray) json.get(prop.label));
201 }
202 else {
203 throw new RuntimeException("Unsupported list type : " + prop.type.getSimpleName());
204 }
205 }
206 else {
207 return parseType(prop.type, json.get(prop.label));
208 }
209 }
210
211 @SuppressWarnings("unchecked")
212 private Object parseType(Class type, Object obj) {
213 if (type == String.class) {
214 return obj;
215 }
216 else if (type == Integer.TYPE) {
217 return (obj != null) ? new Integer(((Long) obj).intValue()) : new Integer(0);
218 }
219 else if (type == Long.TYPE) {
220 return (obj != null) ? obj : new Long(0);
221 }
222 else if (type == Date.class) {
223 return JsonUtils.parseDateRfc822((String) obj);
224 }
225 else if (type.isEnum()) {
226 return Enum.valueOf(type, (String) obj);
227 }
228 else if (type == WorkflowAction.class) {
229 return createWorkflowAction((JSONObject) obj);
230 }
231 else {
232 throw new RuntimeException("Unsupported type : " + type.getSimpleName());
233 }
234 }
235 }
236
237 /**
238 * Creates a workflow action bean from a JSON object.
239 *
240 * @param json json object.
241 * @return a workflow action bean populated with the JSON object values.
242 */
243 public static WorkflowAction createWorkflowAction(JSONObject json) {
244 return (WorkflowAction) Proxy.newProxyInstance(JsonToBean.class.getClassLoader(),
245 new Class[]{WorkflowAction.class},
246 new JsonInvocationHandler(WF_ACTION, json));
247 }
248
249 /**
250 * Creates a list of workflow action beans from a JSON array.
251 *
252 * @param json json array.
253 * @return a list of workflow action beans from a JSON array.
254 */
255 public static List<WorkflowAction> createWorkflowActionList(JSONArray json) {
256 List<WorkflowAction> list = new ArrayList<WorkflowAction>();
257 for (Object obj : json) {
258 list.add(createWorkflowAction((JSONObject) obj));
259 }
260 return list;
261 }
262
263 /**
264 * Creates a workflow job bean from a JSON object.
265 *
266 * @param json json object.
267 * @return a workflow job bean populated with the JSON object values.
268 */
269 public static WorkflowJob createWorkflowJob(JSONObject json) {
270 return (WorkflowJob) Proxy.newProxyInstance(JsonToBean.class.getClassLoader(),
271 new Class[]{WorkflowJob.class},
272 new JsonInvocationHandler(WF_JOB, json));
273 }
274
275 /**
276 * Creates a list of workflow job beans from a JSON array.
277 *
278 * @param json json array.
279 * @return a list of workflow job beans from a JSON array.
280 */
281 public static List<WorkflowJob> createWorkflowJobList(JSONArray json) {
282 List<WorkflowJob> list = new ArrayList<WorkflowJob>();
283 for (Object obj : json) {
284 list.add(createWorkflowJob((JSONObject) obj));
285 }
286 return list;
287 }
288
289 /**
290 * Creates a coordinator action bean from a JSON object.
291 *
292 * @param json json object.
293 * @return a coordinator action bean populated with the JSON object values.
294 */
295 public static CoordinatorAction createCoordinatorAction(JSONObject json) {
296 return (CoordinatorAction) Proxy.newProxyInstance(JsonToBean.class.getClassLoader(),
297 new Class[]{CoordinatorAction.class},
298 new JsonInvocationHandler(COORD_ACTION, json));
299 }
300
301 /**
302 * Creates a list of coordinator action beans from a JSON array.
303 *
304 * @param json json array.
305 * @return a list of coordinator action beans from a JSON array.
306 */
307 public static List<CoordinatorAction> createCoordinatorActionList(JSONArray json) {
308 List<CoordinatorAction> list = new ArrayList<CoordinatorAction>();
309 for (Object obj : json) {
310 list.add(createCoordinatorAction((JSONObject) obj));
311 }
312 return list;
313 }
314
315 /**
316 * Creates a coordinator job bean from a JSON object.
317 *
318 * @param json json object.
319 * @return a coordinator job bean populated with the JSON object values.
320 */
321 public static CoordinatorJob createCoordinatorJob(JSONObject json) {
322 return (CoordinatorJob) Proxy.newProxyInstance(JsonToBean.class.getClassLoader(),
323 new Class[]{CoordinatorJob.class},
324 new JsonInvocationHandler(COORD_JOB, json));
325 }
326
327 /**
328 * Creates a list of coordinator job beans from a JSON array.
329 *
330 * @param json json array.
331 * @return a list of coordinator job beans from a JSON array.
332 */
333 public static List<CoordinatorJob> createCoordinatorJobList(JSONArray json) {
334 List<CoordinatorJob> list = new ArrayList<CoordinatorJob>();
335 for (Object obj : json) {
336 list.add(createCoordinatorJob((JSONObject) obj));
337 }
338 return list;
339 }
340
341 /**
342 * Creates a bundle job bean from a JSON object.
343 *
344 * @param json json object.
345 * @return a bundle job bean populated with the JSON object values.
346 */
347 public static BundleJob createBundleJob(JSONObject json) {
348 return (BundleJob) Proxy.newProxyInstance(JsonToBean.class.getClassLoader(),
349 new Class[]{BundleJob.class},
350 new JsonInvocationHandler(BUNDLE_JOB, json));
351 }
352
353 /**
354 * Creates a list of bundle job beans from a JSON array.
355 *
356 * @param json json array.
357 * @return a list of bundle job beans from a JSON array.
358 */
359 public static List<BundleJob> createBundleJobList(JSONArray json) {
360 List<BundleJob> list = new ArrayList<BundleJob>();
361 for (Object obj : json) {
362 list.add(createBundleJob((JSONObject) obj));
363 }
364 return list;
365 }
366 }