src/main/java/com/att/dmf/mr/beans/DMaaPKafkaMetaBroker.java

   1 /*******************************************************************************
   2  *  ============LICENSE_START=======================================================
   3  *  org.onap.dmaap
   4  *  ================================================================================
   5  *  Copyright © 2017 AT&T Intellectual Property. All rights reserved.
   6  *  ================================================================================
   7  *  Licensed under the Apache License, Version 2.0 (the "License");
   8  *  you may not use this file except in compliance with the License.
   9  *  You may obtain a copy of the License at
  10  *        http://www.apache.org/licenses/LICENSE-2.0
  11 *
  12  *  Unless required by applicable law or agreed to in writing, software
  13  *  distributed under the License is distributed on an "AS IS" BASIS,
  14  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  *  See the License for the specific language governing permissions and
  16  *  limitations under the License.
  17  *  ============LICENSE_END=========================================================
  18  *
  19  *  ECOMP is a trademark and service mark of AT&T Intellectual Property.
  20  *
  21  *******************************************************************************/
  22 package com.att.dmf.mr.beans;
  23
  24 import java.util.Arrays;
  25 import java.util.LinkedList;
  26 import java.util.List;
  27 import java.util.Properties;
  28 import java.util.Set;
  29 import java.util.TreeSet;
  30 import java.util.concurrent.ExecutionException;
  31
  32 import org.I0Itec.zkclient.ZkClient;
  33 import org.I0Itec.zkclient.exception.ZkNoNodeException;
  34 import org.apache.kafka.clients.admin.AdminClient;
  35 import org.apache.kafka.clients.admin.AdminClientConfig;
  36 import org.apache.kafka.clients.admin.CreateTopicsResult;
  37 import org.apache.kafka.clients.admin.NewTopic;
  38 import org.apache.kafka.common.KafkaFuture;
  39 import org.json.JSONObject;
  40 import org.json.JSONArray;
  41 import org.springframework.beans.factory.annotation.Qualifier;
  42 import org.springframework.stereotype.Component;
  43
  44 import com.att.dmf.mr.CambriaApiException;
  45 import com.att.dmf.mr.constants.CambriaConstants;
  46 import com.att.dmf.mr.metabroker.Broker;
  47 import com.att.dmf.mr.metabroker.Broker1;
  48 import com.att.dmf.mr.metabroker.Topic;
  49 import com.att.dmf.mr.utils.ConfigurationReader;
  50 //import org.apache.log4-j.Logger;
  51 import com.att.eelf.configuration.EELFLogger;
  52 import com.att.eelf.configuration.EELFManager;
  53
  54 import com.att.nsa.configs.ConfigDb;
  55 import com.att.nsa.configs.ConfigDbException;
  56 import com.att.nsa.configs.ConfigPath;
  57 import com.att.nsa.drumlin.service.standards.HttpStatusCodes;
  58 import com.att.nsa.drumlin.till.nv.rrNvReadable;
  59 import com.att.nsa.security.NsaAcl;
  60 import com.att.nsa.security.NsaAclUtils;
  61 import com.att.nsa.security.NsaApiKey;
  62
  63
  64 /**
  65  * class performing all topic operations
  66  *
  67  * @author anowarul.islam
  68  *
  69  */
  70 //@Component
  71 public class DMaaPKafkaMetaBroker implements Broker1 {
  72
  73         public DMaaPKafkaMetaBroker() {
  74                 fZk = null;
  75                 fCambriaConfig = null;
  76                 fBaseTopicData = null;
  77                 final Properties props = new Properties ();
  78                 String fkafkaBrokers = com.att.ajsc.filemonitor.AJSCPropertiesMap.getProperty(CambriaConstants.msgRtr_prop,
  79                                 "kafka.metadata.broker.list");
  80                 if (null == fkafkaBrokers) {
  81
  82                         fkafkaBrokers = "localhost:9092";
  83                 }
  84
  85              props.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, fkafkaBrokers );
  86              props.put("sasl.jaas.config", "org.apache.kafka.common.security.plain.PlainLoginModule required username='admin' password='admin_secret';");
  87                  props.put(AdminClientConfig.SECURITY_PROTOCOL_CONFIG, "SASL_PLAINTEXT");
  88              props.put("sasl.mechanism", "PLAIN");
  89
  90              fKafkaAdminClient=AdminClient.create ( props );
  91
  92         }
  93
  94         //private static final Logger log = Logger.getLogger(DMaaPKafkaMetaBroker.class);
  95         private static final EELFLogger log = EELFManager.getInstance().getLogger(ConfigurationReader.class);
  96         private final AdminClient fKafkaAdminClient;
  97
  98
  99
 100         /**
 101          * DMaaPKafkaMetaBroker constructor initializing
 102          *
 103          * @param settings
 104          * @param zk
 105          * @param configDb
 106          */
 107         public DMaaPKafkaMetaBroker(@Qualifier("propertyReader") rrNvReadable settings,
 108                         @Qualifier("dMaaPZkClient") ZkClient zk, @Qualifier("dMaaPZkConfigDb") ConfigDb configDb) {
 109                 //fSettings = settings;
 110                 fZk = zk;
 111                 fCambriaConfig = configDb;
 112                 fBaseTopicData = configDb.parse("/topics");
 113                 final Properties props = new Properties ();
 114                 String fkafkaBrokers = com.att.ajsc.filemonitor.AJSCPropertiesMap.getProperty(CambriaConstants.msgRtr_prop,
 115                                 "kafka.metadata.broker.list");
 116                 if (null == fkafkaBrokers) {
 117
 118                         fkafkaBrokers = "localhost:9092";
 119                 }
 120
 121
 122                  props.put("sasl.jaas.config", "org.apache.kafka.common.security.plain.PlainLoginModule required username='admin' password='admin_secret';");
 123                  props.put(AdminClientConfig.SECURITY_PROTOCOL_CONFIG, "SASL_PLAINTEXT");
 124              props.put("sasl.mechanism", "PLAIN");
 125              props.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, fkafkaBrokers );
 126
 127              fKafkaAdminClient=AdminClient.create ( props );
 128
 129
 130
 131         }
 132
 133         public DMaaPKafkaMetaBroker( rrNvReadable settings,
 134                         ZkClient zk,  ConfigDb configDb,AdminClient client) {
 135
 136                 fZk = zk;
 137                 fCambriaConfig = configDb;
 138                 fBaseTopicData = configDb.parse("/topics");
 139             fKafkaAdminClient= client;
 140
 141
 142
 143         }
 144
 145         @Override
 146         public List<Topic> getAllTopics() throws ConfigDbException {
 147                 log.info("Retrieving list of all the topics.");
 148                 final LinkedList<Topic> result = new LinkedList<Topic>();
 149                 try {
 150                         log.info("Retrieving all topics from root: " + zkTopicsRoot);
 151                         final List<String> topics = fZk.getChildren(zkTopicsRoot);
 152                         for (String topic : topics) {
 153                                 result.add(new KafkaTopic(topic, fCambriaConfig, fBaseTopicData));
 154                         }
 155                         JSONObject dataObj = new JSONObject();
 156                         dataObj.put("topics", new JSONObject());
 157
 158                         for (String topic : topics) {
 159                                 dataObj.getJSONObject("topics").put(topic, new JSONObject());
 160                         }
 161                 } catch (ZkNoNodeException excp) {
 162                         // very fresh kafka doesn't have any topics or a topics node
 163                         log.error("ZK doesn't have a Kakfa topics node at " + zkTopicsRoot, excp);
 164                 }
 165                 return result;
 166         }
 167
 168         @Override
 169         public Topic getTopic(String topic) throws ConfigDbException {
 170                 if (fZk.exists(zkTopicsRoot + "/" + topic)) {
 171                         return getKafkaTopicConfig(fCambriaConfig, fBaseTopicData, topic);
 172                 }
 173                 // else: no such topic in kafka
 174                 return null;
 175         }
 176
 177         /**
 178          * static method get KafkaTopic object
 179          *
 180          * @param db
 181          * @param base
 182          * @param topic
 183          * @return
 184          * @throws ConfigDbException
 185          */
 186         public static KafkaTopic getKafkaTopicConfig(ConfigDb db, ConfigPath base, String topic) throws ConfigDbException {
 187                 return new KafkaTopic(topic, db, base);
 188         }
 189
 190         /**
 191          * creating topic
 192          */
 193         @Override
 194         public Topic createTopic(String topic, String desc, String ownerApiKey, int partitions, int replicas,
 195                         boolean transactionEnabled) throws TopicExistsException, CambriaApiException,ConfigDbException {
 196                 log.info("Creating topic: " + topic);
 197                 try {
 198                         log.info("Check if topic [" + topic + "] exist.");
 199                         // first check for existence "our way"
 200                         final Topic t = getTopic(topic);
 201                         if (t != null) {
 202                                 log.info("Could not create topic [" + topic + "]. Topic Already exists.");
 203                                 throw new TopicExistsException("Could not create topic [" + topic + "]. Topic Alreay exists.");
 204                         }
 205                 } catch (ConfigDbException e1) {
 206                         log.error("Topic [" + topic + "] could not be created. Couldn't check topic data in config db.", e1);
 207                         throw new CambriaApiException(HttpStatusCodes.k503_serviceUnavailable,
 208                                         "Couldn't check topic data in config db.");
 209                 }
 210
 211                 // we only allow 3 replicas. (If we don't test this, we get weird
 212                 // results from the cluster,
 213                 // so explicit test and fail.)
 214                 if (replicas < 1 || replicas > 3) {
 215                         log.info("Topic [" + topic + "] could not be created. The replica count must be between 1 and 3.");
 216                         throw new CambriaApiException(HttpStatusCodes.k400_badRequest,
 217                                         "The replica count must be between 1 and 3.");
 218                 }
 219                 if (partitions < 1) {
 220                         log.info("Topic [" + topic + "] could not be created. The partition count must be at least 1.");
 221                         throw new CambriaApiException(HttpStatusCodes.k400_badRequest, "The partition count must be at least 1.");
 222                 }
 223
 224                 // create via kafka
 225
 226                         try
 227                         {
 228                                 final NewTopic topicRequest = new NewTopic ( topic, partitions, new Integer(replicas).shortValue () );
 229                                 final CreateTopicsResult ctr = fKafkaAdminClient.createTopics ( Arrays.asList ( topicRequest ) );
 230                                 final KafkaFuture<Void> ctrResult = ctr.all ();
 231                                 ctrResult.get ();
 232                                 // underlying Kafka topic created. now setup our API info
 233                                 return createTopicEntry ( topic, desc, ownerApiKey, transactionEnabled );
 234                         }
 235                         catch ( InterruptedException e )
 236                         {
 237
 238                                 log.warn ( "Execution of describeTopics timed out." );
 239                                 throw new ConfigDbException ( e );
 240                         }
 241                         catch ( ExecutionException e )
 242                         {
 243
 244                                 log.warn ( "Execution of describeTopics failed: " + e.getCause ().getMessage (), e.getCause () );
 245                                 throw new ConfigDbException ( e.getCause () );
 246                         }
 247
 248         }
 249
 250         @Override
 251         public void deleteTopic(String topic) throws CambriaApiException, TopicExistsException,ConfigDbException {
 252                 log.info("Deleting topic: " + topic);
 253                 ZkClient zkClient = null;
 254                 try {
 255                         log.info("Loading zookeeper client for topic deletion.");
 256                                         // topic creation. (Otherwise, the topic is only partially created
 257                         // in ZK.)
 258
 259
 260                         fKafkaAdminClient.deleteTopics(Arrays.asList(topic));
 261                         log.info("Zookeeper client loaded successfully. Deleting topic.");
 262
 263                 } catch (Exception e) {
 264                         log.error("Failed to delete topic [" + topic + "]. " + e.getMessage(), e);
 265                         throw new ConfigDbException(e);
 266                 }  finally {
 267                         log.info("Closing zookeeper connection.");
 268                         if (zkClient != null)
 269                                 zkClient.close();
 270                 }
 271
 272                 // throw new UnsupportedOperationException ( "We can't programmatically
 273                 // delete Kafka topics yet." );
 274         }
 275
 276         //private final rrNvReadable fSettings;
 277         private final ZkClient fZk;
 278         private final ConfigDb fCambriaConfig;
 279         private final ConfigPath fBaseTopicData;
 280
 281         private static final String zkTopicsRoot = "/brokers/topics";
 282         private static final JSONObject kEmptyAcl = new JSONObject();
 283
 284         /**
 285          * method Providing KafkaTopic Object associated with owner and
 286          * transactionenabled or not
 287          *
 288          * @param name
 289          * @param desc
 290          * @param owner
 291          * @param transactionEnabled
 292          * @return
 293          * @throws ConfigDbException
 294          */
 295         public KafkaTopic createTopicEntry(String name, String desc, String owner, boolean transactionEnabled)
 296                         throws ConfigDbException {
 297                 return createTopicEntry(fCambriaConfig, fBaseTopicData, name, desc, owner, transactionEnabled);
 298         }
 299
 300         /**
 301          * static method giving kafka topic object
 302          *
 303          * @param db
 304          * @param basePath
 305          * @param name
 306          * @param desc
 307          * @param owner
 308          * @param transactionEnabled
 309          * @return
 310          * @throws ConfigDbException
 311          */
 312         public static KafkaTopic createTopicEntry(ConfigDb db, ConfigPath basePath, String name, String desc, String owner,
 313                         boolean transactionEnabled) throws ConfigDbException {
 314                 final JSONObject o = new JSONObject();
 315                 o.put("owner", owner);
 316                 o.put("description", desc);
 317                 o.put("txenabled", transactionEnabled);
 318                 db.store(basePath.getChild(name), o.toString());
 319                 return new KafkaTopic(name, db, basePath);
 320         }
 321
 322         /**
 323          * class performing all user opearation like user is eligible to read,
 324          * write. permitting a user to write and read,
 325          *
 326          * @author anowarul.islam
 327          *
 328          */
 329         public static class KafkaTopic implements Topic {
 330                 /**
 331                  * constructor initializes
 332                  *
 333                  * @param name
 334                  * @param configdb
 335                  * @param baseTopic
 336                  * @throws ConfigDbException
 337                  */
 338                 public KafkaTopic(String name, ConfigDb configdb, ConfigPath baseTopic) throws ConfigDbException {
 339                         fName = name;
 340                         fConfigDb = configdb;
 341                         fBaseTopicData = baseTopic;
 342
 343                         String data = fConfigDb.load(fBaseTopicData.getChild(fName));
 344                         if (data == null) {
 345                                 data = "{}";
 346                         }
 347
 348                         final JSONObject o = new JSONObject(data);
 349                         fOwner = o.optString("owner", "");
 350                         fDesc = o.optString("description", "");
 351                         fTransactionEnabled = o.optBoolean("txenabled", false);// default
 352                                                                                                                                         // value is
 353                                                                                                                                         // false
 354                         // if this topic has an owner, it needs both read/write ACLs. If there's no
 355                                                 // owner (or it's empty), null is okay -- this is for existing or implicitly
 356                                                 // created topics.
 357                                                 JSONObject readers = o.optJSONObject ( "readers" );
 358                                                 if ( readers == null && fOwner.length () > 0 ) readers = kEmptyAcl;
 359                                                 fReaders =  fromJson ( readers );
 360
 361                                                 JSONObject writers = o.optJSONObject ( "writers" );
 362                                                 if ( writers == null && fOwner.length () > 0 ) writers = kEmptyAcl;
 363                                                 fWriters = fromJson ( writers );
 364                 }
 365
 366                 private NsaAcl fromJson(JSONObject o) {
 367                         NsaAcl acl = new NsaAcl();
 368                         if (o != null) {
 369                                 JSONArray a = o.optJSONArray("allowed");
 370                                 if (a != null) {
 371                                         for (int i = 0; i < a.length(); ++i) {
 372                                                 String user = a.getString(i);
 373                                                 acl.add(user);
 374                                         }
 375                                 }
 376                         }
 377                         return acl;
 378                 }
 379
 380                 @Override
 381                 public String getName() {
 382                         return fName;
 383                 }
 384
 385                 @Override
 386                 public String getOwner() {
 387                         return fOwner;
 388                 }
 389
 390                 @Override
 391                 public String getDescription() {
 392                         return fDesc;
 393                 }
 394
 395                 @Override
 396                 public NsaAcl getReaderAcl() {
 397                         return fReaders;
 398                 }
 399
 400                 @Override
 401                 public NsaAcl getWriterAcl() {
 402                         return fWriters;
 403                 }
 404
 405                 @Override
 406                 public void checkUserRead(NsaApiKey user) throws AccessDeniedException  {
 407                         NsaAclUtils.checkUserAccess ( fOwner, getReaderAcl(), user );
 408                 }
 409
 410                 @Override
 411                 public void checkUserWrite(NsaApiKey user) throws AccessDeniedException  {
 412                         NsaAclUtils.checkUserAccess ( fOwner, getWriterAcl(), user );
 413                 }
 414
 415                 @Override
 416                 public void permitWritesFromUser(String pubId, NsaApiKey asUser)
 417                                 throws ConfigDbException, AccessDeniedException {
 418                         updateAcl(asUser, false, true, pubId);
 419                 }
 420
 421                 @Override
 422                 public void denyWritesFromUser(String pubId, NsaApiKey asUser) throws ConfigDbException, AccessDeniedException {
 423                         updateAcl(asUser, false, false, pubId);
 424                 }
 425
 426                 @Override
 427                 public void permitReadsByUser(String consumerId, NsaApiKey asUser)
 428                                 throws ConfigDbException, AccessDeniedException {
 429                         updateAcl(asUser, true, true, consumerId);
 430                 }
 431
 432                 @Override
 433                 public void denyReadsByUser(String consumerId, NsaApiKey asUser)
 434                                 throws ConfigDbException, AccessDeniedException {
 435                         updateAcl(asUser, true, false, consumerId);
 436                 }
 437
 438                 private void updateAcl(NsaApiKey asUser, boolean reader, boolean add, String key)
 439                                 throws ConfigDbException, AccessDeniedException{
 440                         try
 441                         {
 442                                 final NsaAcl acl = NsaAclUtils.updateAcl ( this, asUser, key, reader, add );
 443
 444                                 // we have to assume we have current data, or load it again. for the expected use
 445                                 // case, assuming we can overwrite the data is fine.
 446                                 final JSONObject o = new JSONObject ();
 447                                 o.put ( "owner", fOwner );
 448                                 o.put ( "readers", safeSerialize ( reader ? acl : fReaders ) );
 449                                 o.put ( "writers", safeSerialize ( reader ? fWriters : acl ) );
 450                                 fConfigDb.store ( fBaseTopicData.getChild ( fName ), o.toString () );
 451
 452                                 log.info ( "ACL_UPDATE: " + asUser.getKey () + " " + ( add ? "added" : "removed" ) + ( reader?"subscriber":"publisher" ) + " " + key + " on " + fName );
 453
 454                         }
 455                         catch ( ConfigDbException x )
 456                         {
 457                                 throw x;
 458                         }
 459                         catch ( AccessDeniedException x )
 460                         {
 461                                 throw x;
 462                         }
 463
 464                 }
 465
 466                 private JSONObject safeSerialize(NsaAcl acl) {
 467                         return acl == null ? null : acl.serialize();
 468                 }
 469
 470                 private final String fName;
 471                 private final ConfigDb fConfigDb;
 472                 private final ConfigPath fBaseTopicData;
 473                 private final String fOwner;
 474                 private final String fDesc;
 475                 private final NsaAcl fReaders;
 476                 private final NsaAcl fWriters;
 477                 private boolean fTransactionEnabled;
 478
 479                 public boolean isTransactionEnabled() {
 480                         return fTransactionEnabled;
 481                 }
 482
 483                 @Override
 484                 public Set<String> getOwners() {
 485                         final TreeSet<String> owners = new TreeSet<String> ();
 486                         owners.add ( fOwner );
 487                         return owners;
 488                 }
 489         }
 490
 491 }