1 .. This work is licensed under a Creative Commons Attribution 4.0 International License.
2 .. http://creativecommons.org/licenses/by/4.0
11 .. _config_binding_service_sdk:
13 cbs-client - a Config Binding Service client
14 --------------------------------------------
15 CbsClientFactory can be used to lookup for CBS in your application. Returned CbsClient can then be used to get a configuration, poll for configuration or poll for configuration changes.
17 The following CBS endpoints are supported by means of different CbsRequests:
18 - get-configuration created by CbsRequests.getConfiguration method - returns the service configuration
19 - get-by-key created by CbsRequests.getByKey method - returns componentName:key entry from Consul
20 - get-all created by CbsRequests.getAll method - returns everything which relates to the service (configuration, policies, etc.)
26 // Generate RequestID and InvocationID which will be used when logging and in HTTP requests
27 final RequestDiagnosticContext diagnosticContext = RequestDiagnosticContext.create();
28 final CbsRequest request = CbsRequests.getConfiguration(diagnosticContext);
30 // Read necessary properties from the environment
31 final CbsClientConfiguration config = CbsClientConfiguration.fromEnvironment();
33 // Create the client and use it to get the configuration
34 CbsClientFactory.createCbsClient(config)
35 .flatMap(cbsClient -> cbsClient.get(request))
38 // do a stuff with your JSON configuration using GSON API
39 final int port = Integer.parseInt(jsonObject.get("collector.listen_port").getAsString());
43 logger.warn("Ooops", throwable);
47 Note that a subscribe handler can/will be called in separate thread asynchronously after CBS address lookup succeeds and CBS service call returns a result.
49 If you are interested in calling CBS periodically and react only when the configuration changed you can use updates method:
53 // Generate RequestID and InvocationID which will be used when logging and in HTTP requests
54 final RequestDiagnosticContext diagnosticContext = RequestDiagnosticContext.create();
55 final CbsRequest request = CbsRequests.getConfiguration(diagnosticContext);
57 // Read necessary configuration from the environment
58 final CbsClientConfiguration config = CbsClientConfiguration.fromEnvironment();
61 final Duration initialDelay = Duration.ofSeconds(5);
62 final Duration period = Duration.ofMinutes(1);
64 // Create the client and use it to get the configuration
65 CbsClientFactory.createCbsClient(config)
66 .flatMapMany(cbsClient -> cbsClient.updates(request, initialDelay, period))
69 // do a stuff with your JSON configuration using GSON API
70 final int port = Integer.parseInt(jsonObject.get("collector.listen_port").getAsString());
74 logger.warn("Ooops", throwable);
77 The most significant change is in line 14. We are using flatMapMany since we want to map one CbsClient to many JsonObject updates. After 5 seconds CbsClient will call CBS every minute. If the configuration has changed it will pass the JsonObject downstream - in our case consumer of JsonObject will be called.
79 Parsing streams' definitions:
81 - CBS configuration response contains various service-specific entries. It also contains a standardized DCAE streams definitions as streams_publishes and streams_subscribes JSON objects. CBS Client API provides a way of parsing this part of configuration so you can use Java objects instead of low-level GSON API.
82 - Because streams definitions are a simple value objects we were not able to provide you a nice polymorphic API. Instead you have 2-level API at your disposal:
83 - You can extract raw streams by means of DataStreams.namedSinks (for streams_publishes) and DataStreams.namedSources (for streams_subscribes).
84 - Then you will be able to parse the specific entry from returned collection to a desired stream type by means of parsers built by StreamFromGsonParsers factory.
90 final CbsRequest request = CbsRequests.getConfiguration(RequestDiagnosticContext.create());
91 final StreamFromGsonParser<MessageRouterSink> mrSinkParser = StreamFromGsonParsers.messageRouterSinkParser();
93 CbsClientFactory.createCbsClient(CbsClientConfiguration.fromEnvironment())
94 .flatMapMany(cbsClient -> cbsClient.updates(request, Duration.ofSeconds(5), Duration.ofMinutes(1)))
95 .map(DataStreams::namedSinks)
96 .map(sinks -> sinks.filter(StreamPredicates.streamOfType(MESSAGE_ROUTER)).map(mrSinkParser::unsafeParse).toList())
98 mrSinks -> mrSinks.forEach(mrSink -> {
99 logger.info(mrSink.name()); // name = the configuration key
100 logger.info(mrSink.aafCredentials().username()); // = aaf_username
101 logger.info(mrSink.topicUrl());
104 throwable -> logger.warn("Ooops", throwable)
107 For details and sample usage please refer to JavaDoc and unit and integration tests. Especially `CbsClientImplIT <https://gerrit.onap.org/r/gitweb?p=dcaegen2/services/sdk.git;a=blob;f=rest-services/cbs-client/src/test/java/org/onap/dcaegen2/services/sdk/rest/services/cbs/client/impl/CbsClientImplIT.java;hb=HEAD>`_, `MessageRouterSinksIT <https://gerrit.onap.org/r/gitweb?p=dcaegen2/services/sdk.git;a=blob;f=rest-services/cbs-client/src/test/java/org/onap/dcaegen2/services/sdk/rest/services/cbs/client/api/streams/MessageRouterSinksIT.java;hb=HEAD>`_ and `MixedDmaapStreamsIT <https://gerrit.onap.org/r/gitweb?p=dcaegen2/services/sdk.git;a=blob;f=rest-services/cbs-client/src/test/java/org/onap/dcaegen2/services/sdk/rest/services/cbs/client/api/streams/MixedDmaapStreamsIT.java;hb=HEAD>`_ might be useful.
110 Results of these parsers (MessageRouterSink, MessageRouterSource) can be directly used to connect to DMaaP MR by means of dmaap-client API described below.
112 crypt-password - an utility for BCrypt passwords
113 ------------------------------------------------
114 Library to generate and match cryptography password using BCrypt algorithm
118 java -jar crypt-password-${sdk.version}.jar password_to_crypt
120 $2a$10$iDEKdKknakPqH5XZb6wEmeBP2SMRwwiWHy8RNioUTNycIomjIqCAO
122 Can be used like maven dependency to match generated password.
124 dmaap-client - a DMaaP MR client
125 --------------------------------
126 After parsing CBS sink definitions you will get a Source or Sink value object. It can be then directly used to communicate with DMaaP Message Router REST API.
128 Writing message publisher
132 final MessageRouterPublisher publisher = DmaapClientFactory.createMessageRouterPublisher();
133 final MessageRouterSink sinkDefinition; //... Sink definition obtained by parsing CBS response
134 final MessageRouterPublishRequest request = ImmutableMessageRouterPublishRequest.builder()
135 .sinkDefinition(sinkDefinition)
139 .map(JsonPrimitive::new)
140 .transform(input -> publisher.put(request, input))
142 if (resp.successful()) {
143 logger.debug("Sent a batch of messages to the MR");
145 logger.warn("Message sending has failed: {}", resp.failReason());
149 logger.warn("An unexpected error while sending messages to DMaaP", ex);
152 Note that we are using Reactor transform operator. As an alternative you could assign Flux of JSON values to the variable and then invoke publisher.put on it. The important performance-related thing to remember is that you should feed the put method with a stream of messages instead of multiple calls with single messages. This way the client API will be able to send them in batches which should significantly improve performance (at least on transfer level).
154 Writing message subscriber
158 final MessageRouterSource sourceDefinition; //... Source definition obtained by parsing CBS response
159 final MessageRouterSubscribeRequest request = ImmutableMessageRouterSubscribeRequest.builder()
160 .sourceDefinition(sourceDefinition)
163 cut.subscribeForElements(request, Duration.ofMinutes(1))
164 .map(JsonElement::getAsJsonObject)
169 logger.warn("An unexpected error while receiving messages from DMaaP", ex);
172 ******************************************
173 Configure timeout when talking to DMaaP-MR
174 ******************************************
180 final MessageRouterPublishRequest request = ImmutableMessageRouterPublishRequest.builder()
181 .timeoutConfig(ImmutableDmaapTimeoutConfig.builder()
182 .timeout(Duration.ofSeconds(2))
193 final MessageRouterSubscribeRequest request = ImmutableMessageRouterSubscribeRequest.builder()
194 .timeoutConfig(ImmutableDmaapTimeoutConfig.builder()
195 .timeout(Duration.ofSeconds(2))
202 The default timeout value (4 seconds) can be used:
206 ImmutableDmaapTimeoutConfig.builder().build()
208 For timeout exception following message is return as failReason in DmaapResponse:
213 {"requestError":{"serviceException":{"messageId":"SVC0001","text":"Client timeout exception occurred, Error code is %1","variables":["408"]}}}
215 *************************
216 Configure retry mechanism
217 *************************
223 final MessageRouterPublisherConfig config = ImmutableMessageRouterPublisherConfig.builder()
224 .retryConfig(ImmutableDmaapRetryConfig.builder()
225 .retryIntervalInSeconds(2)
232 final MessageRouterPublisher publisher = DmaapClientFactory.createMessageRouterPublisher(config);
238 final MessageRouterSubscriberConfig config = ImmutableMessageRouterSubscriberConfig.builder()
239 .retryConfig(ImmutableDmaapRetryConfig.builder()
240 .retryIntervalInSeconds(2)
247 final MessageRouterSubscriber subscriber = DmaapClientFactory.createMessageRouterSubscriber(config);
249 The default retry config (retryCount=3, retryIntervalInSeconds=1) can be used:
253 ImmutableDmaapRetryConfig.builder().build()
255 Retry functionality works for:
256 - DMaaP MR HTTP response status codes: 404, 408, 413, 429, 500, 502, 503, 504
257 - Java Exception classes: ReadTimeoutException, ConnectException
259 **************************************
260 Configure custom persistent connection
261 **************************************
267 final MessageRouterPublisherConfig connectionPoolConfiguration = ImmutableMessageRouterPublisherConfig.builder()
268 .connectionPoolConfig(ImmutableDmaapConnectionPoolConfig.builder()
270 .maxIdleTime(10) //in seconds
271 .maxLifeTime(20) //in seconds
274 final MessageRouterPublisher publisher = DmaapClientFactory.createMessageRouterPublisher(connectionPoolConfiguration);
280 final MessageRouterSubscriberConfig connectionPoolConfiguration = ImmutableMessageRouterSubscriberConfig.builder()
281 .connectionPoolConfig(ImmutableDmaapConnectionPoolConfig.builder()
283 .maxIdleTime(10) //in seconds
284 .maxLifeTime(20) //in seconds
287 final MessageRouterSubscriber subscriber = DmaapClientFactory.createMessageRouterSubscriber(connectionPoolConfiguration);
289 The default custom persistent connection configuration (connectionPool=16, maxLifeTime=2147483647, maxIdleTime=2147483647) can be used:
293 ImmutableDmaapConnectionPoolConfig.builder().build()
295 ***************************************
296 Configure request for authorized topics
297 ***************************************
303 final MessageRouterSink sink = ImmutableMessageRouterSink.builder()
304 .aafCredentials(ImmutableAafCredentials.builder()
305 .username("username")
306 .password("password").build())
312 final MessageRouterPublishRequest request = ImmutableMessageRouterPublishRequest.builder()
313 .sinkDefinition(sink)
323 final MessageRouterSource sourceDefinition = ImmutableMessageRouterSource.builder()
324 .aafCredentials(ImmutableAafCredentials.builder()
325 .username("username")
326 .password("password")
333 final MessageRouterSubscribeRequest request = ImmutableMessageRouterSubscribeRequest.builder()
334 .sourceDefinition(sourceDefinition)
340 AAF Credentials are optional for subscribe/publish requests.
341 Username and password are used for basic authentication header during sending HTTP request to dmaap-mr.
343 hvvesclient-producer - a reference Java implementation of High Volume VES Collector client
344 ------------------------------------------------------------------------------------------
345 This library is used in xNF simulator which helps us test HV VES Collector in CSIT tests. You may use it as a reference when implementing your code in non-JVM language or directly when using Java/Kotlin/etc.
351 final ProducerOptions producerOptions = ImmutableProducerOptions.builder()
352 .collectorAddresses(HashSet.of(
353 InetSocketAddress.createUnresolved("dcae-hv-ves-collector", 30222)))
355 final HvVesProducer hvVesProducer = HvVesProducerFactory.create(producerOptions);
357 Flux<VesEvent> events; // ...
358 Mono.from(hvVesProducer.send(events))
359 .doOnSuccess(() -> logger.info("All events has been sent"))
360 .doOnError(ex -> logger.warn("Failed to send one or more events", ex))
363 external-schema-manager - JSON Validator with schema mapping
364 ------------------------------------------------------------
365 This library can be used to validate any JSON content incoming as JsonNode. What differs it from other validation
366 libraries is mapping of externally located schemas to local schema files.
368 Validated JSON must have one field that will refer to an external schema, which will be mapped to local file and then
369 validation of any chosen part of JSON is executed using local schema.
371 Mapping file is cached on validator creation, so it's not read every time validation is performed.
372 Schemas' content couldn't be cached due to external library restrictions (OpenAPI4j).
379 "schemaReference": "https://forge.3gpp.org/rep/sa5/data-models/blob/REL-16/OpenAPI/faultMnS.yaml",
382 "exampleData: "SAMPLE_VALUE"
388 There are two methods, that are interface of this sub-project.
394 new StndDefinedValidator.ValidatorBuilder()
395 .mappingFilePath(mappingFilePath)
396 .schemasPath(schemasPath)
397 .schemaRefPath(schemaRefPath)
398 .stndDefinedDataPath(stndDefinedDataPath)
406 stndDefinedValidator.validate(event);
408 There are 4 string parameters of the builder:
410 .. csv-table:: **String parameters of the builder**
411 :header: "Name", "Description", "Example", "Note"
412 :widths: 10, 20, 20, 20
414 "mappingFilePath", "This should be a local filesystem path to file with mappings of public URLs to local URLs. Format of the schema mapping file is a JSON file with list of mappings", "etc/externalRepo/schema-map.json", " "
415 "schemasPath", "Schemas path is a directory under which external-schema-manager will search for local schemas", "./etc/externalRepo/ and first mapping from example mappingFile is taken, validator will look for schema under the path: ./etc/externalRepo/3gpp/rep/sa5/data-models/blob/REL-16/OpenAPI/faultMnS.yaml", " "
416 "schemaRefPath", "This is an internal path from validated JSON. It should define which field will be taken as public schema reference, which is later mapped", "/event/stndDefinedFields/schemaReference", "In SDK version 1.4.2 this path doesn't use JSON path notation (with . signs). It might change in further versions"
417 "stndDefinedDataPath", "This is path to stndDefined data in JSON. This fields will be validated during stndDefined validation.", "/event/stndDefinedFields/data", "In SDK version 1.4.2 this path doesn't use JSON path notation (with . signs). It might change in further versions."
420 Format of the schema mapping file is a JSON file with list of mappings, as shown in the example below.
426 "publicURL": "https://forge.3gpp.org/rep/sa5/data-models/blob/REL-16/OpenAPI/faultMnS.yaml",
427 "localURL": "3gpp/rep/sa5/data-models/blob/REL-16/OpenAPI/faultMnS.yaml"
430 "publicURL": "https://forge.3gpp.org/rep/sa5/data-models/blob/REL-16/OpenAPI/heartbeatNtf.yaml",
431 "localURL": "3gpp/rep/sa5/data-models/blob/REL-16/OpenAPI/heartbeatNtf.yaml"
434 "publicURL": "https://forge.3gpp.org/rep/sa5/data-models/blob/REL-16/OpenAPI/PerDataFileReportMnS.yaml",
435 "localURL": "3gpp/rep/sa5/data-models/blob/REL-16/OpenAPI/PerDataFileReportMnS.yaml"
438 "publicURL": "https://forge.3gpp.org/rep/sa5/data-models/blob/master/OpenAPI/provMnS.yaml",
439 "localURL": "3gpp/rep/sa5/data-models/blob/REL-16/OpenAPI/provMnS.yaml"
443 **Possible scenarios when using external-schema-manger:**
445 When the schema-map file, the schema and the sent event are correct, then the validation is successful and the log
446 shows "Validation of stndDefinedDomain has been successful".
448 Errors in the schema-map - none of the mappings are cached:
450 - When no schema-map file exists, "Unable to read mapping file. Mapping file path: {}" is logged.
451 - When a schema-map file exists, but has an incorrect format, a warning is logged: "Schema mapping file has incorrect format. Mapping file path: {}"
453 Errors in one of the mappings in schema-map - this mapping is not cached, a warning is logged "Mapping for publicURL ({}) will not be cached to validator.":
455 - When the local url in the schema-map file references a file that does not exist, the warning "Local schema resource missing. Schema file with path {} has not been found."
456 - When the schema file is empty, the information "Schema file is empty. Schema path: {}" is logged
457 - When a schema file has an incorrect format (not a yaml), the following information is logged: Schema has incorrect YAML structure. Schema path: {} "
459 Errors in schemaRefPath returns errors:
461 - If in the schemaRef path in the event we provide an url that refers to an existing schema, but the part after # refers to a non-existent part of it, then an error is thrown: IncorrectInternalFileReferenceException ("Schema reference refer to existing file, but internal reference (after #) is incorrect.") "
462 - When in the schemaRef path in the event, we provide a url that refers to a non-existent mapping from public to localURL, a NoLocalReferenceException is thrown, which logs to the console: "Couldn't find mapping for public url. PublicURL: {}"