September, 2020 What’s new in Spring Data MongoDB Copyright © 2020 VMware, Inc. or its affiliates.

Before We Start Staying focused is hard :) ☕ Documentation Samples ...

Cover w/ Image Agenda ● Newman Release (May 2020) ● 2020.0 (expected end Oct 2020) codename Ockham org.springframework.data spring-data-releasetrain Neumann-SR3 CUR org.springframework.data spring-data-bom 2020.0.0-M2 PRE org.springframework.data spring-data-mongodb 3.1.0-M2 PRE

Spring Data MongoDB 3.0 (Neumann) Major version upgrade with some breaking changes ● Driver upgrades to 4.0 ● Indexing Updates ● Updates via Aggregation pipeline ● Reactive GridFS changes ● Convenience org.springframework.data spring-data-mongodb 3.0.3 CUR

org.mongodb mongodb-driver-reactivestreams 1.12.0 3.0 – Driver Upgrades Dependency Changes org.mongodb mongo-java-driver 3.11.2 2.x mongo-java-driver sync mongo-java-driver ...-driver-reactivestreams reactive

org.mongodb mongodb-driver-reactivestreams 4.0.5 org.mongodb mongodb-driver-reactivestreams 1.12.0 3.0 – Driver Upgrades Dependency Changes org.mongodb mongo-java-driver 3.11.2 org.mongodb mongodb-driver-sync 4.0.5 org.mongodb mongodb-driver-core 4.0.5 mongo-java-driver mongo-java-driver ...-driver-reactivestreams 2.x 3.0 sync reactive mongodb-driver-core mongodb-driver-sync sync mongodb-driver-reactivestreams mongodb-driver-core reactive

3.0 – Driver Upgrades Configuration Changes – What it was like in 2.x AbstractMongoConfiguration (2.x) @Configuration class Cfg extends AbstractMongoConfiguration { @Override protected String getDatabaseName() { return "database"; } @Override public com.mongodb.MongoClient mongoClient() { return new com.mongodb.MongoClient(); } }

3.0 – Driver Upgrades Configuration Changes – Driver Type AbstractMongoClientConfiguration (3.x) @Configuration class Cfg extends AbstractMongoConfiguration { @Override protected String getDatabaseName() { return "database"; } @Override public com.mongodb.MongoClient mongoClient() { return new com.mongodb.MongoClient(); } } @Configuration class Cfg extends AbstractMongoClientConfiguration { @Override protected String getDatabaseName() { return "database"; } @Override public com.mongodb.client.MongoClient mongoClient() { return MongoClients.create(); } } AbstractMongoConfiguration (2.x)

@Configuration class Cfg extends AbstractMongoConfiguration { @Override protected String getDatabaseName() { return "database"; } @Override public com.mongodb.MongoClient mongoClient() { return new com.mongodb.MongoClient(); } } AbstractMongoConfiguration (2.x) 3.0 – Driver Upgrades Configuration Changes – Client Creation AbstractMongoClientConfiguration (3.x) @Configuration class Cfg extends AbstractMongoClientConfiguration { @Override protected String getDatabaseName() { return "database"; } }

3.0 – Driver Upgrades Configuration Changes – Driver Settings AbstractMongoClientConfiguration (3.x) @Configuration class Cfg extends AbstractMongoConfiguration { @Override protected String getDatabaseName() { return "database"; } @Override public com.mongodb.MongoClient mongoClient() { MongoClientURI uri = new MongoClientURI("!!... return new MongoClient(uri)); } } @Configuration class Cfg extends AbstractMongoClientConfiguration { @Override protected String getDatabaseName() { return "database"; } @Override protected void configureClientSettings(Builder builder) { builder.applyConnectionString(new ConnectionString("... builder.uuidRepresentation(UuidRepresentation.STANDARD); } } AbstractMongoConfiguration (2.x)

AbstractMongoClientConfiguration (3.x) @Configuration class Cfg extends AbstractMongoClientConfiguration { @Override protected String getDatabaseName() { return "database"; } @Override protected void configureClientSettings(Builder builder) { builder.applyConnectionString(new ConnectionString("!!...")); builder.uuidRepresentation(UuidRepresentation.STANDARD); } @Override protected boolean autoIndexCreation() { return true; } } 3.0 – Driver Upgrades Configuration Changes - Indexing AbstractMongoConfiguration (2.x) @Document public class Person { @Id private String id; @Indexed(unique = true) private Integer ssn; private String firstName; @Indexed private String lastName; private Integer age; } {…} spring.data.mongodb.auto-index-creation

3.0 – Update via Aggregation Pipeline {…} { "_id" : 1, "student" : "Maya", "homework" : [ 10, 5, 10 ], "quiz" : [ 10, 8 ], "extraCredit" : 0 } totalHomework : { $sum : $homework } totalQuiz : { $sum : $quiz } totalScore : { $add : [ "$totalHomework", "$totalQuiz", "$extraCredit“ ]} Expressive, Conditional Updates $addFields $set $unset $replaceWith $replaceRoot $project

3.0 – Update via Aggregation Pipeline {…} { "_id" : 1, "student" : "Maya", "homework" : [ 10, 5, 10 ], "quiz" : [ 10, 8 ], "extraCredit" : 0 } totalHomework : { $sum : $homework } totalQuiz : { $sum : $quiz } totalScore : { $add : [ "$totalHomework", "$totalQuiz", "$extraCredit“ ]} public void calculateTotalScore() { AggregationUpdate update = AggregationUpdate.update() .set(SetOperation.builder() .set("totalHomework").toValueOf(valueOf("homework").sum()) .and() .set("totalQuiz").toValueOf(valueOf("quiz").sum()) .and() .set("totalScore").toValueOf( valueOf("totalHomework") .add("totalQuiz") .add("extraCredit "))); mongoOperations.update(Student.class) .apply(update) .all(); } Expressive, Conditional Updates

3.0 – Reactive GridFS AsyncInputStream source = AsyncStreamHelper.toAsyncInputStream(resource.getInputStream()); gridFSops.store(source, “springone", "binary/octet-stream", metadata); 2.x

3.0 – Reactive GridFS Flux source = ... gridFSops.store(source, “springone", "binary/octet-stream", metadata); public class ReactiveGridFsResource { public Mono getGridFSFile() { !!... } } public Flux getContent() { ... // via GridFSDownloadPublisher } ReactiveGridFsResource s1p = gridFSops.getResources("s1p"); 3.0

3.0 – Convenience ...somtimes it’s the small things query(where("name")...) .withHint( new Document("att1", 1).append("att2", 1) ) @Sharded public class Person { private @Id String id; private String firstname; } Shard Support template.query(Person.class) .matching(where("firstname").is("luke")) .one() Narrow API query(where("name")!!...).withHint("index-name") Index Hints (via name) template.query(Person.class) .matching(query(where("firstname").is("luke"))) .one()

Spring Data MongoDB 3.1 (2020.0) Closing gaps to the imperative implementation. ● Reactive SpEL in @Query annotations ● Reactive Auditing ● Repository Metrics ● GraalVM Native Image experience ● Read Only Transactions codename: Ockham The following section is intended to outline the general direction of VMware's offerings. It is intended for information purposes only and may not be incorporated into any contract. Any information regarding pre-release of VMware offerings, future updates or other planned modifications is subject to ongoing evaluation by VMware and is subject to change. This information is provided without warranty or any kind, express or implied, and is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions regarding VMware's offerings. These purchasing decisions should only be based on features currently available. The development, release, and timing of any features or functionality described for VMware's offerings in this presentation remain at the sole discretion of VMware. VMware has no obligation to update forward looking information in this presentation. org.springframework.data spring-data-mongodb 3.1.0-M2 PRE

@Query("{ 'supervisor' : ?#{ hasRole('ROLE_ADMIN') ? new Document('$regex', '*') : principal.name } }") Flux findAllFilteredByRole(); 3.1 – Reactive SpEL now truly reactive via ReactiveEvaluationContextExtension Flux all = repo.findAllFilteredByRole(); all.subscribe(); 2.x ⚡ 3.1

3.1 – Reactive Auditing @CreatedBy, @CreatedDate, @LastMod... @Configuration @EnableReactiveMongoAuditing static class AuditingConfig extends AbstractReactiveMongoConfiguration { @Override protected String getDatabaseName() { return "database"; } @Bean public ReactiveAuditorAware auditorProvider() { return () -> ReactiveSecurityContextHolder.getContext() .map(it -> ...); } }

repo.save(fiona).subscribe(); 3.1 – Repository Metrics Execution Time Measurement PersonRepository.save(Object): 2 ms – SUCCESS Flux all = repo.findAll(); repo.save(frank).subscribe(); all.subscribe(); interface PersonRepository extends ReactiveCrudRepository { Flux findByName(String name); @Query("{ 'name' : { '$set' : 'Gallagher' } }") Flux findError(); } PersonRepository.save(Object): 2 ms - SUCCESS PersonRepository.findAll(): 32 ms – SUCCESS repo.findByName("fiona").subscribe(); repo.findError().subscribe(); PersonRespository.findByName(String): 1 ms - SUCCESS PersonRepository.findError(): 20 ms - ERROR

3.1 – Repository Metrics Setup via Invocation Listeners @Bean public RepositoryMetricsPostProcessor repositoryMetricsPostProcessor() { return new RepositoryMetricsPostProcessor(); } static class RepositoryMetricsPostProcessor implements BeanPostProcessor { public Object postProcessBeforeInitialization(Object bean, String beanName) ... if (bean instanceof RepositoryFactoryBeanSupport) { RepositoryFactoryBeanSupport, ?, ?> repositoryFactoryBean = (...) bean; repositoryFactoryBean .addRepositoryFactoryCustomizer(repositoryFactory -> { repositoryFactory.addInvocationListener(System.out::println); }); } return bean; } }

3.1 – GraalVM Native Image ...with spring-graalvm-native SpringDataComponentProcessor org.springframework.experimental spring-graalvm-native 0.7.1 SpringDataMongoDBTypeHints @Query @Aggregation @Document @Indexed @DBRef Nested Types Infrastructure Components ... extends CrudRepository Signature Types Methods Custom Implementations

3.1 – GraalVM Native Image ...with spring-graalvm-native

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Questions? org.springframework.data spring-data-mongodb 3.0.3 org.springframework.experimental spring-graalvm-native 0.7.1 CUR org.springframework.data spring-data-mongodb 3.1.0-M2 PRE PRE