MongoDB for Java Developers The Ultimate Spring Data MongoDB Starter Kit Christoph Strobl, R&D Engineer, Broadcom Copyright © 2005-2024 Broadcom, Inc. or its affiliates.

DON‘T PANIC Douglas Adams, The Hitchhiker's Guide to the Galaxy

No content

No content

MongoClient

Spring Data MongoDB

Spring Data MongoDB JPA JDBC Neo4j R2DBC ArangoDB Couchbase Cosmos DB yugabyteDB Elasticsearch Apache Cassandra ….

Spring Data offers Familiar & Consistent Programming Model That Respects Store Specific Traits no silver bullet no magic not one API to rule them all

Default Implementation Repository Interface List findByFirstName(String name) Repository Anatomy

Entity Manager Template API Mapping Conversion Resource & Transaction
 Management native store format <> domain type eg. enum -> string Default Implementation Repository Interface List findByFirstName(String name) Repository Anatomy

Entity Manager Template API Mapping Conversion Resource & Transaction
 Management native store format <> domain type eg. enum -> string Default Implementation Repository Interface List findByFirstName(String name) Repository Anatomy

Entity Manager Database Driver Template API Mapping Conversion Resource & Transaction
 Management native store format <> domain type eg. enum -> string Default Implementation Repository Interface List findByFirstName(String name) Repository Anatomy

Entity Manager Database Driver Template API Mapping Conversion Resource & Transaction
 Management native store format <> domain type eg. enum -> string Default Implementation Repository Interface List findByFirstName(String name) MongoClient Repository Anatomy

interface Repo extends . . . { Repository Composition

interface Repo extends . . . { Repository CrudRepository findAll(); findById(...) count(); save(...); delete(...); ... PagingAndSorting Repository findAll(Page); findAll(Sort); Repository Composition

interface Repo extends . . . { Repository CrudRepository findAll(); findById(...) count(); save(...); delete(...); ... PagingAndSorting Repository findAll(Page); findAll(Sort); Proxy Default Implementation Store Specific Repository Composition

interface Repo extends . . . { Repository CrudRepository findAll(); findById(...) count(); save(...); delete(...); ... PagingAndSorting Repository findAll(Page); findAll(Sort); Proxy Default Implementation Store Specific List f i ndAll(); long count(); Predefined methods List f i ndByFirstName(String name); Derived Finder Method Repository Composition

Derived Queries 18 List f i ndByFirstName(String name)

Derived Queries 19 List f i ndByFirstName(String name) Return Type

Derived Queries 20 List f i ndByFirstName(String name) Return Type Operation Keyword

Derived Queries 21 List f i ndByFirstName(String name) Return Type Operation Keyword Match Against

Derived Queries 22 List f i ndByFirstName(String name) Return Type Operation Keyword Match Against Bind Argument

Break It Down 23 List f i ndEmployeeByFirstNameLikeOrderByAgeAsc(String name)

Break It Down 24 List f i ndEmployeeByFirstNameLikeOrderByAgeAsc(String name) Employee Page Slice Stream Window

Break It Down 25 List f i ndEmployeeByFirstNameLikeOrderByAgeAsc(String name) read get query search stream Placeholder For Anything You Like Delimiter Employee Page Slice Stream Window

Break It Down 26 List f i ndEmployeeByFirstNameLikeOrderByAgeAsc(String name) read get query search stream Placeholder For Anything You Like matches contains lessThan startsWith greaterThan isEmpty isNull isNotNull before after ... Match Operator Delimiter Employee Page Slice Stream Window

Break It Down 27 List f i ndEmployeeByFirstNameLikeOrderByAgeAsc(String name) read get query search stream Placeholder For Anything You Like matches contains lessThan startsWith greaterThan isEmpty isNull isNotNull before after ... Match Operator Sort Direction Delimiter Employee Page Slice Stream Window

Template APIs class MongoTemplate implements MongoOperations { List f i nd(Query query, Class entityClass) List f i ndAndRemove(Query query, Class entityClass) T execute(Class> entityClass, CollectionCallback callback) query(where(“firstName”).is(...)) template.execute(Employee.class, collection - > { return collection.f i nd(new Document("f i rstname", " .. . ")) .into(new ArrayList()); }); Access to native driver commands MongoDB

class Employee { Long id; String f i rstName; String lastName; } class Manager { Long id; String name; List employees } { _id : 1000, name : Marvin, employees : [ { id : 1, f i rstName : Ford, lastName : Prefect } , … ] } Basic Mapping MongoDB db.manager

@Document("managers") @Sharded(shardKey = { "country" }) class Manager { @Id Long id; String country; @Indexed @Field("full_name") String name; @Version Long version; @CreatedDate Instant created; @EncryptedField(altKeyName="secret",…) String ssn; @DBRef List employees; @DocumentReference Supervisor supervisor; { _id : 1000, country : space full_name : Marvin, version: 2, created: 1725879207729, ssn: *****, employees : [ { $ref : employee, $id : … }, … ], supervisor: 42 } db.managers Mapping MongoDB Advanced

Would it save you a lot of time if I just gave up and went mad now? Douglas Adams, The Hitchhiker's Guide to the Galaxy

Specific Features MongoDB @Hint("lastname - idx") List f i ndByLastname(String lastname);

Specific Features MongoDB @Hint("lastname - idx") List f i ndByLastname(String lastname); @Query(value="{ 'f i rst_name' : ?0 }", f i elds="{ 'f i rst_name' : 1, 'last_name' : 1}") List f i ndByFirstname(String f i rstname);

Specific Features MongoDB @Hint("lastname - idx") List f i ndByLastname(String lastname); @Query(value="{ 'f i rst_name' : ?0 }", f i elds="{ 'f i rst_name' : 1, 'last_name' : 1}") List f i ndByFirstname(String f i rstname); @ReadPreference("secondaryPreferred") List f i ndByFirstname(String f i rstname);

Specific Features MongoDB @Hint("lastname - idx") List f i ndByLastname(String lastname); @Query(value="{ 'f i rst_name' : ?0 }", f i elds="{ 'f i rst_name' : 1, 'last_name' : 1}") List f i ndByFirstname(String f i rstname); @ReadPreference("secondaryPreferred") List f i ndByFirstname(String f i rstname); List f i ndByLocationNear(Point location, Distance distance); GeoResults f i ndByLocationNear(Point location, Distance distance);

Specific Features MongoDB @Hint("lastname - idx") List f i ndByLastname(String lastname); @Query(value="{ 'f i rst_name' : ?0 }", f i elds="{ 'f i rst_name' : 1, 'last_name' : 1}") List f i ndByFirstname(String f i rstname); @ReadPreference("secondaryPreferred") List f i ndByFirstname(String f i rstname); List f i ndByLocationNear(Point location, Distance distance); GeoResults f i ndByLocationNear(Point location, Distance distance); @Update("{ '$inc' : { 'visits' : 1 } }") long f i ndAndIncrementVisitsByLastname(String lastname);

Specific Features MongoDB @Hint("lastname - idx") List f i ndByLastname(String lastname); @Query(value="{ 'f i rst_name' : ?0 }", f i elds="{ 'f i rst_name' : 1, 'last_name' : 1}") List f i ndByFirstname(String f i rstname); @ReadPreference("secondaryPreferred") List f i ndByFirstname(String f i rstname); List f i ndByLocationNear(Point location, Distance distance); GeoResults f i ndByLocationNear(Point location, Distance distance); @Update("{ '$inc' : { 'visits' : 1 } }") long f i ndAndIncrementVisitsByLastname(String lastname); List deleteByLastname(String lastname);

I‘d far rather be happy than right any day. Douglas Adams, The Hitchhiker's Guide to the Galaxy

Extension API interface AtlasRepository { List vectorSearch(String index, String path, List vector, Limit limit); } 1. Define it

Extension API interface AtlasRepository { List vectorSearch(String index, String path, List vector, Limit limit); } class AtlasRepositoryImpl implements AtlasRepository, RepositoryMetadataAccess { @Autowired MongoOperations mongoOperations; @Override public List vectorSearch(String index, String path, List vector, Limit limit) { RepositoryMethodContext metadata = RepositoryMethodContext.currentMethod(); Class> domainType = metadata.getRepository().getDomainType(); Document $vectorSearch = …; Aggregation aggregation = newAggregation(ctx - > $vectorSearch); return mongoOperations.aggregate(aggregation, domainType).getMappedResults(); } } 1. Define it 2. Implement it

Extension API interface AtlasRepository { List vectorSearch(String index, String path, List vector, Limit limit); } class AtlasRepositoryImpl implements AtlasRepository, RepositoryMetadataAccess { @Autowired MongoOperations mongoOperations; @Override public List vectorSearch(String index, String path, List vector, Limit limit) { RepositoryMethodContext metadata = RepositoryMethodContext.currentMethod(); Class> domainType = metadata.getRepository().getDomainType(); Document $vectorSearch = …; Aggregation aggregation = newAggregation(ctx - > $vectorSearch); return mongoOperations.aggregate(aggregation, domainType).getMappedResults(); } } interface MovieRepository extends CrudRepository, AtlasRepository { } 1. Define it 2. Implement it 2. Use it

No content

start.spring.io Thank you!