MongoDB + Java + Spring Data
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This document provides an overview of MongoDB, Java, and Spring Data. It discusses how MongoDB is a document-oriented NoSQL database that uses JSON-like documents with dynamic schemas. It describes how the Java driver can be used to interact with MongoDB to perform CRUD operations. It also explains how Spring Data provides an abstraction layer over the Java driver and allows for object mapping and repository-based queries to MongoDB.
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MongoDB Java Spring Data
Spring Data MongoDB: Repositories
Supported keywords for query methods:
Keyword Logical result
GreaterThan {"age" : {"$gt" : age}}
LessThan {"age" : {"$lt" : age}}
Between {"age" : {"$gt" : from, "$lt" : to}}
IsNotNull, NotNull {"age" : {"$ne" : null}}
IsNull, Null {"age" : null}
Like {"age" : age} ( age as regex)
(No keyword) {"age" : name}
Not {"age" : {"$ne" : name}}
Near {"location" : {"$near" : [x,y]}}
Within {"location" : {"$within" : {"$center" : [ [x, y], distance]}}}
Within {"location" : {"$within" : {"$box" : [ [x1, y1], x2, y2]}}}](https://image.slidesharecdn.com/sulzhenkomongodb-130408234446-phpapp02/85/MongoDB-Java-Spring-Data-22-320.jpg)
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MongoDB + Java + Spring Data
- 1. MongoDB + JAVA + Spring data Anton Sulzhenko Java Software Engineer [email protected]
- 2. MongoDB + Java + Spring Data MongoDB Java Spring Data
- 3. 3 MongoDB Java Spring Data What is NoSQL? • Non-relational data • Schemaless • No JOINs, No complex transactions • Horizontal scalability
- 4. 4 MongoDB Java Spring Data • Key-value(Redis, MemcaheDB) • Wide column(BigTable, Cassandra, HBase) • Document(MongoDB, CouchDB, Riak) • Graph(Neo4j, FlockDB)
- 5. 5 MongoDB Java Spring Data
- 7. 7 MongoDB Java Spring Data MongoDB Terminology RDBMS Mongo DB Database Database Table Collection Row JSON document Column Field Index Index Join Embedded documents & linking Aggregation (e.g. group by) Aggregation framework
- 8. 8 MongoDB Java Spring Data MongoDB Features • JSON data model with dynamic schemas • CRUD operations • Atomic document operations • Ad hoq Queries like SQL (equality, regexp, ranges, geospatial) • Full, flexible index support • Auto-sharding for horizontal scalability • Built-in replication and high availability
- 9. 9 MongoDB Java Spring Data MongoDB Drivers • One wire protocol for all client languages • A driver implementation per language • Responsibilities: - Converting language dependent data structures <-> BSON - Generating ObjectId for _id field
- 10. 10 MongoDB + Java + Spring Data MongoDB Java Spring Data
- 11. 11 MongoDB Java Spring Data MongoDB Java Driver Features • CRUD • Support for replica sets • Connection pooling • Distributed reads to slave servers • BSON serializerdesirializer • JSON serializerdesirializer • GridFS
- 12. 12 MongoDB Java Spring Data MongoDB Java Driver Usage
- 13. 13 MongoDB + Java + Spring Data MongoDB Java Spring Data
- 15. 15 MongoDB Java Spring Data Spring Data MongoDB • Templating • Resource abstraction • Configure connections to mongod/mongos node(s) • Collection lifecycle (create/drop) • Map/Reduce / Aggregation • Object mapping • Annotation based: @Document, @Field, @Index etc. • Classes are mapped to collections, Java Objects to documents • Repository Support • Queries are derived from method signatures • Geospatial Queries
- 16. 16 MongoDB Java Spring Data Instantiating MongoTemplate using XML based metadata:
- 17. 17 MongoDB Java Spring Data Sample CRUD operations using MongoTemplate:
- 18. 18 MongoDB Java Spring Data Mapping annotation overview: • @Id • @Document • @DBRef • @Indexed • @CompoundIndex • @GeoSpatialIndexed • @Transient • @PersistenceConstructor • @Value
- 19. 19 MongoDB Java Spring Data
- 20. 20 MongoDB Java Spring Data Spring Data MongoDB: Repositories • Main concept: • Use the signature of a method to derive the query(at runtime) • Base implementations / abstractions for • CRUD operations • Paging • Sorting
- 21. 21 MongoDB Java Spring Data Spring Data MongoDB: Repositories
- 22. 22 MongoDB Java Spring Data Spring Data MongoDB: Repositories Supported keywords for query methods: Keyword Logical result GreaterThan {"age" : {"$gt" : age}} LessThan {"age" : {"$lt" : age}} Between {"age" : {"$gt" : from, "$lt" : to}} IsNotNull, NotNull {"age" : {"$ne" : null}} IsNull, Null {"age" : null} Like {"age" : age} ( age as regex) (No keyword) {"age" : name} Not {"age" : {"$ne" : name}} Near {"location" : {"$near" : [x,y]}} Within {"location" : {"$within" : {"$center" : [ [x, y], distance]}}} Within {"location" : {"$within" : {"$box" : [ [x1, y1], x2, y2]}}}
- 23. 23 MongoDB Java Spring Data Spring Data MongoDB: Repositories
- 24. 24 MongoDB Java Spring Data • Map/Reduce / Aggregation framework • Index management • Support for GridFS • Geospatial indexes/queries • Optimistic Locking
- 25. 25 MongoDB Java Spring Data • 10gen Education • https://education.10gen.com/ • Spring Data - MongoDB • http://www.springsource.org/spring-data/mongodb • The Little MongoDB Book • http://openmymind.net/2011/3/28/The-Little-MongoDB-Book/
- 26. 26 Questions? MongoDB Java Spring Data Anton Sulzhenko [email protected]