This document discusses using MongoDB with Spring Data. It shows how to configure MongoDB drivers and templates as beans in Spring. It also demonstrates how to perform CRUD operations on MongoDB documents using Spring Data's MongoRepository interface, including implicit conversion between Java objects and MongoDB documents. Key features of MongoRepository discussed include query methods, custom queries, and asynchronous support.

1. MongoDB with
Spring Data Document
Sean@Weaveus
May 2011

2. <<interface>>
@Autowired
Mongo
Operations
Bean
Mongo
Template
Bean
MongoDB
Driver
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3. DB
Collection#1 Collection#2
Document#1 Document#1
Document#2 Document#2
Document#3 Document#3
Document#4 Document#4
Document#5 Document#5
Document := {UniqueID, JSON Document}
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4. Getting Started - Server
SeaniMac:tmp sean$ ls
mongodb-osx-x86_64-1.8.1.tgz
mongodb-osx-x86_64-1.8.1
SeaniMac:tmp sean$ mkdir -p mongodb-data/db
SeaniMac:tmp sean$ ./mongodb-osx-x86_64-1.8.1/bin/mongod --dbpath ./
mongodb-data/db
Fri May! 6 14:16:48 [initandlisten] MongoDB starting ...
...
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5. Getting Started - Client
SeaniMac:tmp sean$ ./mongodb-osx-x86_64-1.8.1/bin/mongo
MongoDB shell version: 1.8.1
connecting to: test
> db.foo.save( { a: 1 } )
> db.foo.find()
{ "_id" : ObjectId("4dc3855d3044bae59620330d"), "a" : 1 }
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6. Java(Groovy)
import com.mongodb.Mongo
import com.mongodb.DB
import com.mongodb.DBCollection
Mongo m = new Mongo()
println m.databaseNames
DB db = m.getDB("test")
println db.collectionNames
DBCollection dbcol = db.getCollection("foo")
println dbcol.find().next() // DBObject Instance, BSON
// results
[test, admin, db, foo, local]
[foo, system.indexes]
[_id:4dc3855d3044bae59620330d, a:1.0]
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7. Document CRUD
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8. Save
> db.things.save({ name: "mongo" })
> t = { x : 3 }
{ "x" : 3 }
> db.things.save(t)
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9. Find
> db.things.find()
{ "_id" : ObjectId("4dc399fc3044bae59620330e"), "name" : "mongo" }
{ "_id" : ObjectId("4dc3a7913044bae59620330f"), "x" : 3 }
> var cursor = db.things.find();
> while (cursor.hasNext()) printjson(cursor.next());
{ "_id" : ObjectId("4dc399fc3044bae59620330e"), "name" : "mongo" }
{ "_id" : ObjectId("4dc3a7913044bae59620330f"), "x" : 3 }
> db.things.find().forEach( printjson )
{ "_id" : ObjectId("4dc399fc3044bae59620330e"), "name" : "mongo" }
{ "_id" : ObjectId("4dc3a7913044bae59620330f"), "x" : 3 }
> db.things.find({name:"mongo"}).forEach( printjson );
{ "_id" : ObjectId("4dc399fc3044bae59620330e"), "name" : "mongo" }
> db.things.save( {"name":"nosql", "title":"nonRDB"} )
> db.things.find( {name:"nosql"}, {title:true} ).forEach
( printjson )
{ "_id" : ObjectId("4dc3ae133044bae596203312"), "title" : "nonRDB" }
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10. Remove
> db.things.remove({name:"mongo"})
> db.things.remove({"_id":ObjectId("4dc3ae133044bae596203312")})
> db.things.find()!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
{ "_id" : ObjectId("4dc3a7913044bae59620330f"), "x" : 3 }
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11. with Spring Data
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12. MongoTemplate
• Document databases extension to Spring
Programming Model
• SPEL
• DataException hierarchy
• IoC Configuration
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13. Beans @Configuration or XML-Based
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14. <<interface>>
Mongo
Mongo
@Autowired Repository
Operations
Mongo
Criteria
Bean
Mongo
Template
Bean
MongoDB
Driver
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15. Object-Document
Implicit Conversion
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16. • MongoRepository
• Method name based Query
• @Query, QueryDSL
• Criteria, Predication Support
• GPS Query
• Mapping
• @Document(Instead of @Entity)
• Asynchronous Callback
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