Download as PDF, PPTX
![db.users.find({ $or : [ { age : {$gt:20,$lt:30} } ,
{ age : {$gt:50,$lt:60} } ] })
Java Driver :
DB db = mongo.getDB("users");
DBCollection users = db.getCollection("users");
DBObject firstQuery = QueryBuilder.start("age").greaterThan(20).lessThan(30).get();
DBObject secondQuery = QueryBuilder.start("age").greaterThan(50).lessThan(60).get();
DBObject query = QueryBuilder.start().or(firstQuery,secondQuery).get();
DBCursor results = collection.find(query);
List<User> users = new ArrayList<User>();
for (DBObject result : results) {
User user = new User();
user.setUsername((String) result.get("username"));
user.setAge((Integer) result.get("age"));
users.add(user);
}
mardi 4 décembre 12](https://image.slidesharecdn.com/jongomongosv-121204161705-phpapp01/85/Jongo-mongo-sv-11-320.jpg)
![db.users.find({ $or : [ { age : {$gt:20,$lt:30} } ,
{ age : {$gt:50,$lt:60} } ] })
Jongo find
MongoCollection collection = new Jongo(db).getCollection("users");
Iterable<User> users = collection.find("{ $or : [ { age : {$gt:20,$lt:30} } , { age :
{$gt:50,$lt:60} } ] }").as(User.class);
mardi 4 décembre 12](https://image.slidesharecdn.com/jongomongosv-121204161705-phpapp01/85/Jongo-mongo-sv-12-320.jpg)
![DB db = mongo.getDB("users");
DBCollection collection = db.getCollection("users");
DBObject firstQuery = QueryBuilder.start("age").greaterThan(20).lessThan(30).get();
DBObject secondQuery = QueryBuilder.start("age").greaterThan(50).lessThan(60).get();
DBObject query = QueryBuilder.start().or(firstQuery,secondQuery).get();
DBCursor results = collection.find(query);
List<User> users = new ArrayList<User>();
for (DBObject result : results) {
User user = new User();
user.setUsername((String) result.get("username"));
user.setAge((Integer) result.get("age"));
users.add(user);
}
MongoCollection collection = new Jongo(db).getCollection("users");
Iterable<User> users = collection.find("{ $or : [ { age : {$gt:20,$lt:30} } , { age : {$gt:
50,$lt:60} } ] }").as(User.class);
mardi 4 décembre 12](https://image.slidesharecdn.com/jongomongosv-121204161705-phpapp01/85/Jongo-mongo-sv-13-320.jpg)
Uploaded byKatia Aresti
Jongo mongo sv
Jongo provides an easy way to use MongoDB from Java applications by mapping MongoDB queries and operations to Java objects and methods. It uses Jackson and BSON4Jackson for converting between BSON and Java types, allowing queries to be written in Java similarly to how they are written in the MongoDB shell. This simplifies common tasks like find, update, and aggregation operations without needing to use the more low-level Java driver API directly. Jongo also supports features like templating of queries, custom mapping of results, and aggregation pipelines.
More Related Content
Jongo mongo sv
- 1. Mongo + Java= Jongo Mongo and Java made easy ! by @karesti - MongoSV 2012 mardi 4 décembre 12
- 2. Agile Developer MongoDB User @karesti MongoDB Master Katia Aresti mardi 4 décembre 12
- 3. Back on 2010... mardi 4 décembre 12
- 4. {mongo : "awesome"} mardi4 décembre 12
- 5. DBObject API REST Web Services Search of POI-s {DBObject : "not bad, not awesome"} mardi 4 décembre 12
- 6. Back on 2010... Morphia ? mardi 4 décembre 12
- 7. Morphia JPA-LIKE mardi 4 décembre 12
- 8. So ... • Morphia is great, good work ! • But : Need to learn another API => Mongo, Java Driver, Morphia • But : JPA Like -> Mongo Paradigm is not JPA / Hibernate • Morphia is comming to Java Driver ? • Final choice : • Morphia for the Java - DBObject Mapping mardi 4 décembre 12
- 9. Late 2011 ... mardi4 décembre 12
- 10. @bguerout Jongo @amsellemyves • What’s Jongo ? • ODM on top of the Java Driver • Jackson and BSON4Jackson for (Un)marshalling • No JPA / Hibernate style • Query in Java as in Mongo Shell mardi 4 décembre 12
- 11. db.users.find({ $or :[ { age : {$gt:20,$lt:30} } , { age : {$gt:50,$lt:60} } ] }) Java Driver : DB db = mongo.getDB("users"); DBCollection users = db.getCollection("users"); DBObject firstQuery = QueryBuilder.start("age").greaterThan(20).lessThan(30).get(); DBObject secondQuery = QueryBuilder.start("age").greaterThan(50).lessThan(60).get(); DBObject query = QueryBuilder.start().or(firstQuery,secondQuery).get(); DBCursor results = collection.find(query); List<User> users = new ArrayList<User>(); for (DBObject result : results) { User user = new User(); user.setUsername((String) result.get("username")); user.setAge((Integer) result.get("age")); users.add(user); } mardi 4 décembre 12
- 12. db.users.find({ $or :[ { age : {$gt:20,$lt:30} } , { age : {$gt:50,$lt:60} } ] }) Jongo find MongoCollection collection = new Jongo(db).getCollection("users"); Iterable<User> users = collection.find("{ $or : [ { age : {$gt:20,$lt:30} } , { age : {$gt:50,$lt:60} } ] }").as(User.class); mardi 4 décembre 12
- 13. DB db =mongo.getDB("users"); DBCollection collection = db.getCollection("users"); DBObject firstQuery = QueryBuilder.start("age").greaterThan(20).lessThan(30).get(); DBObject secondQuery = QueryBuilder.start("age").greaterThan(50).lessThan(60).get(); DBObject query = QueryBuilder.start().or(firstQuery,secondQuery).get(); DBCursor results = collection.find(query); List<User> users = new ArrayList<User>(); for (DBObject result : results) { User user = new User(); user.setUsername((String) result.get("username")); user.setAge((Integer) result.get("age")); users.add(user); } MongoCollection collection = new Jongo(db).getCollection("users"); Iterable<User> users = collection.find("{ $or : [ { age : {$gt:20,$lt:30} } , { age : {$gt: 50,$lt:60} } ] }").as(User.class); mardi 4 décembre 12
- 14. db.users.update({ name :'Joe' } , { {$inc : {age : 1} }, true, true) Jongo update MongoCollection users = new Jongo(db).getCollection("users"); users.update("{name: 'Joe'}").upsert().multi().with("{$inc: {age: 1}}"); mardi 4 décembre 12
- 15. Templating MongoCollection collection = new Jongo(db).getCollection("users"); friends.find("{name: #, age: #}", "John", 18); {name: 'John', age: 18} mardi 4 décembre 12
- 16. Aggregation Fw MongoCollection collection = new Jongo(db).getCollection("emails"); collection.aggregate("{$project:{sender:1}}") .and("{$match:{tags:'read'}}") .and("{$limit:10}") .as(Email.class); mardi 4 décembre 12
- 17. Custom Mapper MongoCollection collection = new Jongo(db).getCollection("users"); Iterable<Integer> ages = col.find("{'name':'John'}").map( new ResultMapper<Integer>() { @Override public Integer map(DBObject result) { return result.get("age"); } } ); mardi 4 décembre 12
- 18. Conclusion • Mongo Shell is pleasure, Java+Mongo can be a pleasure too • I would love Java Driver API was similar to Jongo ! mardi 4 décembre 12
- 19. http://jongo.org/ https://github.com/bguerout/jongo @bguerout - Benoit Guérout @amsellemyves - Yves Amsellem @karesti - Katia Aresti mardi 4 décembre 12
- 20. Thank you forlistening !!! mardi 4 décembre 12