mongodb(5)Clients -Scala - Scala Casbah
mongodb(5)Clients -Scala - Scala Casbah
4. Clients
Casbah is wrappers and extensions to the Java Driver. It is a layer on top of the official mongo-java-driver.
Using Casbah
Add this to build.sbt file.
"org.mongodb" % "casbah_2.10" % "2.6.4"
Here is my Test App
package com.sillycat.easynosqlscala.app
import com.mongodb.casbah.Imports._
object TestConnectionApp extends App{
//connection
val rs1 = new ServerAddress("localhost", 27017)
val rs2 = new ServerAddress("localhost", 27018)
val rs3 = new ServerAddress("localhost", 27019)
val client = MongoClient(List(rs1, rs2, rs3))
//database
val db = client("test")
println("previous tables = " + db.collectionNames)
db.dropDatabase()
//collection
val colUsers = db("users")
//create
val a = MongoDBObject("name" -> "Carl", "nickName" -> "sillycat", "age" -> 31)
val b = MongoDBObject("name" -> "Rachel", "nickName" -> "kiko", "age" -> 27)
colUsers.insert(a)
colUsers.insert(b)
//count
println("number of the users = " + colUsers.count() )
//query
val all = colUsers.find()
all.foreach { item =>
println("item of User = " + item)
}
val one = colUsers.findOne(MongoDBObject("name" -> "Carl"))
println("find one = " + one)
//update
colUsers.update(MongoDBObject("name" -> "Carl"),
MongoDBObject("name" -> "Carl", "nickName" -> "sillycat", "age" -> 31, "language" -> "JAVA"))
val one_1 = colUsers.findOne(MongoDBObject("name" -> "Carl"))
println("find one = " + one_1)
//removing
colUsers.remove(MongoDBObject("name" -> "Carl"))
//drop all the data
colUsers.drop()
}
All the things is in project easynosqlscala.
References:
http://docs.mongodb.org/ecosystem/drivers/scala/
http://mongodb.github.io/casbah/
http://mongodb.github.io/casbah/guide/connecting.html
http://mongodb.github.io/casbah/guide/index.html