yglukhov / cassandra

Nim bindings to cassandra db driver

cassandra

Nim bindings to cassandra db driver

Usage

import asyncdispatch, cassandra

proc test() {.async.} =
    let cluster = newCluster()
    let session = newSession()

    # Add contact points
    cluster.setContactPoints("127.0.0.1")

    # Provide the cluster object as configuration to connect the session
    discard await session.connect(cluster)
    echo "Connected"

    let statement = newStatement("SELECT * FROM system.schema_keyspaces WHERE keyspace_name = ?")
    statement[0] = "system"
    let res = await session.execute(statement)
    let val = res.firstRow.columns["strategy_class"]
    let cl = val.string
    echo "result: ", val
    assert(cl == "org.apache.cassandra.locator.LocalStrategy")

waitFor test()

Lower level

While high level bindings are still in development you can use low level bindings generated directly from cassandra.h. You can always take underlying binding type value from higher level api types. As an option, contributions are welcome ;)

Example of mixing two APIs:

import cassandra
import cassandra/bindings # Low-level bindings
let cluster = newCluster()
let session = newSession()

# Add contact points
discard cass_cluster_set_contact_points(cluster.o, "127.0.0.1") # Note: .o is the low-level type

Dependencies

• libcassandra - most likely, you'll have to build it yourself
• libuv - check out your package manager, most likely it will be there