moleculer-db-adapter-scylla
v1.2.2
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ScyllaDB adapter for Moleculer DB service.
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ScyllaDB Adapter for MoleculerJS
Overview
The ScyllaDB Adapter for MoleculerJS is a powerful and efficient adapter that allows you to seamlessly integrate ScyllaDB with your Moleculer microservices. This adapter provides a simple and intuitive API for performing CRUD operations, making it easy to manage your data in a ScyllaDB database.
This adapter is built using the express-cassandra package, which simplifies interactions with Cassandra and ScyllaDB.
Features
- CRUD Operations: Easily perform Create, Read, Update, and Delete operations on your ScyllaDB collections.
- Connection Management: Automatically handle connections to your ScyllaDB instance.
- Model Support: Define your data models using a schema and interact with them through the adapter.
- Error Handling: Gracefully handle connection and operation errors.
- UUID Support: Convert string IDs to UUIDs and generate new UUIDs for your entities.
- Testing: Comprehensive unit tests to ensure the reliability of the adapter.
Install
$ npm install moleculer-db moleculer-db-adapter-scylla --save
Usage
Create a Moleculer Service: Define a service that uses the ScyllaDB adapter.
const { ServiceBroker } = require("moleculer");
const DbService = require("moleculer-db");
const ScyllaDbAdapter = require("moleculer-db-adapter-scylla");
const users = require('./users.model'); // Import your model
const scyllaOptions = {
contactPoints: ["127.0.0.1"],
localDataCenter: "datacenter1",
keyspace: "test",
authProvider: { username: "cassandra", password: "cassandra" },
ormOptions: {
defaultReplicationStrategy: {
class: 'SimpleStrategy',
replication_factor: 1
},
migration: 'safe'
}
};
const adapter = new ScyllaDbAdapter(scyllaOptions);
const broker = new ServiceBroker();
broker.createService({
name: "users",
mixins: [DbService],
adapter: adapter,
model: users,
settings: {
// Define any additional settings here
},
});
broker.start()
// Create a new user
.then(() => broker.call("users.create", {
username: "Alice", password: "1234566", age: 21
}))
// Get all users
.then(() => broker.call("users.find", {q: {}}).then(console.log));
Options
Example with scylla options
const scyllaOptions = {
contactPoints: ["127.0.0.1"],
localDataCenter: "datacenter1",
keyspace: "test",
authProvider: { username: "cassandra", password: "cassandra" },
ormOptions: {
defaultReplicationStrategy: {
class: 'SimpleStrategy',
replication_factor: 1
},
migration: 'safe'
}
};
const adapter = new ScyllaDbAdapter(scyllaOptions);
Testing
$ npm test
In development with watching
$ npm run ci
Acknowledgments
- Moleculer - A modern microservices framework for Node.js.
- ScyllaDB - A high-performance NoSQL database compatible with Apache Cassandra.
- express-cassandra - A package that simplifies interactions with Cassandra and ScyllaDB.
License
This project is licensed under the MIT License.
Contact
Copyright (c) 2024 Azita Abdollahi