3.2 KiB
eventstore-node
A port of the EventStore .Net ClientAPI to Node.js
Dependencies
- Node.js >= 0.12
- Modules: long, protobufjs, uuid (installed via
npm install)
Status
Unstable
Missing features:
- Ssl connection
- Cluster connection
- Set system settings
Incomplete
- Typed errors: currently most errors are direct instance of Error, which is not practical for error handling
- Performance: there's still some while loop in the code that could be problematic with node.js
- Tests: tests are only covering happy path scenarios for now
Documentation
Offline
The offline documentation can be found in the module folder ./node_modules/eventstore-node/docs.
Online
The online documentation can be found at https://dev.nicdex.com/eventstore-node/docs/
Getting started
Install & run Eventstore on localhost
See http://docs.geteventstore.com/introduction/3.9.0/ .
Example: Storing an event
Save to app.js:
var esClient = require('eventstore-node');
var uuid = require('uuid');
var streamName = "testStream";
var esConnection = esClient.createConnection({}, {"hostname": "localhost", "port": 1113});
esConnection.connect();
esConnection.once('connected', function (tcpEndPoint) {
console.log('Connected to eventstore at ' + tcpEndPoint.hostname + ":" + tcpEndPoint.port);
});
var eventId = uuid.v4();
var eventData = {
a : Math.random(),
b: uuid.v4()
};
var event = esClient.createJsonEventData(eventId, eventData, null, 'testEvent');
console.log("Appending...");
esConnection.appendToStream(streamName, esClient.expectedVersion.any, event)
.then(function(result) {
console.log("Stored event:", eventId);
console.log("Look for it at: http://localhost:2113/web/index.html#/streams/testStream");
esConnection.close();
})
.catch(function(err) {
console.log(err);
});
Run:
npm install uuid
npm install eventstore-node
node app.js
Example: Subscribing to events
cd samples
To subscribe to all events from now on (includes example of a filter which ignores events which we aren't interested in):
node subscribe-all-events.js
To catch up on all events ever and subscribe to all new ones from now on:
node subscribe-catchup-all-events.js
To generate a test event, open a separate console and run:
node store-event.js
Running the tests
To run the tests it is recommended that you use an in-memory instance of the eventstore so you don't pollute your dev instance.
EventStore.ClusterNode.exe --memdb
To execute the tests suites simply run
npm test
Porting .Net Task to Node.js
.Net Task have been replace with Promise. When executing an async command, i.e. appendToStream you can use then/catch to wait for result/error.
License
Ported code is released under the MIT license, see LICENSE.
Original code is released under the EventStore license and can be found at https://github.com/eventstore/eventstore.