131 lines
3.5 KiB
Markdown
131 lines
3.5 KiB
Markdown
# eventstore-node
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A port of the EventStore .Net ClientAPI to Node.js
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## Status
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### Missing features:
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- Ssl connection
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- Set system settings
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### Areas to improve
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- Errors
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- Use codes or types to differentiate between errors
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- Performance
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- Performance hasn't been tested yet
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- Tests
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- Can always do with more tests
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## Getting started
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Install using `npm install eventstore-node`
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### Dependencies
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- Node.js >= 0.12
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- Modules: [long](https://www.npmjs.org/package/long), [protobufjs](https://www.npmjs.org/package/protobufjs), [uuid](https://www.npmjs.org/package/uuid) (installed via `npm install`)
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### API Documentation
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#### Offline
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The offline documentation can be found in the module folder `./node_modules/eventstore-node/docs`.
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#### Online
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The online documentation can be found at [https://dev.nicdex.com/eventstore-node/docs/](https://dev.nicdex.com/eventstore-node/docs/)
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### Install & run an Eventstore on localhost
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See http://docs.geteventstore.com/introduction/3.9.0/ .
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### Example: Storing an event
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Save to ```app.js:```
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```javascript
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var esClient = require('eventstore-node');
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var uuid = require('uuid');
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var streamName = "testStream";
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/*
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Connecting to a single node using "tcp://localhost:1113"
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- to connect to a cluster via dns discovery use "discover://my.host:2113"
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- to connect to a cluster via gossip seeds use
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[
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new esClient.GossipSeed({host: '192.168.1.10', port: 2113}),
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new esClient.GossipSeed({host: '192.168.1.11', port: 2113}),
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new esClient.GossipSeed({host: '192.168.1.12', port: 2113})
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]
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*/
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var connSettings = {}; // Use defaults
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var esConnection = esClient.createConnection(connSettings, "tcp://localhost:1113");
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esConnection.connect();
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esConnection.once('connected', function (tcpEndPoint) {
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console.log('Connected to eventstore at ' + tcpEndPoint.host + ":" + tcpEndPoint.port);
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});
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var eventId = uuid.v4();
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var eventData = {
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a : Math.random(),
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b: uuid.v4()
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};
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var event = esClient.createJsonEventData(eventId, eventData, null, 'testEvent');
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console.log("Appending...");
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esConnection.appendToStream(streamName, esClient.expectedVersion.any, event)
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.then(function(result) {
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console.log("Stored event:", eventId);
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console.log("Look for it at: http://localhost:2113/web/index.html#/streams/testStream");
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esConnection.close();
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})
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.catch(function(err) {
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console.log(err);
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});
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```
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Run:
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```json
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npm install uuid
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npm install eventstore-node
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node app.js
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```
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### Example: Subscribing to events
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```cd samples```
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To subscribe to all events from now on (includes example of a filter which ignores events which we aren't interested in):
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```node subscribe-all-events.js```
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To catch up on all events ever and subscribe to all new ones from now on:
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```node subscribe-catchup-all-events.js```
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To generate a test event, open a separate console and run:
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```node store-event.js```
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## Running the tests
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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.
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EventStore.ClusterNode.exe --memdb
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To execute the tests suites simply run
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npm test
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## Porting .Net Task to Node.js
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Any async commands returns a [Promise](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Promise) object in replacement of .Net Task.
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## License
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Ported code is released under the MIT license, see [LICENSE](https://github.com/nicdex/eventstore-node/blob/master/LICENSE).
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Original code is released under the EventStore license and can be found at https://github.com/eventstore/eventstore.
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