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Commands

A node source can either be created with a custom config during initialization or updated via commands using the elb function.

elb​

The elb function gets returned when creating a node source. It pushes events and commands to the instance and runs asynchronously by returning a promise.

import { createSourceNode } from '@elbwalker/source-node';
const { elb } = createSourceNode();

const result = await elb('entity action', { foo: 'bar' });

Configuration​

To configure the node source either do it while creating an instance or use the walker config command:

elb('walker config', {
  globalsStatic: {}, // Static attributes added to each event
  onError: console.log, // Custom error handler
  onLog: console.error, // Custom logging
});

Run​

A run can be seen like a cycle where all events are processed in the same group. A run is required to start the processing of events. Before starting a run all IDs and configurations should be set.

elb('walker run');

Destinations​

The walker destination command adds a destination to the node source.

const destinationLog = { push: console.log };
elb('walker destination', destinationLog, {
  /* destination config */
});
info

Learn more about consent management in detail.

Those names can be defined arbitrarily, but common groups are functional, analytics, and marketing. Values are booleans, and once a value is set to true it's treated as consent being granted. Previously pushed events during the run are now shared with destinations and new ones.

elb('walker consent', { marketing: true, randomTool: true });

Setting a consent state to false will immediately stop a destination from processing any events.

User​

Setting the user IDs. There are three levels for user identification. Typically, the user is a company's internal ID. In contrast, the device ID can be treated as a value stored in a cookie for a more extended period, and the session can be used for temporary identification.

elb('walker user', {
  id: 'us3r',
  device: 'c00k13',
  session: 's3ss10n',
  hash: getHash(str),
});

The new user IDs have been added to each event. Make sure only to use hashed or anonymous ids.

{
  "event": "entity action",
  "user": {
    "id": "us3r",
    "device": "c00k13",
    "session": "s3ss10n"
    "hash": "h4sh3d"
  }
  // other properties omitted
}
info

Learn more about identification and user stitching in the guides.

caution

We highly recommend only using fully anonymized & arbitrary IDs by default and checking your options with persistent user IDs with your data protection officer.