gcloud-kvstore

gcloud-kvstore

Use Datastore as a Key/Value store.

Install

$ npm install --save gcloud-kvstore

Example

var kvstore = require('gcloud-kvstore');
var datastore = require('@google-cloud/datastore')(/*...*/);

var store = kvstore(datastore);

// Set an item.
store.set('todos', ['eat', 'sleep', 'repeat'], function(err, key) {});

// Get an item.
store.get('todos', function(err, todos) {
  // todos:
  //   ['eat', 'sleep', 'repeat']
});

// Delete an item.
store.delete('todos', function(err) {});

How

Google Cloud Datastore is a managed, NoSQL, schemaless database for storing non-relational data. Datastore entities are complex objects. However, we can wrap this complexity to mimic a simple key/value store by storing a numeric or string "key" as the id of an entity.

The example below shows the complexity that is hidden with gcloud-kvstore.

With @google-cloud/datastore:

var key = datastore.key(['KeyValue', 'key']);

datastore.save({
  key: key,
  value: 'value'
}, function() {});

datastore.get(key, function() {});

datastore.delete(key, function() {});

With @google-cloud/datastore + gcloud-kvstore:

var store = require('gcloud-kvstore')(datastore);

store.set('key', 'value', function() {});

store.get('key', function() {});

store.delete('key', function() {});

API

kvstore(datastore)

datastore

A @google-cloud/datastore instance.

kvstore#delete(key, callback)

key

Type: String|Number

callback

Type: Function Executed with the same signature as Datastore#delete.

kvstore#get(key, callback)

key

Type: String|Number

callback

Type: Function Executed with (err, value)

kvstore#set(key, value, callback)

key

Type: String|Number

value

Type: *

callback

Type: Function Executed with the same signature as Datastore#save.

Credit

Concept originally created by Patrick Costello: https://github.com/GoogleCloudPlatform/gcloud-node/issues/256#issuecomment-58962323.

License

MIT © Stephen Sawchuk