Miniredis
This is an all-javascript in-memory implementation of the Redis API, adapted for Meteor.
1var redis = new Miniredis.RedisStore; 2redis.set("key-1-1", "foo"); 3redis.set("key-1-2", "bar");
You can install it by running:
meteor add slava:miniredis
Reactivity
This implementation supports Deps.js reactivity with fine-grained reactivity: if a command was run in a Deps.autorun computation, then the minimal set of dependencies will be tracked.
1var redis = new Miniredis.RedisStore; 2redis.set("key-1-1", "foo"); 3 4Deps.autorun(function () { 5 console.log(_.pluck(redis.matching("key-1-*").fetch(), "value")); 6}); 7// prints ["foo"] 8 9redis.set("key-2-1", "baz"); 10// doesn't print anything 11 12redis.set("key-1-2", "bar"); 13// prints ["foo", "bar"] 14 15redis.set("key-1-1", "foo1"); 16// prints ["foo1", "bar"]
Observe API
Similar to Minimongo's Cursor's, Miniredis Cursors (as returned by
redis.matching("*-pattern-*")
calls) can be observed with added
, changed
and removed
callbacks.
1redis.matching("key-2-*").observe({ 2 added: function (item) { /* item: { _id, value } */ }, 3 changed: function (item, oldItem) { /* item: { _id, value} */ }, 4 removed: function (item) { /* item: { _id, value } */ } 5});
You can also have an ordered observe by passing addedAt
, changedAt
,
removedAt
callbacks. The current order is the lexicographical order of keys.
1redis.matching("key-2-*").observe({ 2 addedAt: function (item, atIndex, before) { /* item: { _id, value } */ }, 3 changedAt: function (item, oldItem, atIndex) { /* item: { _id, value} */ }, 4 removedAt: function (item, atIndex) { /* item: { _id, value } */ } 5});
observeChanges
is also implemented but it is not very different from the
observe
version as of yet.
You can pause/resume observers with the same API as of Minimongo:
1// Pause observers 2redis.pauseObservers(); 3// Make a lot of changes 4_.each(removedValues, function (value, key) { 5 redis.del(key); 6}); 7_.each(newValues, function (value, key) { 8 redis.set(key, value); 9}); 10// Resume 11redis.resumeObservers();
Blaze compatibility
Miniredis's cursors can be observed by Blaze:
1<template name="orderedList"> 2 {{#each listItems}} 3 <div>{{_id}} - {{value}}</div> 4 {{/each}} 5</template>
1Template.orderedList.listItems = function () { 2 return redis.matching("key-2-*"); 3};
Known Issue
- on Meteor 0.8.2 returning a miniredis cursor from a template helper Blaze will
not observe it properly. It is fixed on the
devel
branch and will be released in next Meteor version. To workaround it, return a fetched array from cursor.
Redis API compatibility
To support Meteor's latency compensation, this implementation tries to mimic the behavior of the Redis server.
Right now these Redis commands are implemented and available:
On Strings
- set
- get
- del
- exists
- keys
- randomkey
- rename
- renamenx
- type
- append
- decr
- decrby
- getrange
- getset
- incr
- incrby
- incrbyfloat
- mget
- mset
- msetnx
- setx
- setnx
- setrange
- strlen
On Hashes
- hset
- hsetnx
- hget
- hkeys
- hvals
- hgetall
- hincrby
- hincrbyfloat
- hdel
- hmset
- hmget
- hlen
- hexists
On Lists
- lpush
- rpush
- lpop
- rpop
- lindex
- linsert
- lrange
- lset
- ltrim
- llen
- lpushx
- rpushx
License
MIT (c) Meteor Development Group