dynamodb-cache-manager

$3

Library is extenstion for cache-manager.
DynamoDB is not typical usecase for caches, but can be used as backing engine to store your cache or configuration.

$3

Regular usecase for that lib is to chain DynamoDB with memory cache. It will give you persistance layer + fast access.
For example it can be used to load your application configuration dynamically from the DynamoDB. Here is example.

``
var Promise = require('bluebird');
var cacheManager = require('cache-manager');
var DynamoDB = require('dynamodb-cache-manager');

var memoryCache = cacheManager.caching({
store: 'memory',
max: 100,
ttl: 10,
});

var dynamoDBCache = cacheManager.caching({
store: DynamoDB,
tableName: 'tableName',
keyField: 'key'.
valField: 'cache',
connection: {
region: 'us-east-1'
}
});

var memory = Promise.promisifyAll(memoryCache);
var dynamo = Promise.promisifyAll(dynamoDbCache);

dynamoDbCache.get('12345', (err, res) => {
console.log(res);
});

var pollCache = () => {
return memory.getAsync(key)
.then(res => {
if (res) return res;
else return dynamo.getAsync(key)
.then(res => memory.set(key, res))
.then(() => memory.get(key));
})
.then((res) => {
console.log("Cache data: " + res);
setTimeout(fn, 1000)
})
.catch(err => {
console.error(err);
});
}

pollCache();
``

Above example will poll DynamoDB every 10 seconds and store result in memory, so every time you access it it won't go to the database.

TODO

* finish/fix docs
* figure our right wasy to utilize cache-mananger multicache