warp-contracts-redis
v0.4.2
Published
Redis implementation for Warp Contracts
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Warp Contracts Redis Cache
Warp Contracts SortKeyCache implementation using Redis.
Warp Contracts will open
and close
the client many times, and we have seen that this causes unexpected errors sometimes, mostly due to client being closed. Furthermore, we would like to have an "online" cache option rather than local caches too. That is why this package was developed.
RedisCache
solves the open
and close
problem with a "managed" setting. Instead of providing a URL, you can provide the Redis client itself. The effects of doing that are as follows:
open
function will be disabled, calling it will have no effect; it is user's responsibility to connect.close
function will be disabled, calling it will have no effect; it is user's responsibility to disconnect.- the user should make the necessary configurations for
inMemory: true
option; a static function is exposed for this purpose:setConfigForInMemory
. - you can see if the client is managed or not via the
isManaged
field.
Some of the functionality is achieved via Lua scripts (v5.1), which you can find under src/lua
for reference; the actual scripts are written in luaScripts.ts
. The prefix
and subLevelSeparator
must be provided as argument to Lua scripts, because multiple RedisCache
instances may be created with different prefixes or sub-level separators but they may connect to the same client; and for that reason we can't simply hardcode them in the script.
[!TIP]
To learn more about SortKeyCache, see the links below:
Installation
You can install the NPM package as shown below:
npm i warp-contracts-redis
yarn add warp-contracts-redis
pnpm add warp-contracts-redis
Usage
The RedisCache
constructor takes two inputs, one is of type CacheOptions
as is the case for all SortKeyCache
implementations of Warp Contracts. The other is Redis-specific options.
import type { CacheOptions } from "warp-contracts";
import type { RedisOptions } from "warp-contracts-redis";
const cacheOptions = {
// does not dump on close
inMemory: true,
// acts as a prefix for all keys
dbLocation: "redis.location",
// separates key from sortKey
subLevelSeparator: "|",
} satisfies CacheOptions;
const redisOptions = {
// redis connection url
url: "redis://default:redispw@localhost:6379",
// leave at least this many on pruning
minEntriesPerContract: 10,
// after this many entries, prune
maxEntriesPerContract: 100,
} satisfies RedisOptions;
const redisCache = new RedisCache(cacheOptions, redisOptions);
For the managed version, simply create your ioredis
client outside and pass it within redisOptions
similar to the example above; do not pass in URL.
Test
Tests require a Redis server running at the specified URL within tests/constants
. We use the default Redis URL for that, if you would like to run tests on a custom URL you must change the URL within the constants file.
pnpm test # test everything
pnpm test <path> # test a specific suite
Building
Build the package with:
pnpm build
Styling
Check styling with:
pnpm format
pnpm lint