Drivers
One contract per primitive, 48 interchangeable backends. Configuration selects the driver; your code depends on the contract. This page is the full matrix. Each library's page documents constructors, configuration, and tradeoffs per driver.
Queue
Ten drivers behind one queue API. The first three live in the root module; the rest are optional driver modules you go get only if you use them.
| Driver | What it is for |
|---|---|
workerpool | In-process async workers, the local-first default |
sync | Inline execution, useful for tests and CLIs |
null | Accepts jobs and drops them, for disabling queues cleanly |
redis | Durable distributed queue with full admin operations |
nats | Queue-subject routing over NATS |
rabbitmq | Broker-backed delivery and workers |
sqs | AWS-native queue transport |
postgres | Durable SQL-backed queue |
mysql | Durable SQL-backed queue |
sqlite | Durable embedded SQL queue |
Details: queue library · queues in the framework
Events
8 available drivers behind one typed event bus. The standalone library calls its local driver sync; GoForj Apps expose the same local role as inproc. Apps also use natsjetstream where the library matrix uses the shorter jetstream.
| Driver | What it is for |
|---|---|
sync | In-process dispatch, the local-first default |
null | Drops events, for disabling fan-out cleanly |
nats | Subject-based distributed pub/sub |
jetstream | Durable stream-backed events |
redis | Simple distributed fan-out |
kafka | Topic-based fan-out |
sns | SNS fan-out with SQS delivery |
gcppubsub | Topic and subscription fan-out |
Details: events library · events in the framework
Cache
Ten drivers behind one cache API with TTLs, locks, counters, and rate limits.
| Driver | What it is for |
|---|---|
memory | Fastest in-process cache, the local-first default |
file | Durable single-host cache |
null | No-op cache, for disabling caching cleanly |
redis | Shared cache, locks, and rate limits |
memcached | Simple shared TTL cache |
nats | JetStream KV-backed cache |
dynamodb | DynamoDB-backed shared cache |
sqlite | Durable embedded SQL cache |
postgres | Durable shared SQL cache |
mysql | Durable shared SQL cache |
Details: cache library · cache in the framework
Storage
Nine drivers behind one storage API for files and blobs.
| Driver | What it is for |
|---|---|
local | Local filesystem disks, the local-first default |
memory | In-memory disks for tests |
s3 | S3-compatible object storage |
gcs | Google Cloud object storage |
sftp | Remote filesystem over SSH |
ftp | Remote filesystem integration |
dropbox | Dropbox-backed file storage |
redis | Temporary distributed blob storage |
rclone | Any rclone-supported remote |
Details: storage library · storage in the framework
Mail
Eight drivers behind one fluent message builder.
| Driver | What it is for |
|---|---|
log | Writes messages to the log, the local-first default |
smtp | Any SMTP server, including Mailpit locally |
resend | Resend API delivery |
postmark | Postmark API delivery |
mailgun | Mailgun API delivery |
sendgrid | SendGrid API delivery |
ses | Amazon SES delivery |
fake | In-memory capture for tests |
Details: mail library
Database
Three drivers behind generated connections and the ORM. Dialect differences live in per-driver migration files, rendered for you.
| Driver | What it is for |
|---|---|
sqlite | Local-first embedded SQL for Apps that select it |
postgres | Production relational database |
mysql | Production relational database and the current forj new default |
Details: database connections · migrations
How Selection Works
Driver support is compiled in through *_SUPPORTED_DRIVERS, selection happens at runtime through *_DRIVER variables, and misconfiguration fails fast at startup instead of failing quietly in production. Driver selection covers how to choose; the swap section on the landing page shows the same service code running against local and production backends.