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Queue

A Serverless Messaging Service

Oracle Cloud Infrastructure (OCI) Queue is a service for enabling asynchronous (decoupled) communication in a serverless manner. OCI Queue handles high-volume transactional data that requires independent processing without loss or duplication. The service uses open standards (STOMP and OpenAPI-defined REST) endpoints to communicate with any client.

OCI Queue is currently available in a beta program and will go live soon. Stay in the know and get notified once the service is generally available.

OCI Queue features

OCI Queue includes the following features:

  • Scalability—OCI Queue handles unexpected traffic spikes by automatically adding resources based on demand and distributing the workload to the available consumers.
  • High throughput—OCI Queue can support a nearly unlimited number of transactions per second per API action.
  • At-least-once delivery—A message is guaranteed to be delivered to the consumer at least once unless the message is either deleted or expires.
  • Best-effort ordering—Messages are delivered to the consumers in the same sequence they are received from the producers. But occasionally, messages might be delivered in a different order to avoid adding latency for order correction.
  • Message locking—A message is locked to avoid duplicate reads while a consumer processes it or until the visibility timeout period ends.
  • Message batching—Send, receive, update, or delete messages in batches of up to 20 messages to optimize cost.
  • Delivery attempts and dead-letter queues—You can define the number of attempts to deliver a message. If a message can't be consumed successfully, it can be sent to a dead-letter-queue (DLQ). DLQs let you isolate messages for troubleshooting.
  • Encryption—Messages are encrypted end to end.
  • STOMP protocol—STOMP is an open protocol designed for messaging that can boost efficiency as authentication and authorization are done once per connection rather than per HTTP request.
  • REST APIs—OCI Queue can be used with true REST APIs, supported with an OpenAPI specification.
OCI Queue features diagram, description below
Enables Scaling : OCI Queue can enable scaling by having as many consumers as necessary reading from a queue. Enables Decoupling: The Queue client puts messages onto a queue defined for a particular purpose but remains unaware of who the consumer will be, where and how they are deployed. Enables Reliable Delivery: A queue consumer can't process a message from the queue, so rather than the message being lost it is placed into the Dead Letter Queue for remediation.