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it easy to create new client libraries.\nIt already supports a number of popular queueing systems, and adding new ones is intended to be simple.\n\n## Goals\n* Expose multiple consumer (fan out) semantics where needed\n\n* Minimise overhead over direct use of a given queuing system\n\n* Allow configuration of the underlying queue system via runtime configuration of Proximo\n\n* Allow replacement of a queueing system with no change to the Proximo client applications\n\n* Enabling easy creation of client libraries for new languages (anything that has GRPC support)\n\n## Non goals\n* Exposing specific details of the underlying queue system via the client API\n\n## Server\n\nThis is the Proximo server implementation, written in Go\n\n[proximo server](proximo-server/README.md)\n\n## Proximo client libraries\n\n* **go** - [substrate](https://github.com/uw-labs/substrate) - we recommend to use substrate to access\nproximo from go\n\n## API definition (protobuf)\n\n[protobuf definitions](proto/)\n\n## Access Control\n\nAccess Control is supported using an optional config file, using the `PROXIMO_ACL_CONFIG`.\n\nIn this example, all clients can access the topics that start with `products` but only a client called\n`product-writer` has permission to to write to these topics.\n\n```yaml\ndefault:\n  roles: [\"read-products\"]\nroles:\n- id: \"read-products\"\n  consume: [\"products.*\"]\n- id: \"write-products\"\n  publish: [\"products.*\"]\nclients:\n- id: \"product-writer\"\n  secret: \"$2y$10$2AzC3Z8L18cP.crFi.ZDsuFdbwrYu16Lnh8y7U1wMO3QPanYuwJIm\" # pass is bcrypted hash of \"password\"\n  roles: [\"write-products\"]\n```\n\nAdd the token to the context, example:\n\n```golang\nsink, _ := proximo.NewAsyncMessageSink(proximo.AsyncMessageSinkConfig{\n  Broker:   \"localhost:6868\",\n  Topic:    \"products\",\n  Insecure: true,\n})\n\ntoken := base64.StdEncoding.EncodeToString(fmt.Sprintf(\"%s:%s\", \"product-writer\", \"password\"))\nmd := metadata.Pairs(\"Authorization\", fmt.Sprintf(\"Bearer %s\", token))\nreqCtx := metadata.NewOutgoingContext(ctx, md)\n\nsink.PublishMessage(reqCtx, \u0026Message{Data: []byte(\"hello world\")})\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fuw-labs%2Fproximo","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fuw-labs%2Fproximo","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fuw-labs%2Fproximo/lists"}