/
helper.go
48 lines (41 loc) · 1.41 KB
/
helper.go
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package lib
import (
"context"
"log/slog"
"github.com/iansmith/parigot/lib/go/future"
"google.golang.org/protobuf/proto"
"github.com/iansmith/parigot/g/queue/v1"
)
// FindOrCreateQueue gets a queue by name, creating it if necessary. The return
// value will be the queue.QueueIdZeroValue if there was any error,
// which is a bit dodgy.
func FindOrCreateQueue(ctx context.Context, queueHandle queue.Client, name string) *future.Base[queue.QueueId] {
req := queue.LocateRequest{}
req.QueueName = name
slog.Info("FindOrCreateQueue: looking for queue '%s'...", name)
qidFuture := future.NewBase[queue.QueueId]()
locateFuture := queueHandle.Locate(ctx, &req)
locateFuture.Success(func(raw proto.Message) {
resp := raw.(*queue.LocateResponse)
qidFuture.Set(queue.UnmarshalQueueId(resp.Id))
})
locateFuture.Failure(func(raw int32) {
qerr := queue.QueueErr(raw)
if qerr != queue.QueueErr_NotFound {
qidFuture.Set(queue.QueueIdZeroValue())
}
createReq := &queue.CreateQueueRequest{
QueueName: name,
}
fcreate := queueHandle.CreateQueue(ctx, createReq)
fcreate.Success(func(raw proto.Message) {
resp := raw.(*queue.CreateQueueResponse)
qidFuture.Set(queue.UnmarshalQueueId(resp.Id))
})
fcreate.Failure(func(raw int32) {
slog.Error("unable to create queue for testing: %s", queue.QueueErr_name[raw])
qidFuture.Set(queue.QueueIdZeroValue()) //xxx hack with zero value
})
})
return qidFuture
}