We now share more information about the responder and the requestor. The requestor information by default is not shared, but can be when declaring the import.
Also fixed bug for error handling on old request style requests that would always result on a 408 response.
Signed-off-by: Derek Collison <derek@nats.io>
This contains a rewrite to the services layer for exporting and importing. The code this merges to already had a first significant rewrite that moved from special interest processing to plain subscriptions.
This code changes the prior version's dealing with reverse mapping which was based mostly on thresholds and manual pruning, with some sporadic timer usage. This version uses the jetstream branch's code that understands interest and failed deliveries. So this code is much more tuned to reacting to interest changes. It also removes thresholds and goes only by interest changes or expirations based around a new service export property, response thresholds. This allows a service provider to provide semantics on how long a response should take at a maximum.
This commit also introduces formal support for service export streamed and chunked response types send an empty message to signify EOF.
This commit also includes additions to the service latency tracking such that errors are now sent, not only successful interactions. We have added a Status field and an optional Error fields to ServiceLatency.
We support the following Status codes, these are directly from HTTP.
400 Bad Request (request did not have a reply subject)
408 Request Timeout (when system detects request interest went away, old request style to make dependable)..
503 Service Unavailable (no service responders running)
504 Service Timeout (The new response threshold expired)
Signed-off-by: Derek Collison <derek@nats.io>
This is a breaking change and will not be able to restore consumer's from a filestore when upgraded.
We are getting close to settling on the API an once that happens we will not be introducnig any
breaking changes.
Signed-off-by: Derek Collison <derek@nats.io>
The old engine was a simple design to get us started but had a single lock and held that lock around I/O.
This design allows message blocks to have the own RW locks and operate independently and to also not hold
locks while doing most I/O.
Signed-off-by: Derek Collison <derek@nats.io>
I anticipate it would be desirable to allow a microservice running
in an account to create only the stream it needs when it starts up
if there is no stream but no others, so a ACL would be written to
allow that.
Thus adding the T pattern to stream create too.
