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https://issues.apache.org/jira/browse/PROTON-1450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15959241#comment-15959241
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Kale Blankenship commented on PROTON-1450:
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I'm not the author of that patch, my apologies if my phrasing implied
otherwise. I found it while researching AMQP 1.0 support for Go. Since it's MIT
licensed I figured it might be a useful reference for this issue.
I am working on a pure Go AMQP 1.0 client implementation (hobby project,
pre-alpha). Currently I'm representing filters as `map[Symbol]interface{}`, as
you suggested. I can only find a reference to filters on the source
(http://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-messaging-v1.0-os.html#type-source),
not the target
(http://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-messaging-v1.0-os.html#type-target),
but perhaps I've misunderstood something.
Your AnnotationKey proposal looks to be a good solution. I was considering
using `map[interface{}]interface{}` but only allowing clients of the library to
set annotations via type safe function arguments. Something similar to `func
AnnotationSymbol(key string, value interface{}) OptionFunc`/`func
AnnotationUlong(key uint64, value interface{}) OptionFunc`. Although, since
ulong keys are reserved it may be nice to have specific function arguments for
each of the reserved annotations and a single `func Annotation(key string,
value interface{}) OptionFunc` for "x-" annotations.
> Add Filter LinkOption to Electron API
> -------------------------------------
>
> Key: PROTON-1450
> URL: https://issues.apache.org/jira/browse/PROTON-1450
> Project: Qpid Proton
> Issue Type: Improvement
> Components: go-binding
> Reporter: Kale Blankenship
> Assignee: Alan Conway
>
> There doesn't appear to be a way to set filters with the current Go bindings.
> Microsoft's Event Hubs use filters to indicate the starting offset of
> messages
> (http://azure.github.io/amqpnetlite/articles/azure_eventhubs.html#filter).
> Without this option it would be difficult to properly use the bindings with
> Event Hubs.
> There is a wrapper which patches the bindings to provide the functionality
> here: https://github.com/recobe182/gohub. Though I am not familiar enough
> with Qpid to determine if the patch is reasonable.
> Thank you for considering this request and creating/maintaining this project!
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