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Basic streaming plugin support (#31940)

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This pull request migrates testdata to coreplugin streaming capabilities,
this is mostly a working concept of streaming plugins at the moment, 
the work will continue in the following pull requests.
This commit is contained in:
Alexander Emelin
2021-03-23 20:24:08 +03:00
committed by GitHub
parent 1cd8981be4
commit 336bc559a3
31 changed files with 1204 additions and 290 deletions
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25
pkg/plugins/backendplugin/grpcplugin/grpc_plugin.go
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@ -15,6 +15,7 @@ type pluginClient interface {
backend.CollectMetricsHandler
backend.CheckHealthHandler
backend.CallResourceHandler
backend.StreamHandler
}
type grpcPlugin struct {
@ -138,3 +139,27 @@ func (p *grpcPlugin) CallResource(ctx context.Context, req *backend.CallResource
return pluginClient.CallResource(ctx, req, sender)
}
func (p *grpcPlugin) CanSubscribeToStream(ctx context.Context, request *backend.SubscribeToStreamRequest) (*backend.SubscribeToStreamResponse, error) {
p.mutex.RLock()
if p.client == nil || p.client.Exited() || p.pluginClient == nil {
p.mutex.RUnlock()
return nil, backendplugin.ErrPluginUnavailable
}
pluginClient := p.pluginClient
p.mutex.RUnlock()
return pluginClient.CanSubscribeToStream(ctx, request)
}
func (p *grpcPlugin) RunStream(ctx context.Context, req *backend.RunStreamRequest, sender backend.StreamPacketSender) error {
p.mutex.RLock()
if p.client == nil || p.client.Exited() || p.pluginClient == nil {
p.mutex.RUnlock()
return backendplugin.ErrPluginUnavailable
}
pluginClient := p.pluginClient
p.mutex.RUnlock()
return pluginClient.RunStream(ctx, req, sender)
}