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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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20
pkg/plugins/backendplugin/coreplugin/core_plugin.go
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@ -19,6 +19,7 @@ type corePlugin struct {
backend.CheckHealthHandler
backend.CallResourceHandler
backend.QueryDataHandler
backend.StreamHandler
}
// New returns a new backendplugin.PluginFactoryFunc for creating a core (built-in) backendplugin.Plugin.
@ -30,6 +31,7 @@ func New(opts backend.ServeOpts) backendplugin.PluginFactoryFunc {
CheckHealthHandler: opts.CheckHealthHandler,
CallResourceHandler: opts.CallResourceHandler,
QueryDataHandler: opts.QueryDataHandler,
StreamHandler: opts.StreamHandler,
}, nil
}
}
@ -55,9 +57,7 @@ func (cp *corePlugin) DataQuery(ctx context.Context, dsInfo *models.DataSource,
}
func (cp *corePlugin) Start(ctx context.Context) error {
if cp.QueryDataHandler != nil {
cp.isDataPlugin = true
}
cp.isDataPlugin = cp.QueryDataHandler != nil
return nil
}
@ -92,3 +92,17 @@ func (cp *corePlugin) CallResource(ctx context.Context, req *backend.CallResourc
return backendplugin.ErrMethodNotImplemented
}
func (cp *corePlugin) CanSubscribeToStream(ctx context.Context, req *backend.SubscribeToStreamRequest) (*backend.SubscribeToStreamResponse, error) {
if cp.StreamHandler != nil {
return cp.StreamHandler.CanSubscribeToStream(ctx, req)
}
return nil, backendplugin.ErrMethodNotImplemented
}
func (cp *corePlugin) RunStream(ctx context.Context, req *backend.RunStreamRequest, sender backend.StreamPacketSender) error {
if cp.StreamHandler != nil {
return cp.StreamHandler.RunStream(ctx, req, sender)
}
return backendplugin.ErrMethodNotImplemented
}