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serve.go
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serve.go
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package grpcplugin
import (
"github.com/grafana/grafana-plugin-sdk-go/backend/log"
plugin "github.com/hashicorp/go-plugin"
"google.golang.org/grpc"
)
// ServeOpts contains options for serving plugins.
type ServeOpts struct {
DiagnosticsServer DiagnosticsServer
ResourceServer ResourceServer
DataServer DataServer
StreamServer StreamServer
// GRPCServer factory method for creating GRPC server.
// If nil, the default one will be used.
GRPCServer func(options []grpc.ServerOption) *grpc.Server
}
// Serve starts serving the plugin over gRPC.
func Serve(opts ServeOpts) error {
versionedPlugins := make(map[int]plugin.PluginSet)
pSet := make(plugin.PluginSet)
if opts.DiagnosticsServer != nil {
pSet["diagnostics"] = &DiagnosticsGRPCPlugin{
DiagnosticsServer: opts.DiagnosticsServer,
}
}
if opts.ResourceServer != nil {
pSet["resource"] = &ResourceGRPCPlugin{
ResourceServer: opts.ResourceServer,
}
}
if opts.DataServer != nil {
pSet["data"] = &DataGRPCPlugin{
DataServer: opts.DataServer,
}
}
if opts.StreamServer != nil {
pSet["stream"] = &StreamGRPCPlugin{
StreamServer: opts.StreamServer,
}
}
versionedPlugins[ProtocolVersion] = pSet
if opts.GRPCServer == nil {
opts.GRPCServer = plugin.DefaultGRPCServer
}
plugKeys := make([]string, 0, len(pSet))
for k := range pSet {
plugKeys = append(plugKeys, k)
}
log.DefaultLogger.Debug("Serving plugin", "plugins", plugKeys)
plugin.Serve(&plugin.ServeConfig{
HandshakeConfig: handshake,
VersionedPlugins: versionedPlugins,
GRPCServer: opts.GRPCServer,
})
log.DefaultLogger.Debug("Plugin server exited")
return nil
}