schedulerpb

type FrontendToScheduler struct {
	Type FrontendToSchedulerType `protobuf:"varint,1,opt,name=type,proto3,enum=schedulerpb.FrontendToSchedulerType" json:"type,omitempty"`
	// Used by INIT message. Will be put into all requests passed to querier.
	FrontendAddress string `protobuf:"bytes,2,opt,name=frontendAddress,proto3" json:"frontendAddress,omitempty"`
	// Used by ENQUEUE and CANCEL.
	// Each frontend manages its own queryIDs. Different frontends may use same set of query IDs.
	QueryID uint64 `protobuf:"varint,3,opt,name=queryID,proto3" json:"queryID,omitempty"`
	// Following are used by ENQUEUE only.
	UserID       string                `protobuf:"bytes,4,opt,name=userID,proto3" json:"userID,omitempty"`
	HttpRequest  *httpgrpc.HTTPRequest `protobuf:"bytes,5,opt,name=httpRequest,proto3" json:"httpRequest,omitempty"`
	StatsEnabled bool                  `protobuf:"varint,6,opt,name=statsEnabled,proto3" json:"statsEnabled,omitempty"`
}

type FrontendToSchedulerType int32

type NotifyQuerierShutdownRequest struct {
	QuerierID string `protobuf:"bytes,1,opt,name=querierID,proto3" json:"querierID,omitempty"`
}

type NotifyQuerierShutdownResponse struct {
}

type QuerierToScheduler struct {
	QuerierID string `protobuf:"bytes,1,opt,name=querierID,proto3" json:"querierID,omitempty"`
}

type SchedulerForFrontendClient interface {
	// After calling this method, both Frontend and Scheduler enter a loop. Frontend will keep sending ENQUEUE and
	// CANCEL requests, and scheduler is expected to process them. Scheduler returns one response for each request.
	//
	// Long-running loop is used to detect broken connection between frontend and scheduler. This is important for both
	// parties... if connection breaks, frontend can cancel (and possibly retry on different scheduler) all pending
	// requests sent to this scheduler, while scheduler can cancel queued requests from given frontend.
	FrontendLoop(ctx context.Context, opts ...grpc.CallOption) (SchedulerForFrontend_FrontendLoopClient, error)
}

type SchedulerForFrontendServer interface {
	// After calling this method, both Frontend and Scheduler enter a loop. Frontend will keep sending ENQUEUE and
	// CANCEL requests, and scheduler is expected to process them. Scheduler returns one response for each request.
	//
	// Long-running loop is used to detect broken connection between frontend and scheduler. This is important for both
	// parties... if connection breaks, frontend can cancel (and possibly retry on different scheduler) all pending
	// requests sent to this scheduler, while scheduler can cancel queued requests from given frontend.
	FrontendLoop(SchedulerForFrontend_FrontendLoopServer) error
}

type SchedulerForFrontend_FrontendLoopClient interface {
	Send(*FrontendToScheduler) error
	Recv() (*SchedulerToFrontend, error)
	grpc.ClientStream
}

type SchedulerForFrontend_FrontendLoopServer interface {
	Send(*SchedulerToFrontend) error
	Recv() (*FrontendToScheduler, error)
	grpc.ServerStream
}

type SchedulerForQuerierClient interface {
	// After calling this method, both Querier and Scheduler enter a loop, in which querier waits for
	// "SchedulerToQuerier" messages containing HTTP requests and processes them. After processing the request,
	// querier signals that it is ready to accept another one by sending empty QuerierToScheduler message.
	//
	// Long-running loop is used to detect broken connection between scheduler and querier. This is important
	// for scheduler to keep a list of connected queriers up-to-date.
	QuerierLoop(ctx context.Context, opts ...grpc.CallOption) (SchedulerForQuerier_QuerierLoopClient, error)
	// The querier notifies the query-scheduler that it started a graceful shutdown.
	NotifyQuerierShutdown(ctx context.Context, in *NotifyQuerierShutdownRequest, opts ...grpc.CallOption) (*NotifyQuerierShutdownResponse, error)
}

type SchedulerForQuerierServer interface {
	// After calling this method, both Querier and Scheduler enter a loop, in which querier waits for
	// "SchedulerToQuerier" messages containing HTTP requests and processes them. After processing the request,
	// querier signals that it is ready to accept another one by sending empty QuerierToScheduler message.
	//
	// Long-running loop is used to detect broken connection between scheduler and querier. This is important
	// for scheduler to keep a list of connected queriers up-to-date.
	QuerierLoop(SchedulerForQuerier_QuerierLoopServer) error
	// The querier notifies the query-scheduler that it started a graceful shutdown.
	NotifyQuerierShutdown(context.Context, *NotifyQuerierShutdownRequest) (*NotifyQuerierShutdownResponse, error)
}

type SchedulerForQuerier_QuerierLoopClient interface {
	Send(*QuerierToScheduler) error
	Recv() (*SchedulerToQuerier, error)
	grpc.ClientStream
}

type SchedulerForQuerier_QuerierLoopServer interface {
	Send(*SchedulerToQuerier) error
	Recv() (*QuerierToScheduler, error)
	grpc.ServerStream
}

type SchedulerToFrontend struct {
	Status SchedulerToFrontendStatus `protobuf:"varint,1,opt,name=status,proto3,enum=schedulerpb.SchedulerToFrontendStatus" json:"status,omitempty"`
	Error  string                    `protobuf:"bytes,2,opt,name=error,proto3" json:"error,omitempty"`
}

type SchedulerToFrontendStatus int32

type SchedulerToQuerier struct {
	// Query ID as reported by frontend. When querier sends the response back to frontend (using frontendAddress),
	// it identifies the query by using this ID.
	QueryID     uint64                `protobuf:"varint,1,opt,name=queryID,proto3" json:"queryID,omitempty"`
	HttpRequest *httpgrpc.HTTPRequest `protobuf:"bytes,2,opt,name=httpRequest,proto3" json:"httpRequest,omitempty"`
	// Where should querier send HTTP Response to (using FrontendForQuerier interface).
	FrontendAddress string `protobuf:"bytes,3,opt,name=frontendAddress,proto3" json:"frontendAddress,omitempty"`
	// User who initiated the request. Needed to send reply back to frontend.
	UserID string `protobuf:"bytes,4,opt,name=userID,proto3" json:"userID,omitempty"`
	// Whether query statistics tracking should be enabled. The response will include
	// statistics only when this option is enabled.
	StatsEnabled bool `protobuf:"varint,5,opt,name=statsEnabled,proto3" json:"statsEnabled,omitempty"`
}

type UnimplementedSchedulerForFrontendServer struct {
}

type UnimplementedSchedulerForQuerierServer struct {
}