/
ModuleAPIServer.go
563 lines (518 loc) · 15 KB
/
ModuleAPIServer.go
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/* ModuleAPIServer.go: provides the RPC API. All gRPC calls live here
* (except PhoneHome, which is a special exception in StateSyncEngine.go)
*
* Author: J. Lowell Wofford <lowell@lanl.gov>
*
* This software is open source software available under the BSD-3 license.
* Copyright (c) 2018, Triad National Security, LLC
* See LICENSE file for details.
*/
//go:generate protoc -I proto/src --gogo_out=Mgoogle/protobuf/any.proto=github.com/gogo/protobuf/types,Mgoogle/protobuf/empty.proto=github.com/gogo/protobuf/types,plugins=grpc:proto proto/src/ModuleAPI.proto
package core
import (
"context"
"fmt"
"net"
ptypes "github.com/gogo/protobuf/types"
pb "github.com/kraken-hpc/kraken/core/proto"
ct "github.com/kraken-hpc/kraken/core/proto/customtypes"
"github.com/kraken-hpc/kraken/lib/types"
"github.com/kraken-hpc/kraken/lib/util"
"google.golang.org/grpc"
"google.golang.org/grpc/reflection"
)
///////////////////////
// Auxiliary objects /
/////////////////////
// A DiscoveryEvent announce a discovery
// This should probably live elsewhere
// This maps directly to a pb.DiscoveryControl
type DiscoveryEvent struct {
ID string // ID of a service instance
URL string // fully qualified, with node
ValueID string
}
func (de *DiscoveryEvent) String() string {
return fmt.Sprintf("(%s) %s == %s", de.ID, de.URL, de.ValueID)
}
//////////////////////
// ModuleAPIServer Object /
////////////////////
var _ pb.ModuleAPIServer = (*ModuleAPIServer)(nil)
// ModuleAPIServer is the gateway for gRPC calls into Kraken (i.e. the Module interface)
type ModuleAPIServer struct {
nlist net.Listener
ulist net.Listener
query *QueryEngine
log types.Logger
em types.EventEmitter
sm types.ServiceManager
schan chan<- types.EventListener
self types.NodeID
}
// NewModuleAPIServer creates a new, initialized API
func NewModuleAPIServer(ctx Context) *ModuleAPIServer {
api := &ModuleAPIServer{
nlist: ctx.RPC.NetListner,
ulist: ctx.RPC.UNIXListener,
query: &ctx.Query,
log: &ctx.Logger,
em: NewEventEmitter(types.Event_API),
schan: ctx.SubChan,
self: ctx.Self,
sm: ctx.Sm,
}
api.log.SetModule("API")
return api
}
func (s *ModuleAPIServer) QueryCreate(ctx context.Context, in *pb.Query) (out *pb.Query, e error) {
pbin := in.GetNode()
out = &pb.Query{}
if pbin == nil {
e = fmt.Errorf("create query must contain a valid node")
return
}
nin := NewNodeFromMessage(pbin)
var nout types.Node
nout, e = s.query.Create(nin)
out.URL = in.URL
if nout != nil {
out.Payload = &pb.Query_Node{Node: nout.Message().(*pb.Node)}
}
return
}
func (s *ModuleAPIServer) QueryRead(ctx context.Context, in *pb.Query) (out *pb.Query, e error) {
var nout types.Node
out = &pb.Query{}
nout, e = s.query.Read(ct.NewNodeIDFromURL(in.URL))
out.URL = in.URL
if nout != nil {
out.Payload = &pb.Query_Node{Node: nout.Message().(*pb.Node)}
}
return
}
func (s *ModuleAPIServer) QueryReadDsc(ctx context.Context, in *pb.Query) (out *pb.Query, e error) {
var nout types.Node
out = &pb.Query{}
nout, e = s.query.ReadDsc(ct.NewNodeIDFromURL(in.URL))
out.URL = in.URL
if nout != nil {
out.Payload = &pb.Query_Node{Node: nout.Message().(*pb.Node)}
}
return
}
func (s *ModuleAPIServer) QueryUpdate(ctx context.Context, in *pb.Query) (out *pb.Query, e error) {
pbin := in.GetNode()
out = &pb.Query{}
if pbin == nil {
e = fmt.Errorf("update query must contain a valid node")
return
}
nin := NewNodeFromMessage(pbin)
out.URL = in.URL
if in.Filter == nil || len(in.Filter) == 0 {
// whole node update
var nout types.Node
nout, e = s.query.Update(nin)
if nout != nil {
out.Payload = &pb.Query_Node{Node: nout.Message().(*pb.Node)}
}
} else {
// this is a setvalue update
out.Filter = []string{}
out.Payload = in.Payload // should we actually update this? seems unnecessarily costly
for _, f := range in.Filter {
v, e := nin.GetValue(f)
if e != nil {
return nil, e
}
if _, e = s.query.SetValue(util.NodeURLJoin(nin.ID().String(), f), v); e != nil {
continue
}
out.Filter = append(out.Filter, f)
}
}
return
}
func (s *ModuleAPIServer) QueryUpdateDsc(ctx context.Context, in *pb.Query) (out *pb.Query, e error) {
pbin := in.GetNode()
out = &pb.Query{}
if pbin == nil {
e = fmt.Errorf("update query must contain a valid node")
return
}
nin := NewNodeFromMessage(pbin)
out.URL = in.URL
if in.Filter == nil || len(in.Filter) == 0 {
// whole node update
var nout types.Node
nout, e = s.query.UpdateDsc(nin)
if nout != nil {
out.Payload = &pb.Query_Node{Node: nout.Message().(*pb.Node)}
}
} else {
// this is a setvalue update
out.Filter = []string{}
out.Payload = in.Payload // should we actually update this? seems unnecessarily costly
for _, f := range in.Filter {
v, e := nin.GetValue(f)
if e != nil {
return nil, e
}
if _, e = s.query.SetValueDsc(util.NodeURLJoin(nin.ID().String(), f), v); e != nil {
continue
}
out.Filter = append(out.Filter, f)
}
}
return
}
func (s *ModuleAPIServer) QueryDelete(ctx context.Context, in *pb.Query) (out *pb.Query, e error) {
var nout types.Node
out = &pb.Query{}
nout, e = s.query.Delete(ct.NewNodeIDFromURL(in.URL))
out.URL = in.URL
if nout != nil {
out.Payload = &pb.Query_Node{Node: nout.Message().(*pb.Node)}
}
return
}
func (s *ModuleAPIServer) QueryReadAll(ctx context.Context, in *ptypes.Empty) (out *pb.QueryMulti, e error) {
var nout []types.Node
out = &pb.QueryMulti{}
out.Queries = []*pb.Query{}
nout, e = s.query.ReadAll()
for _, n := range nout {
q := &pb.Query{
URL: n.ID().String(),
Payload: &pb.Query_Node{
Node: n.Message().(*pb.Node),
},
}
out.Queries = append(out.Queries, q)
}
return
}
func (s *ModuleAPIServer) QueryReadAllDsc(ctx context.Context, in *ptypes.Empty) (out *pb.QueryMulti, e error) {
var nout []types.Node
out = &pb.QueryMulti{}
out.Queries = []*pb.Query{}
nout, e = s.query.ReadAllDsc()
for _, n := range nout {
q := &pb.Query{
URL: n.ID().String(),
Payload: &pb.Query_Node{
Node: n.Message().(*pb.Node),
},
}
out.Queries = append(out.Queries, q)
}
return
}
func (s *ModuleAPIServer) QueryMutationNodes(ctx context.Context, in *ptypes.Empty) (out *pb.Query, e error) {
var mnlout pb.MutationNodeList
url := "/graph/nodes"
out = &pb.Query{}
mnlout, e = s.query.ReadMutationNodes(url)
out.URL = url
if mnlout.MutationNodeList != nil {
out.Payload = &pb.Query_MutationNodeList{
MutationNodeList: &mnlout,
}
}
return
}
func (s *ModuleAPIServer) QueryMutationEdges(ctx context.Context, in *ptypes.Empty) (out *pb.Query, e error) {
var melout pb.MutationEdgeList
url := "/graph/nodes"
out = &pb.Query{}
melout, e = s.query.ReadMutationEdges(url)
out.URL = "/graph/nodes"
if melout.MutationEdgeList != nil {
out.Payload = &pb.Query_MutationEdgeList{
MutationEdgeList: &melout,
}
}
return
}
func (s *ModuleAPIServer) QueryNodeMutationNodes(ctx context.Context, in *pb.Query) (out *pb.Query, e error) {
var mnlout pb.MutationNodeList
out = &pb.Query{}
mnlout, e = s.query.ReadNodeMutationNodes(in.URL)
out.URL = in.URL
if mnlout.MutationNodeList != nil {
out.Payload = &pb.Query_MutationNodeList{
MutationNodeList: &mnlout,
}
}
return
}
func (s *ModuleAPIServer) QueryNodeMutationEdges(ctx context.Context, in *pb.Query) (out *pb.Query, e error) {
var melout pb.MutationEdgeList
out = &pb.Query{}
melout, e = s.query.ReadNodeMutationEdges(in.URL)
out.URL = in.URL
if melout.MutationEdgeList != nil {
out.Payload = &pb.Query_MutationEdgeList{
MutationEdgeList: &melout,
}
}
return
}
func (s *ModuleAPIServer) QueryNodeMutationPath(ctx context.Context, in *pb.Query) (out *pb.Query, e error) {
var mpout pb.MutationPath
out = &pb.Query{}
mpout, e = s.query.ReadNodeMutationPath(in.URL)
out.URL = in.URL
if mpout.Chain != nil {
out.Payload = &pb.Query_MutationPath{
MutationPath: &mpout,
}
}
return
}
func (s *ModuleAPIServer) QueryDeleteAll(ctx context.Context, in *ptypes.Empty) (out *pb.QueryMulti, e error) {
var nout []types.Node
out = &pb.QueryMulti{}
out.Queries = []*pb.Query{}
nout, e = s.query.DeleteAll()
for _, n := range nout {
q := &pb.Query{
URL: n.ID().String(),
Payload: &pb.Query_Node{
Node: n.Message().(*pb.Node),
},
}
out.Queries = append(out.Queries, q)
}
return
}
func (s *ModuleAPIServer) QueryFreeze(ctx context.Context, in *ptypes.Empty) (out *pb.Query, e error) {
e = s.query.Freeze()
out = &pb.Query{}
return
}
func (s *ModuleAPIServer) QueryThaw(ctx context.Context, in *ptypes.Empty) (out *pb.Query, e error) {
e = s.query.Thaw()
out = &pb.Query{}
return
}
func (s *ModuleAPIServer) QueryFrozen(ctx context.Context, in *ptypes.Empty) (out *pb.Query, e error) {
out = &pb.Query{}
rb, e := s.query.Frozen()
out.Payload = &pb.Query_Bool{Bool: rb}
return
}
/*
* Service management
*/
func (s *ModuleAPIServer) ServiceInit(sir *pb.ServiceInitRequest, stream pb.ModuleAPI_ServiceInitServer) (e error) {
s.log.Logf(types.LLDDDEBUG, "got service init request for module (%s) id (%s)\n", sir.Module, sir.Id)
srv := s.sm.GetService(sir.GetId())
self, e := s.query.Read(s.self)
if e != nil {
return
}
any, e := ptypes.MarshalAny(self.Message())
if e != nil {
return
}
e = stream.Send(&pb.ServiceControl{
Command: pb.ServiceControl_INIT,
Config: any,
})
if e != nil {
return
}
c := make(chan types.ServiceControl)
srv.SetCtl(c)
for {
ctl := <-c
stream.Send(&pb.ServiceControl{
Command: pb.ServiceControl_Command(ctl.Command),
})
}
}
/*
* Mutation management
*/
// MutationInit handles establishing the mutation stream
// This just caputures (filtered) mutation events and sends them over the stream
func (s *ModuleAPIServer) MutationInit(sir *pb.ServiceInitRequest, stream pb.ModuleAPI_MutationInitServer) (e error) {
sid := sir.GetId()
echan := make(chan types.Event)
list := NewEventListener("MutationFor:"+sid, types.Event_STATE_MUTATION,
func(e types.Event) bool {
d := e.Data().(*MutationEvent)
if d.Mutation[0] == sid {
return true
}
return false
},
func(v types.Event) error { return ChanSender(v, echan) })
// subscribe our listener
s.schan <- list
for {
v := <-echan
smev := v.Data().(*MutationEvent)
mc := &pb.MutationControl{
Module: smev.Mutation[0],
Id: smev.Mutation[1],
Type: smev.Type,
Cfg: smev.NodeCfg.Message().(*pb.Node),
Dsc: smev.NodeDsc.Message().(*pb.Node),
}
if e := stream.Send(mc); e != nil {
s.Logf(INFO, "mutation stream closed: %v", e)
break
}
}
// politely unsubscribe
list.SetState(types.EventListener_UNSUBSCRIBE)
s.schan <- list
return
}
// EventInit handles establishing the event stream
// This just caputures all events and sends them over the stream
func (s *ModuleAPIServer) EventInit(sir *pb.ServiceInitRequest, stream pb.ModuleAPI_EventInitServer) (e error) {
module := sir.GetModule()
echan := make(chan types.Event)
filterFunction := func(e types.Event) bool {
return true
}
list := NewEventListener("EventFor:"+module, types.Event_ALL,
filterFunction,
func(v types.Event) error { return ChanSender(v, echan) })
// subscribe our listener
s.schan <- list
for {
v := <-echan
var ec = &pb.EventControl{}
switch v.Type() {
case types.Event_STATE_MUTATION:
smev := v.Data().(*MutationEvent)
ec = &pb.EventControl{
Type: pb.EventControl_Mutation,
Event: &pb.EventControl_MutationControl{
MutationControl: &pb.MutationControl{
Module: smev.Mutation[0],
Id: smev.Mutation[1],
Type: smev.Type,
Cfg: smev.NodeCfg.Message().(*pb.Node),
Dsc: smev.NodeDsc.Message().(*pb.Node),
},
},
}
case types.Event_STATE_CHANGE:
scev := v.Data().(*StateChangeEvent)
s.Logf(types.LLDEBUG, "api server got state change event: %+v\n%v", scev, scev.Value)
ec = &pb.EventControl{
Type: pb.EventControl_StateChange,
Event: &pb.EventControl_StateChangeControl{
StateChangeControl: &pb.StateChangeControl{
Type: scev.Type,
Url: scev.URL,
Value: util.ValueToString(scev.Value),
},
},
}
case types.Event_DISCOVERY:
dev := v.Data().(*DiscoveryEvent)
ec = &pb.EventControl{
Type: pb.EventControl_Discovery,
Event: &pb.EventControl_DiscoveryEvent{
DiscoveryEvent: &pb.DiscoveryEvent{
Id: dev.ID,
Url: dev.URL,
ValueId: dev.ValueID,
},
},
}
default:
s.Logf(types.LLERROR, "Couldn't convert Event into mutation, statechange, or discovery: %+v", v)
}
if e := stream.Send(ec); e != nil {
s.Logf(INFO, "event stream closed: %v", e)
break
}
}
// politely unsubscribe
list.SetState(types.EventListener_UNSUBSCRIBE)
s.schan <- list
return
}
// DiscoveryInit handles discoveries from nodes
// This dispatches nodes
func (s *ModuleAPIServer) DiscoveryInit(stream pb.ModuleAPI_DiscoveryInitServer) (e error) {
for {
dc, e := stream.Recv()
if e != nil {
s.Logf(INFO, "discovery stream closed: %v", e)
break
}
dv := &DiscoveryEvent{
ID: dc.GetId(),
URL: dc.GetUrl(),
ValueID: dc.GetValueId(),
}
v := NewEvent(
types.Event_DISCOVERY,
dc.GetUrl(),
dv)
s.EmitOne(v)
}
return
}
// LoggerInit initializes and RPC logger stream
func (s *ModuleAPIServer) LoggerInit(stream pb.ModuleAPI_LoggerInitServer) (e error) {
for {
msg, e := stream.Recv()
if e != nil {
s.Logf(INFO, "logger stream closted: %v", e)
break
}
s.Logf(types.LoggerLevel(msg.Level), "%s:%s", msg.Origin, msg.Msg)
}
return
}
// Run starts the API service listener
func (s *ModuleAPIServer) Run(ready chan<- interface{}) {
s.Log(INFO, "starting API")
srv := grpc.NewServer()
pb.RegisterModuleAPIServer(srv, s)
reflection.Register(srv)
ready <- nil
if e := srv.Serve(s.ulist); e != nil {
s.Logf(CRITICAL, "couldn't start API service: %v", e)
return
}
}
////////////////////////////
// Passthrough Interfaces /
//////////////////////////
/*
* Consume Logger
*/
var _ types.Logger = (*ModuleAPIServer)(nil)
func (s *ModuleAPIServer) Log(level types.LoggerLevel, m string) { s.log.Log(level, m) }
func (s *ModuleAPIServer) Logf(level types.LoggerLevel, fmt string, v ...interface{}) {
s.log.Logf(level, fmt, v...)
}
func (s *ModuleAPIServer) SetModule(name string) { s.log.SetModule(name) }
func (s *ModuleAPIServer) GetModule() string { return s.log.GetModule() }
func (s *ModuleAPIServer) SetLoggerLevel(level types.LoggerLevel) { s.log.SetLoggerLevel(level) }
func (s *ModuleAPIServer) GetLoggerLevel() types.LoggerLevel { return s.log.GetLoggerLevel() }
func (s *ModuleAPIServer) IsEnabledFor(level types.LoggerLevel) bool {
return s.log.IsEnabledFor(level)
}
/*
* Consume an emitter, so we implement EventEmitter directly
*/
var _ types.EventEmitter = (*ModuleAPIServer)(nil)
func (s *ModuleAPIServer) Subscribe(id string, c chan<- []types.Event) error {
return s.em.Subscribe(id, c)
}
func (s *ModuleAPIServer) Unsubscribe(id string) error { return s.em.Unsubscribe(id) }
func (s *ModuleAPIServer) Emit(v []types.Event) { s.em.Emit(v) }
func (s *ModuleAPIServer) EmitOne(v types.Event) { s.em.EmitOne(v) }
func (s *ModuleAPIServer) EventType() types.EventType { return s.em.EventType() }