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service.go
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service.go
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/*
* Copyright 2019 Insolar Technologies
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package logicrunner
import (
"context"
"fmt"
"net"
"net/rpc"
"sync"
"github.com/insolar/insolar/instrumentation/instracer"
"github.com/pkg/errors"
uuid "github.com/satori/go.uuid"
"github.com/insolar/insolar/core"
"github.com/insolar/insolar/core/message"
"github.com/insolar/insolar/core/reply"
"github.com/insolar/insolar/instrumentation/inslogger"
"github.com/insolar/insolar/logicrunner/goplugin/rpctypes"
)
// StartRPC starts RPC server for isolated executors to use
func StartRPC(ctx context.Context, lr *LogicRunner, ps core.PulseStorage) *RPC {
rpcService := &RPC{lr: lr, ps: ps}
rpcServer := rpc.NewServer()
err := rpcServer.Register(rpcService)
if err != nil {
panic("Fail to register LogicRunner RPC Service: " + err.Error())
}
l, e := net.Listen(lr.Cfg.RPCProtocol, lr.Cfg.RPCListen)
if e != nil {
inslogger.FromContext(ctx).Fatal("couldn't setup listener on '"+lr.Cfg.RPCListen+"' over "+lr.Cfg.RPCProtocol+": ", e)
}
lr.sock = l
inslogger.FromContext(ctx).Infof("starting LogicRunner RPC service on %q over %s", lr.Cfg.RPCListen, lr.Cfg.RPCProtocol)
go func() {
rpcServer.Accept(l)
inslogger.FromContext(ctx).Info("LogicRunner RPC service stopped")
}()
return rpcService
}
// RPC is a RPC interface for runner to use for various tasks, e.g. code fetching
type RPC struct {
lr *LogicRunner
ps core.PulseStorage
}
func recoverRPC(err *error) {
if r := recover(); r != nil {
if err != nil {
if *err == nil {
*err = errors.New(fmt.Sprint(r))
} else {
*err = errors.New(fmt.Sprint(*err, r))
}
}
}
}
// GetCode is an RPC retrieving a code by its reference
func (gpr *RPC) GetCode(req rpctypes.UpGetCodeReq, reply *rpctypes.UpGetCodeResp) (err error) {
defer recoverRPC(&err)
os := gpr.lr.MustObjectState(req.Callee)
es := os.MustModeState(req.Mode)
ctx := es.Current.Context
// we don't want to record GetCode messages because of cache
ctx = core.ContextWithMessageBus(ctx, gpr.lr.MessageBus)
inslogger.FromContext(ctx).Debug("In RPC.GetCode ....")
am := gpr.lr.ArtifactManager
ctx, span := instracer.StartSpan(ctx, "service.GetCode")
defer span.End()
codeDescriptor, err := am.GetCode(ctx, req.Code)
if err != nil {
return err
}
reply.Code, err = codeDescriptor.Code()
if err != nil {
return err
}
return nil
}
// MakeBaseMessage makes base of logicrunner event from base of up request
func MakeBaseMessage(req rpctypes.UpBaseReq, es *ExecutionState) message.BaseLogicMessage {
es.nonce++
return message.BaseLogicMessage{
Caller: req.Callee,
CallerPrototype: req.Prototype,
Request: req.Request,
Nonce: es.nonce,
}
}
// RouteCall routes call from a contract to a contract through event bus.
func (gpr *RPC) RouteCall(req rpctypes.UpRouteReq, rep *rpctypes.UpRouteResp) (err error) {
defer recoverRPC(&err)
os := gpr.lr.MustObjectState(req.Callee)
es := os.MustModeState(req.Mode)
ctx := es.Current.Context
bm := MakeBaseMessage(req.UpBaseReq, es)
res, err := gpr.lr.ContractRequester.CallMethod(ctx,
&bm,
!req.Wait,
&req.Object,
req.Method,
req.Arguments,
&req.ProxyPrototype,
)
if err != nil {
return err
}
if req.Wait {
rep.Result = res.(*reply.CallMethod).Result
}
return nil
}
// SaveAsChild is an RPC saving data as memory of a contract as child a parent
func (gpr *RPC) SaveAsChild(req rpctypes.UpSaveAsChildReq, rep *rpctypes.UpSaveAsChildResp) (err error) {
defer recoverRPC(&err)
os := gpr.lr.MustObjectState(req.Callee)
es := os.MustModeState(req.Mode)
ctx := es.Current.Context
bm := MakeBaseMessage(req.UpBaseReq, es)
ref, err := gpr.lr.ContractRequester.CallConstructor(ctx, &bm, false, &req.Prototype, &req.Parent, req.ConstructorName, req.ArgsSerialized, int(message.Child))
rep.Reference = ref
return err
}
// SaveAsDelegate is an RPC saving data as memory of a contract as child a parent
func (gpr *RPC) SaveAsDelegate(req rpctypes.UpSaveAsDelegateReq, rep *rpctypes.UpSaveAsDelegateResp) (err error) {
defer recoverRPC(&err)
os := gpr.lr.MustObjectState(req.Callee)
es := os.MustModeState(req.Mode)
ctx := es.Current.Context
bm := MakeBaseMessage(req.UpBaseReq, es)
ref, err := gpr.lr.ContractRequester.CallConstructor(ctx, &bm, false, &req.Prototype, &req.Into, req.ConstructorName, req.ArgsSerialized, int(message.Delegate))
rep.Reference = ref
return err
}
var iteratorMap = make(map[string]*core.RefIterator)
var iteratorMapLock = sync.RWMutex{}
var iteratorBuffSize = 1000
// GetObjChildrenIterator is an RPC returns an iterator over object children with specified prototype
func (gpr *RPC) GetObjChildrenIterator(
req rpctypes.UpGetObjChildrenIteratorReq,
rep *rpctypes.UpGetObjChildrenIteratorResp,
) (
err error,
) {
defer recoverRPC(&err)
os := gpr.lr.MustObjectState(req.Callee)
es := os.MustModeState(req.Mode)
ctx := es.Current.Context
am := gpr.lr.ArtifactManager
iteratorID := req.IteratorID
iteratorMapLock.RLock()
iterator, ok := iteratorMap[iteratorID]
iteratorMapLock.RUnlock()
if !ok {
newIterator, err := am.GetChildren(ctx, req.Obj, nil)
if err != nil {
return errors.Wrap(err, "[ GetObjChildrenIterator ] Can't get children")
}
id, err := uuid.NewV4()
if err != nil {
return errors.Wrap(err, "[ GetObjChildrenIterator ] Can't generate UUID")
}
iteratorID = id.String()
iteratorMapLock.Lock()
iterator, ok = iteratorMap[iteratorID]
if !ok {
iteratorMap[iteratorID] = &newIterator
iterator = &newIterator
}
iteratorMapLock.Unlock()
}
iter := *iterator
rep.Iterator.ID = iteratorID
rep.Iterator.CanFetch = iter.HasNext()
for len(rep.Iterator.Buff) < iteratorBuffSize && iter.HasNext() {
r, err := iter.Next()
if err != nil {
return errors.Wrap(err, "[ GetObjChildrenIterator ] Can't get Next")
}
rep.Iterator.CanFetch = iter.HasNext()
o, err := am.GetObject(ctx, *r, nil, false)
if err != nil {
if err == core.ErrDeactivated {
continue
}
return errors.Wrap(err, "[ GetObjChildrenIterator ] Can't call GetObject on Next")
}
protoRef, err := o.Prototype()
if err != nil {
return errors.Wrap(err, "[ GetObjChildrenIterator ] Can't get prototype reference")
}
if protoRef.Equal(req.Prototype) {
rep.Iterator.Buff = append(rep.Iterator.Buff, *r)
}
}
if !iter.HasNext() {
iteratorMapLock.Lock()
delete(iteratorMap, rep.Iterator.ID)
iteratorMapLock.Unlock()
}
return nil
}
// GetDelegate is an RPC saving data as memory of a contract as child a parent
func (gpr *RPC) GetDelegate(req rpctypes.UpGetDelegateReq, rep *rpctypes.UpGetDelegateResp) (err error) {
defer recoverRPC(&err)
os := gpr.lr.MustObjectState(req.Callee)
es := os.MustModeState(req.Mode)
ctx := es.Current.Context
am := gpr.lr.ArtifactManager
ref, err := am.GetDelegate(ctx, req.Object, req.OfType)
if err != nil {
return err
}
rep.Object = *ref
return nil
}
// DeactivateObject is an RPC saving data as memory of a contract as child a parent
func (gpr *RPC) DeactivateObject(req rpctypes.UpDeactivateObjectReq, rep *rpctypes.UpDeactivateObjectResp) (err error) {
defer recoverRPC(&err)
os := gpr.lr.MustObjectState(req.Callee)
es := os.MustModeState(req.Mode)
es.deactivate = true
return nil
}