Golang Request.CreateReply方法代碼示例

// Execute the statement(s) in the given request and return a response.
// On error, the returned integer is an HTTP error code.
func (e *Executor) Execute(args driver.Request) (driver.Response, int, error) {
	planMaker := plannerPool.Get().(*planner)
	defer plannerPool.Put(planMaker)

	*planMaker = planner{
		user: args.GetUser(),
		evalCtx: parser.EvalContext{
			NodeID:  e.nodeID,
			ReCache: e.reCache,
			// Copy existing GetLocation closure. See plannerPool.New() for the
			// initial setting.
			GetLocation: planMaker.evalCtx.GetLocation,
		},
		leaseMgr:     e.leaseMgr,
		systemConfig: e.getSystemConfig(),
	}

	// Pick up current session state.
	if err := proto.Unmarshal(args.Session, &planMaker.session); err != nil {
		return args.CreateReply(), http.StatusBadRequest, err
	}
	// Resume a pending transaction if present.
	if planMaker.session.Txn != nil {
		txn := client.NewTxn(e.db)
		txn.Proto = planMaker.session.Txn.Txn
		if planMaker.session.MutatesSystemDB {
			txn.SetSystemDBTrigger()
		}
		planMaker.setTxn(txn, planMaker.session.Txn.Timestamp.GoTime())
	}

	// Send the Request for SQL execution and set the application-level error
	// for each result in the reply.
	planMaker.params = parameters(args.Params)
	reply := e.execStmts(args.Sql, planMaker)

	// Send back the session state even if there were application-level errors.
	// Add transaction to session state.
	if planMaker.txn != nil {
		// TODO(pmattis): Need to record the leases used by a transaction within
		// the transaction state and restore it when the transaction is restored.
		planMaker.releaseLeases(e.db)
		planMaker.session.Txn = &Session_Transaction{Txn: planMaker.txn.Proto, Timestamp: driver.Timestamp(planMaker.evalCtx.TxnTimestamp.Time)}
		planMaker.session.MutatesSystemDB = planMaker.txn.SystemDBTrigger()
	} else {
		planMaker.session.Txn = nil
		planMaker.session.MutatesSystemDB = false
	}
	bytes, err := proto.Marshal(&planMaker.session)
	if err != nil {
		return args.CreateReply(), http.StatusInternalServerError, err
	}
	reply.Session = bytes

	return reply, 0, nil
}

// Execute the statement(s) in the given request and return a response.
// On error, the returned integer is an HTTP error code.
func (e *Executor) Execute(args driver.Request) (driver.Response, int, error) {
	planMaker := &planner{
		user: args.GetUser(),
		evalCtx: parser.EvalContext{
			NodeID:  e.nodeID,
			ReCache: e.reCache,
		},
		leaseMgr:     e.leaseMgr,
		systemConfig: e.getSystemConfig(),
	}

	// Pick up current session state.
	if err := proto.Unmarshal(args.Session, &planMaker.session); err != nil {
		return args.CreateReply(), http.StatusBadRequest, err
	}
	// Resume a pending transaction if present.
	if planMaker.session.Txn != nil {
		txn := client.NewTxn(e.db)
		txn.Proto = planMaker.session.Txn.Txn
		if planMaker.session.MutatesSystemDB {
			txn.SetSystemDBTrigger()
		}
		planMaker.setTxn(txn, planMaker.session.Txn.Timestamp.GoTime())
	}
	planMaker.evalCtx.GetLocation = planMaker.session.getLocation

	// Send the Request for SQL execution and set the application-level error
	// for each result in the reply.
	reply := e.execStmts(args.Sql, parameters(args.Params), planMaker)

	// Send back the session state even if there were application-level errors.
	// Add transaction to session state.
	if planMaker.txn != nil {
		planMaker.session.Txn = &Session_Transaction{Txn: planMaker.txn.Proto, Timestamp: driver.Timestamp(planMaker.evalCtx.TxnTimestamp.Time)}
		planMaker.session.MutatesSystemDB = planMaker.txn.SystemDBTrigger()
	} else {
		planMaker.session.Txn = nil
		planMaker.session.MutatesSystemDB = false
	}
	bytes, err := proto.Marshal(&planMaker.session)
	if err != nil {
		return args.CreateReply(), http.StatusInternalServerError, err
	}
	reply.Session = bytes

	return reply, 0, nil
}

// Execute the statement(s) in the given request and return a response.
// On error, the returned integer is an HTTP error code.
func (e Executor) Execute(args driver.Request) (driver.Response, int, error) {
	planMaker := planner{
		user: args.GetUser(),
		evalCtx: parser.EvalContext{
			NodeID: e.nodeID,
		},
	}
	// Pick up current session state.
	if err := gogoproto.Unmarshal(args.Session, &planMaker.session); err != nil {
		return args.CreateReply(), http.StatusBadRequest, err
	}
	// Open a pending transaction if needed.
	if planMaker.session.Txn != nil {
		txn := client.NewTxn(e.db)
		txn.Proto = *planMaker.session.Txn
		if planMaker.session.MutatesSystemDB {
			txn.SetSystemDBTrigger()
		}
		planMaker.txn = txn
	}

	// Send the Request for SQL execution and set the application-level error
	// for each result in the reply.
	reply := e.execStmts(args.Sql, parameters(args.Params), &planMaker)

	// Send back the session state even if there were application-level errors.
	// Add transaction to session state.
	if planMaker.txn != nil {
		planMaker.session.Txn = &planMaker.txn.Proto
		planMaker.session.MutatesSystemDB = planMaker.txn.SystemDBTrigger()
	} else {
		planMaker.session.Txn = nil
		planMaker.session.MutatesSystemDB = false
	}
	bytes, err := gogoproto.Marshal(&planMaker.session)
	if err != nil {
		return args.CreateReply(), http.StatusInternalServerError, err
	}
	reply.Session = bytes

	return reply, 0, nil
}