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node.go
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node.go
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// Copyright 2019-present Open Networking Foundation.
//
// 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 rsm
import (
protocolapi "github.com/atomix/atomix-api/go/atomix/protocol"
"github.com/atomix/atomix-go-framework/pkg/atomix/cluster"
"github.com/atomix/atomix-go-framework/pkg/atomix/errors"
"github.com/atomix/atomix-go-framework/pkg/atomix/logging"
"github.com/atomix/atomix-go-framework/pkg/atomix/storage/protocol"
"github.com/atomix/atomix-go-framework/pkg/atomix/util"
"google.golang.org/grpc"
)
var log = logging.GetLogger("atomix", "protocol")
// NewNode creates a new node running the given protocol
func NewNode(cluster cluster.Cluster, protocol Protocol) *Node {
return &Node{
Cluster: cluster,
protocol: protocol,
registry: NewRegistry(),
}
}
// Node is an Atomix node
type Node struct {
Cluster cluster.Cluster
protocol Protocol
registry *Registry
}
// RegisterService registers a primitive service
func (n *Node) RegisterService(t ServiceType, f NewServiceFunc) {
n.registry.Register(t, f)
}
// Start starts the node
func (n *Node) Start() error {
log.Info("Starting protocol")
member, ok := n.Cluster.Member()
if !ok {
return errors.NewUnavailable("not a member of the cluster")
}
err := n.protocol.Start(n.Cluster, n.registry)
if err != nil {
return err
}
err = member.Serve(
cluster.WithService(func(server *grpc.Server) {
RegisterPartitionServiceServer(server, &Server{Protocol: n.protocol})
}),
cluster.WithService(func(server *grpc.Server) {
protocolapi.RegisterProtocolConfigServiceServer(server, protocol.NewServer(n.Cluster))
}))
if err != nil {
return err
}
// Set the ready file to indicate startup of the protocol is complete.
ready := util.NewFileReady()
_ = ready.Set()
return nil
}
// Stop stops the node
func (n *Node) Stop() error {
if err := n.protocol.Stop(); err != nil {
return err
}
return n.Cluster.Close()
}