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server.go
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server.go
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package server
import (
"admin"
"api/graphite"
"api/http"
"cluster"
"configuration"
"coordinator"
"datastore"
"time"
"wal"
log "code.google.com/p/log4go"
)
type Server struct {
RaftServer *coordinator.RaftServer
ProtobufServer *coordinator.ProtobufServer
ClusterConfig *cluster.ClusterConfiguration
HttpApi *http.HttpServer
GraphiteApi *graphite.Server
AdminServer *admin.HttpServer
Coordinator coordinator.Coordinator
Config *configuration.Configuration
RequestHandler *coordinator.ProtobufRequestHandler
stopped bool
writeLog *wal.WAL
shardStore *datastore.LevelDbShardDatastore
}
func NewServer(config *configuration.Configuration) (*Server, error) {
log.Info("Opening database at %s", config.DataDir)
shardDb, err := datastore.NewLevelDbShardDatastore(config)
if err != nil {
return nil, err
}
newClient := func(connectString string) cluster.ServerConnection {
return coordinator.NewProtobufClient(connectString, config.ProtobufTimeout.Duration)
}
writeLog, err := wal.NewWAL(config)
if err != nil {
return nil, err
}
clusterConfig := cluster.NewClusterConfiguration(config, writeLog, shardDb, newClient)
raftServer := coordinator.NewRaftServer(config, clusterConfig)
clusterConfig.LocalRaftName = raftServer.GetRaftName()
clusterConfig.SetShardCreator(raftServer)
clusterConfig.CreateFutureShardsAutomaticallyBeforeTimeComes()
coord := coordinator.NewCoordinatorImpl(config, raftServer, clusterConfig)
requestHandler := coordinator.NewProtobufRequestHandler(coord, clusterConfig)
protobufServer := coordinator.NewProtobufServer(config.ProtobufPortString(), requestHandler)
raftServer.AssignCoordinator(coord)
httpApi := http.NewHttpServer(config.ApiHttpPortString(), config.ApiReadTimeout, config.AdminAssetsDir, coord, coord, clusterConfig, raftServer)
httpApi.EnableSsl(config.ApiHttpSslPortString(), config.ApiHttpCertPath)
graphiteApi := graphite.NewServer(config, coord, clusterConfig)
adminServer := admin.NewHttpServer(config.AdminAssetsDir, config.AdminHttpPortString())
return &Server{
RaftServer: raftServer,
ProtobufServer: protobufServer,
ClusterConfig: clusterConfig,
HttpApi: httpApi,
GraphiteApi: graphiteApi,
Coordinator: coord,
AdminServer: adminServer,
Config: config,
RequestHandler: requestHandler,
writeLog: writeLog,
shardStore: shardDb}, nil
}
func (self *Server) ListenAndServe() error {
err := self.RaftServer.ListenAndServe()
if err != nil {
return err
}
log.Info("Waiting for local server to be added")
self.ClusterConfig.WaitForLocalServerLoaded()
self.writeLog.SetServerId(self.ClusterConfig.ServerId())
time.Sleep(5 * time.Second)
go self.ProtobufServer.ListenAndServe()
log.Info("Recovering from log...")
err = self.ClusterConfig.RecoverFromWAL()
if err != nil {
return err
}
log.Info("recovered")
err = self.Coordinator.(*coordinator.CoordinatorImpl).ConnectToProtobufServers(self.Config.ProtobufConnectionString())
if err != nil {
return err
}
log.Info("Starting admin interface on port %d", self.Config.AdminHttpPort)
go self.AdminServer.ListenAndServe()
if self.Config.GraphiteEnabled {
if self.Config.GraphitePort <= 0 || self.Config.GraphiteDatabase == "" {
log.Warn("Cannot start graphite server. please check your configuration")
} else {
log.Info("Starting Graphite Listener on port %d", self.Config.GraphitePort)
go self.GraphiteApi.ListenAndServe()
}
}
// start processing continuous queries
self.RaftServer.StartProcessingContinuousQueries()
log.Info("Starting Http Api server on port %d", self.Config.ApiHttpPort)
self.HttpApi.ListenAndServe()
return nil
}
func (self *Server) Stop() {
if self.stopped {
return
}
log.Info("Stopping server")
self.stopped = true
log.Info("Stopping api server")
self.HttpApi.Close()
log.Info("Api server stopped")
log.Info("Stopping admin server")
self.AdminServer.Close()
log.Info("admin server stopped")
log.Info("Stopping raft server")
self.RaftServer.Close()
log.Info("Raft server stopped")
log.Info("Stopping protobuf server")
self.ProtobufServer.Close()
log.Info("protobuf server stopped")
log.Info("Stopping wal")
self.writeLog.Close()
log.Info("wal stopped")
log.Info("Stopping shard store")
self.shardStore.Close()
log.Info("shard store stopped")
}