pointer and ping misses

synced-pool.go

@@ -55,9 +55,10 @@ type Quorum interface {
 }
 
 type RemoteHost struct {
-	Host       string
-	Pool       *RemoteGrainPool
-	connection net.Conn
+	Host        string
+	MissedPings int
+	Pool        *RemoteGrainPool
+	connection  net.Conn
 }
 
 type SyncedPool struct {
@@ -65,7 +66,7 @@ type SyncedPool struct {
 	listener    net.Listener
 	Hostname    string
 	local       *GrainLocalPool
-	remotes     []RemoteHost
+	remotes     []*RemoteHost
 	remoteIndex map[CartId]*RemoteGrainPool
 }
 
@@ -81,7 +82,7 @@ func NewSyncedPool(local *GrainLocalPool, hostname string, d Discovery) (*Synced
 		Hostname:    hostname,
 		local:       local,
 		listener:    l,
-		remotes:     make([]RemoteHost, 0),
+		remotes:     make([]*RemoteHost, 0),
 		remoteIndex: make(map[CartId]*RemoteGrainPool),
 	}
 	if d != nil {
@@ -126,6 +127,13 @@ func NewSyncedPool(local *GrainLocalPool, hostname string, d Discovery) (*Synced
 					log.Printf("Error adding undiscovered remote %s: %v\n", h, err)
 				}
 			}
+			for _, r := range pool.remotes {
+				err := DoPing(r.connection)
+				if err != nil {
+					r.MissedPings++
+					log.Printf("Error pinging remote %s: %v\n, missed pings: %d", r.Host, err, r.MissedPings)
+				}
+			}
 		}()
 	}
 	go func() {
@@ -324,7 +332,7 @@ func (p *SyncedPool) AddRemoteWithConnection(address string, connection net.Conn
 		Pool:       pool,
 		Host:       address,
 	}
-	return p.addRemoteHost(address, remote)
+	return p.addRemoteHost(address, &remote)
 }
 
 func DoPing(connection net.Conn) error {
@@ -341,7 +349,7 @@ func DoPing(connection net.Conn) error {
 	return nil
 }
 
-func (p *SyncedPool) addRemoteHost(address string, remote RemoteHost) error {
+func (p *SyncedPool) addRemoteHost(address string, remote *RemoteHost) error {
 	for _, r := range p.remotes {
 		if r.Host == address {
 			log.Printf("Remote %s already exists\n", address)
@@ -376,7 +384,7 @@ func (p *SyncedPool) AddRemote(address string) error {
 		Host:       address,
 	}
 
-	return p.addRemoteHost(address, remote)
+	return p.addRemoteHost(address, &remote)
 }
 
 func (p *SyncedPool) Process(id CartId, messages ...Message) ([]byte, error) {