/
sitenode_sender.go
185 lines (146 loc) · 3.94 KB
/
sitenode_sender.go
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package federation
import (
"context"
"fmt"
"sync"
"github.com/tg123/phabrik/common"
"github.com/tg123/phabrik/transport"
)
type Dialer func(addr string) (*transport.Client, error)
type cachedConn struct {
parent *SiteNode
partner *PartnerNodeInfo
conn *transport.Client
init sync.Once
close sync.Once
lasterr error
}
func (c *cachedConn) Conn() *transport.Client {
if c.conn != nil {
return c.conn
}
c.init.Do(func() {
conn, err := c.parent.clientDialer(c.partner.Address)
if err != nil {
c.lasterr = err
c.Close()
return
}
conn.SetMessageCallback(c.parent.onMessage)
go func() {
defer c.Close()
conn.Wait()
}()
c.conn = conn
})
return c.conn // maybe nil and will recreate if err
}
func (c *cachedConn) Close() error {
cc, ok := c.parent.connPool.LoadAndDelete(c.partner.Address)
if !ok {
return nil
}
cc.(*cachedConn).close.Do(func() {
tc := cc.(*cachedConn).conn
if tc != nil {
tc.Close()
}
})
return nil
}
func (s *SiteNode) getConn(p *PartnerNodeInfo) (*transport.Client, error) {
c, _ := s.connPool.LoadOrStore(p.Address, &cachedConn{
parent: s,
partner: p,
})
cc := c.(*cachedConn)
return cc.Conn(), cc.lasterr
}
func (s *SiteNode) connectToNode(id NodeID, match bool) (*transport.Client, *PartnerNodeInfo, error) {
t := s.closestPartnerNode(id, func(p PartnerNodeInfo) bool {
if p.Instance.Id == s.instance.Id {
return false
}
return true
})
if (t == nil) || (match && t.Instance.Id != id) {
return nil, nil, fmt.Errorf("%v not found", id)
}
c, err := s.getConn(t)
return c, t, err
}
func (s *SiteNode) appendPartnerInfo(msg *transport.Message) {
// add self
msg.Headers.AppendCustomHeader(transport.MessageHeaderIdTypeFederationPartnerNode, &FederationPartnerNodeHeader{
PartnerNodeInfo: PartnerNodeInfo{
Instance: s.instance,
Address: s.transportServer.Addr().String(),
LeaseAgentAddress: s.leaseAgent.Addr().String(),
Phase: s.phase,
},
})
for _, p := range s.KnownPartnerNodes(func(pn PartnerNodeInfo) bool {
return pn.Instance.InstanceId > 0
}) {
msg.Headers.AppendCustomHeader(transport.MessageHeaderIdTypeFederationPartnerNode, &FederationPartnerNodeHeader{
PartnerNodeInfo: p,
})
}
}
func (s *SiteNode) fillMessageId(message *transport.Message) {
if message.Headers.Id.IsEmpty() {
message.Headers.Id = s.messageIdGenerator.Next()
}
}
func (s *SiteNode) SendOneWay(id NodeID, msg *transport.Message) error {
c, t, err := s.connectToNode(id, true)
if err != nil {
return err
}
s.fillMessageId(msg)
s.appendPartnerInfo(msg)
msg.Headers.SetCustomHeader(transport.MessageHeaderIdTypePToP, &PToPHeader{
From: s.instance,
To: t.Instance,
Actor: PToPActorDirect,
ExactInstance: true,
})
return c.SendOneWay(msg)
}
func (s *SiteNode) Route(ctx context.Context, id NodeID, msg *transport.Message) (*transport.ByteArrayMessage, error) {
c, t, err := s.connectToNode(id, false)
if err != nil {
return nil, err
}
s.fillMessageId(msg)
s.appendPartnerInfo(msg)
msg.Headers.SetCustomHeader(transport.MessageHeaderIdTypePToP, &PToPHeader{
From: s.instance,
To: t.Instance,
Actor: PToPActorRouting,
ExactInstance: false,
})
msg.Headers.SetCustomHeader(transport.MessageHeaderIdTypeRouting, &RoutingHeader{
From: s.instance,
To: t.Instance,
MessageId: msg.Headers.Id,
UseExactRouting: false,
ExpectsReply: true,
Expiration: common.TimeSpanMax,
RetryTimeout: common.TimeSpanMax,
})
msg.Headers.ExpectsReply = true
pr := s.requestTable.Put(msg)
defer pr.Close()
if err := c.SendOneWay(msg); err != nil {
return nil, err
}
reply, err := pr.Wait(ctx)
if err != nil {
return nil, err
}
if reply.Headers.ErrorCode != transport.FabricErrorCodeSuccess {
return reply, fmt.Errorf("reply message contains err header, code: %v", reply.Headers.ErrorCode)
}
return reply, nil
}