mirror of
https://github.com/ChronosX88/go-gun.git
synced 2024-11-08 20:21:01 +00:00
109 lines
2.3 KiB
Go
109 lines
2.3 KiB
Go
package gun
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import (
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"context"
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"sync"
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"time"
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)
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type gunPeer struct {
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url string
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connPeer func() (Peer, error)
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sleepOnErr time.Duration // TODO: would be better as backoff
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id string
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peer Peer
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peerBad bool // If true, don't try anything
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peerLock sync.Mutex
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}
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func newGunPeer(url string, connPeer func() (Peer, error), sleepOnErr time.Duration) (*gunPeer, error) {
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p := &gunPeer{url: url, connPeer: connPeer, sleepOnErr: sleepOnErr}
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var err error
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if p.peer, err = connPeer(); err != nil {
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return nil, err
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}
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return p, nil
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}
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func (g *gunPeer) ID() string { return g.id }
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func (g *gunPeer) reconnectPeer() (err error) {
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g.peerLock.Lock()
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defer g.peerLock.Unlock()
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if g.peer == nil && g.peerBad {
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g.peerBad = false
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if g.peer, err = g.connPeer(); err != nil {
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g.peerBad = true
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time.AfterFunc(g.sleepOnErr, func() { g.reconnectPeer() })
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}
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}
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return
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}
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// Can be nil peer if currently bad
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func (g *gunPeer) connectedPeer() Peer {
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g.peerLock.Lock()
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defer g.peerLock.Unlock()
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return g.peer
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}
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func (g *gunPeer) markPeerErrored(p Peer) {
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g.peerLock.Lock()
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defer g.peerLock.Unlock()
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if p == g.peer {
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g.peer = nil
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g.peerBad = true
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p.Close()
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time.AfterFunc(g.sleepOnErr, func() { g.reconnectPeer() })
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}
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}
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func (g *gunPeer) send(ctx context.Context, msg *Message, moreMsgs ...*Message) (ok bool, err error) {
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p := g.connectedPeer()
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if p == nil {
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return false, nil
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}
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// Clone them with peer "to"
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updatedMsg := msg.Clone()
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updatedMsg.To = g.url
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updatedMoreMsgs := make([]*Message, len(moreMsgs))
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for i, moreMsg := range moreMsgs {
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moreMsg := moreMsg.Clone()
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moreMsg.To = g.url
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updatedMoreMsgs[i] = moreMsg
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}
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if err = p.Send(ctx, updatedMsg, updatedMoreMsgs...); err != nil {
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g.markPeerErrored(p)
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return false, err
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} else {
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return true, nil
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}
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}
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func (g *gunPeer) receive(ctx context.Context) (ok bool, msgs []*Message, err error) {
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if p := g.connectedPeer(); p == nil {
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return false, nil, nil
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} else if msgs, err = p.Receive(ctx); err != nil {
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g.markPeerErrored(p)
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return false, nil, err
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} else {
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return true, msgs, nil
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}
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}
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func (g *gunPeer) Close() error {
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g.peerLock.Lock()
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defer g.peerLock.Unlock()
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err := g.peer.Close()
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g.peer = nil
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g.peerBad = false
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return err
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}
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func (g *gunPeer) closed() bool {
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g.peerLock.Lock()
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defer g.peerLock.Unlock()
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return g.peer == nil && !g.peerBad
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}
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