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Add ability to change Discovery by Processor #36

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e2f2bdf
Add ability to change Discovery by Processor
CarsonLenze Oct 22, 2025
4ac8f48
Ignore my idiocy
CarsonLenze Oct 22, 2025
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6 changes: 6 additions & 0 deletions session/processor.go
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Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,10 @@ type Processor interface {
ProcessClientEncoded(ctx *Context, pk *[]byte)
// ProcessFlush is called before flushing the player's minecraft.Conn buffer in response to a downstream server request.
ProcessFlush(ctx *Context)
// ProcessDiscover is called to determine the primary server to send the player to.
ProcessDiscover(ctx *Context, target *string)
// ProcessDiscoverFallback is called to determine the fallback server to send the player to.
ProcessDiscoverFallback(ctx *Context, target *string)
// ProcessPreTransfer is called before transferring the player to a different server.
ProcessPreTransfer(ctx *Context, origin *string, target *string)
// ProcessTransferFailure is called when the player transfer to a different server fails.
Expand All @@ -63,6 +67,8 @@ func (NopProcessor) ProcessServerEncoded(_ *Context, _ *[]byte) {}
func (NopProcessor) ProcessClient(_ *Context, _ *packet.Packet) {}
func (NopProcessor) ProcessClientEncoded(_ *Context, _ *[]byte) {}
func (NopProcessor) ProcessFlush(_ *Context) {}
func (NopProcessor) ProcessDiscover(_ *Context, target *string) {}
func (NopProcessor) ProcessDiscoverFallback(_ *Context, target *string) {}
func (NopProcessor) ProcessPreTransfer(_ *Context, _ *string, _ *string) {}
func (NopProcessor) ProcessTransferFailure(_ *Context, _ *string, _ *string) {}
func (NopProcessor) ProcessPostTransfer(_ *Context, _ *string, _ *string) {}
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4 changes: 4 additions & 0 deletions session/session.go
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Expand Up @@ -96,6 +96,8 @@ func (s *Session) LoginContext(ctx context.Context) (err error) {
return err
}

s.Processor().ProcessDiscover(NewContext(), &serverAddr)

conn, err := s.dial(ctx, serverAddr)
if err != nil {
s.logger.Debug("dialer failed", "err", err)
Expand Down Expand Up @@ -325,6 +327,8 @@ func (s *Session) fallback() error {
return fmt.Errorf("discovery failed: %w", err)
}

s.Processor().ProcessDiscoverFallback(NewContext(), &addr)

s.logger.Debug("transferring session to a fallback server", "addr", addr)
if err := s.Transfer(addr); err != nil {
return fmt.Errorf("transfer failed: %w", err)
Expand Down