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lrpc/server/context.go
2022-05-01 01:39:22 -07:00

54 lines
1.1 KiB
Go

package server
import (
"go.arsenm.dev/lrpc/codec"
"github.com/gofrs/uuid"
)
// Context is a connection context for RPC calls
type Context struct {
isChannel bool
channelID string
channel chan any
codec codec.Codec
doneCh chan struct{}
}
// MakeChannel changes the function it's called in into a
// channel function, and returns a channel which can be used
// to send information to the client.
//
// This will ovewrite any return value of the function with
// a channel ID.
func (ctx *Context) MakeChannel() (chan<- any, error) {
ctx.isChannel = true
chID, err := uuid.NewV4()
ctx.channelID = chID.String()
ctx.channel = make(chan any, 5)
return ctx.channel, err
}
// GetCodec returns a codec bound to the connection
// that called this function
func (ctx *Context) GetCodec() codec.Codec {
return ctx.codec
}
// Done returns a channel that will be closed when
// the context is canceled, such as when ChannelDone
// is called by the client
func (ctx *Context) Done() <-chan struct{} {
return ctx.doneCh
}
// Cancel cancels the context
func (ctx *Context) Cancel() {
close(ctx.doneCh)
if ctx.channel != nil {
close(ctx.channel)
}
}