func StartListener(protoAddr string, app types.Application) (net.Listener, error) {
parts := strings.SplitN(protoAddr, "://", 2)
proto, addr := parts[0], parts[1]
ln, err := net.Listen(proto, addr)
if err != nil {
return nil, err
}
// A goroutine to accept a connection.
go func() {
// semaphore := make(chan struct{}, maxNumberConnections)
for {
// semaphore <- struct{}{}
// Accept a connection
fmt.Println("Waiting for new connection...")
conn, err := ln.Accept()
if err != nil {
Exit("Failed to accept connection")
} else {
fmt.Println("Accepted a new connection")
}
appContext := app.Open()
closeConn := make(chan error, 2) // Push to signal connection closed
responses := make(chan types.Response, 1000) // A channel to buffer responses
// Read requests from conn and deal with them
go handleRequests(appContext, closeConn, conn, responses)
// Pull responses from 'responses' and write them to conn.
go handleResponses(closeConn, responses, conn)
go func() {
// Wait until signal to close connection
errClose := <-closeConn
if errClose != nil {
fmt.Printf("Connection error: %v\n", errClose)
} else {
fmt.Println("Connection was closed.")
}
// Close the connection
err := conn.Close()
if err != nil {
fmt.Printf("Error in closing connection: %v\n", err)
}
// Close the AppContext
err = appContext.Close()
if err != nil {
fmt.Printf("Error in closing app context: %v\n", err)
}
// <-semaphore
}()
}
}()
return ln, nil
}
