// sent.
func (enc *Encoder) sendTypeDescriptor(w io.Writer, state *encoderState, ut *userTypeInfo) {
	// Make sure the type is known to the other side.
	// First, have we already sent this type?
	rt := ut.base
	if ut.externalEnc != 0 {
		rt = ut.user
	}
	if _, alreadySent := enc.sent[rt]; !alreadySent {
		// No, so send it.
		sent := enc.sendType(w, state, rt)
		if enc.err != nil {

        ex << [
            new SocketException("something went wrong"),
            new SocketTimeoutException("something went wrong"),
            new HttpHostConnectException(new IOException("something went wrong"), null, null),
            new HttpErrorStatusCodeException("something", "something", 503, "something"),
            new RuntimeException("with cause", new SocketTimeoutException("something went wrong"))
        ]
    }

	// send ack so the server doesn't wait for us.
	sendAck(ztunClient)

	// second message should be the snap sent message
	m, fds = readRequest(t, ztunClient)
	assert.Equal(t, len(fds), 0)

	sent := m.Payload.(*zdsapi.WorkloadRequest_SnapshotSent).SnapshotSent
	if sent == nil {
		panic("expected snapshot sent")
	}
	sendAck(ztunClient)
	ztunClient.Close()
	// this will retry for a bit, so shouldn't flake

NAME       CLUSTER      CDS       LDS        EDS        RDS          ECDS         ISTIOD      VERSION
proxy1     cluster1     STALE     SYNCED     SYNCED     NOT SENT     NOT SENT     istiod1     1.20

proxy1     cluster1     STALE        SYNCED      SYNCED      NOT SENT     SYNCED       istiod1     1.20
proxy2     cluster2     STALE        SYNCED      STALE       SYNCED       STALE        istiod2     1.19
proxy3     cluster3     NOT SENT     ERROR       STALE       NOT SENT     NOT SENT     istiod3     1.20

// Keep workload that we can't find in the fd cache. This can only be sent before SnapshotSent is sent
// to signal ztunnel to not delete the workload if it has it.
message KeepWorkload {
  string uid = 1;
}

// Delete a workload from the ztunnel. Ztunnel should shutdown the workload's proxy.
message DelWorkload {
  string uid = 2;
}

// Let ztunnel know that a full snapshot was sent. Ztunnel should reconcile its internal state

        "NoHttpResponseException"                                   | new NoHttpResponseException("something went wrong")
        "ConnectionClosedException"                                 | new ConnectionClosedException("something went wrong")
        "HttpHostConnectException"                                  | new HttpHostConnectException(new IOException("something went wrong"), null, null)

        return {"message": "Notification sent in the background"}
    ```
    """

    def add_task(
        self,
        func: Annotated[
            Callable[P, Any],
            Doc(
                """
                The function to call after the response is sent.

                It can be a regular `def` function or an `async def` function.
                """

	// We must use a buffered channel or risk missing the signal
	// if we're not ready to receive when the signal is sent.
	c := make(chan os.Signal, 1)

	// Passing no signals to Notify means that
	// all signals will be sent to the channel.
	signal.Notify(c)

	// Block until any signal is received.
	s := <-c
	fmt.Println("Got signal:", s)

OkHttp Server-Sent Events
=========================

Experimental support for server-sent events.
API is not considered stable and may change at any time.

### Download

```kotlin
testImplementation("com.squareup.okhttp3:okhttp-sse:4.12.0")