Package discord4j.gateway

Interface GatewayObserver

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface GatewayObserver

Event listeners for gateway connection lifecycle.

Field Summary

Fields

Modifier and Type	Field	Description
static final ConnectionObserver.State	CONNECTED	Propagated when a gateway connection has been established.
static final ConnectionObserver.State	DISCONNECTED	Propagated when a gateway connection has been fully closed.
static final ConnectionObserver.State	DISCONNECTED_RESUME	Propagated when a gateway connection has been closed but is still open for a RESUME attempt.
static final GatewayObserver	NOOP_LISTENER
static final ConnectionObserver.State	RETRY_FAILED	Propagated when a reconnection attempt has failed.
static final ConnectionObserver.State	RETRY_RESUME_STARTED	Propagated when a reconnection attempt with RESUME has started.
static final ConnectionObserver.State	RETRY_STARTED	Propagated when a reconnection attempt with IDENTIFY has started.
static final ConnectionObserver.State	RETRY_SUCCEEDED	Propagated when a reconnection attempt has succeeded.
static final ConnectionObserver.State	SEQUENCE	Propagated when the current session sequence value has updated.

Method Summary

Modifier and Type	Method	Description
static GatewayObserver	emptyListener()
void	onStateChange(ConnectionObserver.State newState, GatewayClient client)	React on websocket state change.
default GatewayObserver	then(GatewayObserver other)	Chain together another GatewayObserver.

Field Details

NOOP_LISTENER

static final GatewayObserver NOOP_LISTENER

CONNECTED

static final ConnectionObserver.State CONNECTED

Propagated when a gateway connection has been established.

DISCONNECTED

static final ConnectionObserver.State DISCONNECTED

Propagated when a gateway connection has been fully closed.

DISCONNECTED_RESUME

static final ConnectionObserver.State DISCONNECTED_RESUME

Propagated when a gateway connection has been closed but is still open for a RESUME attempt.

RETRY_RESUME_STARTED

static final ConnectionObserver.State RETRY_RESUME_STARTED

Propagated when a reconnection attempt with RESUME has started.

RETRY_STARTED

static final ConnectionObserver.State RETRY_STARTED

Propagated when a reconnection attempt with IDENTIFY has started.

RETRY_SUCCEEDED

static final ConnectionObserver.State RETRY_SUCCEEDED

Propagated when a reconnection attempt has succeeded.

RETRY_FAILED

static final ConnectionObserver.State RETRY_FAILED

Propagated when a reconnection attempt has failed.

SEQUENCE

static final ConnectionObserver.State SEQUENCE

Propagated when the current session sequence value has updated.

Method Details

emptyListener

static GatewayObserver emptyListener()

onStateChange

void onStateChange(ConnectionObserver.State newState,
 GatewayClient client)

React on websocket state change.

Parameters:

newState - the new state

client - the gateway client observing this change

then

default GatewayObserver then(GatewayObserver other)

Chain together another GatewayObserver.

Parameters:

other - the next GatewayObserver

Returns:

a new composite GatewayObserver