com.oracle.truffle.js.runtime

Interface PromiseHook

public interface PromiseHook

Provides information about the life-cycle of promises.

Field Summary

Fields

Modifier and Type	Field and Description
static int	TYPE_AFTER PromiseHook with type TYPE_AFTER is called right at the end of the PromiseReactionJob.
static int	TYPE_BEFORE PromiseHook with type TYPE_BEFORE is called at the beginning of the PromiseReactionJob.
static int	TYPE_INIT PromiseHook with type TYPE_INIT is called when a new promise is created.
static int	TYPE_RESOLVE PromiseHook with type TYPE_RESOLVE is called at the beginning of resolve or reject function defined by CreateResolvingFunctions.

Method Summary

Modifier and Type	Method and Description
void	promiseChanged(int changeType, JSDynamicObject promise, JSDynamicObject parentPromise) Invoked for each important change in the life-cycle of a promise.

Field Detail

TYPE_INIT

static final int TYPE_INIT

PromiseHook with type TYPE_INIT is called when a new promise is created.

See Also:

Constant Field Values

TYPE_RESOLVE

static final int TYPE_RESOLVE

PromiseHook with type TYPE_RESOLVE is called at the beginning of resolve or reject function defined by CreateResolvingFunctions.

See Also:

Constant Field Values

TYPE_BEFORE

static final int TYPE_BEFORE

PromiseHook with type TYPE_BEFORE is called at the beginning of the PromiseReactionJob.

See Also:

Constant Field Values

TYPE_AFTER

static final int TYPE_AFTER

PromiseHook with type TYPE_AFTER is called right at the end of the PromiseReactionJob.

See Also:

Constant Field Values

Method Detail

promiseChanged

void promiseChanged(int changeType,
                    JSDynamicObject promise,
                    JSDynamicObject parentPromise)

Invoked for each important change in the life-cycle of a promise.

Parameters:

changeType - type of the change: PromiseHook.TYPE_INIT, PromiseHook.TYPE_RESOLVE, PromiseHook.TYPE_BEFORE or PromiseHook.TYPE_AFTER.

promise - promise being changed.

parentPromise - parent promise when the promise is created (PromiseHook.TYPE_INIT change type) by Promise.then/race/all or AsyncFunctionAwait. The parent promise is undefined in all other cases.