Class GuzzleHttp\Ring\Future\CompletedFutureValue

Returns the result of the future either from cache or by blocking until it is complete.

This method must block until the future has a result or is cancelled. Throwing an exception in the wait() method will mark the future as realized and will throw the exception each time wait() is called. Throwing an instance of GuzzleHttp\Ring\CancelledException will mark the future as realized, will not throw immediately, but will throw the exception if the future's wait() method is called again.

Cancels the future, if possible.

Returns the promise of the deferred.

Transforms a promise's value by applying a function to the promise's fulfillment or rejection value. Returns a new promise for the transformed result.

The then() method registers new fulfilled and rejection handlers with a promise (all parameters are optional):

• $onFulfilled will be invoked once the promise is fulfilled and passed the result as the first argument.
• $onRejected will be invoked once the promise is rejected and passed the reason as the first argument.
• $onProgress (deprecated) will be invoked whenever the producer of the promise triggers progress notifications and passed a single argument (whatever it wants) to indicate progress.

It returns a new promise that will fulfill with the return value of either $onFulfilled or $onRejected, whichever is called, or will reject with the thrown exception if either throws.

A promise makes the following guarantees about handlers registered in the same call to then():

1. Only one of $onFulfilled or $onRejected will be called, never both.
2. $onFulfilled and $onRejected will never be called more than once.
3. $onProgress (deprecated) may be called multiple times.