ExponentialWeightedAverageTimeToFirstByteEstimator

Kotlin |Java

@UnstableApi
public final class ExponentialWeightedAverageTimeToFirstByteEstimator implements TimeToFirstByteEstimator

Implementation of TimeToFirstByteEstimator based on exponential weighted average.

Summary

Constants
`static final double`	`DEFAULT_SMOOTHING_FACTOR = 0.85` The default smoothing factor.

Public constructors
`ExponentialWeightedAverageTimeToFirstByteEstimator()` Creates an instance using the `DEFAULT_SMOOTHING_FACTOR`.
`ExponentialWeightedAverageTimeToFirstByteEstimator( double smoothingFactor )` Creates an instance.

Public methods
`long`	`getTimeToFirstByteEstimateUs()` Returns the estimated time to first byte of the response body, in microseconds, or `TIME_UNSET` if no estimate is available.
`void`	`onTransferInitializing(DataSpec dataSpec)` Called when a transfer is being initialized.
`void`	`onTransferStart(DataSpec dataSpec)` Called when a transfer starts.
`void`	`reset()` Resets the estimator.

public static final double DEFAULT_SMOOTHING_FACTOR = 0.85

The default smoothing factor.

public ExponentialWeightedAverageTimeToFirstByteEstimator()

Creates an instance using the DEFAULT_SMOOTHING_FACTOR.

public ExponentialWeightedAverageTimeToFirstByteEstimator(
    double smoothingFactor
)

Creates an instance.

Parameters
`double smoothingFactor`	The exponential weighted average smoothing factor.

public long getTimeToFirstByteEstimateUs()

Returns the estimated time to first byte of the response body, in microseconds, or TIME_UNSET if no estimate is available.

public void onTransferInitializing(DataSpec dataSpec)

Called when a transfer is being initialized.

Parameters
`DataSpec dataSpec`	Describes the data for which the transfer is initialized.

public void onTransferStart(DataSpec dataSpec)

Called when a transfer starts.

Parameters
`DataSpec dataSpec`	Describes the data being transferred.

public void reset()

Resets the estimator.