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namespace Nop.Core.Caching;
public partial interface ILocker
{
/// <summary>
/// Performs some asynchronous task with exclusive lock
/// </summary>
/// <param name="resource">The key we are locking on</param>
/// <param name="expirationTime">The time after which the lock will automatically be expired</param>
/// <param name="action">Asynchronous task to be performed with locking</param>
/// <returns>A task that resolves true if lock was acquired and action was performed; otherwise false</returns>
Task<bool> PerformActionWithLockAsync(string resource, TimeSpan expirationTime, Func<Task> action);
/// <summary>
/// Starts a background task with "heartbeat": a status flag that will be periodically updated to signal to
/// others that the task is running and stop them from starting the same task.
/// </summary>
/// <param name="key">The key of the background task</param>
/// <param name="expirationTime">The time after which the heartbeat key will automatically be expired. Should be longer than <paramref name="heartbeatInterval"/></param>
/// <param name="heartbeatInterval">The interval at which to update the heartbeat, if required by the implementation</param>
/// <param name="action">Asynchronous background task to be performed</param>
/// <param name="cancellationTokenSource">A CancellationTokenSource for manually canceling the task</param>
/// <returns>A task that resolves true if lock was acquired and action was performed; otherwise false</returns>
Task RunWithHeartbeatAsync(string key, TimeSpan expirationTime, TimeSpan heartbeatInterval, Func<CancellationToken, Task> action, CancellationTokenSource cancellationTokenSource = default);
/// <summary>
/// Tries to cancel a background task by flagging it for cancellation on the next heartbeat.
/// </summary>
/// <param name="key">The task's key</param>
/// <param name="expirationTime">The time after which the task will be considered stopped due to system shutdown or other causes,
/// even if not explicitly canceled.</param>
/// <returns>A task that represents requesting cancellation of the task. Note that the completion of this task does not
/// necessarily imply that the task has been canceled, only that cancellation has been requested.</returns>
Task CancelTaskAsync(string key, TimeSpan expirationTime);
/// <summary>
/// Check if a background task is running.
/// </summary>
/// <param name="key">The task's key</param>
/// <returns>A task that resolves to true if the background task is running; otherwise false</returns>
Task<bool> IsTaskRunningAsync(string key);
}