public TResult Get <TResult>(string key, Func <AcquireContext <string>, TResult> acquire, Func <TResult> fallback, TimeSpan timeout)
{
// When using with arbitrary types, key.ToString() could lead to errors if the key is not string or the ToString() is not properly implemented.
// That's why we only allow string keys here.
try
{
return(_cacheManager.Get(key, ctx =>
{
using (var lockFile = _lockFileManager.AcquireLock(key, timeout))
{
// If we waited for the lock to be released, here the result computed by the locking code should be returned.
return _cacheManager.Get(key, acquire);
}
}));
}
catch (TimeoutException)
{
return(fallback());
}
}
/// <summary>
/// Tries to acquire a lock with the specified parameters
/// </summary>
/// <param name="name">Unique name of the lock</param>
/// <returns>The ILockFile instance on success.</returns>
/// <exception cref="System.TimeoutException">Thrown if the lock couldn't be acquired.</exception>
public static ILockFile AcquireLock(this ILockFileManager lockFileManager, string name)
{
return(lockFileManager.AcquireLock(name, new TimeSpan(0, 0, 0, 4)));
}
