/// <summary>
///
/// </summary>
/// <param name="key"></param>
public void Lock(object key)
{
Log.Debug("acquiring cache lock: regionName='{0}', key='{1}'", RegionName, key);
LockData lockData = null;
try
{
var lockKey = CacheNamespace.GetLockKey(key);
var shouldRetry = _options.AcquireLockRetryStrategy.GetShouldRetry();
var wasLockAcquired = false;
var shouldTryAcquireLock = true;
while (shouldTryAcquireLock)
{
lockData = new LockData(
key: Convert.ToString(key),
lockKey: lockKey,
// Recalculated each attempt to ensure a unique value.
lockValue: _options.LockValueFactory.GetLockValue()
);
if (TryAcquireLock(lockData))
{
wasLockAcquired = true;
shouldTryAcquireLock = false;
}
else
{
var shouldRetryArgs = new ShouldRetryAcquireLockArgs(
RegionName, lockData.Key, lockData.LockKey,
lockData.LockValue, _lockTimeout, _acquireLockTimeout
);
shouldTryAcquireLock = shouldRetry(shouldRetryArgs);
}
}
if (!wasLockAcquired)
{
var lockFailedArgs = new LockFailedEventArgs(
RegionName, key, lockKey,
_lockTimeout, _acquireLockTimeout
);
_options.OnLockFailed(this, lockFailedArgs);
}
}
catch (Exception e)
{
Log.Error("could not acquire cache lock: regionName='{0}', key='{1}'", RegionName, key);
var evtArg = new ExceptionEventArgs(RegionName, RedisCacheMethod.Lock, e);
_options.OnException(this, evtArg);
if (evtArg.Throw)
{
throw new RedisCacheException(RegionName, "Failed to lock item in cache. See inner exception.", e);
}
}
}
internal void OnLockFailed(RedisCache sender, LockFailedEventArgs e)
{
var onLockFailed = LockFailed;
if (onLockFailed == null)
{
throw new TimeoutException(
String.Format("Acquiring lock for '{0}' exceeded timeout '{1}'.", e.Key, e.AcquireLockTimeout)
);
}
else
{
onLockFailed(sender, e);
}
}
public virtual void Lock(object key)
{
log.DebugFormat("acquiring cache lock: regionName='{0}', key='{1}'", RegionName, key);
try
{
var lockKey = CacheNamespace.GetLockKey(key);
var shouldRetry = options.AcquireLockRetryStrategy.GetShouldRetry();
var wasLockAcquired = false;
var shouldTryAcquireLock = true;
while (shouldTryAcquireLock)
{
var lockData = new LockData(
key: Convert.ToString(key),
lockKey: lockKey,
// Recalculated each attempt to ensure a unique value.
lockValue: options.LockValueFactory.GetLockValue()
);
if (TryAcquireLock(lockData))
{
wasLockAcquired = true;
shouldTryAcquireLock = false;
}
else
{
var shouldRetryArgs = new ShouldRetryAcquireLockArgs(
RegionName, lockData.Key, lockData.LockKey,
lockData.LockValue, lockTimeout, acquireLockTimeout
);
shouldTryAcquireLock = shouldRetry(shouldRetryArgs);
}
}
if (!wasLockAcquired)
{
var lockFailedArgs = new LockFailedEventArgs(
RegionName, key, lockKey,
lockTimeout, acquireLockTimeout
);
options.OnLockFailed(this, lockFailedArgs);
}
}
catch (Exception e)
{
log.ErrorFormat("could not acquire cache lock: regionName='{0}', key='{1}'", RegionName, key);
var evtArg = new ExceptionEventArgs(RegionName, RedisCacheMethod.Lock, e);
options.OnException(this, evtArg);
if (evtArg.Throw)
{
throw new RedisCacheException(RegionName, "Failed to lock item in cache. See inner exception.", e);
}
}
}
internal void OnLockFailed(RedisCache sender, LockFailedEventArgs e)
{
var onLockFailed = LockFailed;
if (onLockFailed == null)
{
throw new TimeoutException(
String.Format("Acquiring lock for '{0}' exceeded timeout '{1}'.", e.Key, e.AcquireLockTimeout)
);
}
else
{
onLockFailed(sender, e);
}
}
private async Task LockCoreAsync(object key, CancellationToken cancellationToken, bool sync = false)
{
cancellationToken.ThrowIfNull("cancellationToken");
if (cancellationToken.IsCancellationRequested)
{
return;
}
log.Debug("acquiring cache lock: regionName='{0}', key='{1}'", RegionName, key);
try
{
var lockKey = CacheNamespace.GetLockKey(key);
var shouldRetry = options.AcquireLockRetryStrategy.GetShouldRetry();
var wasLockAcquired = false;
var shouldTryAcquireLock = true;
while (shouldTryAcquireLock)
{
var lockData = new LockData(
key: Convert.ToString(key),
lockKey: lockKey,
// Recalculated each attempt to ensure a unique value.
lockValue: options.LockValueFactory.GetLockValue()
);
bool lockAquired = sync
? this.TryAcquireLockAsync(lockData, true).ConfigureAwait(false).GetAwaiter().GetResult()
: await this.TryAcquireLockAsync(lockData);
if (lockAquired)
{
wasLockAcquired = true;
shouldTryAcquireLock = false;
}
else
{
var shouldRetryArgs = new ShouldRetryAcquireLockArgs(
RegionName, lockData.Key, lockData.LockKey,
lockData.LockValue, lockTimeout, acquireLockTimeout
);
shouldTryAcquireLock = shouldRetry(shouldRetryArgs);
}
}
if (!wasLockAcquired)
{
var lockFailedArgs = new LockFailedEventArgs(
RegionName, key, lockKey,
lockTimeout, acquireLockTimeout
);
options.OnLockFailed(this, lockFailedArgs);
}
}
catch (Exception e)
{
log.Error("could not acquire cache lock: regionName='{0}', key='{1}'", RegionName, key);
var evtArg = new ExceptionEventArgs(RegionName, RedisCacheMethod.Lock, e);
options.OnException(this, evtArg);
if (evtArg.Throw)
{
throw new RedisCacheException(RegionName, "Failed to lock item in cache. See inner exception.", e);
}
}
}