public static AspectF CacheRetry <TReturnType>(this AspectF aspect,
ICache cacheResolver,
ILogger logger,
string key)
{
return(aspect.Combine(work =>
{
try
{
Cache <TReturnType>(aspect, cacheResolver, key, work, cached => cached);
}
catch (Exception x)
{
logger.LogException(x);
System.Threading.Thread.Sleep(1000);
//Retry
try
{
Cache <TReturnType>(aspect, cacheResolver, key, work, cached => cached);
}
catch (Exception ex)
{
logger.LogException(ex);
throw;
}
}
}));
}
public static AspectF RunAsync(this AspectF aspect, Action compAspectFeCallback)
{
return(aspect.Combine(work => work.BeginInvoke(asyncresult =>
{
work.EndInvoke(asyncresult); compAspectFeCallback();
}, null)));
}
private static void Cache <TReturnType>(AspectF aspect, ICache cacheResolver,
string key, Action work, Func <TReturnType, TReturnType> foundInCache)
{
object cachedData = cacheResolver.Get(key);
if (cachedData.IsNull())
{
GetListFromSource <TReturnType>(aspect, cacheResolver, key);
}
else
{
// Give caller a chance to shape the cached item before it is returned
TReturnType cachedType = foundInCache((TReturnType)cachedData);
if (cachedType.IsNull())
{
GetListFromSource <TReturnType>(aspect, cacheResolver, key);
}
else
{
aspect.m_WorkDelegate = new Func <TReturnType>(() => cachedType);
}
}
work();
}
public static AspectF Delay(this AspectF aspect, int milliseconds)
{
return(aspect.Combine(work =>
{
Thread.Sleep(milliseconds);
work();
}));
}
public static TReturnType Use <TReturnType>(this AspectF aspect, TReturnType item, Action <TReturnType> action)
{
return(aspect.Return(() =>
{
action(item);
return item;
}));
}
public static AspectF GreaterOrEqual(this AspectF aspect, string parameterName, int actualValue, int fromValue)
{
if (actualValue < fromValue)
{
throw new Exception(@"{0}({1}) must be greather or equal to {2}".FormatWith(parameterName, actualValue, fromValue));
}
return(aspect);
}
public static AspectF NotNullOrEmpty(this AspectF aspect, string @object, string parameterName)
{
if (@object.IsNullOrEmpty())
{
throw new ArgumentNullException(parameterName);
}
return(aspect);
}
private static void GetListFromSource <TReturnType>(AspectF aspect, ICache cacheResolver, string key)
{
Func <TReturnType> workDelegate = (Func <TReturnType>)aspect.m_WorkDelegate;
TReturnType realObject = workDelegate();
cacheResolver.Add(key, realObject);
workDelegate = () => realObject;
aspect.m_WorkDelegate = workDelegate;
}
public static AspectF GreaterOrEqual(this AspectF aspect, string parameterName, int actualValue, int fromValue)
{
if (actualValue < fromValue)
{
throw new Exception(@"{parameterName}({actualValue}) must be greather or equal to {fromValue}");
}
return(aspect);
}
public static AspectF Log(this AspectF aspect, ILogger logger, string[] categories,
string logMessage, params object[] arg)
{
return(aspect.Combine(work =>
{
logger.Log(categories, logMessage);
work();
}));
}
public static AspectF Log(this AspectF aspect, ILogger logger,
string logMessage, params object[] arg)
{
return(aspect.Combine(work =>
{
logger.Log(string.Format(logMessage, arg));
work();
}));
}
public static AspectF While(this AspectF aspect, Func <bool> test)
{
return(aspect.Combine(work =>
{
while (test())
{
work();
}
}));
}
public static AspectF Timer(this AspectF aspect, string title)
{
return(aspect.Combine(work =>
{
Stopwatch start = Stopwatch.StartNew();
work();
start.Stop();
Console.Out.WriteLine("{0}: {1}", title, start.Elapsed);
}));
}
public static AspectF CacheList <TItemType, TListType>(this AspectF aspect,
ICache cacheResolver, string listCacheKey, Func <TItemType, string> getItemKey)
where TListType : IList <TItemType>, new()
{
return(aspect.Combine(work =>
{
var workDelegate = aspect.WorkDelegate as Func <TListType>;
// Replace the actual work delegate with a new delegate so that
// when the actual work delegate returns a collection, each item
// in the collection is stored in cache individually.
Func <TListType> newWorkDelegate = () =>
{
if (workDelegate != null)
{
TListType collection = workDelegate();
foreach (TItemType item in collection)
{
string key = getItemKey(item);
cacheResolver.Set(key, item);
}
return collection;
}
return default(TListType);
};
aspect.WorkDelegate = newWorkDelegate;
// Get the collection from cache or real source. If collection is returned
// from cache, resolve each item in the collection from cache
Cache <TListType>(aspect, cacheResolver, listCacheKey, work,
cached =>
{
// Get each item from cache. If any of the item is not in cache
// then discard the whole collection from cache and reload the
// collection from source.
var itemList = new TListType();
foreach (object cachedItem in cached.Select(item => cacheResolver.Get(getItemKey(item))))
{
if (null != cachedItem)
{
itemList.Add((TItemType)cachedItem);
}
else
{
// One of the item is missing from cache. So, discard the
// cached list.
return default(TListType);
}
}
return itemList;
});
}));
}
public static AspectF Until(this AspectF aspect, Func <bool> test)
{
return(aspect.Combine(work =>
{
while (!test())
{
;
}
work();
}));
}
public static AspectF WhenTrue(this AspectF aspect, params Func <bool>[] conditions)
{
return(aspect.Combine(work =>
{
if (conditions.Any(condition => !condition()))
{
return;
}
work();
}));
}
public static AspectF Log(this AspectF aspect, ILogger logger,
string beforeMessage, string afterMessage)
{
return(aspect.Combine(work =>
{
logger.Log(beforeMessage);
work();
logger.Log(afterMessage);
}));
}
public static AspectF IgnoreExceptions(this AspectF aspect)
{
return(aspect.Combine(work =>
{
try
{
work();
}
catch
{
}
}));
}
public static AspectF IgnoreException <T>(this AspectF aspect) where T : Exception
{
return(aspect.Combine(work =>
{
try
{
work();
}
catch (T)
{
}
}));
}
private static void GetListFromSource <TReturnType>(AspectF aspect, ICache cacheResolver,
string key)
{
var workDelegate = aspect.WorkDelegate as Func <TReturnType>;
if (workDelegate != null)
{
TReturnType realObject = workDelegate();
cacheResolver.Add(key, realObject);
workDelegate = () => realObject;
}
aspect.WorkDelegate = workDelegate;
}
public static AspectF TrapLog(this AspectF aspect, ILogger logger)
{
return(aspect.Combine(work =>
{
try
{
work();
}
catch (Exception x)
{
logger.LogException(x);
}
}));
}
public static AspectF Expected <TException>(this AspectF aspect)
where TException : Exception
{
return(aspect.Combine(work =>
{
try
{
work();
}
catch (TException x)
{
Debug.WriteLine(x.ToString());
}
}));
}
public static AspectF WriteLock(this AspectF aspect, ReaderWriterLockSlim @lock)
{
return(aspect.Combine(work =>
{
@lock.EnterWriteLock();
try
{
work();
}
finally
{
@lock.ExitWriteLock();
}
}));
}
public static AspectF ReadLockUpgradable(this AspectF aspect, ReaderWriterLockSlim @lock)
{
return(aspect.Combine(work =>
{
@lock.EnterUpgradeableReadLock();
try
{
work();
}
finally
{
@lock.ExitUpgradeableReadLock();
}
}));
}
public static AspectF MustBeNonNull(this AspectF aspect, params object[] args)
{
return(aspect.Combine(work =>
{
for (int i = 0; i < args.Length; i++)
{
object arg = args[i];
if (arg.IsNull())
{
throw new ArgumentException(string.Format("Parameter at index {0} is null", i));
}
}
work();
}));
}
public static AspectF MustBeNonDefault <T>(this AspectF aspect, params T[] args)
where T : IComparable
{
return(aspect.Combine(work =>
{
T defaultvalue = default(T);
for (int i = 0; i < args.Length; i++)
{
T arg = args[i];
if (arg.IsNull() || arg.Equals(defaultvalue))
{
throw new ArgumentException(string.Format("Parameter at index {0} is null", i));
}
}
work();
}));
}
public static AspectF HowLong(this AspectF aspect, ILogger logger,
string startMessage, string endMessage)
{
return(aspect.Combine(work =>
{
DateTime start = DateTime.Now;
logger.Log(startMessage);
work();
DateTime end = DateTime.Now.ToUniversalTime();
TimeSpan duration = end - start;
logger.Log(string.Format(endMessage, duration.TotalMilliseconds,
duration.TotalSeconds, duration.TotalMinutes, duration.TotalHours,
duration.TotalDays));
}));
}
public static AspectF Between(this AspectF aspect, string parameterName, int actualValue, int fromValue, int toValue)
{
if (fromValue > toValue)
{
throw new ArgumentOutOfRangeException(nameof(fromValue), @"From value cannot be less than to value");
}
if (actualValue < fromValue)
{
throw new Exception($"{parameterName}({actualValue}) must be greather or equal to {fromValue}");
}
if (actualValue > toValue)
{
throw new Exception($"{parameterName}({actualValue}) must be less or equal to {toValue}");
}
return(aspect);
}
public static AspectF CacheRetry <TReturnType>(this AspectF aspect,
ICache cacheResolver,
string key)
{
return(aspect.Combine(work =>
{
try
{
Cache <TReturnType>(aspect, cacheResolver, key, work, cached => cached);
}
catch
{
Thread.Sleep(1000);
//Retry
Cache <TReturnType>(aspect, cacheResolver, key, work, cached => cached);
}
}));
}
public static AspectF Between(this AspectF aspect, string parameterName, int actualValue, int fromValue, int toValue)
{
if (fromValue > toValue)
{
throw new ArgumentOutOfRangeException("fromValue", @"From value cannot be less than to value");
}
if (actualValue < fromValue)
{
throw new Exception(@"{0}({1}) must be greather or equal to {2}".FormatWith(parameterName, actualValue, fromValue));
}
if (actualValue > toValue)
{
throw new Exception(@"{0}({1}) must be less or equal to {2}".FormatWith(parameterName, actualValue, toValue));
}
return(aspect);
}
