Class DataWatcher

A Watcher implementation, that can monitor and signal changes of one or more data locations by raising the Changed event.

Inheritance

System.Object

Watcher

DataWatcher

Implements

System.IDisposable

Inherited Members

Watcher.Changed

Watcher.UtcLastModified

Watcher.UtcLastSignaled

Watcher.DueTime

Watcher.Period

Watcher.DueTimeOnChanged

Watcher.ChangeSignaling(TimeSpan)

Watcher.ChangeSignaling(TimeSpan, TimeSpan)

Watcher.SetUtcLastModified(DateTime)

Watcher.OnChangedRaised()

Watcher.OnChangedRaised(WatcherEventArgs)

Watcher.Dispose(Boolean)

Watcher.Dispose()

Namespace: Cuemon.Data

Assembly: Cuemon.Data.dll

Syntax

public sealed class DataWatcher : Watcher, IDisposable

Constructors

DataWatcher(DataManager, IDataCommand, DbParameter[])

Initializes a new instance of the DataWatcher class.

Declaration

public DataWatcher(DataManager manager, IDataCommand command, params DbParameter[] parameters)

Parameters

Type	Name	Description
DataManager	manager	The DataManager to be used for the underlying data operations.
IDataCommand	command	The IDataCommand to execute and monitor for changes.
System.Data.Common.DbParameter[]	parameters	An optional sequence of System.Data.Common.DbParameter to use with the associated command.

Remarks

Monitors the provided command for changes in an interval of two minutes using a MD5 hash check on the query result. The signaling is default delayed 15 seconds before first invoke.

DataWatcher(DataManager, IDataCommand, TimeSpan, DbParameter[])

Initializes a new instance of the DataWatcher class.

Declaration

public DataWatcher(DataManager manager, IDataCommand command, TimeSpan period, params DbParameter[] parameters)

Parameters

Type	Name	Description
DataManager	manager	The DataManager to be used for the underlying data operations.
IDataCommand	command	The IDataCommand to execute and monitor for changes.
System.TimeSpan	period	The time interval between periodic signaling for changes of the provided command.
System.Data.Common.DbParameter[]	parameters	An optional array of System.Data.Common.DbParameter to use with the associated command.

Remarks

Monitors the provided command for changes in an interval specified by period using a MD5 hash check on the query result. The signaling is default delayed 15 seconds before first invoke.

DataWatcher(DataManager, IDataCommand, TimeSpan, TimeSpan, TimeSpan, DbParameter[])

Initializes a new instance of the DataWatcher class.

Declaration

public DataWatcher(DataManager manager, IDataCommand command, TimeSpan dueTime, TimeSpan period, TimeSpan dueTimeOnChanged, params DbParameter[] parameters)

Parameters

Type	Name	Description
DataManager	manager	The DataManager to be used for the underlying data operations.
IDataCommand	command	The IDataCommand to execute and monitor for changes.
System.TimeSpan	dueTime	The amount of time to delay before the associated Watcher starts signaling. Specify negative one (-1) milliseconds to prevent the signaling from starting. Specify zero (0) to start the signaling immediately.
System.TimeSpan	period	The time interval between periodic signaling for changes of the provided command.
System.TimeSpan	dueTimeOnChanged	The amount of time to postpone a Changed event. Specify zero (0) to disable postponing.
System.Data.Common.DbParameter[]	parameters	An optional array of System.Data.Common.DbParameter to use with the associated command.

Remarks

Monitors the provided command for changes in an interval specified by period using a MD5 hash check on the query result.

Properties

Command

Gets the associated IDataCommand of this DataWatcher.

Declaration

public IDataCommand Command { get; }

Property Value

Type	Description
IDataCommand	The associated IDataCommand of this DataWatcher.

Manager

Gets the associated DataManager of this DataWatcher.

Declaration

public DataManager Manager { get; }

Property Value

Type	Description
DataManager	The associated DataManager of this DataWatcher.

Parameters

Gets the associated array of System.Data.Common.DbParameter of this DataWatcher.

Declaration

public DbParameter[] Parameters { get; }

Property Value

Type	Description
System.Data.Common.DbParameter[]	The associated array of System.Data.Common.DbParameter of this DataWatcher.

Methods

HandleSignaling()

Handles the signaling of this DataWatcher.

Declaration

protected override void HandleSignaling()

Overrides

Watcher.HandleSignaling()

Implements

System.IDisposable

Extension Methods

ConverterExtensions.ParseWith<TSource, TResult>(TSource, Func<TSource, TResult>)

ConverterExtensions.ParseWith<TSource, T, TResult>(TSource, Func<TSource, T, TResult>, T)

ConverterExtensions.ParseWith<TSource, T1, T2, TResult>(TSource, Func<TSource, T1, T2, TResult>, T1, T2)

ConverterExtensions.ParseWith<TSource, T1, T2, T3, TResult>(TSource, Func<TSource, T1, T2, T3, TResult>, T1, T2, T3)

ConverterExtensions.ParseWith<TSource, T1, T2, T3, T4, TResult>(TSource, Func<TSource, T1, T2, T3, T4, TResult>, T1, T2, T3, T4)

ConverterExtensions.ParseWith<TSource, T1, T2, T3, T4, T5, TResult>(TSource, Func<TSource, T1, T2, T3, T4, T5, TResult>, T1, T2, T3, T4, T5)

ConverterExtensions.ParseWith<TSource, T1, T2, T3, T4, T5, T6, TResult>(TSource, Func<TSource, T1, T2, T3, T4, T5, T6, TResult>, T1, T2, T3, T4, T5, T6)

ConverterExtensions.ParseWith<TSource, T1, T2, T3, T4, T5, T6, T7, TResult>(TSource, Func<TSource, T1, T2, T3, T4, T5, T6, T7, TResult>, T1, T2, T3, T4, T5, T6, T7)

ConverterExtensions.ParseWith<TSource, T1, T2, T3, T4, T5, T6, T7, T8, TResult>(TSource, Func<TSource, T1, T2, T3, T4, T5, T6, T7, T8, TResult>, T1, T2, T3, T4, T5, T6, T7, T8)

ConverterExtensions.ParseWith<TSource, T1, T2, T3, T4, T5, T6, T7, T8, T9, TResult>(TSource, Func<TSource, T1, T2, T3, T4, T5, T6, T7, T8, T9, TResult>, T1, T2, T3, T4, T5, T6, T7, T8, T9)

ConverterExtensions.As<TResult>(Object)

ConverterExtensions.As<TResult>(Object, TResult)

ConverterExtensions.As<TResult>(Object, TResult, IFormatProvider)

DelegateUtilityExtensions.Wrap<TResult>(TResult)

DelegateUtilityExtensions.DynamicWrap<TResult>(TResult)

TweakerExtensions.Adjust<T>(T, Func<T, T>)

TypeUtilityExtensions.Is<T>(Object)

TypeUtilityExtensions.IsNot<T>(Object)

TypeUtilityExtensions.IsNullable<T>(T)

WrapperExtensions.UseWrapper<T>(T, Action<IDictionary<String, Object>>)

WrapperExtensions.UseWrapper<T>(T, MemberInfo, Action<IDictionary<String, Object>>)

EnumerableUtilityExtensions.Yield<TSource>(TSource)

HashUtilityExtensions.ComputeHash(Object, Action<HashOptions>)

HmacUtilityExtensions.ComputeKeyedHash(Object, Byte[], Action<KeyedHashOptions>)