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Feature: Repository Monitor

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Cached Job Index, Live Job Message Update
This commit is contained in:
Gary Sharp
2013-04-11 19:10:38 +10:00
parent b5531e64bd
commit b79723d432
34 changed files with 803 additions and 262 deletions
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Disco.Data/Disco.Data.csproj
+16 -1
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@@ -49,6 +49,18 @@
<Reference Include="System.Core" />
<Reference Include="System.Data.Entity" />
<Reference Include="System.Drawing" />
<Reference Include="System.Reactive.Core">
<HintPath>..\packages\Rx-Core.2.1.30214.0\lib\Net45\System.Reactive.Core.dll</HintPath>
</Reference>
<Reference Include="System.Reactive.Interfaces">
<HintPath>..\packages\Rx-Interfaces.2.1.30214.0\lib\Net45\System.Reactive.Interfaces.dll</HintPath>
</Reference>
<Reference Include="System.Reactive.Linq">
<HintPath>..\packages\Rx-Linq.2.1.30214.0\lib\Net45\System.Reactive.Linq.dll</HintPath>
</Reference>
<Reference Include="System.Reactive.PlatformServices">
<HintPath>..\packages\Rx-PlatformServices.2.1.30214.0\lib\Net45\System.Reactive.PlatformServices.dll</HintPath>
</Reference>
<Reference Include="System.Web" />
<Reference Include="System.Xml.Linq" />
<Reference Include="System.Data.DataSetExtensions" />
@@ -109,6 +121,9 @@
<Compile Include="Repository\DiscoDataContext.cs" />
<Compile Include="Repository\DiscoDataContextInitializer.cs" />
<Compile Include="Repository\DiscoDataSeeder.cs" />
<Compile Include="Repository\Monitor\RepositoryMonitor.cs" />
<Compile Include="Repository\Monitor\RepositoryMonitorEvent.cs" />
<Compile Include="Repository\Monitor\RepositoryMonitorEventType.cs" />
</ItemGroup>
<ItemGroup>
<None Include="App.config">
@@ -144,7 +159,7 @@
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
<ProjectExtensions>
<VisualStudio>
<UserProperties BuildVersion_UpdateFileVersion="True" BuildVersion_UpdateAssemblyVersion="True" BuildVersion_BuildVersioningStyle="None.DeltaBaseYear.MonthAndDayStamp.TimeStamp" BuildVersion_StartDate="2011/7/1" BuildVersion_DetectChanges="False" BuildVersion_UseGlobalSettings="False" BuildVersion_BuildAction="Both" />
<UserProperties BuildVersion_BuildAction="Both" BuildVersion_UseGlobalSettings="False" BuildVersion_DetectChanges="False" BuildVersion_StartDate="2011/7/1" BuildVersion_BuildVersioningStyle="None.DeltaBaseYear.MonthAndDayStamp.TimeStamp" BuildVersion_UpdateAssemblyVersion="True" BuildVersion_UpdateFileVersion="True" />
</VisualStudio>
</ProjectExtensions>
<Import Project="$(SolutionDir)\.nuget\nuget.targets" />
Disco.Data/Properties/AssemblyInfo.cs
+2 -2
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@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
// You can specify all the values or you can default the Build and Revision Numbers
// by using the '*' as shown below:
// [assembly: AssemblyVersion("1.0.*")]
[assembly: AssemblyVersion("1.2.0405.1309")]
[assembly: AssemblyFileVersion("1.2.0405.1309")]
[assembly: AssemblyVersion("1.2.0411.1908")]
[assembly: AssemblyFileVersion("1.2.0411.1908")]
Disco.Data/Repository/DiscoDataContext.cs
+19
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@@ -68,5 +68,24 @@ namespace Disco.Data.Repository
modelBuilder.Entity<DeviceProfile>().Property(DeviceProfile.PropertyAccessExpressions.DistributionTypeDb);
}
// Hook for Repository Monitor
public override int SaveChanges()
{
int changeCount = 0;
// Notify before changes are committed
var changes = Monitor.RepositoryMonitor.BeforeSaveChanges(this);
changeCount = base.SaveChanges();
if (changes.Length > 0)
{
// Notify after changes are committed
Monitor.RepositoryMonitor.AfterSaveChanges(this, changes);
}
return changeCount;
}
}
}
Disco.Data/Repository/Monitor/RepositoryMonitor.cs
+133
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@@ -0,0 +1,133 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Reactive;
using System.Reactive.Subjects;
using System.Data.Entity.Infrastructure;
using System.Collections.Concurrent;
using System.Data.Objects;
namespace Disco.Data.Repository.Monitor
{
public static class RepositoryMonitor
{
private static Subject<RepositoryMonitorEvent> streamBefore = new Subject<RepositoryMonitorEvent>();
private static Subject<RepositoryMonitorEvent> streamAfter = new Subject<RepositoryMonitorEvent>();
private static ConcurrentDictionary<Type, Type> entityProxyTypeCache = new ConcurrentDictionary<Type, Type>();
public static Subject<RepositoryMonitorEvent> StreamBeforeCommit { get { return streamBefore; } }
public static Subject<RepositoryMonitorEvent> StreamAfterCommit { get { return streamAfter; } }
internal static RepositoryMonitorEvent[] BeforeSaveChanges(DiscoDataContext dbContext)
{
var contextStateManager = ((IObjectContextAdapter)dbContext).ObjectContext.ObjectStateManager;
//var changes = contextStateManager.GetObjectStateEntries(System.Data.EntityState.Added).Concat(contextStateManager.GetObjectStateEntries(System.Data.EntityState.Deleted)).Concat(contextStateManager.GetObjectStateEntries(System.Data.EntityState.Modified));
dbContext.ChangeTracker.DetectChanges();
var events = dbContext.ChangeTracker.Entries().Where(e => e.State != System.Data.EntityState.Unchanged && e.State != System.Data.EntityState.Detached).Select(entryState =>
{
var monitorEvent = EventFromEntryState(dbContext, entryState, contextStateManager.GetObjectStateEntry(entryState.Entity));
// Push to Stream
streamBefore.OnNext(monitorEvent);
return monitorEvent;
}).ToArray();
return events;
}
internal static void AfterSaveChanges(DiscoDataContext dbContext, IEnumerable<RepositoryMonitorEvent> changes)
{
var contextStateManager = ((IObjectContextAdapter)dbContext).ObjectContext.ObjectStateManager;
foreach (var change in changes)
{
UpdateAfterEventFromEntryState(change, contextStateManager);
streamAfter.OnNext(change);
}
}
private static Type EntityTypeFromProxy(Type EntityProxyType)
{
Type EntityType;
if (entityProxyTypeCache.TryGetValue(EntityProxyType, out EntityType))
return EntityType;
EntityType = EntityProxyType;
do
{
if (EntityType.Namespace.StartsWith("Disco.Models.Repository"))
{
entityProxyTypeCache.TryAdd(EntityProxyType, EntityType);
return EntityType;
}
EntityType = EntityType.BaseType;
} while (EntityType != null);
throw new ArgumentException("The EntryProxyType does not inherit from any Repository Models", "EntityProxyType");
}
internal static void UpdateAfterEventFromEntryState(RepositoryMonitorEvent monitorEvent, ObjectStateManager stateManager)
{
if (monitorEvent.EventType == RepositoryMonitorEventType.Added)
{
// Update Entity Key for Added Events
var entryState = stateManager.GetObjectStateEntry(monitorEvent.Entity);
monitorEvent.EntityKey = entryState.EntityKey.EntityKeyValues.Select(kv => kv.Value).ToArray();
}
}
internal static RepositoryMonitorEvent EventFromEntryState(DiscoDataContext dbContext, DbEntityEntry dbEntryState, ObjectStateEntry entryState)
{
RepositoryMonitorEventType eventType;
string[] modifiedProperties = null;
object[] entityKey = null;
Type entityType;
switch (dbEntryState.State)
{
case System.Data.EntityState.Added:
eventType = RepositoryMonitorEventType.Added;
break;
case System.Data.EntityState.Deleted:
eventType = RepositoryMonitorEventType.Deleted;
break;
case System.Data.EntityState.Detached:
eventType = RepositoryMonitorEventType.Detached;
break;
case System.Data.EntityState.Modified:
eventType = RepositoryMonitorEventType.Modified;
break;
case System.Data.EntityState.Unchanged:
eventType = RepositoryMonitorEventType.Unchanged;
break;
default:
throw new NotSupportedException(string.Format("Database Entry State not supported: {0}", dbEntryState.State.ToString()));
}
entityType = EntityTypeFromProxy(dbEntryState.Entity.GetType());
// Only pass modified properties on Modified Event (Ignore Added/Deleted)
if (eventType == RepositoryMonitorEventType.Modified)
modifiedProperties = entryState.GetModifiedProperties().ToArray();
// Don't pass entity key when entity newly added
if (eventType != RepositoryMonitorEventType.Added)
entityKey = entryState.EntityKey.EntityKeyValues.Select(kv => kv.Value).ToArray();
return new RepositoryMonitorEvent()
{
dbContext = dbContext,
EventType = eventType,
Entity = dbEntryState.Entity,
EntityKey = entityKey,
EntityType = entityType,
ModifiedProperties = modifiedProperties
};
}
}
}
Disco.Data/Repository/Monitor/RepositoryMonitorEvent.cs
+35
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@@ -0,0 +1,35 @@
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Disco.Data.Repository.Monitor
{
public class RepositoryMonitorEvent
{
[JsonIgnore]
public DiscoDataContext dbContext { get; set; }
public RepositoryMonitorEventType EventType { get; set; }
[JsonIgnore]
public Type EntityType { get; set; }
public string EntityTypeName
{
get
{
return EntityType.Name;
}
}
[JsonIgnore]
public object Entity { get; set; }
public object[] EntityKey { get; set; }
public string[] ModifiedProperties { get; set; }
}
}
Disco.Data/Repository/Monitor/RepositoryMonitorEventType.cs
+17
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@@ -0,0 +1,17 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Disco.Data.Repository.Monitor
{
public enum RepositoryMonitorEventType
{
Added = 0,
Deleted = 1,
Modified = 2,
Detached = 3,
Unchanged = 4
}
}
Disco.Data/packages.config
+5
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@@ -2,4 +2,9 @@
<packages>
<package id="EntityFramework" version="5.0.0" targetFramework="net45" />
<package id="Newtonsoft.Json" version="4.5.11" targetFramework="net45" />
<package id="Rx-Core" version="2.1.30214.0" targetFramework="net45" />
<package id="Rx-Interfaces" version="2.1.30214.0" targetFramework="net45" />
<package id="Rx-Linq" version="2.1.30214.0" targetFramework="net45" />
<package id="Rx-Main" version="2.1.30214.0" targetFramework="net45" />
<package id="Rx-PlatformServices" version="2.1.30214.0" targetFramework="net45" />
</packages>