public static OperationContext CreateSystemContext(this EntityApp app)
{
Util.Check(app != null, "App may not be null.");
var sysContext = new OperationContext(app, UserInfo.System);
return(sysContext);
}
public static IEntitySession OpenSystemSession(this EntityApp app)
{
Util.Check(app != null, "App may not be null.");
var sysContext = new OperationContext(app, UserInfo.System);
return(new EntitySession(sysContext));
}
public OperationContext(EntityApp app, UserInfo user = null, WebCallContext webContext = null, ILog log = null,
DbConnectionReuseMode connectionMode = DbConnectionReuseMode.NoReuse,
ProcessType?processType = null, Guid?processId = null)
{
App = app;
User = user ?? UserInfo.Anonymous;
WebContext = webContext;
Log = log ?? new DefaultOperationLog(this);
DbConnectionMode = connectionMode;
ProcessId = processId;
if (WebContext != null)
{
ProcessType = ProcessType.WebRequest;
}
else
{
if (processType == null)
{
ProcessType = (processId == null) ? ProcessType.User : ProcessType.BackgroundProcess;
}
else
{
ProcessType = processType.Value;
}
}
}
public static IEntitySession OpenSystemSession(this EntityApp app)
{
Util.CheckParam(app, nameof(app));
var ctx = app.CreateSystemContext();
return(ctx.OpenSession());
}
public static int GetPropertySize <TEntity>(this EntityApp app, Expression <Func <TEntity, object> > selector)
{
var propName = ExpressionHelper.GetSelectedProperty(selector);
var ent = app.Model.GetEntityInfo(typeof(TEntity), throwIfNotFound: true);
var member = ent.GetMember(propName, throwIfNotFound: true);
return(member.Size);
}
/// <summary>Opens entity session.</summary>
/// <param name="app">Entity app.</param>
/// <param name="user">User info, optional.</param>
/// <returns>Entity session instance.</returns>
public static IEntitySession OpenSession(this EntityApp app, UserInfo user = null)
{
Util.Check(app != null, "App may not be null.");
user = user ?? UserInfo.Anonymous;
var anonContext = new OperationContext(app, user);
return(new EntitySession(anonContext));
}
//.NET framework's GetHashCode() is not guaranteed to be stable between .NET versions.
// If we want to keep hashes in database, we need a stable hash implementation
public static int ComputeStableHash(this EntityApp app, string value)
{
if (string.IsNullOrWhiteSpace(value))
{
return(0);
}
var hasher = app.GetService <IHashingService>();
return(hasher.ComputeHash(value));
}
/// <summary>Constructs a new instance of the <c>EntityModule</c> class. </summary>
/// <param name="area">Primary entity area to register module entities.</param>
/// <param name="name">Module name.</param>
/// <param name="description">Optional. Module description.</param>
/// <param name="version">Module version.</param>
public EntityModule(EntityArea area, string name, string description = null, Version version = null)
{
Area = area;
App = Area.App;
Util.Check(App.Status == EntityAppStatus.Created, "Module may not be added to an entity app after it is initialized.");
Name = name;
Description = description;
Version = version ?? new Version("1.0.0.0");
App.AddModule(this);
}
public OperationContext(EntityApp app, UserInfo user = null, WebCallContext webContext = null,
DbConnectionReuseMode connectionMode = DbConnectionReuseMode.NoReuse)
{
App = app;
User = user ?? UserInfo.Anonymous;
WebContext = webContext;
DbConnectionMode = connectionMode;
LocalLog = new MemoryLog(this);
Disposables = new ConcurrentDisposableSet();
}
//Used for creating System-level context within user operation
public OperationContext(OperationContext parentContext, UserInfo user)
{
App = parentContext.App;
User = user;
WebContext = parentContext.WebContext;
LocalLog = parentContext.LocalLog;
UserSession = parentContext.UserSession;
DataSourceName = parentContext.DataSourceName;
DbConnectionMode = parentContext.DbConnectionMode;
Disposables = parentContext.Disposables;
}
public static int GetPropertySize <TEntity>(this EntityApp app, Expression <Func <TEntity, object> > selector)
{
var ent = app.Model.GetEntityInfo(typeof(TEntity));
Util.Check(ent != null, "Type {0} is not a registered entity, cannot retrieve property size.", typeof(TEntity));
var propName = ReflectionHelper.GetSelectedProperty(selector);
var member = ent.GetMember(propName);
Util.Check(member != null, "Property {0} not found on entity {1}.", propName, typeof(TEntity));
return(member.Size);
}
/// <summary>Imports services from external service provider. </summary>
/// <param name="fromApp">External service provider, usually another entity applications.</param>
/// <param name="serviceTypes">Types of services to import.</param>
public void ImportServices(EntityApp fromApp, params Type[] serviceTypes)
{
foreach (var type in serviceTypes)
{
var serv = fromApp.GetService(type);
if (serv != null)
{
this._services[type] = serv;
}
}
}
public ServiceEventArgs(EntityApp app, Type serviceType, object serviceInstance)
{
App = app;
ServiceType = serviceType;
ServiceInstance = serviceInstance;
}
public AppInitEventArgs(EntityApp app, EntityAppInitStep step)
{
App = app;
Step = step;
}
internal void OnServiceAdded(EntityApp app, Type serviceType, object serviceInstance)
{
ServiceAdded?.Invoke(this, new ServiceEventArgs(app, serviceType, serviceInstance));
}
public EntityAppEvents(EntityApp app)
{
_app = app;
}
// The constructor is internal, use EntityModelSetup.AddArea method
internal EntityArea(EntityApp app, string name)
{
App = app;
Util.CheckNotEmpty(name, "SchemaName may not be empty.");
Name = name.Trim().ToLowerInvariant();
}
/// <summary>Opens an entity session for an anonymous user. </summary>
/// <param name="app">Entity app instance.</param>
/// <returns>An entity session.</returns>
public static IEntitySession OpenSession(this EntityApp app)
{
var context = new OperationContext(app, UserInfo.Anonymous);
return(new EntitySession(context));
}
public static Vita.Data.Runtime.Database GetDefaultDatabase(this EntityApp app)
{
return(app.DataAccess.GetDataSources().FirstOrDefault()?.Database);
}
/// <summary>Checks if an entity is registered with entity model.
/// For use in customizable models when several versions might exist for different environments,
/// and some entities are excluded in some models.</summary>
/// <param name="app">Entity app.</param>
/// <param name="entityType">The type of entity to check.</param>
/// <returns>True if the entity is part of the model; otherwise, false.</returns>
public static bool IsRegisteredEntity(this EntityApp app, Type entityType)
{
return(app.Model.EntitiesByType.ContainsKey(entityType));
}
public static OperationContext CreateSystemContext(this EntityApp app)
{
var ctx = new OperationContext(app, UserInfo.System);
return(ctx);
}
