/// <inheritdoc/>
public object Invoke(Type scopingType, object scopingKey, ParameterCollection parameters)
{
if (this.m_dispatchers == null)
{
this.m_dispatchers = DispatcherFactoryUtil.GetFactories().Select(o => o.Value.Id).ToArray();
}
return(new GenericRestResultCollection()
{
Values = this.m_dispatchers.OfType <Object>().ToList()
});
}
/// <summary>
/// Get all dispatchers and subscriptions
/// </summary>
protected IEnumerable <IPubSubDispatcher> GetDispatchers(PubSubEventType eventType, Object data)
{
using (AuthenticationContext.EnterSystemContext())
{
var resourceName = data.GetType().GetSerializationName();
var subscriptions = this.m_pubSubManager
.FindSubscription(o => o.ResourceTypeName == resourceName && o.IsActive && (o.NotBefore == null || o.NotBefore < DateTimeOffset.Now) && (o.NotAfter == null || o.NotAfter > DateTimeOffset.Now))
.Where(o => o.Event.HasFlag(eventType))
.Where(s =>
{
// Attempt to compile the filter criteria into an executable function
if (!this.m_filterCriteria.TryGetValue(s.Key.Value, out Func <Object, bool> fn))
{
Expression dynFn = null;
var parameter = Expression.Parameter(data.GetType());
foreach (var itm in s.Filter)
{
var fFn = QueryExpressionParser.BuildLinqExpression(data.GetType(), NameValueCollection.ParseQueryString(itm), "p", forceLoad: true, lazyExpandVariables: true);
if (dynFn is LambdaExpression le)
{
dynFn = Expression.Lambda(
Expression.And(
Expression.Invoke(le, parameter),
Expression.Invoke(fFn, parameter)
), parameter);
}
else
{
dynFn = fFn;
}
}
if (dynFn == null)
{
dynFn = Expression.Lambda(Expression.Constant(true), parameter);
}
parameter = Expression.Parameter(typeof(object));
fn = Expression.Lambda(Expression.Invoke(dynFn, Expression.Convert(parameter, data.GetType())), parameter).Compile() as Func <Object, bool>;
this.m_filterCriteria.TryAdd(s.Key.Value, fn);
}
return(fn(data));
});
// Now we want to filter by channel, since the channel is really what we're interested in
foreach (var chnl in subscriptions.GroupBy(o => o.ChannelKey))
{
var channelDef = this.m_pubSubManager.GetChannel(chnl.Key);
var factory = DispatcherFactoryUtil.FindDispatcherFactoryById(channelDef.DispatcherFactoryId);
yield return(factory.CreateDispatcher(chnl.Key, new Uri(channelDef.Endpoint), channelDef.Settings.ToDictionary(o => o.Name, o => o.Value)));
}
}
}
/// <summary>
/// Regiser a channel
/// </summary>
public PubSubChannelDefinition RegisterChannel(string name, Type dispatcherFactoryType, Uri endpoint, IDictionary <string, string> settings)
{
return(this.RegisterChannel(name, DispatcherFactoryUtil.FindDispatcherFactoryByType(dispatcherFactoryType)?.Id, endpoint, settings));
}
/// <summary>
/// Register the specified channel
/// </summary>
public PubSubChannelDefinition RegisterChannel(string name, string dispatcherFactoryId, Uri endpoint, IDictionary <string, string> settings)
{
if (String.IsNullOrEmpty(name))
{
throw new ArgumentNullException(nameof(name));
}
else if (String.IsNullOrEmpty(dispatcherFactoryId))
{
var dispatchFactory = DispatcherFactoryUtil.FindDispatcherFactoryByUri(endpoint);
if (dispatchFactory == null)
{
throw new InvalidOperationException("Cannot find dispatcher factory for scheme!");
}
dispatcherFactoryId = dispatchFactory.Id;
}
else if (endpoint == null)
{
throw new ArgumentNullException(nameof(endpoint));
}
// Validate state
this.m_policyEnforcementService.Demand(PermissionPolicyIdentifiers.CreatePubSubSubscription);
var channel = new PubSubChannelDefinition()
{
Name = name,
DispatcherFactoryId = dispatcherFactoryId,
Endpoint = endpoint.ToString(),
IsActive = false,
Settings = settings.Select(o => new PubSubChannelSetting()
{
Name = o.Key, Value = o.Value
}).ToList()
};
using (var conn = this.m_configuration.Provider.GetWriteConnection())
{
try
{
conn.Open();
using (var tx = conn.BeginTransaction())
{
var dbChannel = this.m_mapper.MapModelInstance <PubSubChannelDefinition, DbChannel>(channel);
dbChannel.Endpoint = channel.Endpoint.ToString();
// Get the authorship
var se = this.m_securityRepository.GetSecurityEntity(AuthenticationContext.Current.Principal);
if (se == null)
{
throw new KeyNotFoundException($"Unable to determine structure data for {AuthenticationContext.Current.Principal.Identity.Name}");
}
dbChannel.CreatedByKey = se.Key.Value;
dbChannel.CreationTime = DateTimeOffset.Now;
dbChannel = conn.Insert(dbChannel);
// Insert settings
foreach (var itm in channel.Settings)
{
conn.Insert(new DbChannelSetting()
{
ChannelKey = dbChannel.Key.Value,
Name = itm.Name,
Value = itm.Value
});
}
tx.Commit();
channel = this.MapInstance(conn, dbChannel);
this.m_cache?.Add(channel);
return(channel);
}
}
catch (Exception e)
{
throw new Exception($"Error creating channel {channel}", e);
}
}
}
