private object getServerInstance(serverImplementer server, RequestMsg request, out Guid?checkedOutID, out bool lockTaken)
{
object result = null;
checkedOutID = null;
lockTaken = false;
if (server.InstanceMode == ServerInstanceMode.Singleton)
{
if (!m_SingletonInstances.TryGetValue(server.Implementation, out result))
{
lock (m_SingletonInstancesLock)
{
if (!m_SingletonInstances.TryGetValue(server.Implementation, out result))
{
result = createInstance(server);
var dict = new Dictionary <Type, object>(m_SingletonInstances);
dict[server.Implementation] = result;
m_SingletonInstances = dict;//atomic
}
}
}
}
else
if (server.InstanceMode == ServerInstanceMode.Stateful ||
server.InstanceMode == ServerInstanceMode.AutoConstructedStateful)
{
if (request.RemoteInstance.HasValue)
{
result = App.ObjectStore.CheckOut(request.RemoteInstance.Value);
if (result == null || result.GetType() != server.Implementation)
{
throw new StatefulServerInstanceDoesNotExistException(StringConsts.GLUE_STATEFUL_SERVER_INSTANCE_DOES_NOT_EXIST_ERROR + server.Implementation.FullName);
}
checkedOutID = request.RemoteInstance.Value;
if (!server.ThreadSafe)
{
if (!Monitor.TryEnter(result, this.Glue.ServerInstanceLockTimeoutMs))
{
App.ObjectStore.CheckIn(checkedOutID.Value); //check it back in because we could not lock it
throw new StatefulServerInstanceLockTimeoutException(StringConsts.GLUE_STATEFUL_SERVER_INSTANCE_LOCK_TIMEOUT_ERROR + server.Implementation.FullName);
}
lockTaken = true;
}
}
else
{
result = createInstance(server); //no need to lock as instance is brand new
}
}
else // ServerInstanceMode.PerCall
{
result = createInstance(server);
}
return(result);
}
private serverImplementer getServerImplementer(ServerEndPoint sep, Type contract)
{
serverImplementer server;
if (sep.m_ContractImplementers.TryGetValue(contract, out server))
{
return(server);
}
server = new serverImplementer(this, sep, contract); //throws
sep.m_ContractImplementers.TryAdd(contract, server);
return(server);
}
private object createInstance(serverImplementer server)
{
try
{
if (server.SupportsGlueCtor)
{
return(Activator.CreateInstance(server.Implementation, Glue, server.InstanceMode));
}
else
{
return(Activator.CreateInstance(server.Implementation, true));
}
}
catch (Exception error)
{
throw new ServerInstanceActivationException(StringConsts.GLUE_SERVER_INSTANCE_ACTIVATION_ERROR + server.Implementation.FullName, error);
}
}
private object getServerInstance(serverImplementer server, RequestMsg request, out Guid?checkedOutID, out bool lockTaken)
{
object result = null;
checkedOutID = null;
lockTaken = false;
if (server.InstanceMode == ServerInstanceMode.Singleton)
{
if (!m_SingletonInstances.TryGetValue(server.Implementation, out result)) //per ServerHandler/Glue instance
{
lock (m_SingletonInstancesLock)
{
if (!m_SingletonInstances.TryGetValue(server.Implementation, out result))
{
result = createInstance(server);
//Inject dependencies into singleton server implementor ONLY ONCE at creation
App.DependencyInjector.InjectInto(result);
var dict = new Dictionary <Type, object>(m_SingletonInstances);
dict[server.Implementation] = result;
m_SingletonInstances = dict;//atomic
}
}
}
}
else
if (server.InstanceMode == ServerInstanceMode.Stateful ||
server.InstanceMode == ServerInstanceMode.AutoConstructedStateful)
{
if (request.RemoteInstance.HasValue)
{
result = App.ObjectStore.CheckOut(request.RemoteInstance.Value);
if (result == null || result.GetType() != server.Implementation)
{
throw new StatefulServerInstanceDoesNotExistException(StringConsts.GLUE_STATEFUL_SERVER_INSTANCE_DOES_NOT_EXIST_ERROR + server.Implementation.FullName);
}
checkedOutID = request.RemoteInstance.Value;
if (!server.ThreadSafe)
{
if (!Monitor.TryEnter(result, this.Glue.ServerInstanceLockTimeoutMs))
{
App.ObjectStore.CheckIn(checkedOutID.Value); //check it back in because we could not lock it
throw new StatefulServerInstanceLockTimeoutException(StringConsts.GLUE_STATEFUL_SERVER_INSTANCE_LOCK_TIMEOUT_ERROR + server.Implementation.FullName);
}
lockTaken = true;
}
}
else
{
result = createInstance(server); //no need to lock as instance is brand new
}
//Inject dependencies into newly created or checked out stateful instance
//The DI is thread safe because in the unlikely case of DI injected values change,
//DI sets all ref type fields atomically per CLR guarantee
App.DependencyInjector.InjectInto(result);
}
else // ServerInstanceMode.PerCall
{
result = createInstance(server);
//Inject dependencies into newly created per-call instance
App.DependencyInjector.InjectInto(result);
}
//singleton is NOT DI'ed here
return(result);
}
private object createInstance(serverImplementer server)
{
try
{
if (server.SupportsGlueCtor)
return Activator.CreateInstance(server.Implementation, Glue, server.InstanceMode);
else
return Activator.CreateInstance(server.Implementation, true);
}
catch(Exception error)
{
throw new ServerInstanceActivationException(StringConsts.GLUE_SERVER_INSTANCE_ACTIVATION_ERROR + server.Implementation.FullName, error);
}
}
private object getServerInstance(serverImplementer server, RequestMsg request, out Guid? checkedOutID, out bool lockTaken)
{
object result = null;
checkedOutID = null;
lockTaken = false;
if (server.InstanceMode == ServerInstanceMode.Singleton)
{
if (!m_SingletonInstances.TryGetValue(server.Implementation, out result))
lock(m_SingletonInstancesLock)
{
if (!m_SingletonInstances.TryGetValue(server.Implementation, out result))
{
result = createInstance(server);
var dict = new Dictionary<Type, object>( m_SingletonInstances );
dict[server.Implementation] = result;
m_SingletonInstances = dict;//atomic
}
}
}
else
if (server.InstanceMode == ServerInstanceMode.Stateful ||
server.InstanceMode == ServerInstanceMode.AutoConstructedStateful)
{
if (request.RemoteInstance.HasValue)
{
result = App.ObjectStore.CheckOut(request.RemoteInstance.Value);
if (result==null || result.GetType()!=server.Implementation)
throw new StatefulServerInstanceDoesNotExistException(StringConsts.GLUE_STATEFUL_SERVER_INSTANCE_DOES_NOT_EXIST_ERROR + server.Implementation.FullName);
checkedOutID = request.RemoteInstance.Value;
if (!server.ThreadSafe)
{
if (!Monitor.TryEnter(result, this.Glue.ServerInstanceLockTimeoutMs))
{
App.ObjectStore.CheckIn(checkedOutID.Value);//check it back in because we could not lock it
throw new StatefulServerInstanceLockTimeoutException(StringConsts.GLUE_STATEFUL_SERVER_INSTANCE_LOCK_TIMEOUT_ERROR + server.Implementation.FullName);
}
lockTaken = true;
}
}
else
result = createInstance(server);//no need to lock as instance is brand new
}
else // ServerInstanceMode.PerCall
{
result = createInstance(server);
}
return result;
}
private serverImplementer getServerImplementer(ServerEndPoint sep, Type contract)
{
serverImplementer server;
if (sep.m_ContractImplementers.TryGetValue(contract, out server)) return server;
server = new serverImplementer(this, sep, contract); //throws
sep.m_ContractImplementers.TryAdd(contract, server);
return server;
}
