protected override IAsyncResult BeginTryCommand(InstancePersistenceContext context, InstancePersistenceCommand command, TimeSpan timeout, AsyncCallback callback, object state)
{
if(context == null) throw new ArgumentNullException("context");
if(command == null) throw new ArgumentNullException("command");
// Log which commands we are receiving
Debug.WriteLine("InstanceStore::BeginTryCommand::{0} received", command.GetType().Name);
IAsyncResult result = null;
// validate the store lock
if (command is CreateWorkflowOwnerCommand)
{
result = CreateWorkflowOwner(context, (CreateWorkflowOwnerCommand) command, timeout, callback, state);
}
if (result == null)
{
// Log which commands we are not handling
Debug.WriteLine("InstanceStore::BeginTryCommand::{0} was not implemented", command.GetType().Name);
// The base.BeginTryCommand will return a false (unhandled) return value
return base.BeginTryCommand(context, command, timeout, callback, state);
}
return result;
}
protected override IAsyncResult BeginTryCommand(
InstancePersistenceContext context,
InstancePersistenceCommand command,
TimeSpan timeout, AsyncCallback callback, object state)
{
switch(command.GetType().Name)
{
case "CreateWorkflowOwnerCommand":
Func<Exception> createFunc = () => ProcessCreateWorkflowOwner(context,
command as CreateWorkflowOwnerCommand);
return createFunc.BeginInvoke(ar =>
{
Exception ex = createFunc.EndInvoke(ar);
callback(new InstanceStoreAsyncResult(ar, ex));
}, state);
case "LoadWorkflowCommand":
Func<Exception> loadFunc = () => ProcessLoadWorkflow(context,
command as LoadWorkflowCommand);
return loadFunc.BeginInvoke(ar =>
{
Exception ex = loadFunc.EndInvoke(ar);
callback(new InstanceStoreAsyncResult(ar, ex));
}, state);
case "LoadWorkflowByInstanceKeyCommand":
Func<Exception> loadByKeyFunc = () => ProcessLoadWorkflowByInstanceKey(context,
command as LoadWorkflowByInstanceKeyCommand);
return loadByKeyFunc.BeginInvoke(ar =>
{
Exception ex = loadByKeyFunc.EndInvoke(ar);
callback(new InstanceStoreAsyncResult(ar, ex));
}, state);
case "SaveWorkflowCommand":
Func<Exception> saveFunc = () => ProcessSaveWorkflow(context,
command as SaveWorkflowCommand);
return saveFunc.BeginInvoke(ar =>
{
Exception ex = saveFunc.EndInvoke(ar);
callback(new InstanceStoreAsyncResult(ar, ex));
}, state);
default:
return base.BeginTryCommand(
context, command, timeout, callback, state);
}
}
