public override void Dispose()
{
if (_projectionStateHandler != null)
{
_projectionStateHandler.Dispose();
}
}
private void BeginCreateAndPrepare(
ProjectionStateHandlerFactory handlerFactory, ProjectionConfig config,
Action onPrepared)
{
_onPrepared = onPrepared;
if (handlerFactory == null)
{
throw new ArgumentNullException("handlerFactory");
}
if (config == null)
{
throw new ArgumentNullException("config");
}
//TODO: which states are allowed here?
if (_state >= ManagedProjectionState.Preparing)
{
throw new InvalidOperationException("Already preparing or has been prepared");
}
//TODO: load configuration from the definition
var createProjectionMessage =
new CoreProjectionManagementMessage.CreateAndPrepare(
new PublishEnvelope(_inputQueue), _id, _name, config, delegate
{
// this delegate runs in the context of a projection core thread
// TODO: move this code to the projection core service as we may be in different processes in the future
IProjectionStateHandler stateHandler = null;
try
{
stateHandler = handlerFactory.Create(HandlerType, Query, Console.WriteLine);
var checkpointStrategyBuilder = new CheckpointStrategy.Builder();
stateHandler.ConfigureSourceProcessingStrategy(checkpointStrategyBuilder);
checkpointStrategyBuilder.Validate(Mode); // avoid future exceptions in coreprojection
return(stateHandler);
}
catch (Exception ex)
{
SetFaulted(
string.Format(
"Cannot create a projection state handler.\r\n\r\nHandler type: {0}\r\nQuery:\r\n\r\n{1}\r\n\r\nMessage:\r\n\r\n{2}",
HandlerType, Query, ex.Message), ex);
if (stateHandler != null)
{
stateHandler.Dispose();
}
throw;
}
});
//note: set runnign before start as coreProjection.start() can respond with faulted
_state = ManagedProjectionState.Preparing;
_coreQueue.Publish(createProjectionMessage);
}
public void Teardown()
{
if (_stateHandler != null)
{
_stateHandler.Dispose();
}
_stateHandler = null;
GC.Collect(2, GCCollectionMode.Forced);
GC.WaitForPendingFinalizers();
}
private void Start(IPublisher coreOutput, ProjectionStateHandlerFactory handlerFactory, ProjectionConfig config)
{
if (coreOutput == null)
{
throw new ArgumentNullException("coreOutput");
}
if (handlerFactory == null)
{
throw new ArgumentNullException("handlerFactory");
}
if (config == null)
{
throw new ArgumentNullException("config");
}
if (_coreProjection != null)
{
throw new InvalidOperationException("CoreProjection has been already created");
}
IProjectionStateHandler stateHandler = null;
try
{
stateHandler = handlerFactory.Create(HandlerType, Query, Console.WriteLine);
var checkpointStrategyBuilder = new CheckpointStrategy.Builder();
stateHandler.ConfigureSourceProcessingStrategy(checkpointStrategyBuilder);
checkpointStrategyBuilder.Validate(this.Mode); // avoid future exceptions in coreprojection
// constructor can fail if wrong source defintion
//TODO: revise it
_coreProjection = new CoreProjection(_name, _id, coreOutput, stateHandler, config, _logger);
}
catch (Exception ex)
{
SetFaulted(
String.Format(
"Cannot create a projection state handler.\r\n\r\nHandler type: {0}\r\nQuery:\r\n\r\n{1}\r\n\r\nMessage:\r\n\r\n{2}",
HandlerType, Query, ex.Message), ex);
if (stateHandler != null)
{
stateHandler.Dispose();
}
return;
}
//TODO: load configuration from the definition
_state = ManagedProjectionState.Running;
//note: set runnign before start as coreProjection.start() can respond with faulted
_coreProjection.Start();
}
private void Start(ProjectionStateHandlerFactory handlerFactory, ProjectionConfig config)
{
if (handlerFactory == null)
{
throw new ArgumentNullException("handlerFactory");
}
if (config == null)
{
throw new ArgumentNullException("config");
}
if (_state == ManagedProjectionState.Running)
{
throw new InvalidOperationException("Already started");
}
//TODO: load configuration from the definition
var createProjectionMessage = new ProjectionMessage.CoreService.Management.Create(new PublishEnvelope(_inputQueue), _id, _name, config, delegate
{
IProjectionStateHandler stateHandler = null;
try
{
stateHandler = handlerFactory.Create(this.HandlerType, this.Query, Console.WriteLine);
var checkpointStrategyBuilder = new CheckpointStrategy.Builder();
stateHandler.ConfigureSourceProcessingStrategy(checkpointStrategyBuilder);
checkpointStrategyBuilder.Validate(Mode); // avoid future exceptions in coreprojection
return(stateHandler);
}
catch (Exception ex)
{
SetFaulted(String.Format("Cannot create a projection state handler.\r\n\r\nHandler type: {0}\r\nQuery:\r\n\r\n{1}\r\n\r\nMessage:\r\n\r\n{2}", HandlerType, Query, ex.Message), ex);
if (stateHandler != null)
{
stateHandler.Dispose();
}
throw;
}
});
//note: set runnign before start as coreProjection.start() can respond with faulted
_state = ManagedProjectionState.Running;
_coreQueue.Publish(createProjectionMessage);
_coreQueue.Publish(new ProjectionMessage.Projections.Management.Start(_id));
}
public void can_compile_million_times()
{
for (var i = 0; i < 10000000; i++)
{
if (_stateHandler != null)
{
_stateHandler.Dispose();
}
_stateHandler = null;
/*
* _state = null;
*/
_projection = null;
_projection = @"
fromAll();
on_raw(function(state, event, streamId, eventType, sequenceNumber, metadata) {
emit('output-stream' + sequenceNumber, 'emitted-event' + sequenceNumber, {a: JSON.parse(event).a});
return {};
});
";
_logged = new List <string>();
_stateHandlerFactory = new ProjectionStateHandlerFactory();
_stateHandler = _stateHandlerFactory.Create(
"JS", _projection, s =>
{
if (!s.StartsWith("P:"))
{
_logged.Add(s);
}
else
{
_logDelegate(s);
}
}); // skip prelude debug output
/*
* if (_state != null)
* _stateHandler.Load(_state);
* else
* _stateHandler.Initialize();
*/
Console.Write(".");
}
}
private void BeginCreateAndPrepare(
ProjectionStateHandlerFactory handlerFactory, ProjectionConfig config, Action onPrepared)
{
_onPrepared = _onStopped = () =>
{
_onStopped = null;
_onPrepared = null;
if (onPrepared != null)
{
onPrepared();
}
};
if (handlerFactory == null)
{
throw new ArgumentNullException("handlerFactory");
}
if (config == null)
{
throw new ArgumentNullException("config");
}
//TODO: which states are allowed here?
if (_state >= ManagedProjectionState.Preparing)
{
DisposeCoreProjection();
_state = ManagedProjectionState.Loaded;
}
//TODO: load configuration from the definition
Func <IProjectionStateHandler> stateHandlerFactory = delegate
{
// this delegate runs in the context of a projection core thread
// TODO: move this code to the projection core service as we may be in different processes in the future
IProjectionStateHandler stateHandler = null;
try
{
stateHandler = handlerFactory.Create(
HandlerType, Query, logger: s => _logger.Trace(s),
cancelCallbackFactory:
_timeoutScheduler == null
? (Action <int, Action>)null
: _timeoutScheduler.Schedule);
return(stateHandler);
}
catch (Exception ex)
{
SetFaulted(
string.Format(
"Cannot create a projection state handler.\r\n\r\nHandler type: {0}\r\nQuery:\r\n\r\n{1}\r\n\r\nMessage:\r\n\r\n{2}",
HandlerType, Query, ex.Message), ex);
if (stateHandler != null)
{
stateHandler.Dispose();
}
throw;
}
};
var createProjectionMessage = _isSlave ?
(Message) new CoreProjectionManagementMessage.CreateAndPrepareSlave(
new PublishEnvelope(_inputQueue), Id, _name,
new ProjectionVersion(_projectionId, _persistedState.Epoch ?? 0, _persistedState.Version ?? 0),
config, _slaveResultsPublisher, _slaveMasterCorrelationId, stateHandlerFactory) :
new CoreProjectionManagementMessage.CreateAndPrepare(
new PublishEnvelope(_inputQueue), Id, _name,
new ProjectionVersion(_projectionId, _persistedState.Epoch ?? 0, _persistedState.Version ?? 0),
config, HandlerType, Query, stateHandlerFactory);
//note: set runnign before start as coreProjection.start() can respond with faulted
_state = ManagedProjectionState.Preparing;
_coreQueue.Publish(createProjectionMessage);
}