public ManagedProjection(
IPublisher coreQueue,
Guid id, string name, ILogger logger,
RequestResponseDispatcher <ClientMessage.WriteEvents, ClientMessage.WriteEventsCompleted> writeDispatcher,
RequestResponseDispatcher <ClientMessage.ReadStreamEventsBackward, ClientMessage.ReadStreamEventsBackwardCompleted>
readDispatcher, IPublisher inputQueue, ProjectionStateHandlerFactory projectionStateHandlerFactory)
{
if (id == Guid.Empty)
{
throw new ArgumentException("id");
}
if (name == null)
{
throw new ArgumentNullException("name");
}
if (name == "")
{
throw new ArgumentException("name");
}
_coreQueue = coreQueue;
_id = id;
_name = name;
_logger = logger;
_writeDispatcher = writeDispatcher;
_readDispatcher = readDispatcher;
_inputQueue = inputQueue;
_projectionStateHandlerFactory = projectionStateHandlerFactory;
}
public void Setup()
{
_state = null;
_projection = null;
Given();
_logged = new List<string>();
_stateHandlerFactory = new ProjectionStateHandlerFactory();
_stateHandler = _stateHandlerFactory.Create(
"JS", _projection, logger: s =>
{
if (s.StartsWith("P:"))
Console.WriteLine(s);
else
_logged.Add(s);
}); // skip prelude debug output
_source = _stateHandler.GetSourceDefinition();
if (_state != null)
_stateHandler.Load(_state);
else
_stateHandler.Initialize();
if (_sharedState != null)
_stateHandler.LoadShared(_sharedState);
When();
}
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, logger: (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 = 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 ManagedProjection(
IPublisher coreQueue, Guid id, int projectionId, string name, bool enabledToRun, ILogger logger,
RequestResponseDispatcher <ClientMessage.WriteEvents, ClientMessage.WriteEventsCompleted> writeDispatcher,
RequestResponseDispatcher
<ClientMessage.ReadStreamEventsBackward, ClientMessage.ReadStreamEventsBackwardCompleted> readDispatcher,
IPublisher inputQueue, IPublisher output, ProjectionStateHandlerFactory projectionStateHandlerFactory,
ITimeProvider timeProvider, ISingletonTimeoutScheduler timeoutScheduler = null, bool isSlave = false,
IPublisher slaveResultsPublisher = null, Guid slaveMasterCorrelationId = default(Guid))
{
if (coreQueue == null)
{
throw new ArgumentNullException("coreQueue");
}
if (id == Guid.Empty)
{
throw new ArgumentException("id");
}
if (name == null)
{
throw new ArgumentNullException("name");
}
if (output == null)
{
throw new ArgumentNullException("output");
}
if (name == "")
{
throw new ArgumentException("name");
}
_coreQueue = coreQueue;
_id = id;
_projectionId = projectionId;
_name = name;
_enabledToRun = enabledToRun;
_logger = logger;
_writeDispatcher = writeDispatcher;
_readDispatcher = readDispatcher;
_inputQueue = inputQueue;
_output = output;
_projectionStateHandlerFactory = projectionStateHandlerFactory;
_timeProvider = timeProvider;
_timeoutScheduler = timeoutScheduler;
_isSlave = isSlave;
_slaveResultsPublisher = slaveResultsPublisher;
_slaveMasterCorrelationId = slaveMasterCorrelationId;
_getStateDispatcher =
new RequestResponseDispatcher
<CoreProjectionManagementMessage.GetState, CoreProjectionManagementMessage.StateReport>(
coreQueue, v => v.CorrelationId, v => v.CorrelationId, new PublishEnvelope(_inputQueue));
_getResultDispatcher =
new RequestResponseDispatcher
<CoreProjectionManagementMessage.GetResult, CoreProjectionManagementMessage.ResultReport>(
coreQueue, v => v.CorrelationId, v => v.CorrelationId, new PublishEnvelope(_inputQueue));
_lastAccessed = _timeProvider.Now;
}
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();
}
public ManagedProjection(
Guid id, string name, ILogger logger,
RequestResponseDispatcher<ClientMessage.WriteEvents, ClientMessage.WriteEventsCompleted> writeDispatcher,
RequestResponseDispatcher<ClientMessage.ReadEventsBackwards, ClientMessage.ReadEventsBackwardsCompleted>
readDispatcher, IPublisher publisher, ProjectionStateHandlerFactory projectionStateHandlerFactory)
{
if (id == Guid.Empty) throw new ArgumentException("id");
if (name == null) throw new ArgumentNullException("name");
if (name == "") throw new ArgumentException("name");
_id = id;
_name = name;
_logger = logger;
_writeDispatcher = writeDispatcher;
_readDispatcher = readDispatcher;
_publisher = publisher;
_projectionStateHandlerFactory = projectionStateHandlerFactory;
}
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 ProjectionManager(
IPublisher inputQueue, IPublisher publisher, IPublisher[] queues, ITimeProvider timeProvider,
RunProjections runProjections, bool initializeSystemProjections = true)
{
if (inputQueue == null)
{
throw new ArgumentNullException("inputQueue");
}
if (publisher == null)
{
throw new ArgumentNullException("publisher");
}
if (queues == null)
{
throw new ArgumentNullException("queues");
}
if (queues.Length == 0)
{
throw new ArgumentException("At least one queue is required", "queues");
}
_inputQueue = inputQueue;
_publisher = publisher;
_queues = queues;
_timeoutSchedulers = CreateTimeoutSchedulers(queues);
_timeProvider = timeProvider;
_runProjections = runProjections;
_initializeSystemProjections = initializeSystemProjections;
_writeDispatcher =
new RequestResponseDispatcher <ClientMessage.WriteEvents, ClientMessage.WriteEventsCompleted>(
publisher, v => v.CorrelationId, v => v.CorrelationId, new PublishEnvelope(_inputQueue));
_readDispatcher =
new RequestResponseDispatcher
<ClientMessage.ReadStreamEventsBackward, ClientMessage.ReadStreamEventsBackwardCompleted>(
publisher, v => v.CorrelationId, v => v.CorrelationId, new PublishEnvelope(_inputQueue));
_projectionStateHandlerFactory = new ProjectionStateHandlerFactory();
_projections = new Dictionary <string, ManagedProjection>();
_projectionsMap = new Dictionary <Guid, string>();
_publishEnvelope = new PublishEnvelope(_inputQueue, crossThread: true);
}
public void setup()
{
_state = null;
_projection = null;
Given();
_logged = new List<string>();
_stateHandlerFactory = new ProjectionStateHandlerFactory();
_stateHandler = _stateHandlerFactory.Create(
"JS", _projection, s =>
{
if (!s.StartsWith("P:")) _logged.Add(s);
else Console.WriteLine(s);
}); // skip prelude debug output
_source = new SourceRecorder();
_stateHandler.ConfigureSourceProcessingStrategy(_source);
if (_state != null)
_stateHandler.Load(_state);
else
_stateHandler.Initialize();
}
public ProjectionManager(IPublisher coreOutput, ICheckpoint checkpointForStatistics)
{
if (coreOutput == null)
{
throw new ArgumentNullException("coreOutput");
}
_writeDispatcher =
new RequestResponseDispatcher <ClientMessage.WriteEvents, ClientMessage.WriteEventsCompleted>(
coreOutput, v => v.CorrelationId, v => v.CorrelationId);
_readDispatcher =
new RequestResponseDispatcher
<ClientMessage.ReadEventsBackwards, ClientMessage.ReadEventsBackwardsCompleted>(
coreOutput, v => v.CorrelationId, v => v.CorrelationId);
_coreOutput = coreOutput;
_checkpointForStatistics = checkpointForStatistics;
_projectionStateHandlerFactory = new ProjectionStateHandlerFactory();
_projections = new Dictionary <string, ManagedProjection>();
_projectionsMap = new Dictionary <Guid, string>();
}
public ManagedProjection(
IPublisher coreQueue, Guid id, string name, ILogger logger,
RequestResponseDispatcher<ClientMessage.WriteEvents, ClientMessage.WriteEventsCompleted> writeDispatcher,
RequestResponseDispatcher
<ClientMessage.ReadStreamEventsBackward, ClientMessage.ReadStreamEventsBackwardCompleted> readDispatcher,
IPublisher inputQueue, ProjectionStateHandlerFactory projectionStateHandlerFactory)
{
if (id == Guid.Empty) throw new ArgumentException("id");
if (name == null) throw new ArgumentNullException("name");
if (name == "") throw new ArgumentException("name");
_coreQueue = coreQueue;
_id = id;
_name = name;
_logger = logger;
_writeDispatcher = writeDispatcher;
_readDispatcher = readDispatcher;
_inputQueue = inputQueue;
_projectionStateHandlerFactory = projectionStateHandlerFactory;
_getStateDispatcher =
new RequestResponseDispatcher
<CoreProjectionManagementMessage.GetState, CoreProjectionManagementMessage.StateReport>(
coreQueue, v => v.CorrelationId, v => v.CorrelationId, new PublishEnvelope(_inputQueue));
}
public ProjectionManager(IPublisher inputQueue, IPublisher publisher, IPublisher[] queues, ICheckpoint checkpointForStatistics)
{
if (inputQueue == null)
{
throw new ArgumentNullException("inputQueue");
}
if (publisher == null)
{
throw new ArgumentNullException("publisher");
}
if (queues == null)
{
throw new ArgumentNullException("queues");
}
if (queues.Length == 0)
{
throw new ArgumentException("queues");
}
_inputQueue = inputQueue;
_publisher = publisher;
_checkpointForStatistics = checkpointForStatistics;
_queues = queues;
_writeDispatcher =
new RequestResponseDispatcher <ClientMessage.WriteEvents, ClientMessage.WriteEventsCompleted>(
publisher, v => v.CorrelationId, v => v.CorrelationId, new PublishEnvelope(_inputQueue));
_readDispatcher =
new RequestResponseDispatcher
<ClientMessage.ReadStreamEventsBackward, ClientMessage.ReadStreamEventsBackwardCompleted>(
publisher, v => v.CorrelationId, v => v.CorrelationId, new PublishEnvelope(_inputQueue));
_projectionStateHandlerFactory = new ProjectionStateHandlerFactory();
_projections = new Dictionary <string, ManagedProjection>();
_projectionsMap = new Dictionary <Guid, string>();
}
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 ManagedProjection(
IPublisher coreQueue, Guid id, int projectionId, string name, bool enabledToRun, ILogger logger,
RequestResponseDispatcher<ClientMessage.WriteEvents, ClientMessage.WriteEventsCompleted> writeDispatcher,
RequestResponseDispatcher
<ClientMessage.ReadStreamEventsBackward, ClientMessage.ReadStreamEventsBackwardCompleted> readDispatcher,
IPublisher inputQueue, IPublisher output, ProjectionStateHandlerFactory projectionStateHandlerFactory,
ITimeProvider timeProvider, ISingletonTimeoutScheduler timeoutScheduler = null, bool isSlave = false,
IPublisher slaveResultsPublisher = null, Guid slaveMasterCorrelationId = default(Guid))
{
if (coreQueue == null) throw new ArgumentNullException("coreQueue");
if (id == Guid.Empty) throw new ArgumentException("id");
if (name == null) throw new ArgumentNullException("name");
if (output == null) throw new ArgumentNullException("output");
if (name == "") throw new ArgumentException("name");
_coreQueue = coreQueue;
_id = id;
_projectionId = projectionId;
_name = name;
_enabledToRun = enabledToRun;
_logger = logger;
_writeDispatcher = writeDispatcher;
_readDispatcher = readDispatcher;
_inputQueue = inputQueue;
_output = output;
_projectionStateHandlerFactory = projectionStateHandlerFactory;
_timeProvider = timeProvider;
_timeoutScheduler = timeoutScheduler;
_isSlave = isSlave;
_slaveResultsPublisher = slaveResultsPublisher;
_slaveMasterCorrelationId = slaveMasterCorrelationId;
_getStateDispatcher =
new RequestResponseDispatcher
<CoreProjectionManagementMessage.GetState, CoreProjectionManagementMessage.StateReport>(
coreQueue, v => v.CorrelationId, v => v.CorrelationId, new PublishEnvelope(_inputQueue));
_getResultDispatcher =
new RequestResponseDispatcher
<CoreProjectionManagementMessage.GetResult, CoreProjectionManagementMessage.ResultReport>(
coreQueue, v => v.CorrelationId, v => v.CorrelationId, new PublishEnvelope(_inputQueue));
_lastAccessed = _timeProvider.Now;
}
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);
}
public void Setup()
{
_stateHandlerFactory = new ProjectionStateHandlerFactory();
}
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);
}
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));
}