public void Handle(CoreProjectionManagementMessage.CreatePrepared message)
{
try
{
var name = message.Name;
var sourceDefinition = ProjectionSourceDefinition.From(message.SourceDefinition);
var projectionVersion = message.Version;
var projectionConfig = message.Config;
var namesBuilder = new ProjectionNamesBuilder(name, sourceDefinition);
var projectionProcessingStrategy = _processingStrategySelector.CreateProjectionProcessingStrategy(
name,
projectionVersion,
namesBuilder,
sourceDefinition,
projectionConfig,
null,
message.HandlerType,
message.Query);
CreateCoreProjection(message.ProjectionId, projectionConfig.RunAs, projectionProcessingStrategy);
_publisher.Publish(
new CoreProjectionStatusMessage.Prepared(
message.ProjectionId, sourceDefinition));
}
catch (Exception ex)
{
_publisher.Publish(
new CoreProjectionStatusMessage.Faulted(message.ProjectionId, ex.Message));
}
}
public void Handle(CoreProjectionManagementMessage.CreatePrepared message)
{
try
{
var name = message.Name;
var sourceDefinition = ProjectionSourceDefinition.From(
name, message.SourceDefinition, message.HandlerType, message.Query);
var projectionVersion = message.Version;
var projectionConfig = message.Config;
var namesBuilder = new ProjectionNamesBuilder(name, sourceDefinition);
var projectionProcessingStrategy = _processingStrategySelector.CreateProjectionProcessingStrategy(
name, projectionVersion, namesBuilder, sourceDefinition, projectionConfig, null, null);
var slaveProjections = projectionProcessingStrategy.GetSlaveProjections();
CreateCoreProjection(message.ProjectionId, projectionConfig.RunAs, projectionProcessingStrategy);
message.Envelope.ReplyWith(
new CoreProjectionManagementMessage.Prepared(
message.ProjectionId, sourceDefinition, slaveProjections));
}
catch (Exception ex)
{
message.Envelope.ReplyWith(
new CoreProjectionManagementMessage.Faulted(message.ProjectionId, ex.Message));
}
}
private void BeginCreatePrepared(ProjectionConfig config, Action onPrepared)
{
_onPrepared = onPrepared;
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
if (_persistedState.SourceDefinition == null)
{
throw new Exception(
"The projection cannot be loaded as stopped as it was stored in the old format. Update the projection query text to force prepare");
}
var createProjectionMessage =
new CoreProjectionManagementMessage.CreatePrepared(
new PublishEnvelope(_inputQueue), Id, _name,
new ProjectionVersion(_projectionId, _persistedState.Epoch ?? 0, _persistedState.Version ?? 1),
config, _persistedState.SourceDefinition, HandlerType, Query);
//note: set running before start as coreProjection.start() can respond with faulted
_state = ManagedProjectionState.Preparing;
_coreQueue.Publish(createProjectionMessage);
}
private CoreProjectionManagementMessage.CreatePrepared CreateBeginCreatePreparedMessage(ProjectionConfig config)
{
if (_persistedState.SourceDefinition == null)
{
throw new Exception(
"The projection cannot be loaded as stopped as it was stored in the old format. Update the projection query text to force prepare");
}
var createProjectionMessage = new CoreProjectionManagementMessage.CreatePrepared(
Id,
_workerId,
_name,
new ProjectionVersion(_projectionId, _persistedState.Epoch ?? 0, _persistedState.Version ?? 1),
config,
QuerySourcesDefinition.From(_persistedState.SourceDefinition),
HandlerType,
Query);
return(createProjectionMessage);
}
public void Handle(CoreProjectionManagementMessage.CreatePrepared message)
{
try
{
//TODO: factory method can throw!
// constructor can fail if wrong source defintion
ProjectionSourceDefinition sourceDefinition;
var projection = CoreProjection.CreatePrepared(
message.Name, message.Version, message.ProjectionId, _publisher, message.SourceDefinition, message.Config,
_readDispatcher, _writeDispatcher, _subscriptionDispatcher, _logger, _timeProvider, out sourceDefinition);
_projections.Add(message.ProjectionId, projection);
message.Envelope.ReplyWith(
new CoreProjectionManagementMessage.Prepared(message.ProjectionId, sourceDefinition));
}
catch (Exception ex)
{
message.Envelope.ReplyWith(
new CoreProjectionManagementMessage.Faulted(message.ProjectionId, ex.Message));
}
}
