private async Task<EventRangeGroup> groupEventRange(EventRange range)
{
if (_cancellation.IsCancellationRequested) return null;
EventRangeGroup group = null;
await TryAction(async () =>
{
if (_logger.IsEnabled(LogLevel.Debug))
{
_logger.LogDebug("Shard '{ShardName}':Starting to group {Range}", Name, range);
}
group = await _source.GroupEvents(_store, range, _cancellation);
if (_logger.IsEnabled(LogLevel.Debug))
{
_logger.LogDebug("Shard '{ShardName}': successfully grouped {Range}", Name, range);
}
}, _cancellation, (logger, e) =>
{
logger.LogError(e, "Error while trying to group event range {EventRange} for projection shard {ShardName}", range, Name);
});
return group;
}
private async Task <ProjectionUpdateBatch> buildUpdateBatch(EventRangeGroup @group)
{
if (group.Cancellation.IsCancellationRequested)
{
return(null); // get out of here early instead of letting it linger
}
using var batch = StartNewBatch(group);
await group.ConfigureUpdateBatch(this, batch, group);
if (group.Cancellation.IsCancellationRequested)
{
if (group.Exception != null)
{
ExceptionDispatchInfo.Capture(group.Exception).Throw();
}
return(batch); // get out of here early instead of letting it linger
}
batch.Queue.Complete();
await batch.Queue.Completion;
if (group.Exception != null)
{
ExceptionDispatchInfo.Capture(group.Exception).Throw();
}
return(batch);
}
private async Task <EventRangeGroup> groupEventRange(EventRange range)
{
if (_cancellation.IsCancellationRequested)
{
return(null);
}
EventRangeGroup group = null;
await TryAction(async() =>
{
if (_logger.IsEnabled(LogLevel.Debug))
{
_logger.LogDebug("Shard '{ProjectionShardIdentity}':Starting to group {Range}", ProjectionShardIdentity, range);
}
@group = await _source.GroupEvents(_store, _daemon.Database, range, _cancellation).ConfigureAwait(false);
if (_logger.IsEnabled(LogLevel.Debug))
{
_logger.LogDebug("Shard '{ProjectionShardIdentity}': successfully grouped {Range}", ProjectionShardIdentity, range);
}
}, _cancellation, (logger, e) =>
{
logger.LogError(e, "Error while trying to group event range {EventRange} for projection shard {SProjectionShardIdentity}", range, ProjectionShardIdentity);
}).ConfigureAwait(false);
return(group);
}
public override Task ConfigureUpdateBatch(IShardAgent shardAgent, ProjectionUpdateBatch batch,
EventRangeGroup eventRangeGroup)
{
var tasks = Groups
.Select(tenantGroup => tenantGroup.ApplyEvents(batch, _projection, _store, Cancellation)).ToArray();
return(Task.WhenAll(tasks));
}
private async Task processRange(EventRangeGroup group)
{
if (_cancellation.IsCancellationRequested)
{
return;
}
if (_logger.IsEnabled(LogLevel.Debug))
{
_logger.LogDebug("Shard '{ProjectionShardIdentity}': Starting to process events for {Group}", ProjectionShardIdentity, group);
}
// This should be done *once* here before going to the TryAction()
group.Reset();
ProjectionUpdateBatch batch = null;
// Building the ProjectionUpdateBatch
await TryAction(async() =>
{
batch = await buildUpdateBatch(@group).ConfigureAwait(false);
@group.Dispose();
}, _cancellation, (logger, e) =>
{
logger.LogError(e, "Failure while trying to process updates for event range {EventRange} for projection shard '{ProjectionShardIdentity}'", @group, ProjectionShardIdentity);
}, @group : @group).ConfigureAwait(false);
// This has failed, so get out of here.
if (batch == null)
{
return;
}
// Executing the SQL commands for the ProjectionUpdateBatch
await TryAction(async() =>
{
await ExecuteBatch(batch).ConfigureAwait(false);
if (_logger.IsEnabled(LogLevel.Debug))
{
_logger.LogDebug("Shard '{ProjectionShardIdentity}': Successfully processed batch {Group}", ProjectionShardIdentity, @group);
}
}, _cancellation, (logger, e) =>
{
logger.LogError(e, "Failure while trying to process updates for event range {EventRange} for projection shard '{ProjectionShardIdentity}'", @group, ProjectionShardIdentity);
}).ConfigureAwait(false);
}
private async Task processRange(EventRangeGroup group)
{
if (_cancellation.IsCancellationRequested)
{
return;
}
if (_logger.IsEnabled(LogLevel.Debug))
{
_logger.LogDebug("Shard '{ShardName}': Starting to process events for {Group}", Name, group);
}
// This should be done *once* here before going to the TryAction()
group.Reset();
ProjectionUpdateBatch batch = null;
// Building the ProjectionUpdateBatch
await TryAction(async() =>
{
batch = await buildUpdateBatch(@group);
group.Dispose();
}, _cancellation, (logger, e) =>
{
logger.LogError(e, "Failure while trying to process updates for event range {EventRange} for projection shard '{ShardName}'", group, Name);
}, group : group);
// Executing the SQL commands for the ProjectionUpdateBatch
await TryAction(async() =>
{
await ExecuteBatch(batch);
if (_logger.IsEnabled(LogLevel.Debug))
{
_logger.LogDebug("Shard '{ShardName}': Configured batch {Group}", Name, group);
}
}, _cancellation, (logger, e) =>
{
logger.LogError(e, "Failure while trying to process updates for event range {EventRange} for projection shard '{ShardName}'", group, Name);
});
}
private async Task <ProjectionUpdateBatch> buildUpdateBatch(EventRangeGroup @group)
{
if (group.Cancellation.IsCancellationRequested)
{
return(null); // get out of here early instead of letting it linger
}
var batch = StartNewBatch(group);
try
{
await @group.ConfigureUpdateBatch(this, batch, @group).ConfigureAwait(false);
if (group.Cancellation.IsCancellationRequested)
{
if (group.Exception != null)
{
ExceptionDispatchInfo.Capture(group.Exception).Throw();
}
return(batch); // get out of here early instead of letting it linger
}
batch.Queue.Complete();
await batch.Queue.Completion.ConfigureAwait(false);
if (group.Exception != null)
{
ExceptionDispatchInfo.Capture(group.Exception).Throw();
}
}
finally
{
if (batch != null)
{
await batch.CloseSession().ConfigureAwait(false);
}
}
return(batch);
}
public ProjectionUpdateBatch StartNewBatch(EventRangeGroup group)
{
var session = _store.LightweightSession();
return new ProjectionUpdateBatch(_store.Events, (DocumentSessionBase) session, group.Range, group.Cancellation);
}
public Task TryAction(Func<Task> action, CancellationToken token, Action<ILogger, Exception> logException = null, EventRangeGroup group = null, GroupActionMode actionMode = GroupActionMode.Parent)
{
var parameters = new ActionParameters(this, action, token == default ? _cancellation : token)
{
GroupActionMode = actionMode
};
parameters.LogAction = logException ?? parameters.LogAction;
parameters.Group = group;
return _daemon.TryAction(parameters);
}
public abstract Task ConfigureUpdateBatch(IShardAgent shardAgent, ProjectionUpdateBatch batch,
EventRangeGroup eventRangeGroup);
public ProjectionUpdateBatch StartNewBatch(EventRangeGroup group)
{
var session = _store.OpenSession(_sessionOptions);
return(new ProjectionUpdateBatch(_store.Events, (DocumentSessionBase)session, group.Range, group.Cancellation));
}