protected override Task configureUpdateBatch(ProjectionUpdateBatch batch, TenantedEventRange group,
CancellationToken token)
{
var tasks = group.Groups.Select(x => x.ApplyEvents(batch, _projection, Store, token)).ToArray();
return(Task.WhenAll(tasks));
}
public async Task ExecuteBatch(ProjectionUpdateBatch batch)
{
await batch.Queue.Completion;
using (var session = (DocumentSessionBase)_store.LightweightSession())
{
try
{
await session.ExecuteBatchAsync(batch, _cancellationSource.Token);
_logger.LogInformation($"Shard '{ProjectionOrShardName}': Executed updates for {batch.Range}");
}
catch (Exception e)
{
_logger.LogError(e, $"Failure in shard '{ProjectionOrShardName}' trying to execute an update batch for {batch.Range}");
// TODO -- error handling
throw;
}
}
batch.Dispose();
Position = batch.Range.SequenceCeiling;
_tracker.Publish(new ShardState(ProjectionOrShardName, batch.Range.SequenceCeiling));
_commandBlock.Post(Command.Completed(batch.Range));
}
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));
}
public async Task ExecuteBatch(ProjectionUpdateBatch batch)
{
if (_cancellation.IsCancellationRequested || batch == null)
{
return;
}
await batch.Queue.Completion.ConfigureAwait(false);
if (_cancellation.IsCancellationRequested)
{
return;
}
var session = (DocumentSessionBase)_store.OpenSession(_sessionOptions);
await using (session.ConfigureAwait(false))
{
try
{
await session.ExecuteBatchAsync(batch, _cancellation).ConfigureAwait(false);
_logger.LogInformation("Shard '{ProjectionShardIdentity}': Executed updates for {Range}", ProjectionShardIdentity, batch.Range);
}
catch (Exception e)
{
if (!_cancellation.IsCancellationRequested)
{
_logger.LogError(e,
"Failure in shard '{ProjectionShardIdentity}' trying to execute an update batch for {Range}", ProjectionShardIdentity,
batch.Range);
throw;
}
}
finally
{
batch.Dispose();
}
}
batch.Dispose();
if (_cancellation.IsCancellationRequested)
{
return;
}
Position = batch.Range.SequenceCeiling;
_tracker.Publish(new ShardState(ShardName, batch.Range.SequenceCeiling)
{
Action = ShardAction.Updated
});
_commandBlock.Post(Command.Completed(batch.Range));
}
public Task ApplyEvents(ProjectionUpdateBatch batch, IProjection projection, DocumentStore store,
CancellationToken cancellationToken)
{
return(Task.Run(async() =>
{
await using var operations = new ProjectionDocumentSession(store, _tenant, batch);
await projection.ApplyAsync(operations, _actions, cancellationToken);
}, cancellationToken));
}
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);
}
public async Task ExecuteBatch(ProjectionUpdateBatch batch)
{
if (_cancellation.IsCancellationRequested)
{
return;
}
await batch.Queue.Completion;
if (_cancellation.IsCancellationRequested)
{
return;
}
await using (var session = (DocumentSessionBase)_store.LightweightSession())
{
try
{
await session.ExecuteBatchAsync(batch, _cancellation);
_logger.LogInformation("Shard '{ShardName}': Executed updates for {Range}", ShardName, batch.Range);
}
catch (Exception e)
{
if (!_cancellation.IsCancellationRequested)
{
_logger.LogError(e, "Failure in shard '{ShardName}' trying to execute an update batch for {Range}", ShardName, batch.Range);
throw;
}
}
}
batch.Dispose();
if (_cancellation.IsCancellationRequested)
{
return;
}
Position = batch.Range.SequenceCeiling;
_tracker.Publish(new ShardState(ShardName, batch.Range.SequenceCeiling));
_commandBlock.Post(Command.Completed(batch.Range));
}
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);
});
}
protected abstract Task configureUpdateBatch(ProjectionUpdateBatch batch, T group, CancellationToken token);
public abstract Task ConfigureUpdateBatch(IShardAgent shardAgent, ProjectionUpdateBatch batch);
public abstract Task ConfigureUpdateBatch(IShardAgent shardAgent, ProjectionUpdateBatch batch,
EventRangeGroup eventRangeGroup);
public async Task ApplyEvents(ProjectionUpdateBatch batch, IProjection projection, DocumentStore store,
CancellationToken cancellationToken)
{
await using var operations = new ProjectionDocumentSession(store, batch, new SessionOptions { Tracking = DocumentTracking.None, Tenant = _tenant });
await projection.ApplyAsync(operations, _actions, cancellationToken).ConfigureAwait(false);
}
