public async Task StartShard(IAsyncProjectionShard shard, CancellationToken cancellationToken)
{
if (!_hasStarted)
{
StartNode();
}
// Don't duplicate the shard
if (_agents.ContainsKey(shard.Name.Identity))
{
return;
}
await TryAction(null, async() =>
{
try
{
var agent = new ProjectionAgent(_store, shard, _logger, cancellationToken);
var position = await agent.Start(this);
Tracker.Publish(new ShardState(shard.Name, position)
{
Action = ShardAction.Started
});
_agents[shard.Name.Identity] = agent;
}
catch (Exception e)
{
_logger.LogError(e, "Error when trying to start projection shard '{ShardName}'", shard.Name.Identity);
throw new ShardStartException(shard.Name, e);
}
}, cancellationToken);
}
public async Task StartShard(IAsyncProjectionShard shard)
{
if (!_hasStarted)
{
StartNode();
}
// TODO -- log the start, or error if it fails
var agent = new ProjectionAgent(_store, shard, _logger);
var position = await agent.Start(Tracker);
Tracker.Publish(new ShardState(shard.ProjectionOrShardName, position)
{
Action = ShardAction.Started
});
_agents[shard.ProjectionOrShardName] = agent;
}