public async Task SyncGroupAsync(CancellationToken cancellationToken)
{
if (_disposeCount > 0)
{
throw new ObjectDisposedException($"Consumer {{GroupId:{GroupId},MemberId:{MemberId}}} is no longer valid");
}
var groupAssignments = await _joinSemaphore.LockAsync(
async() => {
if (IsLeader)
{
var encoder = Encoders[ProtocolType];
var assigner = encoder.GetAssignor(_groupProtocol);
var assignments = await assigner.AssignMembersAsync(Router, GroupId, GenerationId, _memberMetadata, cancellationToken).ConfigureAwait(false);
return(assignments.Select(pair => new SyncGroupRequest.GroupAssignment(pair.Key, pair.Value)));
}
return(null);
}, _disposeToken.Token).ConfigureAwait(false);
await Task.WhenAll(_batches.Values.Select(b => b.CommitMarkedIgnoringDisposedAsync(cancellationToken))).ConfigureAwait(false);
SyncGroupResponse response;
try {
var request = new SyncGroupRequest(GroupId, GenerationId, MemberId, groupAssignments);
response = await Router.SyncGroupAsync(request, new RequestContext(protocolType : ProtocolType), Configuration.GroupCoordinationRetry, cancellationToken).ConfigureAwait(false);
} catch (RequestException ex) {
switch (ex.ErrorCode)
{
case ErrorCode.REBALANCE_IN_PROGRESS:
Router.Log.Info(() => LogEvent.Create(ex.Message));
TriggerRejoin();
return;
case ErrorCode.GROUP_AUTHORIZATION_FAILED:
case ErrorCode.UNKNOWN_MEMBER_ID:
Router.Log.Warn(() => LogEvent.Create(ex));
_leaveOnDispose = false; // no point in attempting to leave the group since it will fail
_disposeToken.Cancel();
break;
}
throw;
}
_syncSemaphore.Lock(() => {
_assignment = response.member_assignment;
var validPartitions = response.member_assignment.PartitionAssignments.ToImmutableHashSet();
var invalidPartitions = _batches.Where(pair => !validPartitions.Contains(pair.Key)).ToList();
foreach (var invalidPartition in invalidPartitions)
{
invalidPartition.Value.Dispose();
}
_batches = _batches.RemoveRange(invalidPartitions.Select(pair => pair.Key));
}, _disposeToken.Token);
if (Interlocked.Increment(ref _syncCount) == 1)
{
_fetchSemaphore.Release();
}
}
public SyncGroupResponse(ErrorCode errorCode, IMemberAssignment memberAssignment)
{
error_code = errorCode;
Errors = ImmutableList <ErrorCode> .Empty.Add(error_code);
member_assignment = memberAssignment;
}
public Member(string memberId, string clientId, string clientHost, IMemberMetadata memberMetadata, IMemberAssignment memberAssignment)
{
MemberId = memberId;
ClientId = clientId;
ClientHost = clientHost;
MemberMetadata = memberMetadata;
MemberAssignment = memberAssignment;
}
public Member(string memberId, string clientId, string clientHost, IMemberMetadata memberMetadata, IMemberAssignment memberAssignment)
{
member_id = memberId;
client_id = clientId;
client_host = clientHost;
member_metadata = memberMetadata;
member_assignment = memberAssignment;
}
public async Task DisposeAsync()
{
if (Interlocked.Increment(ref _disposeCount) != 1)
{
await _disposePromise.Task;
return;
}
try {
Router.Log.Debug(() => LogEvent.Create($"Disposing Consumer {{GroupId:{GroupId},MemberId:{MemberId}}}"));
_disposeToken.Cancel();
_fetchSemaphore.Dispose();
_joinSemaphore.Dispose();
_syncSemaphore.Dispose();
try {
var batches = Interlocked.Exchange(ref _batches, ImmutableDictionary <TopicPartition, IMessageBatch> .Empty);
await Task.WhenAll(batches.Values.Select(b => b.CommitMarkedAsync(CancellationToken.None))).ConfigureAwait(false);
foreach (var batch in batches.Values)
{
batch.Dispose();
}
} catch (Exception ex) {
Router.Log.Info(() => LogEvent.Create(ex));
}
_assignment = null;
try {
await Task.WhenAny(_heartbeatTask, _stateChangeTask, Task.Delay(TimeSpan.FromSeconds(1), CancellationToken.None)).ConfigureAwait(false);
if (_leaveOnDispose)
{
var request = new LeaveGroupRequest(GroupId, MemberId);
await Router.SendAsync(request, GroupId, CancellationToken.None, retryPolicy : Retry.None).ConfigureAwait(false);
}
} catch (Exception ex) {
Router.Log.Info(() => LogEvent.Create(ex));
}
if (!_leaveRouterOpen)
{
await Router.DisposeAsync();
}
_disposeToken.Dispose();
} finally {
_disposePromise.TrySetResult(true);
}
}
public MemberHandler(IMemberAssignment assignment) => _assignment = assignment;
/// <inheritdoc />
public void EncodeAssignment(IKafkaWriter writer, IMemberAssignment value)
{
using (writer.MarkForLength()) {
EncodeAssignment(writer, (TAssignment)value);
}
}
public GroupAssignment(string memberId, IMemberAssignment memberAssignment)
{
member_id = memberId;
member_assignment = memberAssignment;
}
public static IKafkaWriter Write(this IKafkaWriter writer, IMemberAssignment assignment, IProtocolTypeEncoder encoder)
{
encoder.EncodeAssignment(writer, assignment);
return(writer);
}
public GroupAssignment(string memberId, IMemberAssignment memberAssignment)
{
MemberId = memberId;
MemberAssignment = memberAssignment;
}
/// <inheritdoc />
public void EncodeAssignment(IKafkaWriter writer, IMemberAssignment value)
{
EncodeAssignment(writer, (TAssignment)value);
}