From 24eae22a6dca53c86ffbb77a942e7f2dac840df0 Mon Sep 17 00:00:00 2001
From: Pisarenko Grigoriy <grigoriypisar@ydb.tech>
Date: Fri, 26 Sep 2025 17:37:57 +0500
Subject: YQ-4664 used AS threads in topic sdk IO operations (#25668)

---
 ydb/core/fq/libs/row_dispatcher/topic_session.cpp  | 28 ++++++---
 ydb/core/fq/libs/row_dispatcher/ya.make            |  1 +
 .../yql/providers/pq/async_io/dq_pq_read_actor.cpp | 53 +++++++++-------
 .../providers/pq/async_io/dq_pq_write_actor.cpp    | 38 ++++++-----
 .../yql/providers/pq/common/pq_events_processor.h  | 73 ++++++++++++++++++++++
 ydb/library/yql/providers/pq/common/ya.make        |  2 +
 6 files changed, 146 insertions(+), 49 deletions(-)
 create mode 100644 ydb/library/yql/providers/pq/common/pq_events_processor.h

diff --git a/ydb/core/fq/libs/row_dispatcher/topic_session.cpp b/ydb/core/fq/libs/row_dispatcher/topic_session.cpp
index dd5b739c495..635c349deaa 100644
--- a/ydb/core/fq/libs/row_dispatcher/topic_session.cpp
+++ b/ydb/core/fq/libs/row_dispatcher/topic_session.cpp
@@ -5,13 +5,11 @@
 #include <ydb/core/fq/libs/row_dispatcher/events/data_plane.h>
 #include <ydb/core/fq/libs/row_dispatcher/format_handler/format_handler.h>
 #include <ydb/core/protos/config.pb.h>
-
 #include <ydb/library/actors/core/actor_bootstrapped.h>
 #include <ydb/library/actors/core/hfunc.h>
 #include <ydb/library/yql/dq/actors/dq.h>
-
+#include <ydb/library/yql/providers/pq/common/pq_events_processor.h>
 #include <ydb/public/sdk/cpp/adapters/issue/issue.h>
-
 #include <ydb/public/sdk/cpp/include/ydb-cpp-sdk/client/topic/client.h>
 
 #include <util/generic/queue.h>
@@ -62,6 +60,7 @@ struct TEvPrivate {
         EvCreateSession,
         EvSendStatistic,
         EvReconnectSession,
+        EvExecuteTopicEvent,
         EvEnd
     };
     static_assert(EvEnd < EventSpaceEnd(TEvents::ES_PRIVATE), "expect EvEnd < EventSpaceEnd(TEvents::ES_PRIVATE)");
@@ -71,13 +70,16 @@ struct TEvPrivate {
     struct TEvCreateSession : public TEventLocal<TEvCreateSession, EvCreateSession> {};
     struct TEvSendStatistic : public TEventLocal<TEvSendStatistic, EvSendStatistic> {};
     struct TEvReconnectSession : public TEventLocal<TEvReconnectSession, EvReconnectSession> {};
+    struct TEvExecuteTopicEvent : public NYql::TTopicEventBase<TEvExecuteTopicEvent, EvExecuteTopicEvent> {
+        using TTopicEventBase::TTopicEventBase;
+    };
 };
 
 constexpr ui64 SendStatisticPeriodSec = 2;
 constexpr ui64 MaxHandledEventsCount = 1000;
 constexpr ui64 MaxHandledEventsSize = 1000000;
 
-class TTopicSession : public TActorBootstrapped<TTopicSession> {
+class TTopicSession : public TActorBootstrapped<TTopicSession>, NYql::TTopicEventProcessor<TEvPrivate::TEvExecuteTopicEvent> {
 private:
     using TBase = TActorBootstrapped<TTopicSession>;
 
@@ -315,7 +317,7 @@ public:
     [[maybe_unused]] static constexpr char ActorName[] = "FQ_ROW_DISPATCHER_SESSION";
 
 private:
-    NYdb::NTopic::TTopicClientSettings GetTopicClientSettings(bool useSsl) const;
+    NYdb::NTopic::TTopicClientSettings GetTopicClientSettings(bool useSsl);
     NYql::ITopicClient& GetTopicClient(bool useSsl);
     NYdb::NTopic::TReadSessionSettings GetReadSessionSettings(const TString& consumerName) const;
     void CreateTopicSession();
@@ -351,6 +353,7 @@ private:
 private:
 
     STRICT_STFUNC_EXC(StateFunc,
+        hFunc(TEvPrivate::TEvExecuteTopicEvent, HandleTopicEvent);
         hFunc(NFq::TEvPrivate::TEvPqEventsReady, Handle);
         hFunc(NFq::TEvPrivate::TEvCreateSession, Handle);
         hFunc(NFq::TEvPrivate::TEvSendStatistic, Handle);
@@ -364,6 +367,7 @@ private:
 
     STRICT_STFUNC_EXC(ErrorState,
         cFunc(TEvents::TEvPoisonPill::EventType, PassAway);
+        hFunc(TEvPrivate::TEvExecuteTopicEvent, HandleTopicEvent);
         IgnoreFunc(NFq::TEvPrivate::TEvPqEventsReady);
         IgnoreFunc(NFq::TEvPrivate::TEvCreateSession);
         IgnoreFunc(TEvRowDispatcher::TEvGetNextBatch);
@@ -446,12 +450,16 @@ void TTopicSession::SubscribeOnNextEvent() {
     });
 }
 
-NYdb::NTopic::TTopicClientSettings TTopicSession::GetTopicClientSettings(bool useSsl) const {
-    return PqGateway->GetTopicClientSettings()
-        .Database(Database)
+NYdb::NTopic::TTopicClientSettings TTopicSession::GetTopicClientSettings(bool useSsl) {
+    auto opts = PqGateway->GetTopicClientSettings();
+    SetupTopicClientSettings(ActorContext().ActorSystem(), SelfId(), opts);
+
+    opts.Database(Database)
         .DiscoveryEndpoint(Endpoint)
         .SslCredentials(NYdb::TSslCredentials(useSsl))
         .CredentialsProviderFactory(CredentialsProviderFactory);
+
+    return opts;
 }
 
 NYql::ITopicClient& TTopicSession::GetTopicClient(bool useSsl) {
@@ -983,7 +991,7 @@ void TTopicSession::RefreshParsers() {
     }
 }
 
-}  // anonymous namespace
+} // anonymous namespace
 
 ////////////////////////////////////////////////////////////////////////////////
 
@@ -1006,4 +1014,4 @@ std::unique_ptr<IActor> NewTopicSession(
     return std::unique_ptr<IActor>(new TTopicSession(readGroup, topicPath, endpoint, database, config, functionRegistry, rowDispatcherActorId, compileServiceActorId, partitionId, std::move(driver), credentialsProviderFactory, counters, countersRoot, pqGateway, maxBufferSize));
 }
 
-}  // namespace NFq
+} // namespace NFq
diff --git a/ydb/core/fq/libs/row_dispatcher/ya.make b/ydb/core/fq/libs/row_dispatcher/ya.make
index 73a6aad5493..f5ce290ff23 100644
--- a/ydb/core/fq/libs/row_dispatcher/ya.make
+++ b/ydb/core/fq/libs/row_dispatcher/ya.make
@@ -29,6 +29,7 @@ PEERDIR(
     ydb/library/yql/dq/actors/common
     ydb/library/yql/dq/actors/compute
     ydb/library/yql/dq/proto
+    ydb/library/yql/providers/pq/common
     ydb/library/yql/providers/pq/provider
 
     ydb/public/sdk/cpp/adapters/issue
diff --git a/ydb/library/yql/providers/pq/async_io/dq_pq_read_actor.cpp b/ydb/library/yql/providers/pq/async_io/dq_pq_read_actor.cpp
index cf91eef3065..c8d5c4f489a 100644
--- a/ydb/library/yql/providers/pq/async_io/dq_pq_read_actor.cpp
+++ b/ydb/library/yql/providers/pq/async_io/dq_pq_read_actor.cpp
@@ -1,47 +1,44 @@
 #include "dq_pq_read_actor.h"
+#include "dq_pq_meta_extractor.h"
+#include "dq_pq_rd_read_actor.h"
+#include "dq_pq_read_actor_base.h"
 #include "probes.h"
 
+#include <ydb/core/fq/libs/row_dispatcher/events/data_plane.h>
+#include <ydb/library/actors/core/actor.h>
+#include <ydb/library/actors/core/event_local.h>
+#include <ydb/library/actors/core/events.h>
+#include <ydb/library/actors/core/hfunc.h>
+#include <ydb/library/actors/core/log.h>
+#include <ydb/library/actors/log_backend/actor_log_backend.h>
 #include <ydb/library/yql/dq/actors/compute/dq_compute_actor_async_io_factory.h>
 #include <ydb/library/yql/dq/actors/compute/dq_compute_actor_async_io.h>
 #include <ydb/library/yql/dq/actors/compute/dq_source_watermark_tracker.h>
 #include <ydb/library/yql/dq/actors/protos/dq_events.pb.h>
 #include <ydb/library/yql/dq/common/dq_common.h>
 #include <ydb/library/yql/dq/actors/compute/dq_checkpoints_states.h>
-
-#include <yql/essentials/minikql/comp_nodes/mkql_saveload.h>
-#include <yql/essentials/minikql/mkql_alloc.h>
-#include <yql/essentials/minikql/mkql_string_util.h>
-#include <ydb/library/yql/providers/pq/async_io/dq_pq_meta_extractor.h>
-#include <ydb/library/yql/providers/pq/async_io/dq_pq_rd_read_actor.h>
-#include <ydb/library/yql/providers/pq/async_io/dq_pq_read_actor_base.h>
+#include <ydb/library/yql/providers/pq/common/pq_events_processor.h>
 #include <ydb/library/yql/providers/pq/common/pq_meta_fields.h>
 #include <ydb/library/yql/providers/pq/common/pq_partition_key.h>
 #include <ydb/library/yql/providers/pq/proto/dq_io_state.pb.h>
-#include <yql/essentials/utils/log/log.h>
-#include <yql/essentials/utils/yql_panic.h>
-
+#include <ydb/public/sdk/cpp/adapters/issue/issue.h>
 #include <ydb/public/sdk/cpp/include/ydb-cpp-sdk/client/federated_topic/federated_topic.h>
 #include <ydb/public/sdk/cpp/include/ydb-cpp-sdk/client/topic/client.h>
 #include <ydb/public/sdk/cpp/include/ydb-cpp-sdk/client/types/credentials/credentials.h>
 
-#include <ydb/library/actors/core/actor.h>
-#include <ydb/library/actors/core/event_local.h>
-#include <ydb/library/actors/core/events.h>
-#include <ydb/library/actors/core/hfunc.h>
-#include <ydb/library/actors/core/log.h>
-#include <ydb/library/actors/log_backend/actor_log_backend.h>
-#include <library/cpp/lwtrace/mon/mon_lwtrace.h>
-
-#include <ydb/core/fq/libs/row_dispatcher/events/data_plane.h>
+#include <yql/essentials/minikql/comp_nodes/mkql_saveload.h>
+#include <yql/essentials/minikql/mkql_alloc.h>
+#include <yql/essentials/minikql/mkql_string_util.h>
+#include <yql/essentials/utils/log/log.h>
+#include <yql/essentials/utils/yql_panic.h>
 
-#include <ydb/public/sdk/cpp/adapters/issue/issue.h>
+#include <library/cpp/lwtrace/mon/mon_lwtrace.h>
 
 #include <util/generic/algorithm.h>
 #include <util/generic/hash.h>
 #include <util/generic/utility.h>
 #include <util/string/join.h>
 
-
 #include <queue>
 #include <variant>
 
@@ -81,6 +78,7 @@ struct TEvPrivate {
         EvReconnectSession,
         EvReceivedClusters,
         EvDescribeTopicResult,
+        EvExecuteTopicEvent,
 
         EvEnd
     };
@@ -116,10 +114,14 @@ struct TEvPrivate {
         ui32 PartitionsCount;
         TMaybe<NYdb::TStatus> Status;
     };
+    struct TEvExecuteTopicEvent : public TTopicEventBase<TEvExecuteTopicEvent, EvExecuteTopicEvent> {
+        using TTopicEventBase::TTopicEventBase;
+    };
 };
 
-} // namespace
-class TDqPqReadActor : public NActors::TActor<TDqPqReadActor>, public NYql::NDq::NInternal::TDqPqReadActorBase  {
+} // anonymous namespace
+
+class TDqPqReadActor : public NActors::TActor<TDqPqReadActor>, public NYql::NDq::NInternal::TDqPqReadActorBase, TTopicEventProcessor<TEvPrivate::TEvExecuteTopicEvent> {
     static constexpr bool StaticDiscovery = true;
     struct TMetrics {
         TMetrics(
@@ -232,8 +234,10 @@ public:
         return opts;
     }
 
-    NYdb::NTopic::TTopicClientSettings GetTopicClientSettings(TClusterState& state) const {
+    NYdb::NTopic::TTopicClientSettings GetTopicClientSettings(TClusterState& state) {
         NYdb::NTopic::TTopicClientSettings opts = PqGateway->GetTopicClientSettings();
+        SetupTopicClientSettings(ActorContext().ActorSystem(), SelfId(), opts);
+
         opts.Database(SourceParams.GetDatabase())
             .DiscoveryEndpoint(SourceParams.GetEndpoint())
             .SslCredentials(NYdb::TSslCredentials(SourceParams.GetUseSsl()))
@@ -330,6 +334,7 @@ private:
         hFunc(TEvPrivate::TEvReconnectSession, Handle);
         hFunc(TEvPrivate::TEvReceivedClusters, Handle);
         hFunc(TEvPrivate::TEvDescribeTopicResult, Handle);
+        hFunc(TEvPrivate::TEvExecuteTopicEvent, HandleTopicEvent);
     )
 
     void Handle(TEvPrivate::TEvSourceDataReady::TPtr& ev) {
diff --git a/ydb/library/yql/providers/pq/async_io/dq_pq_write_actor.cpp b/ydb/library/yql/providers/pq/async_io/dq_pq_write_actor.cpp
index 56c422a6f96..3590f3eeb22 100644
--- a/ydb/library/yql/providers/pq/async_io/dq_pq_write_actor.cpp
+++ b/ydb/library/yql/providers/pq/async_io/dq_pq_write_actor.cpp
@@ -1,27 +1,27 @@
 #include "dq_pq_write_actor.h"
 #include "probes.h"
 
+#include <ydb/library/actors/core/actor.h>
+#include <ydb/library/actors/core/event_local.h>
+#include <ydb/library/actors/core/events.h>
+#include <ydb/library/actors/core/hfunc.h>
+#include <ydb/library/actors/core/log.h>
+#include <ydb/library/yql/dq/actors/compute/dq_checkpoints_states.h>
 #include <ydb/library/yql/dq/actors/compute/dq_compute_actor_async_io.h>
 #include <ydb/library/yql/dq/actors/protos/dq_events.pb.h>
 #include <ydb/library/yql/dq/common/dq_common.h>
-#include <ydb/library/yql/dq/actors/compute/dq_checkpoints_states.h>
+#include <ydb/library/yql/providers/pq/common/pq_events_processor.h>
+#include <ydb/library/yql/providers/pq/proto/dq_io_state.pb.h>
+#include <ydb/public/sdk/cpp/include/ydb-cpp-sdk/client/topic/client.h>
+#include <ydb/public/sdk/cpp/include/ydb-cpp-sdk/client/federated_topic/federated_topic.h>
+#include <ydb/public/sdk/cpp/include/ydb-cpp-sdk/client/types/credentials/credentials.h>
 
-#include <yql/essentials/utils/log/log.h>
 #include <yql/essentials/minikql/comp_nodes/mkql_saveload.h>
 #include <yql/essentials/minikql/mkql_alloc.h>
 #include <yql/essentials/minikql/mkql_string_util.h>
-#include <ydb/library/yql/providers/pq/proto/dq_io_state.pb.h>
+#include <yql/essentials/utils/log/log.h>
 #include <yql/essentials/utils/yql_panic.h>
 
-#include <ydb/public/sdk/cpp/include/ydb-cpp-sdk/client/topic/client.h>
-#include <ydb/public/sdk/cpp/include/ydb-cpp-sdk/client/federated_topic/federated_topic.h>
-#include <ydb/public/sdk/cpp/include/ydb-cpp-sdk/client/types/credentials/credentials.h>
-
-#include <ydb/library/actors/core/actor.h>
-#include <ydb/library/actors/core/event_local.h>
-#include <ydb/library/actors/core/events.h>
-#include <ydb/library/actors/core/hfunc.h>
-#include <ydb/library/actors/core/log.h>
 #include <library/cpp/lwtrace/mon/mon_lwtrace.h>
 
 #include <util/generic/algorithm.h>
@@ -78,6 +78,7 @@ struct TEvPrivate {
         EvBegin = EventSpaceBegin(NActors::TEvents::ES_PRIVATE),
 
         EvPqEventsReady = EvBegin,
+        EvExecuteTopicEvent,
 
         EvEnd
     };
@@ -87,15 +88,19 @@ struct TEvPrivate {
     // Events
 
     struct TEvPqEventsReady : public TEventLocal<TEvPqEventsReady, EvPqEventsReady> {};
+
+    struct TEvExecuteTopicEvent : public TTopicEventBase<TEvExecuteTopicEvent, EvExecuteTopicEvent> {
+        using TTopicEventBase::TTopicEventBase;
+    };
 };
 
 TString MakeStringForLog(const NDqProto::TCheckpoint& checkpoint) {
     return TStringBuilder() << "[Checkpoint " << checkpoint.GetGeneration() << "." << checkpoint.GetId() << "] ";
 }
 
-} // namespace
+} // anonymous namespace
 
-class TDqPqWriteActor : public NActors::TActor<TDqPqWriteActor>, public IDqComputeActorAsyncOutput {
+class TDqPqWriteActor : public NActors::TActor<TDqPqWriteActor>, public IDqComputeActorAsyncOutput, TTopicEventProcessor<TEvPrivate::TEvExecuteTopicEvent> {
     struct TMetrics {
         TMetrics(const TTxId& txId, ui64 taskId, const ::NMonitoring::TDynamicCounterPtr& counters)
             : TxId(std::visit([](auto arg) { return ToString(arg); }, txId))
@@ -282,6 +287,7 @@ public:
 private:
     STRICT_STFUNC(StateFunc,
         hFunc(TEvPrivate::TEvPqEventsReady, Handle);
+        hFunc(TEvPrivate::TEvExecuteTopicEvent, HandleTopicEvent);
     )
 
     void Handle(TEvPrivate::TEvPqEventsReady::TPtr&) {
@@ -329,8 +335,10 @@ private:
         return *FederatedTopicClient;
     }
 
-    NYdb::NFederatedTopic::TFederatedTopicClientSettings GetFederatedTopicClientSettings() const {
+    NYdb::NFederatedTopic::TFederatedTopicClientSettings GetFederatedTopicClientSettings() {
         NYdb::NFederatedTopic::TFederatedTopicClientSettings opts = PqGateway->GetFederatedTopicClientSettings();
+        SetupTopicClientSettings(ActorContext().ActorSystem(), SelfId(), opts);
+
         opts.Database(SinkParams.GetDatabase())
             .DiscoveryEndpoint(SinkParams.GetEndpoint())
             .SslCredentials(NYdb::TSslCredentials(SinkParams.GetUseSsl()))
diff --git a/ydb/library/yql/providers/pq/common/pq_events_processor.h b/ydb/library/yql/providers/pq/common/pq_events_processor.h
new file mode 100644
index 00000000000..ee013a27a3e
--- /dev/null
+++ b/ydb/library/yql/providers/pq/common/pq_events_processor.h
@@ -0,0 +1,73 @@
+#pragma once
+
+#include <ydb/library/actors/core/actorid.h>
+#include <ydb/library/actors/core/actorsystem.h>
+#include <ydb/public/sdk/cpp/include/ydb-cpp-sdk/client/topic/client.h>
+#include <ydb/public/sdk/cpp/include/ydb-cpp-sdk/client/topic/executor.h>
+
+namespace NYql {
+
+template <typename TEv, ui32 TEventType>
+class TTopicEventBase : public NActors::TEventLocal<TEv, TEventType> {
+public:
+    explicit TTopicEventBase(NYdb::NTopic::IExecutor::TFunction&& f)
+        : Function(std::move(f))
+    {}
+
+    void Execute() {
+        Function();
+    }
+
+private:
+    NYdb::NTopic::IExecutor::TFunction Function;
+};
+
+template <typename TTopicEvent>
+class TTopicEventProcessor {
+    class TEventProxy final : public NYdb::NTopic::IExecutor {
+    public:
+        TEventProxy(NActors::TActorSystem* actorSystem, const NActors::TActorId& executerId)
+            : ActorSystem(actorSystem)
+            , ExecuterId(executerId)
+        {
+            Y_ENSURE(actorSystem);
+        }
+
+        bool IsAsync() const final {
+            return true;
+        }
+
+        void Post(TFunction&& f) final {
+            ActorSystem->Send(ExecuterId, new TTopicEvent(std::move(f)));
+        }
+
+    private:
+        void DoStart() final {
+        }
+
+    private:
+        NActors::TActorSystem* ActorSystem = nullptr;
+        const NActors::TActorId ExecuterId;
+    };
+
+public:
+    template <typename TSettings>
+    void SetupTopicClientSettings(NActors::TActorSystem* actorSystem, const NActors::TActorId& selfId, TSettings& settings) {
+        if (!ExecuterProxy) {
+            ExecuterProxy = MakeIntrusive<TEventProxy>(actorSystem, selfId);
+        }
+
+        settings.DefaultHandlersExecutor(ExecuterProxy);
+        settings.DefaultCompressionExecutor(ExecuterProxy);
+    }
+
+protected:
+    void HandleTopicEvent(TTopicEvent::TPtr& event) {
+        event->Get()->Execute();
+    }
+
+private:
+    NYdb::NTopic::IExecutor::TPtr ExecuterProxy;
+};
+
+} // namespace NYql
diff --git a/ydb/library/yql/providers/pq/common/ya.make b/ydb/library/yql/providers/pq/common/ya.make
index e2dbc03f530..380338c2d62 100644
--- a/ydb/library/yql/providers/pq/common/ya.make
+++ b/ydb/library/yql/providers/pq/common/ya.make
@@ -7,6 +7,8 @@ SRCS(
 )
 
 PEERDIR(
+    ydb/library/actors/core
+    ydb/public/sdk/cpp/src/client/topic
     yql/essentials/public/types
 )
 
-- 
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