[20815] Only apply content filter to ALIVE changes

src/cpp/CMakeLists.txt

@@ -158,6 +158,7 @@ set(${PROJECT_NAME}_source_files
     rtps/participant/RTPSParticipant.cpp
     rtps/participant/RTPSParticipantImpl.cpp
     rtps/persistence/PersistenceFactory.cpp
+    rtps/reader/reader_utils.cpp
     rtps/reader/RTPSReader.cpp
     rtps/reader/StatefulPersistentReader.cpp
     rtps/reader/StatefulReader.cpp

src/cpp/fastdds/publisher/filtering/ReaderFilterCollection.hpp

@@ -133,13 +133,17 @@ class ReaderFilterCollection
                         // Copy the signature
                         std::copy(entry.filter_signature.begin(), entry.filter_signature.end(), signature);
 
-                        // Evaluate filter and update filtered_out_readers
-                        bool filter_result = entry.filter->evaluate(change.serializedPayload, info, it->first);
-                        if (!filter_result)
+                        // Only evaluate filter on ALIVE changes, as UNREGISTERED and DISPOSED are always relevant
+                        bool filter_result = true;
+                        if (fastrtps::rtps::ALIVE == change.kind)
                         {
-                            change.filtered_out_readers.emplace_back(it->first);
+                            // Evaluate filter and update filtered_out_readers
+                            filter_result = entry.filter->evaluate(change.serializedPayload, info, it->first);
+                            if (!filter_result)
+                            {
+                                change.filtered_out_readers.emplace_back(it->first);
+                            }
                         }
-
                         return filter_result;
                     };
 

src/cpp/rtps/reader/StatefulReader.cpp

@@ -28,6 +28,8 @@
 #include <fastdds/rtps/history/ReaderHistory.h>
 #include <fastdds/rtps/reader/ReaderListener.h>
 
+#include "reader_utils.hpp"
+#include "rtps/RTPSDomainImpl.hpp"
 #include <rtps/builtin/BuiltinProtocols.h>
 #include <rtps/builtin/liveliness/WLP.h>
 #include <rtps/DataSharing/DataSharingListener.hpp>
@@ -37,9 +39,6 @@
 #include <rtps/participant/RTPSParticipantImpl.h>
 #include <rtps/reader/WriterProxy.h>
 #include <rtps/writer/LivelinessManager.hpp>
-
-#include "rtps/RTPSDomainImpl.hpp"
-
 #ifdef FASTDDS_STATISTICS
 #include <statistics/types/monitorservice_types.hpp>
 #endif // FASTDDS_STATISTICS
@@ -588,14 +587,15 @@ bool StatefulReader::processDataMsg(
                 return false;
             }
 
-            if (data_filter_ && !data_filter_->is_relevant(*change, m_guid))
+            if (!fastdds::rtps::change_is_relevant_for_filter(*change, m_guid, data_filter_))
             {
                 if (pWP)
                 {
                     pWP->irrelevant_change_set(change->sequenceNumber);
                     NotifyChanges(pWP);
                     send_ack_if_datasharing(this, mp_history, pWP, change->sequenceNumber);
                 }
+                // Change was filtered out, so there isn't anything else to do
                 return true;
             }
 
@@ -771,7 +771,8 @@ bool StatefulReader::processDataFragMsg(
 
                     // Temporarilly assign the inline qos while evaluating the data filter
                     work_change->inline_qos = incomingChange->inline_qos;
-                    bool filtered_out = data_filter_ && !data_filter_->is_relevant(*work_change, m_guid);
+                    bool filtered_out =
+                            !fastdds::rtps::change_is_relevant_for_filter(*work_change, m_guid, data_filter_);
                     work_change->inline_qos = SerializedPayload_t();
 
                     if (filtered_out)

src/cpp/rtps/reader/StatelessReader.cpp

@@ -27,16 +27,15 @@
 #include <fastdds/rtps/history/ReaderHistory.h>
 #include <fastdds/rtps/reader/ReaderListener.h>
 
+#include "reader_utils.hpp"
+#include "rtps/RTPSDomainImpl.hpp"
 #include <rtps/builtin/BuiltinProtocols.h>
 #include <rtps/builtin/liveliness/WLP.h>
 #include <rtps/DataSharing/DataSharingListener.hpp>
 #include <rtps/DataSharing/ReaderPool.hpp>
 #include <rtps/participant/RTPSParticipantImpl.h>
 #include <rtps/reader/StatelessReader.hpp>
 #include <rtps/writer/LivelinessManager.hpp>
-
-#include "rtps/RTPSDomainImpl.hpp"
-
 #ifdef FASTDDS_STATISTICS
 #include <statistics/types/monitorservice_types.hpp>
 #endif // FASTDDS_STATISTICS
@@ -582,9 +581,10 @@ bool StatelessReader::processDataMsg(
                 return false;
             }
 
-            if (data_filter_ && !data_filter_->is_relevant(*change, m_guid))
+            if (!fastdds::rtps::change_is_relevant_for_filter(*change, m_guid, data_filter_))
             {
                 update_last_notified(change->writerGUID, change->sequenceNumber);
+                // Change was filtered out, so there isn't anything else to do
                 return true;
             }
 
@@ -797,7 +797,8 @@ bool StatelessReader::processDataFragMsg(
                 {
                     // Temporarilly assign the inline qos while evaluating the data filter
                     change_completed->inline_qos = incomingChange->inline_qos;
-                    bool filtered_out = data_filter_ && !data_filter_->is_relevant(*change_completed, m_guid);
+                    bool filtered_out = !fastdds::rtps::change_is_relevant_for_filter(*change_completed, m_guid,
+                                    data_filter_);
                     change_completed->inline_qos = SerializedPayload_t();
 
                     if (filtered_out)

src/cpp/rtps/reader/reader_utils.cpp

@@ -0,0 +1,45 @@
+// Copyright 2024 Proyectos y Sistemas de Mantenimiento SL (eProsima).
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @file reader_utils.cpp
+ */
+
+#include "reader_utils.hpp"
+
+#include <fastdds/rtps/common/ChangeKind_t.hpp>
+
+namespace eprosima {
+namespace fastdds {
+namespace rtps {
+
+bool change_is_relevant_for_filter(
+        const CacheChange& change,
+        const GUID& reader_guid,
+        const IReaderDataFilter* filter)
+{
+    bool ret = true;
+
+    // Only evaluate filter on ALIVE changes, as UNREGISTERED and DISPOSED are always relevant
+    if ((nullptr != filter) && (fastrtps::rtps::ALIVE == change.kind) && (!filter->is_relevant(change, reader_guid)))
+    {
+        ret = false;
+    }
+
+    return ret;
+}
+
+} // namespace rtps
+} // namespace fastdds
+} // namespace eprosima

src/cpp/rtps/reader/reader_utils.hpp

@@ -0,0 +1,53 @@
+// Copyright 2024 Proyectos y Sistemas de Mantenimiento SL (eProsima).
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @file reader_utils.hpp
+ */
+
+#ifndef _FASTDDS_RTPS_READER_READERUTILS_H_
+#define _FASTDDS_RTPS_READER_READERUTILS_H_
+
+#include <fastdds/rtps/common/CacheChange.h>
+#include <fastdds/rtps/common/Guid.h>
+#include <fastdds/rtps/interfaces/IReaderDataFilter.hpp>
+#include <fastdds/rtps/common/ChangeKind_t.hpp>
+
+namespace eprosima {
+namespace fastdds {
+namespace rtps {
+
+using CacheChange = fastrtps::rtps::CacheChange_t;
+using GUID = fastrtps::rtps::GUID_t;
+
+/**
+ * @brief Check if a change is relevant for a reader.
+ *
+ * @param change The CacheChange_t to be evaluated.
+ * @param reader_guid Reader's GUID_t.
+ * @param filter The IReaderDataFilter to be used.
+ *
+ * @return true if relevant, false otherwise.
+ */
+bool change_is_relevant_for_filter(
+        const CacheChange& change,
+        const GUID& reader_guid,
+        const IReaderDataFilter* filter);
+
+} // namespace rtps
+} // namespace fastdds
+} // namespace eprosima
+
+
+#endif // _FASTDDS_RTPS_READER_READERUTILS_H_