fix #639 fix semantics of topicOfInterest

cpp/.gitignore

@@ -18,3 +18,4 @@ bazel-rocketmq-client-cpp
 /bazel-*
 /compile_commands.json
 /.cache/
+.clangd

cpp/source/rocketmq/Producer.cpp

@@ -88,7 +88,7 @@ ProducerBuilder& ProducerBuilder::withConfiguration(Configuration configuration)
 }
 
 ProducerBuilder& ProducerBuilder::withTopics(const std::vector<std::string>& topics) {
-  impl_->topicsOfInterest(topics);
+  impl_->withTopics(topics);
   return *this;
 }
 

cpp/source/rocketmq/ProducerImpl.cpp

@@ -16,6 +16,7 @@
  */
 #include "ProducerImpl.h"
 
+#include <algorithm>
 #include <apache/rocketmq/v2/definition.pb.h>
 
 #include <atomic>
@@ -575,9 +576,22 @@ void ProducerImpl::onOrphanedTransactionalMessage(MessageConstSharedPtr message)
   }
 }
 
-void ProducerImpl::topicsOfInterest(std::vector<std::string> topics) {
+void ProducerImpl::topicsOfInterest(std::vector<std::string> &topics) {
   absl::MutexLock lk(&topics_mtx_);
-  topics_.swap(topics);
+  for (auto& topic : topics_) {
+    if (std::find(topics.begin(), topics.end(), topic) == topics.end()) {
+      topics.push_back(topic);
+    }
+  }
+}
+
+void ProducerImpl::withTopics(const std::vector<std::string> &topics) {
+  absl::MutexLock lk(&topics_mtx_);
+  for (auto &topic: topics) {
+    if (std::find(topics_.begin(), topics_.end(), topic) == topics_.end()) {
+      topics_.push_back(topic);
+    }
+  }
 }
 
 void ProducerImpl::buildClientSettings(rmq::Settings& settings) {

cpp/source/rocketmq/PushConsumerImpl.cpp

@@ -47,7 +47,7 @@ PushConsumerImpl::~PushConsumerImpl() {
   shutdown();
 }
 
-void PushConsumerImpl::topicsOfInterest(std::vector<std::string> topics) {
+void PushConsumerImpl::topicsOfInterest(std::vector<std::string> &topics) {
   absl::MutexLock lk(&topic_filter_expression_table_mtx_);
   for (const auto& entry : topic_filter_expression_table_) {
     topics.push_back(entry.first);

cpp/source/rocketmq/SimpleConsumerImpl.cpp

@@ -67,7 +67,7 @@ void SimpleConsumerImpl::buildClientSettings(rmq::Settings& settings) {
   }
 }
 
-void SimpleConsumerImpl::topicsOfInterest(std::vector<std::string> topics) {
+void SimpleConsumerImpl::topicsOfInterest(std::vector<std::string> &topics) {
   absl::MutexLock lk(&subscriptions_mtx_);
   for (const auto& entry : subscriptions_) {
     if (std::find(topics.begin(), topics.end(), entry.first) == topics.end()) {

cpp/source/rocketmq/include/ClientImpl.h

@@ -167,7 +167,7 @@ class ClientImpl : virtual public Client {
   absl::flat_hash_map<std::string, std::unique_ptr<Session>> session_map_ GUARDED_BY(session_map_mtx_);
   absl::Mutex session_map_mtx_;
 
-  virtual void topicsOfInterest(std::vector<std::string> topics) {
+  virtual void topicsOfInterest(std::vector<std::string> &topics) {
   }
 
   void updateRouteInfo() LOCKS_EXCLUDED(topic_route_table_mtx_);

cpp/source/rocketmq/include/ProducerImpl.h

@@ -107,7 +107,9 @@ class ProducerImpl : virtual public ClientImpl, public std::enable_shared_from_t
 
   void buildClientSettings(rmq::Settings& settings) override;
 
-  void topicsOfInterest(std::vector<std::string> topics) override LOCKS_EXCLUDED(topics_mtx_);
+  void topicsOfInterest(std::vector<std::string> &topics) override LOCKS_EXCLUDED(topics_mtx_);
+
+  void withTopics(const std::vector<std::string> &topics) LOCKS_EXCLUDED(topics_mtx_);
 
   const PublishStats& stats() const {
     return stats_;

cpp/source/rocketmq/include/PushConsumerImpl.h

@@ -52,7 +52,7 @@ class PushConsumerImpl : virtual public ClientImpl, public std::enable_shared_fr
 
   void prepareHeartbeatData(HeartbeatRequest& request) override;
 
-  void topicsOfInterest(std::vector<std::string> topics) override LOCKS_EXCLUDED(topic_filter_expression_table_mtx_);
+  void topicsOfInterest(std::vector<std::string> &topics) override LOCKS_EXCLUDED(topic_filter_expression_table_mtx_);
 
   void start() override;
 

cpp/source/rocketmq/include/SimpleConsumerImpl.h

@@ -66,7 +66,7 @@ class SimpleConsumerImpl : public ClientImpl, public std::enable_shared_from_thi
   }
 
 protected:
-  void topicsOfInterest(std::vector<std::string> topics) override;
+  void topicsOfInterest(std::vector<std::string> &topics) override;
 
 private:
   absl::flat_hash_map<std::string, FilterExpression> subscriptions_ GUARDED_BY(subscriptions_mtx_);