refactor: Subscription Manager uses async framework (#1605)

Fix #1209

src/rpc/RPCEngine.hpp

@@ -44,9 +44,6 @@
 #include <utility>
 
 // forward declarations
-namespace feed {
-class SubscriptionManager;
-}  // namespace feed
 namespace etl {
 class LoadBalancer;
 class ETLService;

src/rpc/common/Types.hpp

@@ -43,9 +43,6 @@ class LoadBalancer;
 namespace web {
 struct ConnectionBase;
 }  // namespace web
-namespace feed {
-class SubscriptionManager;
-}  // namespace feed
 
 namespace rpc {
 

src/rpc/common/impl/HandlerProvider.cpp

@@ -22,7 +22,7 @@
 #include "data/AmendmentCenterInterface.hpp"
 #include "data/BackendInterface.hpp"
 #include "etl/ETLService.hpp"
-#include "feed/SubscriptionManager.hpp"
+#include "feed/SubscriptionManagerInterface.hpp"
 #include "rpc/Counters.hpp"
 #include "rpc/common/AnyHandler.hpp"
 #include "rpc/handlers/AMMInfo.hpp"
@@ -70,7 +70,7 @@ namespace rpc::impl {
 ProductionHandlerProvider::ProductionHandlerProvider(
     util::Config const& config,
     std::shared_ptr<BackendInterface> const& backend,
-    std::shared_ptr<feed::SubscriptionManager> const& subscriptionManager,
+    std::shared_ptr<feed::SubscriptionManagerInterface> const& subscriptionManager,
     std::shared_ptr<etl::LoadBalancer> const& balancer,
     std::shared_ptr<etl::ETLService const> const& etl,
     std::shared_ptr<data::AmendmentCenterInterface const> const& amendmentCenter,

src/rpc/common/impl/HandlerProvider.hpp

@@ -21,7 +21,7 @@
 
 #include "data/AmendmentCenterInterface.hpp"
 #include "data/BackendInterface.hpp"
-#include "feed/SubscriptionManager.hpp"
+#include "feed/SubscriptionManagerInterface.hpp"
 #include "rpc/common/AnyHandler.hpp"
 #include "rpc/common/HandlerProvider.hpp"
 #include "rpc/common/Types.hpp"
@@ -39,9 +39,6 @@ class LoadBalancer;
 namespace rpc {
 class Counters;
 }  // namespace rpc
-namespace feed {
-class SubscriptionManager;
-}  // namespace feed
 
 namespace rpc::impl {
 
@@ -57,7 +54,7 @@ public:
     ProductionHandlerProvider(
         util::Config const& config,
         std::shared_ptr<BackendInterface> const& backend,
-        std::shared_ptr<feed::SubscriptionManager> const& subscriptionManager,
+        std::shared_ptr<feed::SubscriptionManagerInterface> const& subscriptionManager,
         std::shared_ptr<etl::LoadBalancer> const& balancer,
         std::shared_ptr<etl::ETLService const> const& etl,
         std::shared_ptr<data::AmendmentCenterInterface const> const& amendmentCenter,

src/rpc/handlers/Unsubscribe.hpp

@@ -37,10 +37,6 @@
 #include <string>
 #include <vector>
 
-namespace feed {
-class SubscriptionManager;
-}  // namespace feed
-
 namespace rpc {
 
 /**