database: Remove compaction_manager.hh inclusion into database.hh

The only reason why it's there (right next to compaction_fwd.hh) is
because the database::table_truncate_state subclass needs the definition
of compaction_manager::compaction_reenabler subclass.

However, the former sub is not used outside of database.cc and can be
defined in .cc. Keeping it outside of the header allows dropping the
compaction_manager.hh from database.hh thus greatly reducing its fanout
over the code (from ~180 indirect inclusions down to ~20).

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>

Closes #13622

api/column_family.cc

@@ -17,6 +17,7 @@
 #include "db/system_keyspace.hh"
 #include "db/data_listeners.hh"
 #include "storage_service.hh"
+#include "compaction/compaction_manager.hh"
 #include "unimplemented.hh"
 
 extern logging::logger apilog;

compaction/task_manager_module.cc

@@ -7,6 +7,7 @@
  */
 
 #include "compaction/task_manager_module.hh"
+#include "compaction/compaction_manager.hh"
 #include "replica/database.hh"
 
 namespace compaction {

db/view/view.cc

@@ -48,6 +48,7 @@
 #include "mutation/mutation_partition.hh"
 #include "service/migration_manager.hh"
 #include "service/storage_proxy.hh"
+#include "compaction/compaction_manager.hh"
 #include "utils/small_vector.hh"
 #include "view_info.hh"
 #include "view_update_checks.hh"

repair/row_level.cc

@@ -55,6 +55,7 @@
 #include "repair/decorated_key_with_hash.hh"
 #include "repair/row.hh"
 #include "repair/writer.hh"
+#include "compaction/compaction_manager.hh"
 #include "utils/xx_hasher.hh"
 
 extern logging::logger rlogger;

replica/database.cc

@@ -2330,6 +2330,14 @@ future<> database::truncate_table_on_all_shards(sharded<database>& sharded_db, s
     co_return co_await truncate_table_on_all_shards(sharded_db, table_shards, truncated_at_opt, with_snapshot, std::move(snapshot_name_opt));
 }
 
+struct database::table_truncate_state {
+    gate::holder holder;
+    db_clock::time_point low_mark_at;
+    db::replay_position low_mark;
+    std::vector<compaction_manager::compaction_reenabler> cres;
+    bool did_flush;
+};
+
 future<> database::truncate_table_on_all_shards(sharded<database>& sharded_db, const std::vector<foreign_ptr<lw_shared_ptr<table>>>& table_shards, std::optional<db_clock::time_point> truncated_at_opt, bool with_snapshot, std::optional<sstring> snapshot_name_opt) {
     auto& cf = *table_shards[this_shard_id()];
     auto s = cf.schema();

replica/database.hh

@@ -64,7 +64,6 @@
 #include "db/operation_type.hh"
 #include "utils/serialized_action.hh"
 #include "compaction/compaction_fwd.hh"
-#include "compaction/compaction_manager.hh"
 #include "utils/disk-error-handler.hh"
 #include "rust/wasmtime_bindings.hh"
 
@@ -1672,13 +1671,7 @@ private:
 
     static future<std::vector<foreign_ptr<lw_shared_ptr<table>>>> get_table_on_all_shards(sharded<database>& db, table_id uuid);
 
-    struct table_truncate_state {
+    struct table_truncate_state;
-        gate::holder holder;
-        db_clock::time_point low_mark_at;
-        db::replay_position low_mark;
-        std::vector<compaction_manager::compaction_reenabler> cres;
-        bool did_flush;
-    };
 
     static future<> truncate_table_on_all_shards(sharded<database>& db, const std::vector<foreign_ptr<lw_shared_ptr<table>>>&, std::optional<db_clock::time_point> truncated_at_opt, bool with_snapshot, std::optional<sstring> snapshot_name_opt);
     future<> truncate(column_family& cf, const table_truncate_state&, db_clock::time_point truncated_at);

replica/dirty_memory_manager.cc

@@ -6,6 +6,7 @@
 #include "database.hh" // for memtable_list
 #include <seastar/core/metrics_api.hh>
 #include <seastar/util/later.hh>
+#include <seastar/core/sleep.hh>
 #include <seastar/core/with_scheduling_group.hh>
 #include <seastar/coroutine/maybe_yield.hh>
 #include "seastarx.hh"

test/boost/database_test.cc

@@ -37,6 +37,7 @@
 #include "db/data_listeners.hh"
 #include "multishard_mutation_query.hh"
 #include "transport/messages/result_message.hh"
+#include "compaction/compaction_manager.hh"
 #include "db/snapshot-ctl.hh"
 
 using namespace std::chrono_literals;

tombstone_gc.cc

@@ -17,6 +17,7 @@
 #include "exceptions/exceptions.hh"
 #include "locator/abstract_replication_strategy.hh"
 #include "replica/database.hh"
+#include "compaction/compaction_manager.hh"
 #include "data_dictionary/data_dictionary.hh"
 #include "gms/feature_service.hh"