From 47407693b5ee2bdcf2ba93fb7384799a21b31b42 Mon Sep 17 00:00:00 2001
From: Geir Storli <geirst@yahooinc.com>
Date: Thu, 13 Oct 2022 12:44:49 +0000
Subject: Use the generic CompactionContext in ArrayStore.

---
 .../datastore/array_store/array_store_test.cpp     |  2 +-
 .../src/vespa/vespalib/datastore/array_store.h     |  6 ++-
 .../src/vespa/vespalib/datastore/array_store.hpp   | 43 ++++------------------
 3 files changed, 13 insertions(+), 38 deletions(-)

diff --git a/vespalib/src/tests/datastore/array_store/array_store_test.cpp b/vespalib/src/tests/datastore/array_store/array_store_test.cpp
index afef530b33e..3179b60a4a1 100644
--- a/vespalib/src/tests/datastore/array_store/array_store_test.cpp
+++ b/vespalib/src/tests/datastore/array_store/array_store_test.cpp
@@ -208,7 +208,7 @@ TEST_P(NumberStoreTest, control_static_sizes) {
     EXPECT_EQ(464u, sizeof(store));
     EXPECT_EQ(304u, sizeof(NumberStoreTest::ArrayStoreType::DataStoreType));
 #else
-    EXPECT_EQ(496u, sizeof(store));
+    EXPECT_EQ(504u, sizeof(store));
     EXPECT_EQ(336u, sizeof(NumberStoreTest::ArrayStoreType::DataStoreType));
 #endif
     EXPECT_EQ(112u, sizeof(NumberStoreTest::ArrayStoreType::SmallBufferType));
diff --git a/vespalib/src/vespa/vespalib/datastore/array_store.h b/vespalib/src/vespa/vespalib/datastore/array_store.h
index e7662b9eb73..95d632d9603 100644
--- a/vespalib/src/vespa/vespalib/datastore/array_store.h
+++ b/vespalib/src/vespa/vespalib/datastore/array_store.h
@@ -10,6 +10,7 @@
 #include "entryref.h"
 #include "atomic_entry_ref.h"
 #include "i_compaction_context.h"
+#include "i_compactable.h"
 #include "large_array_buffer_type.h"
 #include "small_array_buffer_type.h"
 #include <vespa/vespalib/util/array.h>
@@ -28,7 +29,7 @@ namespace vespalib::datastore {
  * The max value of maxSmallArrayTypeId is (2^bufferBits - 1).
  */
 template <typename EntryT, typename RefT = EntryRefT<19>, typename TypeMapperT = ArrayStoreTypeMapper<EntryT> >
-class ArrayStore
+class ArrayStore : public ICompactable
 {
 public:
     using AllocSpec = ArrayStoreConfig::AllocSpec;
@@ -66,7 +67,7 @@ private:
 public:
     ArrayStore(const ArrayStoreConfig &cfg, std::shared_ptr<alloc::MemoryAllocator> memory_allocator);
     ArrayStore(const ArrayStoreConfig &cfg, std::shared_ptr<alloc::MemoryAllocator> memory_allocator, TypeMapper&& mapper);
-    ~ArrayStore();
+    ~ArrayStore() override;
     EntryRef add(const ConstArrayRef &array);
     ConstArrayRef get(EntryRef ref) const {
         if (!ref.valid()) {
@@ -104,6 +105,7 @@ public:
     }
 
     void remove(EntryRef ref);
+    EntryRef move_on_compact(EntryRef ref) override;
     ICompactionContext::UP compactWorst(CompactionSpec compaction_spec, const CompactionStrategy& compaction_strategy);
     vespalib::MemoryUsage getMemoryUsage() const { return _store.getMemoryUsage(); }
 
diff --git a/vespalib/src/vespa/vespalib/datastore/array_store.hpp b/vespalib/src/vespa/vespalib/datastore/array_store.hpp
index b31d47fe4fe..95f4a3c4155 100644
--- a/vespalib/src/vespa/vespalib/datastore/array_store.hpp
+++ b/vespalib/src/vespa/vespalib/datastore/array_store.hpp
@@ -4,13 +4,14 @@
 
 #include "array_store.h"
 #include "compacting_buffers.h"
+#include "compaction_context.h"
 #include "compaction_spec.h"
-#include "entry_ref_filter.h"
 #include "datastore.hpp"
+#include "entry_ref_filter.h"
 #include "large_array_buffer_type.hpp"
 #include "small_array_buffer_type.hpp"
-#include <atomic>
 #include <algorithm>
+#include <atomic>
 
 namespace vespalib::datastore {
 
@@ -145,38 +146,11 @@ ArrayStore<EntryT, RefT, TypeMapperT>::remove(EntryRef ref)
     }
 }
 
-namespace arraystore {
-
 template <typename EntryT, typename RefT, typename TypeMapperT>
-class CompactionContext : public ICompactionContext {
-private:
-    using ArrayStoreType = ArrayStore<EntryT, RefT, TypeMapperT>;
-    ArrayStoreType &_store;
-    std::unique_ptr<vespalib::datastore::CompactingBuffers> _compacting_buffers;
-    EntryRefFilter _filter;
-
-public:
-    CompactionContext(ArrayStoreType &store,
-                      std::unique_ptr<vespalib::datastore::CompactingBuffers> compacting_buffers)
-        : _store(store),
-          _compacting_buffers(std::move(compacting_buffers)),
-          _filter(_compacting_buffers->make_entry_ref_filter())
-    {
-    }
-    ~CompactionContext() override {
-        _compacting_buffers->finish();
-    }
-    void compact(vespalib::ArrayRef<AtomicEntryRef> refs) override {
-        for (auto &atomic_entry_ref : refs) {
-            auto ref = atomic_entry_ref.load_relaxed();
-            if (ref.valid() && _filter.has(ref)) {
-                EntryRef newRef = _store.add(_store.get(ref));
-                atomic_entry_ref.store_release(newRef);
-            }
-        }
-    }
-};
-
+EntryRef
+ArrayStore<EntryT, RefT, TypeMapperT>::move_on_compact(EntryRef ref)
+{
+    return add(get(ref));
 }
 
 template <typename EntryT, typename RefT, typename TypeMapperT>
@@ -184,8 +158,7 @@ ICompactionContext::UP
 ArrayStore<EntryT, RefT, TypeMapperT>::compactWorst(CompactionSpec compaction_spec, const CompactionStrategy &compaction_strategy)
 {
     auto compacting_buffers = _store.start_compact_worst_buffers(compaction_spec, compaction_strategy);
-    return std::make_unique<arraystore::CompactionContext<EntryT, RefT, TypeMapperT>>
-        (*this, std::move(compacting_buffers));
+    return std::make_unique<CompactionContext>(*this, std::move(compacting_buffers));
 }
 
 template <typename EntryT, typename RefT, typename TypeMapperT>
-- 
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