Reintroduce ExtentManager::Factory to the MMAPV1Engine constructor

2 files changed, 10 insertions, 1 deletions

diff --git a/src/mongo/db/storage/mmap_v1/mmap_v1_engine.cpp b/src/mongo/db/storage/mmap_v1/mmap_v1_engine.cpp
index e4f4b0340de..e185afe03c7 100644
--- a/src/mongo/db/storage/mmap_v1/mmap_v1_engine.cpp
+++ b/src/mongo/db/storage/mmap_v1/mmap_v1_engine.cpp
@@ -227,8 +227,13 @@ void clearTmpFiles() {
 }  // namespace
 
 MMAPV1Engine::MMAPV1Engine(const StorageEngineLockFile* lockFile, ClockSource* cs)
+    : MMAPV1Engine(lockFile, cs, stdx::make_unique<MmapV1ExtentManager::Factory>()) {}
+
+MMAPV1Engine::MMAPV1Engine(const StorageEngineLockFile* lockFile,
+                           ClockSource* cs,
+                           std::unique_ptr<ExtentManager::Factory> extentManagerFactory)
     : _recordAccessTracker(cs),
-      _extentManagerFactory(stdx::make_unique<MmapV1ExtentManager::Factory>()),
+      _extentManagerFactory(std::move(extentManagerFactory)),
       _clock(cs),
       _startMs(_clock->now().toMillisSinceEpoch()) {
     // TODO check non-journal subdirs if using directory-per-db
diff --git a/src/mongo/db/storage/mmap_v1/mmap_v1_engine.h b/src/mongo/db/storage/mmap_v1/mmap_v1_engine.h
index 80a20ecbb0c..54e8594e053 100644
--- a/src/mongo/db/storage/mmap_v1/mmap_v1_engine.h
+++ b/src/mongo/db/storage/mmap_v1/mmap_v1_engine.h
@@ -46,6 +46,10 @@ class MMAPV1DatabaseCatalogEntry;
 class MMAPV1Engine : public StorageEngine {
 public:
     MMAPV1Engine(const StorageEngineLockFile* lockFile, ClockSource* cs);
+
+    MMAPV1Engine(const StorageEngineLockFile* lockFile,
+                 ClockSource* cs,
+                 std::unique_ptr<ExtentManager::Factory> extentManagerFactory);
     virtual ~MMAPV1Engine();
 
     void finishInit();