1 files changed, 49 insertions, 0 deletions
diff --git a/src/rocksdb/java/rocksjni/lru_cache.cc b/src/rocksdb/java/rocksjni/lru_cache.cc
new file mode 100644
index 000000000..56dffa2f0
--- /dev/null
+++ b/src/rocksdb/java/rocksjni/lru_cache.cc
@@ -0,0 +1,49 @@
+// Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
+//  This source code is licensed under both the GPLv2 (found in the
+//  COPYING file in the root directory) and Apache 2.0 License
+//  (found in the LICENSE.Apache file in the root directory).
+//
+// This file implements the "bridge" between Java and C++ for
+// ROCKSDB_NAMESPACE::LRUCache.
+
+#include "cache/lru_cache.h"
+
+#include <jni.h>
+
+#include "include/org_rocksdb_LRUCache.h"
+#include "rocksjni/cplusplus_to_java_convert.h"
+
+/*
+ * Class:     org_rocksdb_LRUCache
+ * Method:    newLRUCache
+ * Signature: (JIZD)J
+ */
+jlong Java_org_rocksdb_LRUCache_newLRUCache(JNIEnv* /*env*/, jclass /*jcls*/,
+                                            jlong jcapacity,
+                                            jint jnum_shard_bits,
+                                            jboolean jstrict_capacity_limit,
+                                            jdouble jhigh_pri_pool_ratio,
+                                            jdouble jlow_pri_pool_ratio) {
+  auto* sptr_lru_cache = new std::shared_ptr<ROCKSDB_NAMESPACE::Cache>(
+      ROCKSDB_NAMESPACE::NewLRUCache(
+          static_cast<size_t>(jcapacity), static_cast<int>(jnum_shard_bits),
+          static_cast<bool>(jstrict_capacity_limit),
+          static_cast<double>(jhigh_pri_pool_ratio),
+          nullptr /* memory_allocator */, rocksdb::kDefaultToAdaptiveMutex,
+          rocksdb::kDefaultCacheMetadataChargePolicy,
+          static_cast<double>(jlow_pri_pool_ratio)));
+  return GET_CPLUSPLUS_POINTER(sptr_lru_cache);
+}
+
+/*
+ * Class:     org_rocksdb_LRUCache
+ * Method:    disposeInternal
+ * Signature: (J)V
+ */
+void Java_org_rocksdb_LRUCache_disposeInternal(JNIEnv* /*env*/,
+                                               jobject /*jobj*/,
+                                               jlong jhandle) {
+  auto* sptr_lru_cache =
+      reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::Cache>*>(jhandle);
+  delete sptr_lru_cache;  // delete std::shared_ptr
+}