Add JNI bindings

Author: mike-evolved

java/rocksjni/secondary_cache.cc

@@ -0,0 +1,71 @@
+// 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 JNI bindings for SecondaryCache
+
+#include <jni.h>
+
+#include "include/org_rocksdb_SecondaryCache.h"
+#include "rocksdb/cache.h"
+#include "rocksjni/cplusplus_to_java_convert.h"
+#include "rocksjni/portal.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Class:     org_rocksdb_SecondaryCache_CompressedSecondaryCache
+ * Method:    newCompressedSecondaryCacheInstance
+ * Signature: (J)J
+ */
+JNIEXPORT jlong JNICALL Java_org_rocksdb_SecondaryCache_00024CompressedSecondaryCache_newCompressedSecondaryCacheInstance__J(
+    JNIEnv* /*env*/, jclass /*jcls*/, jlong jcapacity) {
+  auto opts = ROCKSDB_NAMESPACE::CompressedSecondaryCacheOptions();
+  opts.capacity = static_cast<size_t>(jcapacity);
+  auto cache = opts.MakeSharedSecondaryCache();
+  auto* cache_ptr =
+      new std::shared_ptr<ROCKSDB_NAMESPACE::SecondaryCache>(cache);
+  return GET_CPLUSPLUS_POINTER(cache_ptr);
+}
+
+/*
+ * Class:     org_rocksdb_SecondaryCache_CompressedSecondaryCache
+ * Method:    newCompressedSecondaryCacheInstance
+ * Signature: (JIZD)J
+ */
+JNIEXPORT jlong JNICALL Java_org_rocksdb_SecondaryCache_00024CompressedSecondaryCache_newCompressedSecondaryCacheInstance__JIZD(
+    JNIEnv* /*env*/, jclass /*jcls*/, jlong jcapacity, jint jnum_shard_bits,
+    jboolean jstrict_capacity_limit, jdouble jhigh_pri_pool_ratio) {
+  auto opts = ROCKSDB_NAMESPACE::CompressedSecondaryCacheOptions();
+  opts.capacity = static_cast<size_t>(jcapacity);
+  opts.num_shard_bits = static_cast<int>(jnum_shard_bits);
+  opts.strict_capacity_limit = static_cast<bool>(jstrict_capacity_limit);
+  opts.high_pri_pool_ratio = static_cast<double>(jhigh_pri_pool_ratio);
+  
+  auto cache = opts.MakeSharedSecondaryCache();
+  auto* cache_ptr =
+      new std::shared_ptr<ROCKSDB_NAMESPACE::SecondaryCache>(cache);
+  return GET_CPLUSPLUS_POINTER(cache_ptr);
+}
+
+/*
+ * Class:     org_rocksdb_SecondaryCache
+ * Method:    disposeInternalJni
+ * Signature: (J)V
+ */
+JNIEXPORT void JNICALL Java_org_rocksdb_SecondaryCache_disposeInternalJni(JNIEnv* /*env*/,
+                                                         jobject /*jobj*/,
+                                                         jlong jhandle) {
+  auto* cache =
+      reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::SecondaryCache>*>(
+          jhandle);
+  assert(cache != nullptr);
+  delete cache;
+}
+
+#ifdef __cplusplus
+}
+#endif