ceph/src/rocksdb/java/rocksjni/persistent_cache.cc

   1 // Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
   2 //  This source code is licensed under both the GPLv2 (found in the
   3 //  COPYING file in the root directory) and Apache 2.0 License
   4 //  (found in the LICENSE.Apache file in the root directory).
   5 //
   6 // This file implements the "bridge" between Java and C++ for
   7 // ROCKSDB_NAMESPACE::PersistentCache.
   8
   9 #include <jni.h>
  10 #include <string>
  11
  12 #include "include/org_rocksdb_PersistentCache.h"
  13 #include "rocksdb/persistent_cache.h"
  14 #include "loggerjnicallback.h"
  15 #include "portal.h"
  16
  17 /*
  18  * Class:     org_rocksdb_PersistentCache
  19  * Method:    newPersistentCache
  20  * Signature: (JLjava/lang/String;JJZ)J
  21  */
  22 jlong Java_org_rocksdb_PersistentCache_newPersistentCache(
  23     JNIEnv* env, jclass, jlong jenv_handle, jstring jpath,
  24     jlong jsz, jlong jlogger_handle, jboolean joptimized_for_nvm) {
  25   auto* rocks_env = reinterpret_cast<ROCKSDB_NAMESPACE::Env*>(jenv_handle);
  26   jboolean has_exception = JNI_FALSE;
  27   std::string path =
  28       ROCKSDB_NAMESPACE::JniUtil::copyStdString(env, jpath, &has_exception);
  29   if (has_exception == JNI_TRUE) {
  30     return 0;
  31   }
  32   auto* logger =
  33       reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::LoggerJniCallback>*>(
  34           jlogger_handle);
  35   auto* cache =
  36       new std::shared_ptr<ROCKSDB_NAMESPACE::PersistentCache>(nullptr);
  37   ROCKSDB_NAMESPACE::Status s = ROCKSDB_NAMESPACE::NewPersistentCache(
  38       rocks_env, path, static_cast<uint64_t>(jsz), *logger,
  39       static_cast<bool>(joptimized_for_nvm), cache);
  40   if (!s.ok()) {
  41     ROCKSDB_NAMESPACE::RocksDBExceptionJni::ThrowNew(env, s);
  42   }
  43   return reinterpret_cast<jlong>(cache);
  44 }
  45
  46 /*
  47  * Class:     org_rocksdb_PersistentCache
  48  * Method:    disposeInternal
  49  * Signature: (J)V
  50  */
  51 void Java_org_rocksdb_PersistentCache_disposeInternal(
  52     JNIEnv*, jobject, jlong jhandle) {
  53   auto* cache =
  54       reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::PersistentCache>*>(
  55           jhandle);
  56   delete cache;  // delete std::shared_ptr
  57 }