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 "rocksdb/persistent_cache.h"
  10
  11 #include <jni.h>
  12
  13 #include <string>
  14
  15 #include "include/org_rocksdb_PersistentCache.h"
  16 #include "loggerjnicallback.h"
  17 #include "portal.h"
  18 #include "rocksjni/cplusplus_to_java_convert.h"
  19
  20 /*
  21  * Class:     org_rocksdb_PersistentCache
  22  * Method:    newPersistentCache
  23  * Signature: (JLjava/lang/String;JJZ)J
  24  */
  25 jlong Java_org_rocksdb_PersistentCache_newPersistentCache(
  26     JNIEnv* env, jclass, jlong jenv_handle, jstring jpath, jlong jsz,
  27     jlong jlogger_handle, jboolean joptimized_for_nvm) {
  28   auto* rocks_env = reinterpret_cast<ROCKSDB_NAMESPACE::Env*>(jenv_handle);
  29   jboolean has_exception = JNI_FALSE;
  30   std::string path =
  31       ROCKSDB_NAMESPACE::JniUtil::copyStdString(env, jpath, &has_exception);
  32   if (has_exception == JNI_TRUE) {
  33     return 0;
  34   }
  35   auto* logger =
  36       reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::LoggerJniCallback>*>(
  37           jlogger_handle);
  38   auto* cache =
  39       new std::shared_ptr<ROCKSDB_NAMESPACE::PersistentCache>(nullptr);
  40   ROCKSDB_NAMESPACE::Status s = ROCKSDB_NAMESPACE::NewPersistentCache(
  41       rocks_env, path, static_cast<uint64_t>(jsz), *logger,
  42       static_cast<bool>(joptimized_for_nvm), cache);
  43   if (!s.ok()) {
  44     ROCKSDB_NAMESPACE::RocksDBExceptionJni::ThrowNew(env, s);
  45   }
  46   return GET_CPLUSPLUS_POINTER(cache);
  47 }
  48
  49 /*
  50  * Class:     org_rocksdb_PersistentCache
  51  * Method:    disposeInternal
  52  * Signature: (J)V
  53  */
  54 void Java_org_rocksdb_PersistentCache_disposeInternal(JNIEnv*, jobject,
  55                                                       jlong jhandle) {
  56   auto* cache =
  57       reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::PersistentCache>*>(
  58           jhandle);
  59   delete cache;  // delete std::shared_ptr
  60 }