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::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::Env*>(jenv_handle);
  26   jboolean has_exception = JNI_FALSE;
  27   std::string path = rocksdb::JniUtil::copyStdString(env, jpath, &has_exception);
  28   if (has_exception == JNI_TRUE) {
  29     return 0;
  30   }
  31   auto* logger =
  32       reinterpret_cast<std::shared_ptr<rocksdb::LoggerJniCallback>*>(jlogger_handle);
  33   auto* cache = new std::shared_ptr<rocksdb::PersistentCache>(nullptr);
  34   rocksdb::Status s = rocksdb::NewPersistentCache(
  35       rocks_env, path, static_cast<uint64_t>(jsz), *logger,
  36       static_cast<bool>(joptimized_for_nvm), cache);
  37   if (!s.ok()) {
  38     rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
  39   }
  40   return reinterpret_cast<jlong>(cache);
  41 }
  42
  43 /*
  44  * Class:     org_rocksdb_PersistentCache
  45  * Method:    disposeInternal
  46  * Signature: (J)V
  47  */
  48 void Java_org_rocksdb_PersistentCache_disposeInternal(
  49     JNIEnv*, jobject, jlong jhandle) {
  50   auto* cache =
  51       reinterpret_cast<std::shared_ptr<rocksdb::PersistentCache>*>(jhandle);
  52   delete cache;  // delete std::shared_ptr
  53 }