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[Java] Add basic Java binding for rocksdb::Env.

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Summary: Add basic Java binding for rocksdb::Env.

Test Plan:
make rocksdbjava
make jtest
cd java
./jdb_bench.sh --max_background_compactions=1
./jdb_bench.sh --max_background_compactions=10

Reviewers: sdong, ankgup87, haobo

Reviewed By: haobo

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D18903
This commit is contained in:
Yueh-Hsuan Chiang
2014-06-05 17:09:25 -07:00
parent b92a19a431
commit e72b02e3c2
6 changed files with 187 additions and 5 deletions
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66
java/rocksjni/env.cc Normal file
View File

@@ -0,0 +1,66 @@
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
// This file implements the "bridge" between Java and C++ and enables
// calling c++ rocksdb::Env methods from Java side.
#include "include/org_rocksdb_RocksEnv.h"
#include "rocksdb/env.h"
/*
* Class: org_rocksdb_RocksEnv
* Method: getDefaultEnvInternal
* Signature: ()J
*/
jlong Java_org_rocksdb_RocksEnv_getDefaultEnvInternal(
JNIEnv* env, jclass jclass) {
return reinterpret_cast<jlong>(rocksdb::Env::Default());
}
/*
* Class: org_rocksdb_RocksEnv
* Method: setBackgroundThreads
* Signature: (JII)V
*/
void Java_org_rocksdb_RocksEnv_setBackgroundThreads(
JNIEnv* env, jobject jobj, jlong jhandle,
jint num, jint priority) {
auto* rocks_env = reinterpret_cast<rocksdb::Env*>(jhandle);
switch (priority) {
case org_rocksdb_RocksEnv_FLUSH_POOL:
rocks_env->SetBackgroundThreads(num, rocksdb::Env::Priority::LOW);
break;
case org_rocksdb_RocksEnv_COMPACTION_POOL:
rocks_env->SetBackgroundThreads(num, rocksdb::Env::Priority::HIGH);
break;
}
}
/*
* Class: org_rocksdb_RocksEnv
* Method: getThreadPoolQueueLen
* Signature: (JI)I
*/
jint Java_org_rocksdb_RocksEnv_getThreadPoolQueueLen(
JNIEnv* env, jobject jobj, jlong jhandle, jint pool_id) {
auto* rocks_env = reinterpret_cast<rocksdb::Env*>(jhandle);
switch (pool_id) {
case org_rocksdb_RocksEnv_FLUSH_POOL:
return rocks_env->GetThreadPoolQueueLen(rocksdb::Env::Priority::LOW);
case org_rocksdb_RocksEnv_COMPACTION_POOL:
return rocks_env->GetThreadPoolQueueLen(rocksdb::Env::Priority::HIGH);
}
return 0;
}
/*
* Class: org_rocksdb_RocksEnv
* Method: disposeInternal
* Signature: (J)V
*/
void Java_org_rocksdb_RocksEnv_disposeInternal(
JNIEnv* env, jobject jobj, jlong jhandle) {
delete reinterpret_cast<rocksdb::Env*>(jhandle);
}

4
java/rocksjni/rocksjni.cc
View File

@@ -29,10 +29,6 @@ void Java_org_rocksdb_RocksDB_open(
JNIEnv* env, jobject jdb, jlong jopt_handle,
jlong jcache_size, jstring jdb_path) {
auto opt = reinterpret_cast<rocksdb::Options*>(jopt_handle);
// TODO(yhchiang): should be removed once Java binding for Env is ready.
if (opt->max_background_compactions > 1) {
opt->env->SetBackgroundThreads(opt->max_background_compactions);
}
if (jcache_size > 0) {
opt->no_block_cache = false;
opt->block_cache = rocksdb::NewLRUCache(jcache_size);