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// 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 "bridge" between Java and C++ and enables
// calling c++ ROCKSDB_NAMESPACE::TtlDB methods.
// from Java side.
#include <jni.h>
#include <stdio.h>
#include <stdlib.h>
#include <memory>
#include <string>
#include <vector>
#include "include/org_rocksdb_TtlDB.h"
#include "rocksdb/utilities/db_ttl.h"
#include "rocksjni/cplusplus_to_java_convert.h"
#include "rocksjni/portal.h"
/*
* Class: org_rocksdb_TtlDB
* Method: open
* Signature: (JLjava/lang/String;IZ)J
*/
jlong Java_org_rocksdb_TtlDB_open(JNIEnv* env, jclass, jlong joptions_handle,
jstring jdb_path, jint jttl,
jboolean jread_only) {
const char* db_path = env->GetStringUTFChars(jdb_path, nullptr);
if (db_path == nullptr) {
// exception thrown: OutOfMemoryError
return 0;
}
auto* opt = reinterpret_cast<ROCKSDB_NAMESPACE::Options*>(joptions_handle);
ROCKSDB_NAMESPACE::DBWithTTL* db = nullptr;
ROCKSDB_NAMESPACE::Status s =
ROCKSDB_NAMESPACE::DBWithTTL::Open(*opt, db_path, &db, jttl, jread_only);
env->ReleaseStringUTFChars(jdb_path, db_path);
// as TTLDB extends RocksDB on the java side, we can reuse
// the RocksDB portal here.
if (s.ok()) {
return GET_CPLUSPLUS_POINTER(db);
} else {
ROCKSDB_NAMESPACE::RocksDBExceptionJni::ThrowNew(env, s);
return 0;
}
}
/*
* Class: org_rocksdb_TtlDB
* Method: openCF
* Signature: (JLjava/lang/String;[[B[J[IZ)[J
*/
jlongArray Java_org_rocksdb_TtlDB_openCF(JNIEnv* env, jclass, jlong jopt_handle,
jstring jdb_path,
jobjectArray jcolumn_names,
jlongArray jcolumn_options,
jintArray jttls, jboolean jread_only) {
const char* db_path = env->GetStringUTFChars(jdb_path, nullptr);
if (db_path == nullptr) {
// exception thrown: OutOfMemoryError
return 0;
}
const jsize len_cols = env->GetArrayLength(jcolumn_names);
jlong* jco = env->GetLongArrayElements(jcolumn_options, nullptr);
if (jco == nullptr) {
// exception thrown: OutOfMemoryError
env->ReleaseStringUTFChars(jdb_path, db_path);
return nullptr;
}
std::vector<ROCKSDB_NAMESPACE::ColumnFamilyDescriptor> column_families;
jboolean has_exception = JNI_FALSE;
ROCKSDB_NAMESPACE::JniUtil::byteStrings<std::string>(
env, jcolumn_names,
[](const char* str_data, const size_t str_len) {
return std::string(str_data, str_len);
},
[&jco, &column_families](size_t idx, std::string cf_name) {
ROCKSDB_NAMESPACE::ColumnFamilyOptions* cf_options =
reinterpret_cast<ROCKSDB_NAMESPACE::ColumnFamilyOptions*>(jco[idx]);
column_families.push_back(
ROCKSDB_NAMESPACE::ColumnFamilyDescriptor(cf_name, *cf_options));
},
&has_exception);
env->ReleaseLongArrayElements(jcolumn_options, jco, JNI_ABORT);
if (has_exception == JNI_TRUE) {
// exception occurred
env->ReleaseStringUTFChars(jdb_path, db_path);
return nullptr;
}
std::vector<int32_t> ttl_values;
jint* jttlv = env->GetIntArrayElements(jttls, nullptr);
if (jttlv == nullptr) {
// exception thrown: OutOfMemoryError
env->ReleaseStringUTFChars(jdb_path, db_path);
return nullptr;
}
const jsize len_ttls = env->GetArrayLength(jttls);
for (jsize i = 0; i < len_ttls; i++) {
ttl_values.push_back(jttlv[i]);
}
env->ReleaseIntArrayElements(jttls, jttlv, JNI_ABORT);
auto* opt = reinterpret_cast<ROCKSDB_NAMESPACE::DBOptions*>(jopt_handle);
std::vector<ROCKSDB_NAMESPACE::ColumnFamilyHandle*> handles;
ROCKSDB_NAMESPACE::DBWithTTL* db = nullptr;
ROCKSDB_NAMESPACE::Status s = ROCKSDB_NAMESPACE::DBWithTTL::Open(
*opt, db_path, column_families, &handles, &db, ttl_values, jread_only);
// we have now finished with db_path
env->ReleaseStringUTFChars(jdb_path, db_path);
// check if open operation was successful
if (s.ok()) {
const jsize resultsLen = 1 + len_cols; // db handle + column family handles
std::unique_ptr<jlong[]> results =
std::unique_ptr<jlong[]>(new jlong[resultsLen]);
results[0] = GET_CPLUSPLUS_POINTER(db);
for (int i = 1; i <= len_cols; i++) {
results[i] = GET_CPLUSPLUS_POINTER(handles[i - 1]);
}
jlongArray jresults = env->NewLongArray(resultsLen);
if (jresults == nullptr) {
// exception thrown: OutOfMemoryError
return nullptr;
}
env->SetLongArrayRegion(jresults, 0, resultsLen, results.get());
if (env->ExceptionCheck()) {
// exception thrown: ArrayIndexOutOfBoundsException
env->DeleteLocalRef(jresults);
return nullptr;
}
return jresults;
} else {
ROCKSDB_NAMESPACE::RocksDBExceptionJni::ThrowNew(env, s);
return NULL;
}
}
/*
* Class: org_rocksdb_TtlDB
* Method: disposeInternal
* Signature: (J)V
*/
void Java_org_rocksdb_TtlDB_disposeInternal(JNIEnv*, jobject, jlong jhandle) {
auto* ttl_db = reinterpret_cast<ROCKSDB_NAMESPACE::DBWithTTL*>(jhandle);
assert(ttl_db != nullptr);
delete ttl_db;
}
/*
* Class: org_rocksdb_TtlDB
* Method: closeDatabase
* Signature: (J)V
*/
void Java_org_rocksdb_TtlDB_closeDatabase(JNIEnv* /* env */, jclass,
jlong /* jhandle */) {
// auto* ttl_db = reinterpret_cast<ROCKSDB_NAMESPACE::DBWithTTL*>(jhandle);
// assert(ttl_db != nullptr);
// ROCKSDB_NAMESPACE::Status s = ttl_db->Close();
// ROCKSDB_NAMESPACE::RocksDBExceptionJni::ThrowNew(env, s);
// TODO(AR) this is disabled until
// https://github.com/facebook/rocksdb/issues/4818 is resolved!
}
/*
* Class: org_rocksdb_TtlDB
* Method: createColumnFamilyWithTtl
* Signature: (JLorg/rocksdb/ColumnFamilyDescriptor;[BJI)J;
*/
jlong Java_org_rocksdb_TtlDB_createColumnFamilyWithTtl(JNIEnv* env, jobject,
jlong jdb_handle,
jbyteArray jcolumn_name,
jlong jcolumn_options,
jint jttl) {
jbyte* cfname = env->GetByteArrayElements(jcolumn_name, nullptr);
if (cfname == nullptr) {
// exception thrown: OutOfMemoryError
return 0;
}
const jsize len = env->GetArrayLength(jcolumn_name);
auto* cfOptions = reinterpret_cast<ROCKSDB_NAMESPACE::ColumnFamilyOptions*>(
jcolumn_options);
auto* db_handle = reinterpret_cast<ROCKSDB_NAMESPACE::DBWithTTL*>(jdb_handle);
ROCKSDB_NAMESPACE::ColumnFamilyHandle* handle;
ROCKSDB_NAMESPACE::Status s = db_handle->CreateColumnFamilyWithTtl(
*cfOptions, std::string(reinterpret_cast<char*>(cfname), len), &handle,
jttl);
env->ReleaseByteArrayElements(jcolumn_name, cfname, JNI_ABORT);
if (s.ok()) {
return GET_CPLUSPLUS_POINTER(handle);
}
ROCKSDB_NAMESPACE::RocksDBExceptionJni::ThrowNew(env, s);
return 0;
}
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