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rocksdb/java/rocksjni/rocksjni.cc

1167 lines
40 KiB

// 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::DB methods from Java side.
#include <stdio.h>
#include <stdlib.h>
#include <jni.h>
#include <string>
#include <vector>
#include "include/org_rocksdb_RocksDB.h"
#include "rocksjni/portal.h"
#include "rocksdb/db.h"
#include "rocksdb/cache.h"
//////////////////////////////////////////////////////////////////////////////
// rocksdb::DB::Open
/*
* Class: org_rocksdb_RocksDB
* Method: open
* Signature: (JLjava/lang/String;)V
*/
void Java_org_rocksdb_RocksDB_open__JLjava_lang_String_2(
JNIEnv* env, jobject jdb, jlong jopt_handle, jstring jdb_path) {
auto opt = reinterpret_cast<rocksdb::Options*>(jopt_handle);
rocksdb::DB* db = nullptr;
const char* db_path = env->GetStringUTFChars(jdb_path, 0);
rocksdb::Status s = rocksdb::DB::Open(*opt, db_path, &db);
env->ReleaseStringUTFChars(jdb_path, db_path);
if (s.ok()) {
rocksdb::RocksDBJni::setHandle(env, jdb, db);
return;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
}
/*
* Class: org_rocksdb_RocksDB
* Method: openROnly
* Signature: (JLjava/lang/String;)V
*/
void Java_org_rocksdb_RocksDB_openROnly__JLjava_lang_String_2(
JNIEnv* env, jobject jdb, jlong jopt_handle, jstring jdb_path) {
auto opt = reinterpret_cast<rocksdb::Options*>(jopt_handle);
rocksdb::DB* db = nullptr;
const char* db_path = env->GetStringUTFChars(jdb_path, 0);
rocksdb::Status s = rocksdb::DB::OpenForReadOnly(*opt,
db_path, &db);
env->ReleaseStringUTFChars(jdb_path, db_path);
if (s.ok()) {
rocksdb::RocksDBJni::setHandle(env, jdb, db);
return;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
}
/*
* Class: org_rocksdb_RocksDB
* Method: openROnly
* Signature: (JLjava/lang/String;Ljava/util/List;I)Ljava/util/List;
*/
jobject
Java_org_rocksdb_RocksDB_openROnly__JLjava_lang_String_2Ljava_util_List_2I(
JNIEnv* env, jobject jdb, jlong jopt_handle, jstring jdb_path,
jobject jcfname_list, jint jcfname_count) {
auto opt = reinterpret_cast<rocksdb::Options*>(jopt_handle);
rocksdb::DB* db = nullptr;
const char* db_path = env->GetStringUTFChars(jdb_path, 0);
std::vector<const char*> cfnames_to_free;
std::vector<jstring> jcfnames_for_free;
std::vector<rocksdb::ColumnFamilyDescriptor> column_families;
std::vector<rocksdb::ColumnFamilyHandle* > handles;
// get iterator for cfnames
jobject iteratorObj = env->CallObjectMethod(
jcfname_list, rocksdb::ListJni::getIteratorMethod(env));
// iterate over cfnames and convert cfnames to
// ColumnFamilyDescriptor instances
while (env->CallBooleanMethod(
iteratorObj, rocksdb::ListJni::getHasNextMethod(env)) == JNI_TRUE) {
jstring jstr = (jstring) env->CallObjectMethod(iteratorObj,
rocksdb::ListJni::getNextMethod(env));
const char* cfname = env->GetStringUTFChars(jstr, 0);
// free allocated cfnames after call to open
cfnames_to_free.push_back(cfname);
jcfnames_for_free.push_back(jstr);
column_families.push_back(rocksdb::ColumnFamilyDescriptor(cfname,
rocksdb::ColumnFamilyOptions()));
}
rocksdb::Status s = rocksdb::DB::OpenForReadOnly(*opt,
db_path, column_families, &handles, &db);
env->ReleaseStringUTFChars(jdb_path, db_path);
// free jbyte allocations
for (std::vector<jbyte*>::size_type i = 0;
i != cfnames_to_free.size(); i++) {
// free cfnames
env->ReleaseStringUTFChars(jcfnames_for_free[i], cfnames_to_free[i]);
}
jobject jcfhandle_list = nullptr;
// check if open operation was successful
if (s.ok()) {
rocksdb::RocksDBJni::setHandle(env, jdb, db);
jclass jclazz = env->FindClass("java/util/ArrayList");
jmethodID mid = rocksdb::ListJni::getArrayListConstructorMethodId(
env, jclazz);
jobject jcfhandle_list = env->NewObject(jclazz, mid, handles.size());
// insert in java list
for (std::vector<rocksdb::ColumnFamilyHandle*>::size_type i = 0;
i != handles.size(); i++) {
// jlong must be converted to Long due to collections restrictions
jclass jclazz = env->FindClass("java/lang/Long");
jmethodID mid = env->GetMethodID(jclazz, "<init>", "(J)V");
jobject obj = env->NewObject(jclazz, mid,
reinterpret_cast<jlong>(handles[i]));
env->CallBooleanMethod(jcfhandle_list,
rocksdb::ListJni::getListAddMethodId(env), obj);
}
return jcfhandle_list;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
return jcfhandle_list;
}
/*
* Class: org_rocksdb_RocksDB
* Method: open
* Signature: (JLjava/lang/String;Ljava/util/List;I)Ljava/util/List;
*/
jobject Java_org_rocksdb_RocksDB_open__JLjava_lang_String_2Ljava_util_List_2I(
JNIEnv* env, jobject jdb, jlong jopt_handle, jstring jdb_path,
jobject jcfname_list, jint jcfname_count) {
auto opt = reinterpret_cast<rocksdb::Options*>(jopt_handle);
rocksdb::DB* db = nullptr;
const char* db_path = env->GetStringUTFChars(jdb_path, 0);
std::vector<const char*> cfnames_to_free;
std::vector<jstring> jcfnames_for_free;
std::vector<rocksdb::ColumnFamilyDescriptor> column_families;
std::vector<rocksdb::ColumnFamilyHandle* > handles;
// get iterator for cfnames
jobject iteratorObj = env->CallObjectMethod(
jcfname_list, rocksdb::ListJni::getIteratorMethod(env));
// iterate over cfnames and convert cfnames to
// ColumnFamilyDescriptor instances
while (env->CallBooleanMethod(
iteratorObj, rocksdb::ListJni::getHasNextMethod(env)) == JNI_TRUE) {
jstring jstr = (jstring) env->CallObjectMethod(iteratorObj,
rocksdb::ListJni::getNextMethod(env));
const char* cfname = env->GetStringUTFChars(jstr, 0);
// free allocated cfnames after call to open
cfnames_to_free.push_back(cfname);
jcfnames_for_free.push_back(jstr);
column_families.push_back(rocksdb::ColumnFamilyDescriptor(cfname,
rocksdb::ColumnFamilyOptions()));
}
rocksdb::Status s = rocksdb::DB::Open(*opt, db_path, column_families,
&handles, &db);
env->ReleaseStringUTFChars(jdb_path, db_path);
// free jbyte allocations
for (std::vector<jbyte*>::size_type i = 0;
i != cfnames_to_free.size(); i++) {
// free cfnames
env->ReleaseStringUTFChars(jcfnames_for_free[i], cfnames_to_free[i]);
}
jobject jcfhandle_list = nullptr;
// check if open operation was successful
if (s.ok()) {
rocksdb::RocksDBJni::setHandle(env, jdb, db);
jclass jclazz = env->FindClass("java/util/ArrayList");
jmethodID mid = rocksdb::ListJni::getArrayListConstructorMethodId(
env, jclazz);
jobject jcfhandle_list = env->NewObject(jclazz, mid, handles.size());
// insert in java list
for (std::vector<rocksdb::ColumnFamilyHandle*>::size_type i = 0;
i != handles.size(); i++) {
// jlong must be converted to Long due to collections restrictions
jclass jclazz = env->FindClass("java/lang/Long");
jmethodID mid = env->GetMethodID(jclazz, "<init>", "(J)V");
jobject obj = env->NewObject(jclazz, mid,
reinterpret_cast<jlong>(handles[i]));
env->CallBooleanMethod(jcfhandle_list,
rocksdb::ListJni::getListAddMethodId(env), obj);
}
return jcfhandle_list;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
return jcfhandle_list;
}
//////////////////////////////////////////////////////////////////////////////
// rocksdb::DB::ListColumnFamilies
/*
* Class: org_rocksdb_RocksDB
* Method: listColumnFamilies
* Signature: (JLjava/lang/String;)Ljava/util/List;
*/
jobject Java_org_rocksdb_RocksDB_listColumnFamilies(
JNIEnv* env, jclass jclazz, jlong jopt_handle, jstring jdb_path) {
std::vector<std::string> column_family_names;
auto opt = reinterpret_cast<rocksdb::Options*>(jopt_handle);
const char* db_path = env->GetStringUTFChars(jdb_path, 0);
jobject jvalue_list = nullptr;
rocksdb::Status s = rocksdb::DB::ListColumnFamilies(*opt, db_path,
&column_family_names);
env->ReleaseStringUTFChars(jdb_path, db_path);
if (s.ok()) {
// Don't reuse class pointer
jclass jclazz = env->FindClass("java/util/ArrayList");
jmethodID mid = rocksdb::ListJni::getArrayListConstructorMethodId(env,
jclazz);
jvalue_list = env->NewObject(jclazz, mid, column_family_names.size());
for (std::vector<std::string>::size_type i = 0;
i < column_family_names.size(); i++) {
jbyteArray jvalue = env->NewByteArray(column_family_names[i].size());
env->SetByteArrayRegion(jvalue, 0, column_family_names[i].size(),
reinterpret_cast<const jbyte*>(column_family_names[i].c_str()));
env->CallBooleanMethod(jvalue_list,
rocksdb::ListJni::getListAddMethodId(env), jvalue);
}
}
return jvalue_list;
}
//////////////////////////////////////////////////////////////////////////////
// rocksdb::DB::Put
void rocksdb_put_helper(
JNIEnv* env, rocksdb::DB* db, const rocksdb::WriteOptions& write_options,
rocksdb::ColumnFamilyHandle* cf_handle, jbyteArray jkey, jint jkey_len,
jbyteArray jvalue, jint jvalue_len) {
jbyte* key = env->GetByteArrayElements(jkey, 0);
jbyte* value = env->GetByteArrayElements(jvalue, 0);
rocksdb::Slice key_slice(reinterpret_cast<char*>(key), jkey_len);
rocksdb::Slice value_slice(reinterpret_cast<char*>(value), jvalue_len);
rocksdb::Status s;
if (cf_handle != nullptr) {
s = db->Put(write_options, cf_handle, key_slice, value_slice);
} else {
// backwards compatibility
s = db->Put(write_options, key_slice, value_slice);
}
// trigger java unref on key and value.
// by passing JNI_ABORT, it will simply release the reference without
// copying the result back to the java byte array.
env->ReleaseByteArrayElements(jkey, key, JNI_ABORT);
env->ReleaseByteArrayElements(jvalue, value, JNI_ABORT);
if (s.ok()) {
return;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
}
/*
* Class: org_rocksdb_RocksDB
* Method: put
* Signature: (J[BI[BI)V
*/
void Java_org_rocksdb_RocksDB_put__J_3BI_3BI(
JNIEnv* env, jobject jdb, jlong jdb_handle,
jbyteArray jkey, jint jkey_len,
jbyteArray jvalue, jint jvalue_len) {
auto db = reinterpret_cast<rocksdb::DB*>(jdb_handle);
static const rocksdb::WriteOptions default_write_options =
rocksdb::WriteOptions();
rocksdb_put_helper(env, db, default_write_options, nullptr,
jkey, jkey_len,
jvalue, jvalue_len);
}
/*
* Class: org_rocksdb_RocksDB
* Method: put
* Signature: (J[BI[BIJ)V
*/
void Java_org_rocksdb_RocksDB_put__J_3BI_3BIJ(
JNIEnv* env, jobject jdb, jlong jdb_handle,
jbyteArray jkey, jint jkey_len,
jbyteArray jvalue, jint jvalue_len, jlong jcf_handle) {
auto db = reinterpret_cast<rocksdb::DB*>(jdb_handle);
static const rocksdb::WriteOptions default_write_options =
rocksdb::WriteOptions();
auto cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
if (cf_handle != nullptr) {
rocksdb_put_helper(env, db, default_write_options, cf_handle,
jkey, jkey_len, jvalue, jvalue_len);
} else {
rocksdb::RocksDBExceptionJni::ThrowNew(env,
rocksdb::Status::InvalidArgument("Invalid ColumnFamilyHandle."));
}
}
/*
* Class: org_rocksdb_RocksDB
* Method: put
* Signature: (JJ[BI[BI)V
*/
void Java_org_rocksdb_RocksDB_put__JJ_3BI_3BI(
JNIEnv* env, jobject jdb,
jlong jdb_handle, jlong jwrite_options_handle,
jbyteArray jkey, jint jkey_len,
jbyteArray jvalue, jint jvalue_len) {
auto db = reinterpret_cast<rocksdb::DB*>(jdb_handle);
auto write_options = reinterpret_cast<rocksdb::WriteOptions*>(
jwrite_options_handle);
rocksdb_put_helper(env, db, *write_options, nullptr,
jkey, jkey_len,
jvalue, jvalue_len);
}
/*
* Class: org_rocksdb_RocksDB
* Method: put
* Signature: (JJ[BI[BIJ)V
*/
void Java_org_rocksdb_RocksDB_put__JJ_3BI_3BIJ(
JNIEnv* env, jobject jdb,
jlong jdb_handle, jlong jwrite_options_handle,
jbyteArray jkey, jint jkey_len,
jbyteArray jvalue, jint jvalue_len, jlong jcf_handle) {
auto db = reinterpret_cast<rocksdb::DB*>(jdb_handle);
auto write_options = reinterpret_cast<rocksdb::WriteOptions*>(
jwrite_options_handle);
auto cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
if (cf_handle != nullptr) {
rocksdb_put_helper(env, db, *write_options, cf_handle,
jkey, jkey_len, jvalue, jvalue_len);
} else {
rocksdb::RocksDBExceptionJni::ThrowNew(env,
rocksdb::Status::InvalidArgument("Invalid ColumnFamilyHandle."));
}
}
//////////////////////////////////////////////////////////////////////////////
// rocksdb::DB::Write
/*
* Class: org_rocksdb_RocksDB
* Method: write
* Signature: (JJ)V
*/
void Java_org_rocksdb_RocksDB_write(
JNIEnv* env, jobject jdb,
jlong jwrite_options_handle, jlong jbatch_handle) {
rocksdb::DB* db = rocksdb::RocksDBJni::getHandle(env, jdb);
auto write_options = reinterpret_cast<rocksdb::WriteOptions*>(
jwrite_options_handle);
auto batch = reinterpret_cast<rocksdb::WriteBatch*>(jbatch_handle);
rocksdb::Status s = db->Write(*write_options, batch);
if (!s.ok()) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
}
}
//////////////////////////////////////////////////////////////////////////////
// rocksdb::DB::KeyMayExist
jboolean key_may_exist_helper(JNIEnv* env, rocksdb::DB* db,
const rocksdb::ReadOptions& read_opt,
rocksdb::ColumnFamilyHandle* cf_handle, jbyteArray jkey, jint jkey_len,
jobject jvalue) {
std::string value;
bool value_found = false;
jboolean isCopy;
jbyte* key = env->GetByteArrayElements(jkey, &isCopy);
rocksdb::Slice key_slice(reinterpret_cast<char*>(key), jkey_len);
bool keyMaxExist = db->KeyMayExist(read_opt, cf_handle, key_slice,
&value, &value_found);
if (value_found && !value.empty()) {
jclass clazz = env->GetObjectClass(jvalue);
jmethodID mid = env->GetMethodID(clazz, "append",
"(Ljava/lang/String;)Ljava/lang/StringBuffer;");
jstring new_value_str = env->NewStringUTF(value.c_str());
env->CallObjectMethod(jvalue, mid, new_value_str);
}
env->ReleaseByteArrayElements(jkey, key, JNI_ABORT);
return static_cast<jboolean>(keyMaxExist);
}
/*
* Class: org_rocksdb_RocksDB
* Method: keyMayExist
* Signature: ([BIJLjava/lang/StringBuffer;)Z
*/
jboolean Java_org_rocksdb_RocksDB_keyMayExist___3BIJLjava_lang_StringBuffer_2(
JNIEnv* env, jobject jdb, jbyteArray jkey, jint jkey_len,
jlong jcf_handle, jobject jvalue) {
rocksdb::DB* db = rocksdb::RocksDBJni::getHandle(env, jdb);
auto cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(
jcf_handle);
if (cf_handle != nullptr) {
return key_may_exist_helper(env, db, rocksdb::ReadOptions(),
cf_handle, jkey, jkey_len, jvalue);
} else {
rocksdb::RocksDBExceptionJni::ThrowNew(env,
rocksdb::Status::InvalidArgument("Invalid ColumnFamilyHandle."));
}
return true;
}
/*
* Class: org_rocksdb_RocksDB
* Method: keyMayExist
* Signature: (J[BIJLjava/lang/StringBuffer;)Z
*/
jboolean Java_org_rocksdb_RocksDB_keyMayExist__J_3BIJLjava_lang_StringBuffer_2(
JNIEnv* env, jobject jdb, jlong jread_options_handle,
jbyteArray jkey, jint jkey_len, jlong jcf_handle, jobject jvalue) {
rocksdb::DB* db = rocksdb::RocksDBJni::getHandle(env, jdb);
auto& read_options = *reinterpret_cast<rocksdb::ReadOptions*>(
jread_options_handle);
auto cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(
jcf_handle);
if (cf_handle != nullptr) {
return key_may_exist_helper(env, db, read_options, cf_handle,
jkey, jkey_len, jvalue);
} else {
rocksdb::RocksDBExceptionJni::ThrowNew(env,
rocksdb::Status::InvalidArgument("Invalid ColumnFamilyHandle."));
}
return true;
}
//////////////////////////////////////////////////////////////////////////////
// rocksdb::DB::Get
jbyteArray rocksdb_get_helper(
JNIEnv* env, rocksdb::DB* db, const rocksdb::ReadOptions& read_opt,
rocksdb::ColumnFamilyHandle* column_family_handle, jbyteArray jkey,
jint jkey_len) {
jboolean isCopy;
jbyte* key = env->GetByteArrayElements(jkey, &isCopy);
rocksdb::Slice key_slice(
reinterpret_cast<char*>(key), jkey_len);
std::string value;
rocksdb::Status s;
if (column_family_handle != nullptr) {
s = db->Get(read_opt, column_family_handle, key_slice, &value);
} else {
// backwards compatibility
s = db->Get(read_opt, key_slice, &value);
}
// trigger java unref on key.
// by passing JNI_ABORT, it will simply release the reference without
// copying the result back to the java byte array.
env->ReleaseByteArrayElements(jkey, key, JNI_ABORT);
if (s.IsNotFound()) {
return nullptr;
}
if (s.ok()) {
jbyteArray jvalue = env->NewByteArray(value.size());
env->SetByteArrayRegion(
jvalue, 0, value.size(),
reinterpret_cast<const jbyte*>(value.c_str()));
return jvalue;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
return nullptr;
}
/*
* Class: org_rocksdb_RocksDB
* Method: get
* Signature: (J[BI)[B
*/
jbyteArray Java_org_rocksdb_RocksDB_get__J_3BI(
JNIEnv* env, jobject jdb, jlong jdb_handle,
jbyteArray jkey, jint jkey_len) {
return rocksdb_get_helper(env,
reinterpret_cast<rocksdb::DB*>(jdb_handle),
rocksdb::ReadOptions(), nullptr,
jkey, jkey_len);
}
/*
* Class: org_rocksdb_RocksDB
* Method: get
* Signature: (J[BIJ)[B
*/
jbyteArray Java_org_rocksdb_RocksDB_get__J_3BIJ(
JNIEnv* env, jobject jdb, jlong jdb_handle,
jbyteArray jkey, jint jkey_len, jlong jcf_handle) {
auto db_handle = reinterpret_cast<rocksdb::DB*>(jdb_handle);
auto cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
if (cf_handle != nullptr) {
return rocksdb_get_helper(env, db_handle, rocksdb::ReadOptions(),
cf_handle, jkey, jkey_len);
} else {
rocksdb::RocksDBExceptionJni::ThrowNew(env,
rocksdb::Status::InvalidArgument("Invalid ColumnFamilyHandle."));
// will never be evaluated
return env->NewByteArray(0);
}
}
/*
* Class: org_rocksdb_RocksDB
* Method: get
* Signature: (JJ[BI)[B
*/
jbyteArray Java_org_rocksdb_RocksDB_get__JJ_3BI(
JNIEnv* env, jobject jdb, jlong jdb_handle, jlong jropt_handle,
jbyteArray jkey, jint jkey_len) {
return rocksdb_get_helper(env,
reinterpret_cast<rocksdb::DB*>(jdb_handle),
*reinterpret_cast<rocksdb::ReadOptions*>(jropt_handle), nullptr,
jkey, jkey_len);
}
/*
* Class: org_rocksdb_RocksDB
* Method: get
* Signature: (JJ[BIJ)[B
*/
jbyteArray Java_org_rocksdb_RocksDB_get__JJ_3BIJ(
JNIEnv* env, jobject jdb, jlong jdb_handle, jlong jropt_handle,
jbyteArray jkey, jint jkey_len, jlong jcf_handle) {
auto db_handle = reinterpret_cast<rocksdb::DB*>(jdb_handle);
auto& ro_opt = *reinterpret_cast<rocksdb::ReadOptions*>(jropt_handle);
auto cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
if (cf_handle != nullptr) {
return rocksdb_get_helper(env, db_handle, ro_opt, cf_handle,
jkey, jkey_len);
} else {
rocksdb::RocksDBExceptionJni::ThrowNew(env,
rocksdb::Status::InvalidArgument("Invalid ColumnFamilyHandle."));
// will never be evaluated
return env->NewByteArray(0);
}
}
jint rocksdb_get_helper(
JNIEnv* env, rocksdb::DB* db, const rocksdb::ReadOptions& read_options,
rocksdb::ColumnFamilyHandle* column_family_handle, jbyteArray jkey,
jint jkey_len, jbyteArray jvalue, jint jvalue_len) {
static const int kNotFound = -1;
static const int kStatusError = -2;
jbyte* key = env->GetByteArrayElements(jkey, 0);
rocksdb::Slice key_slice(
reinterpret_cast<char*>(key), jkey_len);
// TODO(yhchiang): we might save one memory allocation here by adding
// a DB::Get() function which takes preallocated jbyte* as input.
std::string cvalue;
rocksdb::Status s;
if (column_family_handle != nullptr) {
s = db->Get(read_options, column_family_handle, key_slice, &cvalue);
} else {
// backwards compatibility
s = db->Get(read_options, key_slice, &cvalue);
}
// trigger java unref on key.
// by passing JNI_ABORT, it will simply release the reference without
// copying the result back to the java byte array.
env->ReleaseByteArrayElements(jkey, key, JNI_ABORT);
if (s.IsNotFound()) {
return kNotFound;
} else if (!s.ok()) {
// Here since we are throwing a Java exception from c++ side.
// As a result, c++ does not know calling this function will in fact
// throwing an exception. As a result, the execution flow will
// not stop here, and codes after this throw will still be
// executed.
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
// Return a dummy const value to avoid compilation error, although
// java side might not have a chance to get the return value :)
return kStatusError;
}
int cvalue_len = static_cast<int>(cvalue.size());
int length = std::min(jvalue_len, cvalue_len);
env->SetByteArrayRegion(
jvalue, 0, length,
reinterpret_cast<const jbyte*>(cvalue.c_str()));
return cvalue_len;
}
// cf multi get
jobject multi_get_helper(JNIEnv* env, jobject jdb, rocksdb::DB* db,
const rocksdb::ReadOptions& rOpt, jobject jkey_list, jint jkeys_count,
jobject jcfhandle_list) {
std::vector<rocksdb::Slice> keys;
std::vector<jbyte*> keys_to_free;
std::vector<rocksdb::ColumnFamilyHandle*> cf_handles;
if (jcfhandle_list != nullptr) {
// get cf iterator
jobject cfIteratorObj = env->CallObjectMethod(
jcfhandle_list, rocksdb::ListJni::getIteratorMethod(env));
// iterate over keys and convert java byte array to slice
while (env->CallBooleanMethod(
cfIteratorObj, rocksdb::ListJni::getHasNextMethod(env)) == JNI_TRUE) {
jobject jobj = (jbyteArray) env->CallObjectMethod(
cfIteratorObj, rocksdb::ListJni::getNextMethod(env));
rocksdb::ColumnFamilyHandle* cfHandle =
rocksdb::ColumnFamilyHandleJni::getHandle(env, jobj);
cf_handles.push_back(cfHandle);
}
}
// Process key list
// get iterator
jobject iteratorObj = env->CallObjectMethod(
jkey_list, rocksdb::ListJni::getIteratorMethod(env));
// iterate over keys and convert java byte array to slice
while (env->CallBooleanMethod(
iteratorObj, rocksdb::ListJni::getHasNextMethod(env)) == JNI_TRUE) {
jbyteArray jkey = (jbyteArray) env->CallObjectMethod(
iteratorObj, rocksdb::ListJni::getNextMethod(env));
jint key_length = env->GetArrayLength(jkey);
jbyte* key = new jbyte[key_length];
env->GetByteArrayRegion(jkey, 0, key_length, key);
// store allocated jbyte to free it after multiGet call
keys_to_free.push_back(key);
rocksdb::Slice key_slice(
reinterpret_cast<char*>(key), key_length);
keys.push_back(key_slice);
}
std::vector<std::string> values;
std::vector<rocksdb::Status> s;
if (cf_handles.size() == 0) {
s = db->MultiGet(rOpt, keys, &values);
} else {
s = db->MultiGet(rOpt, cf_handles, keys, &values);
}
// Don't reuse class pointer
jclass jclazz = env->FindClass("java/util/ArrayList");
jmethodID mid = rocksdb::ListJni::getArrayListConstructorMethodId(
env, jclazz);
jobject jvalue_list = env->NewObject(jclazz, mid, jkeys_count);
// insert in java list
for (std::vector<rocksdb::Status>::size_type i = 0; i != s.size(); i++) {
if (s[i].ok()) {
jbyteArray jvalue = env->NewByteArray(values[i].size());
env->SetByteArrayRegion(
jvalue, 0, values[i].size(),
reinterpret_cast<const jbyte*>(values[i].c_str()));
env->CallBooleanMethod(
jvalue_list, rocksdb::ListJni::getListAddMethodId(env), jvalue);
} else {
env->CallBooleanMethod(
jvalue_list, rocksdb::ListJni::getListAddMethodId(env), nullptr);
}
}
// free up allocated byte arrays
for (std::vector<jbyte*>::size_type i = 0; i != keys_to_free.size(); i++) {
delete[] keys_to_free[i];
}
keys_to_free.clear();
return jvalue_list;
}
/*
* Class: org_rocksdb_RocksDB
* Method: multiGet
* Signature: (JLjava/util/List;I)Ljava/util/List;
*/
jobject Java_org_rocksdb_RocksDB_multiGet__JLjava_util_List_2I(
JNIEnv* env, jobject jdb, jlong jdb_handle,
jobject jkey_list, jint jkeys_count) {
return multi_get_helper(env, jdb, reinterpret_cast<rocksdb::DB*>(jdb_handle),
rocksdb::ReadOptions(), jkey_list, jkeys_count, nullptr);
}
/*
* Class: org_rocksdb_RocksDB
* Method: multiGet
* Signature: (JLjava/util/List;ILjava/util/List;)Ljava/util/List;
*/
jobject
Java_org_rocksdb_RocksDB_multiGet__JLjava_util_List_2ILjava_util_List_2(
JNIEnv* env, jobject jdb, jlong jdb_handle,
jobject jkey_list, jint jkeys_count, jobject jcfhandle_list) {
return multi_get_helper(env, jdb, reinterpret_cast<rocksdb::DB*>(jdb_handle),
rocksdb::ReadOptions(), jkey_list, jkeys_count, jcfhandle_list);
}
/*
* Class: org_rocksdb_RocksDB
* Method: multiGet
* Signature: (JJLjava/util/List;I)Ljava/util/List;
*/
jobject Java_org_rocksdb_RocksDB_multiGet__JJLjava_util_List_2I(
JNIEnv* env, jobject jdb, jlong jdb_handle,
jlong jropt_handle, jobject jkey_list, jint jkeys_count) {
return multi_get_helper(env, jdb, reinterpret_cast<rocksdb::DB*>(jdb_handle),
*reinterpret_cast<rocksdb::ReadOptions*>(jropt_handle), jkey_list,
jkeys_count, nullptr);
}
/*
* Class: org_rocksdb_RocksDB
* Method: multiGet
* Signature: (JJLjava/util/List;ILjava/util/List;)Ljava/util/List;
*/
jobject
Java_org_rocksdb_RocksDB_multiGet__JJLjava_util_List_2ILjava_util_List_2(
JNIEnv* env, jobject jdb, jlong jdb_handle,
jlong jropt_handle, jobject jkey_list, jint jkeys_count,
jobject jcfhandle_list) {
return multi_get_helper(env, jdb, reinterpret_cast<rocksdb::DB*>(jdb_handle),
*reinterpret_cast<rocksdb::ReadOptions*>(jropt_handle), jkey_list,
jkeys_count, jcfhandle_list);
}
/*
* Class: org_rocksdb_RocksDB
* Method: get
* Signature: (J[BI[BI)I
*/
jint Java_org_rocksdb_RocksDB_get__J_3BI_3BI(
JNIEnv* env, jobject jdb, jlong jdb_handle,
jbyteArray jkey, jint jkey_len,
jbyteArray jvalue, jint jvalue_len) {
return rocksdb_get_helper(env,
reinterpret_cast<rocksdb::DB*>(jdb_handle),
rocksdb::ReadOptions(), nullptr,
jkey, jkey_len, jvalue, jvalue_len);
}
/*
* Class: org_rocksdb_RocksDB
* Method: get
* Signature: (J[BI[BIJ)I
*/
jint Java_org_rocksdb_RocksDB_get__J_3BI_3BIJ(
JNIEnv* env, jobject jdb, jlong jdb_handle,
jbyteArray jkey, jint jkey_len,
jbyteArray jvalue, jint jvalue_len, jlong jcf_handle) {
auto db_handle = reinterpret_cast<rocksdb::DB*>(jdb_handle);
auto cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
if (cf_handle != nullptr) {
return rocksdb_get_helper(env, db_handle, rocksdb::ReadOptions(), cf_handle,
jkey, jkey_len, jvalue, jvalue_len);
} else {
rocksdb::RocksDBExceptionJni::ThrowNew(env,
rocksdb::Status::InvalidArgument("Invalid ColumnFamilyHandle."));
// will never be evaluated
return 0;
}
}
/*
* Class: org_rocksdb_RocksDB
* Method: get
* Signature: (JJ[BI[BI)I
*/
jint Java_org_rocksdb_RocksDB_get__JJ_3BI_3BI(
JNIEnv* env, jobject jdb, jlong jdb_handle, jlong jropt_handle,
jbyteArray jkey, jint jkey_len,
jbyteArray jvalue, jint jvalue_len) {
return rocksdb_get_helper(env,
reinterpret_cast<rocksdb::DB*>(jdb_handle),
*reinterpret_cast<rocksdb::ReadOptions*>(jropt_handle),
nullptr, jkey, jkey_len, jvalue, jvalue_len);
}
/*
* Class: org_rocksdb_RocksDB
* Method: get
* Signature: (JJ[BI[BIJ)I
*/
jint Java_org_rocksdb_RocksDB_get__JJ_3BI_3BIJ(
JNIEnv* env, jobject jdb, jlong jdb_handle, jlong jropt_handle,
jbyteArray jkey, jint jkey_len,
jbyteArray jvalue, jint jvalue_len, jlong jcf_handle) {
auto db_handle = reinterpret_cast<rocksdb::DB*>(jdb_handle);
auto& ro_opt = *reinterpret_cast<rocksdb::ReadOptions*>(jropt_handle);
auto cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
if (cf_handle != nullptr) {
return rocksdb_get_helper(env, db_handle, ro_opt, cf_handle, jkey,
jkey_len, jvalue, jvalue_len);
} else {
rocksdb::RocksDBExceptionJni::ThrowNew(env,
rocksdb::Status::InvalidArgument("Invalid ColumnFamilyHandle."));
// will never be evaluated
return 0;
}
}
//////////////////////////////////////////////////////////////////////////////
// rocksdb::DB::Delete()
void rocksdb_remove_helper(
JNIEnv* env, rocksdb::DB* db, const rocksdb::WriteOptions& write_options,
rocksdb::ColumnFamilyHandle* cf_handle, jbyteArray jkey, jint jkey_len) {
jbyte* key = env->GetByteArrayElements(jkey, 0);
rocksdb::Slice key_slice(reinterpret_cast<char*>(key), jkey_len);
rocksdb::Status s;
if (cf_handle != nullptr) {
s = db->Delete(write_options, cf_handle, key_slice);
} else {
// backwards compatibility
s = db->Delete(write_options, key_slice);
}
// trigger java unref on key and value.
// by passing JNI_ABORT, it will simply release the reference without
// copying the result back to the java byte array.
env->ReleaseByteArrayElements(jkey, key, JNI_ABORT);
if (!s.ok()) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
}
return;
}
/*
* Class: org_rocksdb_RocksDB
* Method: remove
* Signature: (J[BI)V
*/
void Java_org_rocksdb_RocksDB_remove__J_3BI(
JNIEnv* env, jobject jdb, jlong jdb_handle,
jbyteArray jkey, jint jkey_len) {
auto db = reinterpret_cast<rocksdb::DB*>(jdb_handle);
static const rocksdb::WriteOptions default_write_options =
rocksdb::WriteOptions();
rocksdb_remove_helper(env, db, default_write_options, nullptr,
jkey, jkey_len);
}
/*
* Class: org_rocksdb_RocksDB
* Method: remove
* Signature: (J[BIJ)V
*/
void Java_org_rocksdb_RocksDB_remove__J_3BIJ(
JNIEnv* env, jobject jdb, jlong jdb_handle,
jbyteArray jkey, jint jkey_len, jlong jcf_handle) {
auto db = reinterpret_cast<rocksdb::DB*>(jdb_handle);
static const rocksdb::WriteOptions default_write_options =
rocksdb::WriteOptions();
auto cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
if (cf_handle != nullptr) {
rocksdb_remove_helper(env, db, default_write_options, cf_handle,
jkey, jkey_len);
} else {
rocksdb::RocksDBExceptionJni::ThrowNew(env,
rocksdb::Status::InvalidArgument("Invalid ColumnFamilyHandle."));
}
}
/*
* Class: org_rocksdb_RocksDB
* Method: remove
* Signature: (JJ[BIJ)V
*/
void Java_org_rocksdb_RocksDB_remove__JJ_3BI(
JNIEnv* env, jobject jdb, jlong jdb_handle,
jlong jwrite_options, jbyteArray jkey, jint jkey_len) {
auto db = reinterpret_cast<rocksdb::DB*>(jdb_handle);
auto write_options = reinterpret_cast<rocksdb::WriteOptions*>(jwrite_options);
rocksdb_remove_helper(env, db, *write_options, nullptr, jkey, jkey_len);
}
/*
* Class: org_rocksdb_RocksDB
* Method: remove
* Signature: (JJ[BIJ)V
*/
void Java_org_rocksdb_RocksDB_remove__JJ_3BIJ(
JNIEnv* env, jobject jdb, jlong jdb_handle,
jlong jwrite_options, jbyteArray jkey, jint jkey_len,
jlong jcf_handle) {
auto db = reinterpret_cast<rocksdb::DB*>(jdb_handle);
auto write_options = reinterpret_cast<rocksdb::WriteOptions*>(jwrite_options);
auto cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
if (cf_handle != nullptr) {
rocksdb_remove_helper(env, db, *write_options, cf_handle, jkey, jkey_len);
} else {
rocksdb::RocksDBExceptionJni::ThrowNew(env,
rocksdb::Status::InvalidArgument("Invalid ColumnFamilyHandle."));
}
}
//////////////////////////////////////////////////////////////////////////////
// rocksdb::DB::Merge
void rocksdb_merge_helper(
JNIEnv* env, rocksdb::DB* db, const rocksdb::WriteOptions& write_options,
jbyteArray jkey, jint jkey_len,
jbyteArray jvalue, jint jvalue_len) {
jbyte* key = env->GetByteArrayElements(jkey, 0);
jbyte* value = env->GetByteArrayElements(jvalue, 0);
rocksdb::Slice key_slice(reinterpret_cast<char*>(key), jkey_len);
rocksdb::Slice value_slice(reinterpret_cast<char*>(value), jvalue_len);
rocksdb::Status s = db->Merge(write_options, key_slice, value_slice);
// trigger java unref on key and value.
// by passing JNI_ABORT, it will simply release the reference without
// copying the result back to the java byte array.
env->ReleaseByteArrayElements(jkey, key, JNI_ABORT);
env->ReleaseByteArrayElements(jvalue, value, JNI_ABORT);
if (s.ok()) {
return;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
}
/*
* Class: org_rocksdb_RocksDB
* Method: merge
* Signature: (J[BI[BI)V
*/
void Java_org_rocksdb_RocksDB_merge__J_3BI_3BI(
JNIEnv* env, jobject jdb, jlong jdb_handle,
jbyteArray jkey, jint jkey_len,
jbyteArray jvalue, jint jvalue_len) {
auto db = reinterpret_cast<rocksdb::DB*>(jdb_handle);
static const rocksdb::WriteOptions default_write_options =
rocksdb::WriteOptions();
rocksdb_merge_helper(env, db, default_write_options,
jkey, jkey_len,
jvalue, jvalue_len);
}
/*
* Class: org_rocksdb_RocksDB
* Method: merge
* Signature: (JJ[BI[BI)V
*/
void Java_org_rocksdb_RocksDB_merge__JJ_3BI_3BI(
JNIEnv* env, jobject jdb,
jlong jdb_handle, jlong jwrite_options_handle,
jbyteArray jkey, jint jkey_len,
jbyteArray jvalue, jint jvalue_len) {
auto db = reinterpret_cast<rocksdb::DB*>(jdb_handle);
auto write_options = reinterpret_cast<rocksdb::WriteOptions*>(
jwrite_options_handle);
rocksdb_merge_helper(env, db, *write_options,
jkey, jkey_len,
jvalue, jvalue_len);
}
//////////////////////////////////////////////////////////////////////////////
// rocksdb::DB::~DB()
/*
* Class: org_rocksdb_RocksDB
* Method: disposeInternal
* Signature: (J)V
*/
void Java_org_rocksdb_RocksDB_disposeInternal(
JNIEnv* env, jobject java_db, jlong jhandle) {
delete reinterpret_cast<rocksdb::DB*>(jhandle);
}
/*
* Class: org_rocksdb_RocksDB
* Method: iterator0
* Signature: (J)J
*/
jlong Java_org_rocksdb_RocksDB_iterator0__J(
JNIEnv* env, jobject jdb, jlong db_handle) {
auto db = reinterpret_cast<rocksdb::DB*>(db_handle);
rocksdb::Iterator* iterator = db->NewIterator(rocksdb::ReadOptions());
return reinterpret_cast<jlong>(iterator);
}
/*
* Class: org_rocksdb_RocksDB
* Method: iterator0
* Signature: (JJ)J
*/
jlong Java_org_rocksdb_RocksDB_iterator0__JJ(
JNIEnv* env, jobject jdb, jlong db_handle, jlong jcf_handle) {
auto db = reinterpret_cast<rocksdb::DB*>(db_handle);
auto cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
rocksdb::Iterator* iterator = db->NewIterator(rocksdb::ReadOptions(),
cf_handle);
return reinterpret_cast<jlong>(iterator);
}
/*
* Class: org_rocksdb_RocksDB
* Method: iterators
* Signature: (JLjava/util/List;)[J
*/
jlongArray Java_org_rocksdb_RocksDB_iterators(
JNIEnv* env, jobject jdb, jlong db_handle, jobject jcfhandle_list) {
auto db = reinterpret_cast<rocksdb::DB*>(db_handle);
std::vector<rocksdb::ColumnFamilyHandle*> cf_handles;
std::vector<rocksdb::Iterator*> iterators;
if (jcfhandle_list != nullptr) {
// get cf iterator
jobject cfIteratorObj = env->CallObjectMethod(
jcfhandle_list, rocksdb::ListJni::getIteratorMethod(env));
// iterate over keys and convert java byte array to slice
while (env->CallBooleanMethod(
cfIteratorObj, rocksdb::ListJni::getHasNextMethod(env)) == JNI_TRUE) {
jobject jobj = (jbyteArray) env->CallObjectMethod(
cfIteratorObj, rocksdb::ListJni::getNextMethod(env));
rocksdb::ColumnFamilyHandle* cfHandle =
rocksdb::ColumnFamilyHandleJni::getHandle(env, jobj);
cf_handles.push_back(cfHandle);
}
}
rocksdb::Status s = db->NewIterators(rocksdb::ReadOptions(),
cf_handles, &iterators);
if (s.ok()) {
jlongArray jLongArray = env->NewLongArray(iterators.size());
for (std::vector<rocksdb::Iterator*>::size_type i = 0;
i < iterators.size(); i++) {
env->SetLongArrayRegion(jLongArray, i, 1,
reinterpret_cast<const jlong*>(&iterators[i]));
}
return jLongArray;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
return env->NewLongArray(0);
}
/*
* Class: org_rocksdb_RocksDB
* Method: createColumnFamily
* Signature: (JLjava/lang/String;)J;
*/
jlong Java_org_rocksdb_RocksDB_createColumnFamily(
JNIEnv* env, jobject jdb, jlong jdb_handle, jstring jcfname) {
rocksdb::ColumnFamilyHandle* handle;
const char* cfname = env->GetStringUTFChars(jcfname, 0);
auto db_handle = reinterpret_cast<rocksdb::DB*>(jdb_handle);
rocksdb::Status s = db_handle->CreateColumnFamily(
rocksdb::ColumnFamilyOptions(), cfname, &handle);
env->ReleaseStringUTFChars(jcfname, cfname);
if (s.ok()) {
return reinterpret_cast<jlong>(handle);
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
return 0;
}
/*
* Class: org_rocksdb_RocksDB
* Method: dropColumnFamily
* Signature: (JJ)V;
*/
void Java_org_rocksdb_RocksDB_dropColumnFamily(
JNIEnv* env, jobject jdb, jlong jdb_handle, jlong jcf_handle) {
auto cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
auto db_handle = reinterpret_cast<rocksdb::DB*>(jdb_handle);
rocksdb::Status s = db_handle->DropColumnFamily(cf_handle);
if (!s.ok()) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
}
}
/*
* Method: getSnapshot
* Signature: (J)J
*/
jlong Java_org_rocksdb_RocksDB_getSnapshot(
JNIEnv* env, jobject jdb, jlong db_handle) {
auto db = reinterpret_cast<rocksdb::DB*>(db_handle);
const rocksdb::Snapshot* snapshot = db->GetSnapshot();
return reinterpret_cast<jlong>(snapshot);
}
/*
* Method: releaseSnapshot
* Signature: (JJ)V
*/
void Java_org_rocksdb_RocksDB_releaseSnapshot(
JNIEnv* env, jobject jdb, jlong db_handle, jlong snapshot_handle) {
auto db = reinterpret_cast<rocksdb::DB*>(db_handle);
auto snapshot = reinterpret_cast<rocksdb::Snapshot*>(snapshot_handle);
db->ReleaseSnapshot(snapshot);
}
/*
* Class: org_rocksdb_RocksDB
* Method: getProperty0
* Signature: (JLjava/lang/String;I)Ljava/lang/String;
*/
jstring Java_org_rocksdb_RocksDB_getProperty0__JLjava_lang_String_2I(
JNIEnv* env, jobject jdb, jlong db_handle, jstring jproperty,
jint jproperty_len) {
auto db = reinterpret_cast<rocksdb::DB*>(db_handle);
const char* property = env->GetStringUTFChars(jproperty, 0);
rocksdb::Slice property_slice(property, jproperty_len);
std::string property_value;
bool retCode = db->GetProperty(property_slice, &property_value);
env->ReleaseStringUTFChars(jproperty, property);
if (!retCode) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, rocksdb::Status::NotFound());
}
return env->NewStringUTF(property_value.data());
}
/*
* Class: org_rocksdb_RocksDB
* Method: getProperty0
* Signature: (JJLjava/lang/String;I)Ljava/lang/String;
*/
jstring Java_org_rocksdb_RocksDB_getProperty0__JJLjava_lang_String_2I(
JNIEnv* env, jobject jdb, jlong db_handle, jlong jcf_handle,
jstring jproperty, jint jproperty_len) {
auto db = reinterpret_cast<rocksdb::DB*>(db_handle);
auto cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
const char* property = env->GetStringUTFChars(jproperty, 0);
rocksdb::Slice property_slice(property, jproperty_len);
std::string property_value;
bool retCode = db->GetProperty(cf_handle, property_slice, &property_value);
env->ReleaseStringUTFChars(jproperty, property);
if (!retCode) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, rocksdb::Status::NotFound());
}
return env->NewStringUTF(property_value.data());
}