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rocksdb/java/rocksjni/transaction_db.cc

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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++
// for rocksdb::TransactionDB.
#include <jni.h>
#include <functional>
#include <memory>
#include <utility>
#include "include/org_rocksdb_TransactionDB.h"
#include "rocksdb/options.h"
#include "rocksdb/utilities/transaction.h"
#include "rocksdb/utilities/transaction_db.h"
#include "rocksjni/portal.h"
/*
* Class: org_rocksdb_TransactionDB
* Method: open
* Signature: (JJLjava/lang/String;)J
*/
jlong Java_org_rocksdb_TransactionDB_open__JJLjava_lang_String_2(
JNIEnv* env, jclass /*jcls*/, jlong joptions_handle,
jlong jtxn_db_options_handle, jstring jdb_path) {
auto* options = reinterpret_cast<rocksdb::Options*>(joptions_handle);
auto* txn_db_options =
reinterpret_cast<rocksdb::TransactionDBOptions*>(jtxn_db_options_handle);
rocksdb::TransactionDB* tdb = nullptr;
const char* db_path = env->GetStringUTFChars(jdb_path, nullptr);
if (db_path == nullptr) {
// exception thrown: OutOfMemoryError
return 0;
}
rocksdb::Status s =
rocksdb::TransactionDB::Open(*options, *txn_db_options, db_path, &tdb);
env->ReleaseStringUTFChars(jdb_path, db_path);
if (s.ok()) {
return reinterpret_cast<jlong>(tdb);
} else {
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
return 0;
}
}
/*
* Class: org_rocksdb_TransactionDB
* Method: open
* Signature: (JJLjava/lang/String;[[B[J)[J
*/
jlongArray Java_org_rocksdb_TransactionDB_open__JJLjava_lang_String_2_3_3B_3J(
JNIEnv* env, jclass /*jcls*/, jlong jdb_options_handle,
jlong jtxn_db_options_handle, jstring jdb_path, jobjectArray jcolumn_names,
jlongArray jcolumn_options_handles) {
const char* db_path = env->GetStringUTFChars(jdb_path, nullptr);
if (db_path == nullptr) {
// exception thrown: OutOfMemoryError
return nullptr;
}
const jsize len_cols = env->GetArrayLength(jcolumn_names);
if (env->EnsureLocalCapacity(len_cols) != 0) {
// out of memory
env->ReleaseStringUTFChars(jdb_path, db_path);
return nullptr;
}
jlong* jco = env->GetLongArrayElements(jcolumn_options_handles, nullptr);
if (jco == nullptr) {
// exception thrown: OutOfMemoryError
env->ReleaseStringUTFChars(jdb_path, db_path);
return nullptr;
}
std::vector<rocksdb::ColumnFamilyDescriptor> column_families;
for (int i = 0; i < len_cols; i++) {
const jobject jcn = env->GetObjectArrayElement(jcolumn_names, i);
if (env->ExceptionCheck()) {
// exception thrown: ArrayIndexOutOfBoundsException
env->ReleaseLongArrayElements(jcolumn_options_handles, jco, JNI_ABORT);
env->ReleaseStringUTFChars(jdb_path, db_path);
return nullptr;
}
const jbyteArray jcn_ba = reinterpret_cast<jbyteArray>(jcn);
jbyte* jcf_name = env->GetByteArrayElements(jcn_ba, nullptr);
if (jcf_name == nullptr) {
// exception thrown: OutOfMemoryError
env->DeleteLocalRef(jcn);
env->ReleaseLongArrayElements(jcolumn_options_handles, jco, JNI_ABORT);
env->ReleaseStringUTFChars(jdb_path, db_path);
return nullptr;
}
const int jcf_name_len = env->GetArrayLength(jcn_ba);
if (env->EnsureLocalCapacity(jcf_name_len) != 0) {
// out of memory
env->ReleaseByteArrayElements(jcn_ba, jcf_name, JNI_ABORT);
env->DeleteLocalRef(jcn);
env->ReleaseLongArrayElements(jcolumn_options_handles, jco, JNI_ABORT);
env->ReleaseStringUTFChars(jdb_path, db_path);
return nullptr;
}
const std::string cf_name(reinterpret_cast<char*>(jcf_name), jcf_name_len);
const rocksdb::ColumnFamilyOptions* cf_options =
reinterpret_cast<rocksdb::ColumnFamilyOptions*>(jco[i]);
column_families.push_back(
rocksdb::ColumnFamilyDescriptor(cf_name, *cf_options));
env->ReleaseByteArrayElements(jcn_ba, jcf_name, JNI_ABORT);
env->DeleteLocalRef(jcn);
}
env->ReleaseLongArrayElements(jcolumn_options_handles, jco, JNI_ABORT);
auto* db_options = reinterpret_cast<rocksdb::DBOptions*>(jdb_options_handle);
auto* txn_db_options =
reinterpret_cast<rocksdb::TransactionDBOptions*>(jtxn_db_options_handle);
std::vector<rocksdb::ColumnFamilyHandle*> handles;
rocksdb::TransactionDB* tdb = nullptr;
const rocksdb::Status s = rocksdb::TransactionDB::Open(
*db_options, *txn_db_options, db_path, column_families, &handles, &tdb);
// 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] = reinterpret_cast<jlong>(tdb);
for (int i = 1; i <= len_cols; i++) {
results[i] = reinterpret_cast<jlong>(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::RocksDBExceptionJni::ThrowNew(env, s);
return nullptr;
}
}
/*
* Class: org_rocksdb_TransactionDB
* Method: beginTransaction
* Signature: (JJ)J
*/
jlong Java_org_rocksdb_TransactionDB_beginTransaction__JJ(
JNIEnv* /*env*/, jobject /*jobj*/, jlong jhandle,
jlong jwrite_options_handle) {
auto* txn_db = reinterpret_cast<rocksdb::TransactionDB*>(jhandle);
auto* write_options =
reinterpret_cast<rocksdb::WriteOptions*>(jwrite_options_handle);
rocksdb::Transaction* txn = txn_db->BeginTransaction(*write_options);
return reinterpret_cast<jlong>(txn);
}
/*
* Class: org_rocksdb_TransactionDB
* Method: beginTransaction
* Signature: (JJJ)J
*/
jlong Java_org_rocksdb_TransactionDB_beginTransaction__JJJ(
JNIEnv* /*env*/, jobject /*jobj*/, jlong jhandle,
jlong jwrite_options_handle, jlong jtxn_options_handle) {
auto* txn_db = reinterpret_cast<rocksdb::TransactionDB*>(jhandle);
auto* write_options =
reinterpret_cast<rocksdb::WriteOptions*>(jwrite_options_handle);
auto* txn_options =
reinterpret_cast<rocksdb::TransactionOptions*>(jtxn_options_handle);
rocksdb::Transaction* txn =
txn_db->BeginTransaction(*write_options, *txn_options);
return reinterpret_cast<jlong>(txn);
}
/*
* Class: org_rocksdb_TransactionDB
* Method: beginTransaction_withOld
* Signature: (JJJ)J
*/
jlong Java_org_rocksdb_TransactionDB_beginTransaction_1withOld__JJJ(
JNIEnv* /*env*/, jobject /*jobj*/, jlong jhandle,
jlong jwrite_options_handle, jlong jold_txn_handle) {
auto* txn_db = reinterpret_cast<rocksdb::TransactionDB*>(jhandle);
auto* write_options =
reinterpret_cast<rocksdb::WriteOptions*>(jwrite_options_handle);
auto* old_txn = reinterpret_cast<rocksdb::Transaction*>(jold_txn_handle);
rocksdb::TransactionOptions txn_options;
rocksdb::Transaction* txn =
txn_db->BeginTransaction(*write_options, txn_options, old_txn);
// RocksJava relies on the assumption that
// we do not allocate a new Transaction object
// when providing an old_txn
assert(txn == old_txn);
return reinterpret_cast<jlong>(txn);
}
/*
* Class: org_rocksdb_TransactionDB
* Method: beginTransaction_withOld
* Signature: (JJJJ)J
*/
jlong Java_org_rocksdb_TransactionDB_beginTransaction_1withOld__JJJJ(
JNIEnv* /*env*/, jobject /*jobj*/, jlong jhandle,
jlong jwrite_options_handle, jlong jtxn_options_handle,
jlong jold_txn_handle) {
auto* txn_db = reinterpret_cast<rocksdb::TransactionDB*>(jhandle);
auto* write_options =
reinterpret_cast<rocksdb::WriteOptions*>(jwrite_options_handle);
auto* txn_options =
reinterpret_cast<rocksdb::TransactionOptions*>(jtxn_options_handle);
auto* old_txn = reinterpret_cast<rocksdb::Transaction*>(jold_txn_handle);
rocksdb::Transaction* txn =
txn_db->BeginTransaction(*write_options, *txn_options, old_txn);
// RocksJava relies on the assumption that
// we do not allocate a new Transaction object
// when providing an old_txn
assert(txn == old_txn);
return reinterpret_cast<jlong>(txn);
}
/*
* Class: org_rocksdb_TransactionDB
* Method: getTransactionByName
* Signature: (JLjava/lang/String;)J
*/
jlong Java_org_rocksdb_TransactionDB_getTransactionByName(JNIEnv* env,
jobject /*jobj*/,
jlong jhandle,
jstring jname) {
auto* txn_db = reinterpret_cast<rocksdb::TransactionDB*>(jhandle);
const char* name = env->GetStringUTFChars(jname, nullptr);
if (name == nullptr) {
// exception thrown: OutOfMemoryError
return 0;
}
rocksdb::Transaction* txn = txn_db->GetTransactionByName(name);
env->ReleaseStringUTFChars(jname, name);
return reinterpret_cast<jlong>(txn);
}
/*
* Class: org_rocksdb_TransactionDB
* Method: getAllPreparedTransactions
* Signature: (J)[J
*/
jlongArray Java_org_rocksdb_TransactionDB_getAllPreparedTransactions(
JNIEnv* env, jobject /*jobj*/, jlong jhandle) {
auto* txn_db = reinterpret_cast<rocksdb::TransactionDB*>(jhandle);
std::vector<rocksdb::Transaction*> txns;
txn_db->GetAllPreparedTransactions(&txns);
const size_t size = txns.size();
assert(size < UINT32_MAX); // does it fit in a jint?
const jsize len = static_cast<jsize>(size);
jlong tmp[len];
for (jsize i = 0; i < len; ++i) {
tmp[i] = reinterpret_cast<jlong>(txns[i]);
}
jlongArray jtxns = env->NewLongArray(len);
if (jtxns == nullptr) {
// exception thrown: OutOfMemoryError
return nullptr;
}
env->SetLongArrayRegion(jtxns, 0, len, tmp);
if (env->ExceptionCheck()) {
// exception thrown: ArrayIndexOutOfBoundsException
env->DeleteLocalRef(jtxns);
return nullptr;
}
return jtxns;
}
/*
* Class: org_rocksdb_TransactionDB
* Method: getLockStatusData
* Signature: (J)Ljava/util/Map;
*/
jobject Java_org_rocksdb_TransactionDB_getLockStatusData(JNIEnv* env,
jobject /*jobj*/,
jlong jhandle) {
auto* txn_db = reinterpret_cast<rocksdb::TransactionDB*>(jhandle);
const std::unordered_multimap<uint32_t, rocksdb::KeyLockInfo>
lock_status_data = txn_db->GetLockStatusData();
const jobject jlock_status_data = rocksdb::HashMapJni::construct(
env, static_cast<uint32_t>(lock_status_data.size()));
if (jlock_status_data == nullptr) {
// exception occurred
return nullptr;
}
const rocksdb::HashMapJni::FnMapKV<const int32_t, const rocksdb::KeyLockInfo>
fn_map_kv =
[env](
const std::pair<const int32_t, const rocksdb::KeyLockInfo>&
pair) {
const jobject jlong_column_family_id =
rocksdb::LongJni::valueOf(env, pair.first);
if (jlong_column_family_id == nullptr) {
// an error occurred
return std::unique_ptr<std::pair<jobject, jobject>>(nullptr);
}
const jobject jkey_lock_info =
rocksdb::KeyLockInfoJni::construct(env, pair.second);
if (jkey_lock_info == nullptr) {
// an error occurred
return std::unique_ptr<std::pair<jobject, jobject>>(nullptr);
}
return std::unique_ptr<std::pair<jobject, jobject>>(
new std::pair<jobject, jobject>(jlong_column_family_id,
jkey_lock_info));
};
if (!rocksdb::HashMapJni::putAll(env, jlock_status_data,
lock_status_data.begin(),
lock_status_data.end(), fn_map_kv)) {
// exception occcurred
return nullptr;
}
return jlock_status_data;
}
/*
* Class: org_rocksdb_TransactionDB
* Method: getDeadlockInfoBuffer
* Signature: (J)[Lorg/rocksdb/TransactionDB/DeadlockPath;
*/
jobjectArray Java_org_rocksdb_TransactionDB_getDeadlockInfoBuffer(
JNIEnv* env, jobject jobj, jlong jhandle) {
auto* txn_db = reinterpret_cast<rocksdb::TransactionDB*>(jhandle);
const std::vector<rocksdb::DeadlockPath> deadlock_info_buffer =
txn_db->GetDeadlockInfoBuffer();
const jsize deadlock_info_buffer_len =
static_cast<jsize>(deadlock_info_buffer.size());
jobjectArray jdeadlock_info_buffer =
env->NewObjectArray(deadlock_info_buffer_len,
rocksdb::DeadlockPathJni::getJClass(env), nullptr);
if (jdeadlock_info_buffer == nullptr) {
// exception thrown: OutOfMemoryError
return nullptr;
}
jsize jdeadlock_info_buffer_offset = 0;
auto buf_end = deadlock_info_buffer.end();
for (auto buf_it = deadlock_info_buffer.begin(); buf_it != buf_end;
++buf_it) {
const rocksdb::DeadlockPath deadlock_path = *buf_it;
const std::vector<rocksdb::DeadlockInfo> deadlock_infos =
deadlock_path.path;
const jsize deadlock_infos_len =
static_cast<jsize>(deadlock_info_buffer.size());
jobjectArray jdeadlock_infos = env->NewObjectArray(
deadlock_infos_len, rocksdb::DeadlockInfoJni::getJClass(env), nullptr);
if (jdeadlock_infos == nullptr) {
// exception thrown: OutOfMemoryError
env->DeleteLocalRef(jdeadlock_info_buffer);
return nullptr;
}
jsize jdeadlock_infos_offset = 0;
auto infos_end = deadlock_infos.end();
for (auto infos_it = deadlock_infos.begin(); infos_it != infos_end;
++infos_it) {
const rocksdb::DeadlockInfo deadlock_info = *infos_it;
const jobject jdeadlock_info = rocksdb::TransactionDBJni::newDeadlockInfo(
env, jobj, deadlock_info.m_txn_id, deadlock_info.m_cf_id,
deadlock_info.m_waiting_key, deadlock_info.m_exclusive);
if (jdeadlock_info == nullptr) {
// exception occcurred
env->DeleteLocalRef(jdeadlock_info_buffer);
return nullptr;
}
env->SetObjectArrayElement(jdeadlock_infos, jdeadlock_infos_offset++,
jdeadlock_info);
if (env->ExceptionCheck()) {
// exception thrown: ArrayIndexOutOfBoundsException or
// ArrayStoreException
env->DeleteLocalRef(jdeadlock_info);
env->DeleteLocalRef(jdeadlock_info_buffer);
return nullptr;
}
}
const jobject jdeadlock_path = rocksdb::DeadlockPathJni::construct(
env, jdeadlock_infos, deadlock_path.limit_exceeded);
if (jdeadlock_path == nullptr) {
// exception occcurred
env->DeleteLocalRef(jdeadlock_info_buffer);
return nullptr;
}
env->SetObjectArrayElement(jdeadlock_info_buffer,
jdeadlock_info_buffer_offset++, jdeadlock_path);
if (env->ExceptionCheck()) {
// exception thrown: ArrayIndexOutOfBoundsException or ArrayStoreException
env->DeleteLocalRef(jdeadlock_path);
env->DeleteLocalRef(jdeadlock_info_buffer);
return nullptr;
}
}
return jdeadlock_info_buffer;
}
/*
* Class: org_rocksdb_TransactionDB
* Method: setDeadlockInfoBufferSize
* Signature: (JI)V
*/
void Java_org_rocksdb_TransactionDB_setDeadlockInfoBufferSize(
JNIEnv* /*env*/, jobject /*jobj*/, jlong jhandle,
jint jdeadlock_info_buffer_size) {
auto* txn_db = reinterpret_cast<rocksdb::TransactionDB*>(jhandle);
txn_db->SetDeadlockInfoBufferSize(jdeadlock_info_buffer_size);
}
/*
* Class: org_rocksdb_TransactionDB
* Method: disposeInternal
* Signature: (J)V
*/
void Java_org_rocksdb_TransactionDB_disposeInternal(JNIEnv* /*env*/,
jobject /*jobj*/,
jlong jhandle) {
delete reinterpret_cast<rocksdb::TransactionDB*>(jhandle);
}