rocksdb/java/rocksjni/write_batch_with_index.cc
Adam Retter 7242dae7fe Improve RocksJava Comparator (#6252)
Summary:
This is a redesign of the API for RocksJava comparators with the aim of improving performance. It also simplifies the class hierarchy.

**NOTE**: This breaks backwards compatibility for existing 3rd party Comparators implemented in Java... so we need to consider carefully which release branches this goes into.

Previously when implementing a comparator in Java the developer had a choice of subclassing either `DirectComparator` or `Comparator` which would use direct and non-direct byte-buffers resepectively (via `DirectSlice` and `Slice`).

In this redesign there we have eliminated the overhead of using the Java Slice classes, and just use `ByteBuffer`s. The `ComparatorOptions` supplied when constructing a Comparator allow you to choose between direct and non-direct byte buffers by setting `useDirect`.

In addition, the `ComparatorOptions` now allow you to choose whether a ByteBuffer is reused over multiple comparator calls, by setting `maxReusedBufferSize > 0`. When buffers are reused, ComparatorOptions provides a choice of mutex type by setting `useAdaptiveMutex`.

 ---
[JMH benchmarks previously indicated](https://github.com/facebook/rocksdb/pull/6241#issue-356398306) that the difference between C++ and Java for implementing a comparator was ~7x slowdown in Java.

With these changes, when reusing buffers and guarding access to them via mutexes the slowdown is approximately the same. However, these changes offer a new facility to not reuse mutextes, which reduces the slowdown to ~5.5x in Java. We also offer a `thread_local` mechanism for reusing buffers, which reduces slowdown to ~5.2x in Java (closes https://github.com/facebook/rocksdb/pull/4425).

These changes also form a good base for further optimisation work such as further JNI lookup caching, and JNI critical.

 ---
These numbers were captured without jemalloc. With jemalloc, the performance improves for all tests, and the Java slowdown reduces to between 4.8x and 5.x.

```
ComparatorBenchmarks.put                                                native_bytewise  thrpt   25  124483.795 ± 2032.443  ops/s
ComparatorBenchmarks.put                                        native_reverse_bytewise  thrpt   25  114414.536 ± 3486.156  ops/s
ComparatorBenchmarks.put              java_bytewise_non-direct_reused-64_adaptive-mutex  thrpt   25   17228.250 ± 1288.546  ops/s
ComparatorBenchmarks.put          java_bytewise_non-direct_reused-64_non-adaptive-mutex  thrpt   25   16035.865 ± 1248.099  ops/s
ComparatorBenchmarks.put                java_bytewise_non-direct_reused-64_thread-local  thrpt   25   21571.500 ±  871.521  ops/s
ComparatorBenchmarks.put                  java_bytewise_direct_reused-64_adaptive-mutex  thrpt   25   23613.773 ± 8465.660  ops/s
ComparatorBenchmarks.put              java_bytewise_direct_reused-64_non-adaptive-mutex  thrpt   25   16768.172 ± 5618.489  ops/s
ComparatorBenchmarks.put                    java_bytewise_direct_reused-64_thread-local  thrpt   25   23921.164 ± 8734.742  ops/s
ComparatorBenchmarks.put                              java_bytewise_non-direct_no-reuse  thrpt   25   17899.684 ±  839.679  ops/s
ComparatorBenchmarks.put                                  java_bytewise_direct_no-reuse  thrpt   25   22148.316 ± 1215.527  ops/s
ComparatorBenchmarks.put      java_reverse_bytewise_non-direct_reused-64_adaptive-mutex  thrpt   25   11311.126 ±  820.602  ops/s
ComparatorBenchmarks.put  java_reverse_bytewise_non-direct_reused-64_non-adaptive-mutex  thrpt   25   11421.311 ±  807.210  ops/s
ComparatorBenchmarks.put        java_reverse_bytewise_non-direct_reused-64_thread-local  thrpt   25   11554.005 ±  960.556  ops/s
ComparatorBenchmarks.put          java_reverse_bytewise_direct_reused-64_adaptive-mutex  thrpt   25   22960.523 ± 1673.421  ops/s
ComparatorBenchmarks.put      java_reverse_bytewise_direct_reused-64_non-adaptive-mutex  thrpt   25   18293.317 ± 1434.601  ops/s
ComparatorBenchmarks.put            java_reverse_bytewise_direct_reused-64_thread-local  thrpt   25   24479.361 ± 2157.306  ops/s
ComparatorBenchmarks.put                      java_reverse_bytewise_non-direct_no-reuse  thrpt   25    7942.286 ±  626.170  ops/s
ComparatorBenchmarks.put                          java_reverse_bytewise_direct_no-reuse  thrpt   25   11781.955 ± 1019.843  ops/s
```
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6252

Differential Revision: D19331064

Pulled By: pdillinger

fbshipit-source-id: 1f3b794e6a14162b2c3ffb943e8c0e64a0c03738
2020-02-03 12:30:13 -08:00

740 lines
26 KiB
C++

// 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::WriteBatchWithIndex methods from Java side.
#include "rocksdb/utilities/write_batch_with_index.h"
#include "include/org_rocksdb_WBWIRocksIterator.h"
#include "include/org_rocksdb_WriteBatchWithIndex.h"
#include "rocksdb/comparator.h"
#include "rocksjni/portal.h"
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: newWriteBatchWithIndex
* Signature: ()J
*/
jlong Java_org_rocksdb_WriteBatchWithIndex_newWriteBatchWithIndex__(
JNIEnv* /*env*/, jclass /*jcls*/) {
auto* wbwi = new rocksdb::WriteBatchWithIndex();
return reinterpret_cast<jlong>(wbwi);
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: newWriteBatchWithIndex
* Signature: (Z)J
*/
jlong Java_org_rocksdb_WriteBatchWithIndex_newWriteBatchWithIndex__Z(
JNIEnv* /*env*/, jclass /*jcls*/, jboolean joverwrite_key) {
auto* wbwi = new rocksdb::WriteBatchWithIndex(
rocksdb::BytewiseComparator(), 0, static_cast<bool>(joverwrite_key));
return reinterpret_cast<jlong>(wbwi);
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: newWriteBatchWithIndex
* Signature: (JBIZ)J
*/
jlong Java_org_rocksdb_WriteBatchWithIndex_newWriteBatchWithIndex__JBIZ(
JNIEnv* /*env*/, jclass /*jcls*/, jlong jfallback_index_comparator_handle,
jbyte jcomparator_type, jint jreserved_bytes, jboolean joverwrite_key) {
rocksdb::Comparator* fallback_comparator = nullptr;
switch (jcomparator_type) {
// JAVA_COMPARATOR
case 0x0:
fallback_comparator = reinterpret_cast<rocksdb::ComparatorJniCallback*>(
jfallback_index_comparator_handle);
break;
// JAVA_NATIVE_COMPARATOR_WRAPPER
case 0x1:
fallback_comparator = reinterpret_cast<rocksdb::Comparator*>(
jfallback_index_comparator_handle);
break;
}
auto* wbwi = new rocksdb::WriteBatchWithIndex(
fallback_comparator, static_cast<size_t>(jreserved_bytes),
static_cast<bool>(joverwrite_key));
return reinterpret_cast<jlong>(wbwi);
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: count0
* Signature: (J)I
*/
jint Java_org_rocksdb_WriteBatchWithIndex_count0(JNIEnv* /*env*/,
jobject /*jobj*/,
jlong jwbwi_handle) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
assert(wbwi != nullptr);
return static_cast<jint>(wbwi->GetWriteBatch()->Count());
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: put
* Signature: (J[BI[BI)V
*/
void Java_org_rocksdb_WriteBatchWithIndex_put__J_3BI_3BI(
JNIEnv* env, jobject jobj, jlong jwbwi_handle, jbyteArray jkey,
jint jkey_len, jbyteArray jentry_value, jint jentry_value_len) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
assert(wbwi != nullptr);
auto put = [&wbwi](rocksdb::Slice key, rocksdb::Slice value) {
return wbwi->Put(key, value);
};
std::unique_ptr<rocksdb::Status> status = rocksdb::JniUtil::kv_op(
put, env, jobj, jkey, jkey_len, jentry_value, jentry_value_len);
if (status != nullptr && !status->ok()) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, status);
}
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: put
* Signature: (J[BI[BIJ)V
*/
void Java_org_rocksdb_WriteBatchWithIndex_put__J_3BI_3BIJ(
JNIEnv* env, jobject jobj, jlong jwbwi_handle, jbyteArray jkey,
jint jkey_len, jbyteArray jentry_value, jint jentry_value_len,
jlong jcf_handle) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
assert(wbwi != nullptr);
auto* cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
assert(cf_handle != nullptr);
auto put = [&wbwi, &cf_handle](rocksdb::Slice key, rocksdb::Slice value) {
return wbwi->Put(cf_handle, key, value);
};
std::unique_ptr<rocksdb::Status> status = rocksdb::JniUtil::kv_op(
put, env, jobj, jkey, jkey_len, jentry_value, jentry_value_len);
if (status != nullptr && !status->ok()) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, status);
}
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: merge
* Signature: (J[BI[BI)V
*/
void Java_org_rocksdb_WriteBatchWithIndex_merge__J_3BI_3BI(
JNIEnv* env, jobject jobj, jlong jwbwi_handle, jbyteArray jkey,
jint jkey_len, jbyteArray jentry_value, jint jentry_value_len) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
assert(wbwi != nullptr);
auto merge = [&wbwi](rocksdb::Slice key, rocksdb::Slice value) {
return wbwi->Merge(key, value);
};
std::unique_ptr<rocksdb::Status> status = rocksdb::JniUtil::kv_op(
merge, env, jobj, jkey, jkey_len, jentry_value, jentry_value_len);
if (status != nullptr && !status->ok()) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, status);
}
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: merge
* Signature: (J[BI[BIJ)V
*/
void Java_org_rocksdb_WriteBatchWithIndex_merge__J_3BI_3BIJ(
JNIEnv* env, jobject jobj, jlong jwbwi_handle, jbyteArray jkey,
jint jkey_len, jbyteArray jentry_value, jint jentry_value_len,
jlong jcf_handle) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
assert(wbwi != nullptr);
auto* cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
assert(cf_handle != nullptr);
auto merge = [&wbwi, &cf_handle](rocksdb::Slice key, rocksdb::Slice value) {
return wbwi->Merge(cf_handle, key, value);
};
std::unique_ptr<rocksdb::Status> status = rocksdb::JniUtil::kv_op(
merge, env, jobj, jkey, jkey_len, jentry_value, jentry_value_len);
if (status != nullptr && !status->ok()) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, status);
}
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: delete
* Signature: (J[BI)V
*/
void Java_org_rocksdb_WriteBatchWithIndex_delete__J_3BI(JNIEnv* env,
jobject jobj,
jlong jwbwi_handle,
jbyteArray jkey,
jint jkey_len) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
assert(wbwi != nullptr);
auto remove = [&wbwi](rocksdb::Slice key) { return wbwi->Delete(key); };
std::unique_ptr<rocksdb::Status> status =
rocksdb::JniUtil::k_op(remove, env, jobj, jkey, jkey_len);
if (status != nullptr && !status->ok()) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, status);
}
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: delete
* Signature: (J[BIJ)V
*/
void Java_org_rocksdb_WriteBatchWithIndex_delete__J_3BIJ(
JNIEnv* env, jobject jobj, jlong jwbwi_handle, jbyteArray jkey,
jint jkey_len, jlong jcf_handle) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
assert(wbwi != nullptr);
auto* cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
assert(cf_handle != nullptr);
auto remove = [&wbwi, &cf_handle](rocksdb::Slice key) {
return wbwi->Delete(cf_handle, key);
};
std::unique_ptr<rocksdb::Status> status =
rocksdb::JniUtil::k_op(remove, env, jobj, jkey, jkey_len);
if (status != nullptr && !status->ok()) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, status);
}
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: singleDelete
* Signature: (J[BI)V
*/
void Java_org_rocksdb_WriteBatchWithIndex_singleDelete__J_3BI(
JNIEnv* env, jobject jobj, jlong jwbwi_handle, jbyteArray jkey,
jint jkey_len) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
assert(wbwi != nullptr);
auto single_delete = [&wbwi](rocksdb::Slice key) {
return wbwi->SingleDelete(key);
};
std::unique_ptr<rocksdb::Status> status =
rocksdb::JniUtil::k_op(single_delete, env, jobj, jkey, jkey_len);
if (status != nullptr && !status->ok()) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, status);
}
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: singleDelete
* Signature: (J[BIJ)V
*/
void Java_org_rocksdb_WriteBatchWithIndex_singleDelete__J_3BIJ(
JNIEnv* env, jobject jobj, jlong jwbwi_handle, jbyteArray jkey,
jint jkey_len, jlong jcf_handle) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
assert(wbwi != nullptr);
auto* cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
assert(cf_handle != nullptr);
auto single_delete = [&wbwi, &cf_handle](rocksdb::Slice key) {
return wbwi->SingleDelete(cf_handle, key);
};
std::unique_ptr<rocksdb::Status> status =
rocksdb::JniUtil::k_op(single_delete, env, jobj, jkey, jkey_len);
if (status != nullptr && !status->ok()) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, status);
}
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: deleteRange
* Signature: (J[BI[BI)V
*/
void Java_org_rocksdb_WriteBatchWithIndex_deleteRange__J_3BI_3BI(
JNIEnv* env, jobject jobj, jlong jwbwi_handle, jbyteArray jbegin_key,
jint jbegin_key_len, jbyteArray jend_key, jint jend_key_len) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
assert(wbwi != nullptr);
auto deleteRange = [&wbwi](rocksdb::Slice beginKey, rocksdb::Slice endKey) {
return wbwi->DeleteRange(beginKey, endKey);
};
std::unique_ptr<rocksdb::Status> status =
rocksdb::JniUtil::kv_op(deleteRange, env, jobj, jbegin_key,
jbegin_key_len, jend_key, jend_key_len);
if (status != nullptr && !status->ok()) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, status);
}
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: deleteRange
* Signature: (J[BI[BIJ)V
*/
void Java_org_rocksdb_WriteBatchWithIndex_deleteRange__J_3BI_3BIJ(
JNIEnv* env, jobject jobj, jlong jwbwi_handle, jbyteArray jbegin_key,
jint jbegin_key_len, jbyteArray jend_key, jint jend_key_len,
jlong jcf_handle) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
assert(wbwi != nullptr);
auto* cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
assert(cf_handle != nullptr);
auto deleteRange = [&wbwi, &cf_handle](rocksdb::Slice beginKey,
rocksdb::Slice endKey) {
return wbwi->DeleteRange(cf_handle, beginKey, endKey);
};
std::unique_ptr<rocksdb::Status> status =
rocksdb::JniUtil::kv_op(deleteRange, env, jobj, jbegin_key,
jbegin_key_len, jend_key, jend_key_len);
if (status != nullptr && !status->ok()) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, status);
}
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: putLogData
* Signature: (J[BI)V
*/
void Java_org_rocksdb_WriteBatchWithIndex_putLogData(JNIEnv* env, jobject jobj,
jlong jwbwi_handle,
jbyteArray jblob,
jint jblob_len) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
assert(wbwi != nullptr);
auto putLogData = [&wbwi](rocksdb::Slice blob) {
return wbwi->PutLogData(blob);
};
std::unique_ptr<rocksdb::Status> status =
rocksdb::JniUtil::k_op(putLogData, env, jobj, jblob, jblob_len);
if (status != nullptr && !status->ok()) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, status);
}
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: clear
* Signature: (J)V
*/
void Java_org_rocksdb_WriteBatchWithIndex_clear0(JNIEnv* /*env*/,
jobject /*jobj*/,
jlong jwbwi_handle) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
assert(wbwi != nullptr);
wbwi->Clear();
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: setSavePoint0
* Signature: (J)V
*/
void Java_org_rocksdb_WriteBatchWithIndex_setSavePoint0(JNIEnv* /*env*/,
jobject /*jobj*/,
jlong jwbwi_handle) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
assert(wbwi != nullptr);
wbwi->SetSavePoint();
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: rollbackToSavePoint0
* Signature: (J)V
*/
void Java_org_rocksdb_WriteBatchWithIndex_rollbackToSavePoint0(
JNIEnv* env, jobject /*jobj*/, jlong jwbwi_handle) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
assert(wbwi != nullptr);
auto s = wbwi->RollbackToSavePoint();
if (s.ok()) {
return;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: popSavePoint
* Signature: (J)V
*/
void Java_org_rocksdb_WriteBatchWithIndex_popSavePoint(JNIEnv* env,
jobject /*jobj*/,
jlong jwbwi_handle) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
assert(wbwi != nullptr);
auto s = wbwi->PopSavePoint();
if (s.ok()) {
return;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: setMaxBytes
* Signature: (JJ)V
*/
void Java_org_rocksdb_WriteBatchWithIndex_setMaxBytes(JNIEnv* /*env*/,
jobject /*jobj*/,
jlong jwbwi_handle,
jlong jmax_bytes) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
assert(wbwi != nullptr);
wbwi->SetMaxBytes(static_cast<size_t>(jmax_bytes));
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: getWriteBatch
* Signature: (J)Lorg/rocksdb/WriteBatch;
*/
jobject Java_org_rocksdb_WriteBatchWithIndex_getWriteBatch(JNIEnv* env,
jobject /*jobj*/,
jlong jwbwi_handle) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
assert(wbwi != nullptr);
auto* wb = wbwi->GetWriteBatch();
// TODO(AR) is the `wb` object owned by us?
return rocksdb::WriteBatchJni::construct(env, wb);
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: iterator0
* Signature: (J)J
*/
jlong Java_org_rocksdb_WriteBatchWithIndex_iterator0(JNIEnv* /*env*/,
jobject /*jobj*/,
jlong jwbwi_handle) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
auto* wbwi_iterator = wbwi->NewIterator();
return reinterpret_cast<jlong>(wbwi_iterator);
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: iterator1
* Signature: (JJ)J
*/
jlong Java_org_rocksdb_WriteBatchWithIndex_iterator1(JNIEnv* /*env*/,
jobject /*jobj*/,
jlong jwbwi_handle,
jlong jcf_handle) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
auto* cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
auto* wbwi_iterator = wbwi->NewIterator(cf_handle);
return reinterpret_cast<jlong>(wbwi_iterator);
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: iteratorWithBase
* Signature: (JJJ)J
*/
jlong Java_org_rocksdb_WriteBatchWithIndex_iteratorWithBase(JNIEnv* /*env*/,
jobject /*jobj*/,
jlong jwbwi_handle,
jlong jcf_handle,
jlong jbi_handle) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
auto* cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
auto* base_iterator = reinterpret_cast<rocksdb::Iterator*>(jbi_handle);
auto* iterator = wbwi->NewIteratorWithBase(cf_handle, base_iterator);
return reinterpret_cast<jlong>(iterator);
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: getFromBatch
* Signature: (JJ[BI)[B
*/
jbyteArray JNICALL Java_org_rocksdb_WriteBatchWithIndex_getFromBatch__JJ_3BI(
JNIEnv* env, jobject /*jobj*/, jlong jwbwi_handle, jlong jdbopt_handle,
jbyteArray jkey, jint jkey_len) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
auto* dbopt = reinterpret_cast<rocksdb::DBOptions*>(jdbopt_handle);
auto getter = [&wbwi, &dbopt](const rocksdb::Slice& key, std::string* value) {
return wbwi->GetFromBatch(*dbopt, key, value);
};
return rocksdb::JniUtil::v_op(getter, env, jkey, jkey_len);
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: getFromBatch
* Signature: (JJ[BIJ)[B
*/
jbyteArray Java_org_rocksdb_WriteBatchWithIndex_getFromBatch__JJ_3BIJ(
JNIEnv* env, jobject /*jobj*/, jlong jwbwi_handle, jlong jdbopt_handle,
jbyteArray jkey, jint jkey_len, jlong jcf_handle) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
auto* dbopt = reinterpret_cast<rocksdb::DBOptions*>(jdbopt_handle);
auto* cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
auto getter = [&wbwi, &cf_handle, &dbopt](const rocksdb::Slice& key,
std::string* value) {
return wbwi->GetFromBatch(cf_handle, *dbopt, key, value);
};
return rocksdb::JniUtil::v_op(getter, env, jkey, jkey_len);
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: getFromBatchAndDB
* Signature: (JJJ[BI)[B
*/
jbyteArray Java_org_rocksdb_WriteBatchWithIndex_getFromBatchAndDB__JJJ_3BI(
JNIEnv* env, jobject /*jobj*/, jlong jwbwi_handle, jlong jdb_handle,
jlong jreadopt_handle, jbyteArray jkey, jint jkey_len) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
auto* db = reinterpret_cast<rocksdb::DB*>(jdb_handle);
auto* readopt = reinterpret_cast<rocksdb::ReadOptions*>(jreadopt_handle);
auto getter = [&wbwi, &db, &readopt](const rocksdb::Slice& key,
std::string* value) {
return wbwi->GetFromBatchAndDB(db, *readopt, key, value);
};
return rocksdb::JniUtil::v_op(getter, env, jkey, jkey_len);
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: getFromBatchAndDB
* Signature: (JJJ[BIJ)[B
*/
jbyteArray Java_org_rocksdb_WriteBatchWithIndex_getFromBatchAndDB__JJJ_3BIJ(
JNIEnv* env, jobject /*jobj*/, jlong jwbwi_handle, jlong jdb_handle,
jlong jreadopt_handle, jbyteArray jkey, jint jkey_len, jlong jcf_handle) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(jwbwi_handle);
auto* db = reinterpret_cast<rocksdb::DB*>(jdb_handle);
auto* readopt = reinterpret_cast<rocksdb::ReadOptions*>(jreadopt_handle);
auto* cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
auto getter = [&wbwi, &db, &cf_handle, &readopt](const rocksdb::Slice& key,
std::string* value) {
return wbwi->GetFromBatchAndDB(db, *readopt, cf_handle, key, value);
};
return rocksdb::JniUtil::v_op(getter, env, jkey, jkey_len);
}
/*
* Class: org_rocksdb_WriteBatchWithIndex
* Method: disposeInternal
* Signature: (J)V
*/
void Java_org_rocksdb_WriteBatchWithIndex_disposeInternal(JNIEnv* /*env*/,
jobject /*jobj*/,
jlong handle) {
auto* wbwi = reinterpret_cast<rocksdb::WriteBatchWithIndex*>(handle);
assert(wbwi != nullptr);
delete wbwi;
}
/* WBWIRocksIterator below */
/*
* Class: org_rocksdb_WBWIRocksIterator
* Method: disposeInternal
* Signature: (J)V
*/
void Java_org_rocksdb_WBWIRocksIterator_disposeInternal(JNIEnv* /*env*/,
jobject /*jobj*/,
jlong handle) {
auto* it = reinterpret_cast<rocksdb::WBWIIterator*>(handle);
assert(it != nullptr);
delete it;
}
/*
* Class: org_rocksdb_WBWIRocksIterator
* Method: isValid0
* Signature: (J)Z
*/
jboolean Java_org_rocksdb_WBWIRocksIterator_isValid0(JNIEnv* /*env*/,
jobject /*jobj*/,
jlong handle) {
return reinterpret_cast<rocksdb::WBWIIterator*>(handle)->Valid();
}
/*
* Class: org_rocksdb_WBWIRocksIterator
* Method: seekToFirst0
* Signature: (J)V
*/
void Java_org_rocksdb_WBWIRocksIterator_seekToFirst0(JNIEnv* /*env*/,
jobject /*jobj*/,
jlong handle) {
reinterpret_cast<rocksdb::WBWIIterator*>(handle)->SeekToFirst();
}
/*
* Class: org_rocksdb_WBWIRocksIterator
* Method: seekToLast0
* Signature: (J)V
*/
void Java_org_rocksdb_WBWIRocksIterator_seekToLast0(JNIEnv* /*env*/,
jobject /*jobj*/,
jlong handle) {
reinterpret_cast<rocksdb::WBWIIterator*>(handle)->SeekToLast();
}
/*
* Class: org_rocksdb_WBWIRocksIterator
* Method: next0
* Signature: (J)V
*/
void Java_org_rocksdb_WBWIRocksIterator_next0(JNIEnv* /*env*/, jobject /*jobj*/,
jlong handle) {
reinterpret_cast<rocksdb::WBWIIterator*>(handle)->Next();
}
/*
* Class: org_rocksdb_WBWIRocksIterator
* Method: prev0
* Signature: (J)V
*/
void Java_org_rocksdb_WBWIRocksIterator_prev0(JNIEnv* /*env*/, jobject /*jobj*/,
jlong handle) {
reinterpret_cast<rocksdb::WBWIIterator*>(handle)->Prev();
}
/*
* Class: org_rocksdb_WBWIRocksIterator
* Method: seek0
* Signature: (J[BI)V
*/
void Java_org_rocksdb_WBWIRocksIterator_seek0(JNIEnv* env, jobject /*jobj*/,
jlong handle, jbyteArray jtarget,
jint jtarget_len) {
auto* it = reinterpret_cast<rocksdb::WBWIIterator*>(handle);
jbyte* target = env->GetByteArrayElements(jtarget, nullptr);
if (target == nullptr) {
// exception thrown: OutOfMemoryError
return;
}
rocksdb::Slice target_slice(reinterpret_cast<char*>(target), jtarget_len);
it->Seek(target_slice);
env->ReleaseByteArrayElements(jtarget, target, JNI_ABORT);
}
/*
* Class: org_rocksdb_WBWIRocksIterator
* Method: seekForPrev0
* Signature: (J[BI)V
*/
void Java_org_rocksdb_WBWIRocksIterator_seekForPrev0(JNIEnv* env,
jobject /*jobj*/,
jlong handle,
jbyteArray jtarget,
jint jtarget_len) {
auto* it = reinterpret_cast<rocksdb::WBWIIterator*>(handle);
jbyte* target = env->GetByteArrayElements(jtarget, nullptr);
if (target == nullptr) {
// exception thrown: OutOfMemoryError
return;
}
rocksdb::Slice target_slice(reinterpret_cast<char*>(target), jtarget_len);
it->SeekForPrev(target_slice);
env->ReleaseByteArrayElements(jtarget, target, JNI_ABORT);
}
/*
* Class: org_rocksdb_WBWIRocksIterator
* Method: status0
* Signature: (J)V
*/
void Java_org_rocksdb_WBWIRocksIterator_status0(JNIEnv* env, jobject /*jobj*/,
jlong handle) {
auto* it = reinterpret_cast<rocksdb::WBWIIterator*>(handle);
rocksdb::Status s = it->status();
if (s.ok()) {
return;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
}
/*
* Class: org_rocksdb_WBWIRocksIterator
* Method: entry1
* Signature: (J)[J
*/
jlongArray Java_org_rocksdb_WBWIRocksIterator_entry1(JNIEnv* env,
jobject /*jobj*/,
jlong handle) {
auto* it = reinterpret_cast<rocksdb::WBWIIterator*>(handle);
const rocksdb::WriteEntry& we = it->Entry();
jlong results[3];
// set the type of the write entry
results[0] = rocksdb::WriteTypeJni::toJavaWriteType(we.type);
// NOTE: key_slice and value_slice will be freed by
// org.rocksdb.DirectSlice#close
auto* key_slice = new rocksdb::Slice(we.key.data(), we.key.size());
results[1] = reinterpret_cast<jlong>(key_slice);
if (we.type == rocksdb::kDeleteRecord ||
we.type == rocksdb::kSingleDeleteRecord ||
we.type == rocksdb::kLogDataRecord) {
// set native handle of value slice to null if no value available
results[2] = 0;
} else {
auto* value_slice = new rocksdb::Slice(we.value.data(), we.value.size());
results[2] = reinterpret_cast<jlong>(value_slice);
}
jlongArray jresults = env->NewLongArray(3);
if (jresults == nullptr) {
// exception thrown: OutOfMemoryError
if (results[2] != 0) {
auto* value_slice = reinterpret_cast<rocksdb::Slice*>(results[2]);
delete value_slice;
}
delete key_slice;
return nullptr;
}
env->SetLongArrayRegion(jresults, 0, 3, results);
if (env->ExceptionCheck()) {
// exception thrown: ArrayIndexOutOfBoundsException
env->DeleteLocalRef(jresults);
if (results[2] != 0) {
auto* value_slice = reinterpret_cast<rocksdb::Slice*>(results[2]);
delete value_slice;
}
delete key_slice;
return nullptr;
}
return jresults;
}