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rocksdb/java/rocksjni/write_batch.cc

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// 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::WriteBatch methods from Java side.
#include <memory>
#include "include/org_rocksdb_WriteBatch.h"
#include "include/org_rocksdb_WriteBatch_Handler.h"
#include "include/org_rocksdb_test_WriteBatchInternal.h"
#include "include/org_rocksdb_test_WriteBatchTest.h"
#include "rocksjni/portal.h"
#include "rocksjni/writebatchhandlerjnicallback.h"
#include "rocksdb/db.h"
#include "rocksdb/immutable_options.h"
#include "db/memtable.h"
#include "rocksdb/write_batch.h"
#include "rocksdb/status.h"
#include "db/write_batch_internal.h"
#include "rocksdb/env.h"
#include "rocksdb/memtablerep.h"
#include "util/logging.h"
#include "util/scoped_arena_iterator.h"
#include "util/testharness.h"
/*
* Class: org_rocksdb_WriteBatch
* Method: newWriteBatch
* Signature: (I)V
*/
void Java_org_rocksdb_WriteBatch_newWriteBatch(
JNIEnv* env, jobject jobj, jint jreserved_bytes) {
rocksdb::WriteBatch* wb = new rocksdb::WriteBatch(
static_cast<size_t>(jreserved_bytes));
rocksdb::WriteBatchJni::setHandle(env, jobj, wb);
}
/*
* Class: org_rocksdb_WriteBatch
* Method: count
* Signature: ()I
*/
jint Java_org_rocksdb_WriteBatch_count(JNIEnv* env, jobject jobj) {
rocksdb::WriteBatch* wb = rocksdb::WriteBatchJni::getHandle(env, jobj);
assert(wb != nullptr);
return static_cast<jint>(wb->Count());
}
/*
* Class: org_rocksdb_WriteBatch
* Method: clear
* Signature: ()V
*/
void Java_org_rocksdb_WriteBatch_clear(JNIEnv* env, jobject jobj) {
rocksdb::WriteBatch* wb = rocksdb::WriteBatchJni::getHandle(env, jobj);
assert(wb != nullptr);
wb->Clear();
}
/*
* Helper for WriteBatch put operations
*/
void write_batch_put_helper(
JNIEnv* env, jobject jobj,
jbyteArray jkey, jint jkey_len,
jbyteArray jentry_value, jint jentry_value_len,
rocksdb::ColumnFamilyHandle* cf_handle) {
rocksdb::WriteBatch* wb = rocksdb::WriteBatchJni::getHandle(env, jobj);
assert(wb != nullptr);
jbyte* key = env->GetByteArrayElements(jkey, nullptr);
jbyte* value = env->GetByteArrayElements(jentry_value, nullptr);
rocksdb::Slice key_slice(reinterpret_cast<char*>(key), jkey_len);
rocksdb::Slice value_slice(reinterpret_cast<char*>(value),
jentry_value_len);
if (cf_handle != nullptr) {
wb->Put(cf_handle, key_slice, value_slice);
} else {
// backwards compatibility
wb->Put(key_slice, value_slice);
}
env->ReleaseByteArrayElements(jkey, key, JNI_ABORT);
env->ReleaseByteArrayElements(jentry_value, value, JNI_ABORT);
}
/*
* Class: org_rocksdb_WriteBatch
* Method: put
* Signature: ([BI[BI)V
*/
void Java_org_rocksdb_WriteBatch_put___3BI_3BI(
JNIEnv* env, jobject jobj,
jbyteArray jkey, jint jkey_len,
jbyteArray jentry_value, jint jentry_value_len) {
write_batch_put_helper(env, jobj, jkey, jkey_len, jentry_value,
jentry_value_len, nullptr);
}
/*
* Class: org_rocksdb_WriteBatch
* Method: put
* Signature: ([BI[BIJ)V
*/
void Java_org_rocksdb_WriteBatch_put___3BI_3BIJ(
JNIEnv* env, jobject jobj,
jbyteArray jkey, jint jkey_len,
jbyteArray jentry_value, jint jentry_value_len, jlong jcf_handle) {
auto cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
write_batch_put_helper(env, jobj, jkey, jkey_len, jentry_value,
jentry_value_len, cf_handle);
}
/*
* Helper for write batch merge operations
*/
void write_batch_merge_helper(
JNIEnv* env, jobject jobj,
jbyteArray jkey, jint jkey_len,
jbyteArray jentry_value, jint jentry_value_len,
rocksdb::ColumnFamilyHandle* cf_handle) {
rocksdb::WriteBatch* wb = rocksdb::WriteBatchJni::getHandle(env, jobj);
assert(wb != nullptr);
jbyte* key = env->GetByteArrayElements(jkey, nullptr);
jbyte* value = env->GetByteArrayElements(jentry_value, nullptr);
rocksdb::Slice key_slice(reinterpret_cast<char*>(key), jkey_len);
rocksdb::Slice value_slice(reinterpret_cast<char*>(value),
jentry_value_len);
if (cf_handle != nullptr) {
wb->Merge(cf_handle, key_slice, value_slice);
} else {
// backwards compatibility
wb->Merge(key_slice, value_slice);
}
env->ReleaseByteArrayElements(jkey, key, JNI_ABORT);
env->ReleaseByteArrayElements(jentry_value, value, JNI_ABORT);
}
/*
* Class: org_rocksdb_WriteBatch
* Method: merge
* Signature: ([BI[BI)V
*/
void Java_org_rocksdb_WriteBatch_merge___3BI_3BI(
JNIEnv* env, jobject jobj,
jbyteArray jkey, jint jkey_len,
jbyteArray jentry_value, jint jentry_value_len) {
write_batch_merge_helper(env, jobj, jkey, jkey_len,
jentry_value, jentry_value_len, nullptr);
}
/*
* Class: org_rocksdb_WriteBatch
* Method: merge
* Signature: ([BI[BIJ)V
*/
void Java_org_rocksdb_WriteBatch_merge___3BI_3BIJ(
JNIEnv* env, jobject jobj,
jbyteArray jkey, jint jkey_len,
jbyteArray jentry_value, jint jentry_value_len, jlong jcf_handle) {
auto cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
write_batch_merge_helper(env, jobj, jkey, jkey_len,
jentry_value, jentry_value_len, cf_handle);
}
/*
* Helper for write batch remove operations
*/
void write_batch_remove_helper(
JNIEnv* env, jobject jobj,
jbyteArray jkey, jint jkey_len,
rocksdb::ColumnFamilyHandle* cf_handle) {
rocksdb::WriteBatch* wb = rocksdb::WriteBatchJni::getHandle(env, jobj);
assert(wb != nullptr);
jbyte* key = env->GetByteArrayElements(jkey, nullptr);
rocksdb::Slice key_slice(reinterpret_cast<char*>(key), jkey_len);
if (cf_handle != nullptr) {
wb->Delete(cf_handle, key_slice);
} else {
wb->Delete(key_slice);
}
env->ReleaseByteArrayElements(jkey, key, JNI_ABORT);
}
/*
* Class: org_rocksdb_WriteBatch
* Method: remove
* Signature: ([BI)V
*/
void Java_org_rocksdb_WriteBatch_remove___3BI(
JNIEnv* env, jobject jobj,
jbyteArray jkey, jint jkey_len) {
write_batch_remove_helper(env, jobj, jkey, jkey_len, nullptr);
}
/*
* Class: org_rocksdb_WriteBatch
* Method: remove
* Signature: ([BIJ)V
*/
void Java_org_rocksdb_WriteBatch_remove___3BIJ(
JNIEnv* env, jobject jobj,
jbyteArray jkey, jint jkey_len, jlong jcf_handle) {
auto cf_handle = reinterpret_cast<rocksdb::ColumnFamilyHandle*>(jcf_handle);
write_batch_remove_helper(env, jobj, jkey, jkey_len, cf_handle);
}
/*
* Class: org_rocksdb_WriteBatch
* Method: putLogData
* Signature: ([BI)V
*/
void Java_org_rocksdb_WriteBatch_putLogData(
JNIEnv* env, jobject jobj, jbyteArray jblob, jint jblob_len) {
rocksdb::WriteBatch* wb = rocksdb::WriteBatchJni::getHandle(env, jobj);
assert(wb != nullptr);
jbyte* blob = env->GetByteArrayElements(jblob, nullptr);
rocksdb::Slice blob_slice(reinterpret_cast<char*>(blob), jblob_len);
wb->PutLogData(blob_slice);
env->ReleaseByteArrayElements(jblob, blob, JNI_ABORT);
}
/*
* Class: org_rocksdb_WriteBatch
* Method: iterate
* Signature: (J)V
*/
void Java_org_rocksdb_WriteBatch_iterate(
JNIEnv* env , jobject jobj, jlong handlerHandle) {
rocksdb::WriteBatch* wb = rocksdb::WriteBatchJni::getHandle(env, jobj);
assert(wb != nullptr);
rocksdb::Status s = wb->Iterate(
reinterpret_cast<rocksdb::WriteBatchHandlerJniCallback*>(handlerHandle));
if (s.ok()) {
return;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
}
/*
* Class: org_rocksdb_WriteBatch
* Method: disposeInternal
* Signature: (J)V
*/
void Java_org_rocksdb_WriteBatch_disposeInternal(
JNIEnv* env, jobject jobj, jlong handle) {
delete reinterpret_cast<rocksdb::WriteBatch*>(handle);
}
/*
* Class: org_rocksdb_test_WriteBatchInternal
* Method: setSequence
* Signature: (Lorg/rocksdb/WriteBatch;J)V
*/
void Java_org_rocksdb_test_WriteBatchInternal_setSequence(
JNIEnv* env, jclass jclazz, jobject jobj, jlong jsn) {
rocksdb::WriteBatch* wb = rocksdb::WriteBatchJni::getHandle(env, jobj);
assert(wb != nullptr);
rocksdb::WriteBatchInternal::SetSequence(
wb, static_cast<rocksdb::SequenceNumber>(jsn));
}
/*
* Class: org_rocksdb_test_WriteBatchInternal
* Method: sequence
* Signature: (Lorg/rocksdb/WriteBatch;)J
*/
jlong Java_org_rocksdb_test_WriteBatchInternal_sequence(
JNIEnv* env, jclass jclazz, jobject jobj) {
rocksdb::WriteBatch* wb = rocksdb::WriteBatchJni::getHandle(env, jobj);
assert(wb != nullptr);
return static_cast<jlong>(rocksdb::WriteBatchInternal::Sequence(wb));
}
/*
* Class: org_rocksdb_test_WriteBatchInternal
* Method: append
* Signature: (Lorg/rocksdb/WriteBatch;Lorg/rocksdb/WriteBatch;)V
*/
void Java_org_rocksdb_test_WriteBatchInternal_append(
JNIEnv* env, jclass jclazz, jobject jwb1, jobject jwb2) {
rocksdb::WriteBatch* wb1 = rocksdb::WriteBatchJni::getHandle(env, jwb1);
assert(wb1 != nullptr);
rocksdb::WriteBatch* wb2 = rocksdb::WriteBatchJni::getHandle(env, jwb2);
assert(wb2 != nullptr);
rocksdb::WriteBatchInternal::Append(wb1, wb2);
}
/*
* Class: org_rocksdb_WriteBatch_Handler
* Method: createNewHandler0
* Signature: ()V
*/
void Java_org_rocksdb_WriteBatch_00024Handler_createNewHandler0(
JNIEnv* env, jobject jobj) {
const rocksdb::WriteBatchHandlerJniCallback* h =
new rocksdb::WriteBatchHandlerJniCallback(env, jobj);
rocksdb::WriteBatchHandlerJni::setHandle(env, jobj, h);
}
/*
* Class: org_rocksdb_WriteBatch_Handler
* Method: disposeInternal
* Signature: (J)V
*/
void Java_org_rocksdb_WriteBatch_00024Handler_disposeInternal(
JNIEnv* env, jobject jobj, jlong handle) {
delete reinterpret_cast<rocksdb::WriteBatchHandlerJniCallback*>(handle);
}
/*
* Class: org_rocksdb_test_WriteBatchTest
* Method: getContents
* Signature: (Lorg/rocksdb/WriteBatch;)[B
*/
jbyteArray Java_org_rocksdb_test_WriteBatchTest_getContents(
JNIEnv* env, jclass jclazz, jobject jobj) {
rocksdb::WriteBatch* b = rocksdb::WriteBatchJni::getHandle(env, jobj);
assert(b != nullptr);
// todo: Currently the following code is directly copied from
// db/write_bench_test.cc. It could be implemented in java once
// all the necessary components can be accessed via jni api.
rocksdb::InternalKeyComparator cmp(rocksdb::BytewiseComparator());
auto factory = std::make_shared<rocksdb::SkipListFactory>();
rocksdb::Options options;
options.memtable_factory = factory;
rocksdb::MemTable* mem = new rocksdb::MemTable(
cmp, rocksdb::ImmutableCFOptions(options),
rocksdb::MutableCFOptions(options,
rocksdb::ImmutableCFOptions(options)));
mem->Ref();
std::string state;
rocksdb::ColumnFamilyMemTablesDefault cf_mems_default(mem);
rocksdb::Status s =
rocksdb::WriteBatchInternal::InsertInto(b, &cf_mems_default);
int count = 0;
rocksdb::Arena arena;
rocksdb::ScopedArenaIterator iter(mem->NewIterator(
rocksdb::ReadOptions(), &arena));
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
rocksdb::ParsedInternalKey ikey;
memset(reinterpret_cast<void*>(&ikey), 0, sizeof(ikey));
ASSERT_TRUE(rocksdb::ParseInternalKey(iter->key(), &ikey));
switch (ikey.type) {
case rocksdb::kTypeValue:
state.append("Put(");
state.append(ikey.user_key.ToString());
state.append(", ");
state.append(iter->value().ToString());
state.append(")");
count++;
break;
case rocksdb::kTypeMerge:
state.append("Merge(");
state.append(ikey.user_key.ToString());
state.append(", ");
state.append(iter->value().ToString());
state.append(")");
count++;
break;
case rocksdb::kTypeDeletion:
state.append("Delete(");
state.append(ikey.user_key.ToString());
state.append(")");
count++;
break;
default:
assert(false);
break;
}
state.append("@");
state.append(rocksdb::NumberToString(ikey.sequence));
}
if (!s.ok()) {
state.append(s.ToString());
} else if (count != rocksdb::WriteBatchInternal::Count(b)) {
state.append("CountMismatch()");
}
delete mem->Unref();
jbyteArray jstate = env->NewByteArray(static_cast<jsize>(state.size()));
env->SetByteArrayRegion(jstate, 0, static_cast<jsize>(state.size()),
reinterpret_cast<const jbyte*>(state.c_str()));
return jstate;
}