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java / jni io_uring support (#9224)

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Summary:
Existing multiGet() in java calls multi_get_helper() which then calls DB::std::vector MultiGet(). This doesn't take advantage of io_uring.

This change adds another JNI level method that runs a parallel code path using the DB::void MultiGet(), using ByteBuffers at the JNI level. We call it multiGetDirect(). In addition to using the io_uring path, this code internally returns pinned slices which we can copy out of into our direct byte buffers; this should reduce the overall number of copies in the code path to/from Java. Some jmh benchmark runs (100k keys, 1000 key multiGet) suggest that for value sizes > 1k, we see about a 20% performance improvement, although performance is slightly reduced for small value sizes, there's a little bit more overhead in the JNI methods.

Closes https://github.com/facebook/rocksdb/issues/8407

Pull Request resolved: https://github.com/facebook/rocksdb/pull/9224

Reviewed By: mrambacher

Differential Revision: D32951754

Pulled By: jay-zhuang

fbshipit-source-id: 1f70df7334be2b6c42a9c8f92725f67c71631690
This commit is contained in:
Alan Paxton 2021-12-15 18:07:37 -08:00 committed by Facebook GitHub Bot
parent 7ac3a5d406
commit c1ec0b28eb
10 changed files with 1086 additions and 73 deletions
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1
java/CMakeLists.txt
View File

@ -112,6 +112,7 @@ set(JAVA_MAIN_CLASSES
src/main/java/org/rocksdb/BlockBasedTableConfig.java
src/main/java/org/rocksdb/BloomFilter.java
src/main/java/org/rocksdb/BuiltinComparator.java
src/main/java/org/rocksdb/ByteBufferGetStatus.java
src/main/java/org/rocksdb/Cache.java
src/main/java/org/rocksdb/CassandraCompactionFilter.java
src/main/java/org/rocksdb/CassandraValueMergeOperator.java

6
java/jmh/README.md
View File

@ -6,6 +6,12 @@ These are micro-benchmarks for RocksJava functionality, using [JMH (Java Microbe
**Note**: This uses a specific build of RocksDB that is set in the `<version>` element of the `dependencies` section of the `pom.xml` file. If you are testing local changes you should build and install a SNAPSHOT version of rocksdbjni, and update the `pom.xml` of rocksdbjni-jmh file to test with this.
For instance, this is how to install the OSX jar you just built for 6.26.0
```bash
$ mvn install:install-file -Dfile=./java/target/rocksdbjni-6.26.0-SNAPSHOT-osx.jar -DgroupId=org.rocksdb -DartifactId=rocksdbjni -Dversion=6.26.0-SNAPSHOT -Dpackaging=jar
```
```bash
$ mvn package
```

2
java/jmh/pom.xml
View File

@ -50,7 +50,7 @@
<dependency>
<groupId>org.rocksdb</groupId>
<artifactId>rocksdbjni</artifactId>
<version>6.6.0-SNAPSHOT</version>
<version>6.27.0-SNAPSHOT</version>
</dependency>
<dependency>

110
java/jmh/src/main/java/org/rocksdb/jmh/MultiGetBenchmarks.java
View File

@ -6,23 +6,26 @@
*/
package org.rocksdb.jmh;
import org.openjdk.jmh.annotations.*;
import org.rocksdb.*;
import org.rocksdb.util.FileUtils;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import static org.rocksdb.util.KVUtils.ba;
import static org.rocksdb.util.KVUtils.keys;
@State(Scope.Benchmark)
public class MultiGetBenchmarks {
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import org.openjdk.jmh.annotations.*;
import org.openjdk.jmh.runner.Runner;
import org.openjdk.jmh.runner.RunnerException;
import org.openjdk.jmh.runner.options.OptionsBuilder;
import org.rocksdb.*;
import org.rocksdb.util.FileUtils;
@State(Scope.Thread)
public class MultiGetBenchmarks {
@Param({
"no_column_family",
"1_column_family",
@ -31,8 +34,7 @@ public class MultiGetBenchmarks {
})
String columnFamilyTestType;
@Param("100000")
int keyCount;
@Param({"10000", "25000", "100000"}) int keyCount;
@Param({
"10",
@ -42,6 +44,9 @@ public class MultiGetBenchmarks {
})
int multiGetSize;
@Param({"16", "64", "250", "1000", "4000", "16000"}) int valueSize;
@Param({"16"}) int keySize; // big enough
Path dbDir;
DBOptions options;
int cfs = 0; // number of column families
@ -85,7 +90,8 @@ public class MultiGetBenchmarks {
// store initial data for retrieving via get
for (int i = 0; i < cfs; i++) {
for (int j = 0; j < keyCount; j++) {
db.put(cfHandles[i], ba("key" + j), ba("value" + j));
final byte[] paddedValue = Arrays.copyOf(ba("value" + j), valueSize);
db.put(cfHandles[i], ba("key" + j), paddedValue);
}
}
@ -149,10 +155,78 @@ public class MultiGetBenchmarks {
}
}
ByteBuffer keysBuffer;
ByteBuffer valuesBuffer;
List<ByteBuffer> valueBuffersList;
List<ByteBuffer> keyBuffersList;
@Setup
public void allocateSliceBuffers() {
keysBuffer = ByteBuffer.allocateDirect(keyCount * valueSize);
valuesBuffer = ByteBuffer.allocateDirect(keyCount * valueSize);
valueBuffersList = new ArrayList<>();
keyBuffersList = new ArrayList<>();
for (int i = 0; i < keyCount; i++) {
valueBuffersList.add(valuesBuffer.slice());
valuesBuffer.position(i * valueSize);
keyBuffersList.add(keysBuffer.slice());
keysBuffer.position(i * keySize);
}
}
@TearDown
public void freeSliceBuffers() {
valueBuffersList.clear();
}
@Benchmark
public List<byte[]> multiGet10() throws RocksDBException {
final int fromKeyIdx = next(multiGetSize, keyCount);
final List<byte[]> keys = keys(fromKeyIdx, fromKeyIdx + multiGetSize);
return db.multiGetAsList(keys);
if (fromKeyIdx >= 0) {
final List<byte[]> keys = keys(fromKeyIdx, fromKeyIdx + multiGetSize);
final List<byte[]> valueResults = db.multiGetAsList(keys);
for (final byte[] result : valueResults) {
if (result.length != valueSize)
throw new RuntimeException("Test valueSize assumption wrong");
}
}
return new ArrayList<>();
}
@Benchmark
public List<RocksDB.MultiGetInstance> multiGetDirect10() throws RocksDBException {
final int fromKeyIdx = next(multiGetSize, keyCount);
if (fromKeyIdx >= 0) {
final List<ByteBuffer> keys = keys(keyBuffersList, fromKeyIdx, fromKeyIdx + multiGetSize);
final List<RocksDB.MultiGetInstance> results = db.multiGetByteBuffers(
keys, valueBuffersList.subList(fromKeyIdx, fromKeyIdx + multiGetSize));
for (final RocksDB.MultiGetInstance result : results) {
if (result.status.getCode() != Status.Code.Ok)
throw new RuntimeException("Test status assumption wrong");
if (result.valueSize != valueSize)
throw new RuntimeException("Test valueSize assumption wrong");
}
return results;
}
return new ArrayList<>();
}
public static void main(final String[] args) throws RunnerException {
final org.openjdk.jmh.runner.options.Options opt =
new OptionsBuilder()
.include(MultiGetBenchmarks.class.getSimpleName())
.forks(1)
.jvmArgs("-ea")
.warmupIterations(1)
.measurementIterations(2)
.forks(2)
.param("columnFamilyTestType=", "1_column_family")
.param("multiGetSize=", "10", "1000")
.param("keyCount=", "1000")
.output("jmh_output")
.build();
new Runner(opt).run();
}
}

18
java/jmh/src/main/java/org/rocksdb/util/KVUtils.java
View File

@ -6,11 +6,12 @@
*/
package org.rocksdb.util;
import static java.nio.charset.StandardCharsets.UTF_8;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
import static java.nio.charset.StandardCharsets.UTF_8;
public final class KVUtils {
/**
@ -55,4 +56,17 @@ public final class KVUtils {
}
return keys;
}
public static List<ByteBuffer> keys(
final List<ByteBuffer> keyBuffers, final int from, final int to) {
final List<ByteBuffer> keys = new ArrayList<>(to - from);
for (int i = from; i < to; i++) {
final ByteBuffer key = keyBuffers.get(i);
key.clear();
key.put(ba("key" + i));
key.flip();
keys.add(key);
}
return keys;
}
}

302
java/rocksjni/rocksjni.cc
View File

@ -1685,16 +1685,18 @@ inline void multi_get_helper_release_keys(std::vector<jbyte*>& keys_to_free) {
}
/**
* cf multi get
* @brief fill a native array of cf handles from java handles
*
* @return byte[][] of values or nullptr if an exception occurs
* @param env
* @param cf_handles to fill from the java variants
* @param jcolumn_family_handles
* @return true if the copy succeeds
* @return false if a JNI exception is generated
*/
jobjectArray multi_get_helper(JNIEnv* env, jobject, ROCKSDB_NAMESPACE::DB* db,
const ROCKSDB_NAMESPACE::ReadOptions& rOpt,
jobjectArray jkeys, jintArray jkey_offs,
jintArray jkey_lens,
jlongArray jcolumn_family_handles) {
std::vector<ROCKSDB_NAMESPACE::ColumnFamilyHandle*> cf_handles;
inline bool cf_handles_from_jcf_handles(
JNIEnv* env,
std::vector<ROCKSDB_NAMESPACE::ColumnFamilyHandle*>& cf_handles,
jlongArray jcolumn_family_handles) {
if (jcolumn_family_handles != nullptr) {
const jsize len_cols = env->GetArrayLength(jcolumn_family_handles);
@ -1704,7 +1706,7 @@ jobjectArray multi_get_helper(JNIEnv* env, jobject, ROCKSDB_NAMESPACE::DB* db,
jclass exception_cls = (env)->FindClass("java/lang/OutOfMemoryError");
(env)->ThrowNew(exception_cls,
"Insufficient Memory for CF handle array.");
return nullptr;
return false;
}
for (jsize i = 0; i < len_cols; i++) {
@ -1714,13 +1716,30 @@ jobjectArray multi_get_helper(JNIEnv* env, jobject, ROCKSDB_NAMESPACE::DB* db,
}
env->ReleaseLongArrayElements(jcolumn_family_handles, jcfh, JNI_ABORT);
}
return true;
}
/**
* @brief copy keys from JNI into vector of slices for Rocks API
*
* @param keys to instantiate
* @param jkeys
* @param jkey_offs
* @param jkey_lens
* @return true if the copy succeeds
* @return false if a JNI exception is raised
*/
inline bool keys_from_jkeys(JNIEnv* env,
std::vector<ROCKSDB_NAMESPACE::Slice>& keys,
std::vector<jbyte*>& keys_to_free,
jobjectArray jkeys, jintArray jkey_offs,
jintArray jkey_lens) {
jint* jkey_off = env->GetIntArrayElements(jkey_offs, nullptr);
if (jkey_off == nullptr) {
// exception thrown: OutOfMemoryError
jclass exception_cls = (env)->FindClass("java/lang/OutOfMemoryError");
(env)->ThrowNew(exception_cls, "Insufficient Memory for key offset array.");
return nullptr;
return false;
}
jint* jkey_len = env->GetIntArrayElements(jkey_lens, nullptr);
@ -1729,12 +1748,10 @@ jobjectArray multi_get_helper(JNIEnv* env, jobject, ROCKSDB_NAMESPACE::DB* db,
env->ReleaseIntArrayElements(jkey_offs, jkey_off, JNI_ABORT);
jclass exception_cls = (env)->FindClass("java/lang/OutOfMemoryError");
(env)->ThrowNew(exception_cls, "Insufficient Memory for key length array.");
return nullptr;
return false;
}
const jsize len_keys = env->GetArrayLength(jkeys);
std::vector<ROCKSDB_NAMESPACE::Slice> keys;
std::vector<jbyte*> keys_to_free;
for (jsize i = 0; i < len_keys; i++) {
jobject jkey = env->GetObjectArrayElement(jkeys, i);
if (env->ExceptionCheck()) {
@ -1745,7 +1762,7 @@ jobjectArray multi_get_helper(JNIEnv* env, jobject, ROCKSDB_NAMESPACE::DB* db,
jclass exception_cls = (env)->FindClass("java/lang/OutOfMemoryError");
(env)->ThrowNew(exception_cls,
"Insufficient Memory for key object array.");
return nullptr;
return false;
}
jbyteArray jkey_ba = reinterpret_cast<jbyteArray>(jkey);
@ -1763,7 +1780,7 @@ jobjectArray multi_get_helper(JNIEnv* env, jobject, ROCKSDB_NAMESPACE::DB* db,
jclass exception_cls =
(env)->FindClass("java/lang/ArrayIndexOutOfBoundsException");
(env)->ThrowNew(exception_cls, "Invalid byte array region index.");
return nullptr;
return false;
}
ROCKSDB_NAMESPACE::Slice key_slice(reinterpret_cast<char*>(key), len_key);
@ -1777,6 +1794,68 @@ jobjectArray multi_get_helper(JNIEnv* env, jobject, ROCKSDB_NAMESPACE::DB* db,
env->ReleaseIntArrayElements(jkey_lens, jkey_len, JNI_ABORT);
env->ReleaseIntArrayElements(jkey_offs, jkey_off, JNI_ABORT);
return true;
}
inline bool keys_from_bytebuffers(JNIEnv* env,
std::vector<ROCKSDB_NAMESPACE::Slice>& keys,
jobjectArray jkeys, jintArray jkey_offs,
jintArray jkey_lens) {
jint* jkey_off = env->GetIntArrayElements(jkey_offs, nullptr);
if (jkey_off == nullptr) {
// exception thrown: OutOfMemoryError
jclass exception_cls = (env)->FindClass("java/lang/OutOfMemoryError");
(env)->ThrowNew(exception_cls, "Insufficient Memory for key offset array.");
return false;
}
jint* jkey_len = env->GetIntArrayElements(jkey_lens, nullptr);
if (jkey_len == nullptr) {
// exception thrown: OutOfMemoryError
env->ReleaseIntArrayElements(jkey_offs, jkey_off, JNI_ABORT);
jclass exception_cls = (env)->FindClass("java/lang/OutOfMemoryError");
(env)->ThrowNew(exception_cls, "Insufficient Memory for key length array.");
return false;
}
const jsize len_keys = env->GetArrayLength(jkeys);
for (jsize i = 0; i < len_keys; i++) {
jobject jkey = env->GetObjectArrayElement(jkeys, i);
if (env->ExceptionCheck()) {
// exception thrown: ArrayIndexOutOfBoundsException
return false;
}
char* key = reinterpret_cast<char*>(env->GetDirectBufferAddress(jkey));
ROCKSDB_NAMESPACE::Slice key_slice(key + jkey_off[i], jkey_len[i]);
keys.push_back(key_slice);
env->DeleteLocalRef(jkey);
}
return true;
}
/**
* cf multi get
*
* @return byte[][] of values or nullptr if an
* exception occurs
*/
jobjectArray multi_get_helper(JNIEnv* env, jobject, ROCKSDB_NAMESPACE::DB* db,
const ROCKSDB_NAMESPACE::ReadOptions& rOpt,
jobjectArray jkeys, jintArray jkey_offs,
jintArray jkey_lens,
jlongArray jcolumn_family_handles) {
std::vector<ROCKSDB_NAMESPACE::ColumnFamilyHandle*> cf_handles;
if (!cf_handles_from_jcf_handles(env, cf_handles, jcolumn_family_handles)) {
return nullptr;
}
std::vector<ROCKSDB_NAMESPACE::Slice> keys;
std::vector<jbyte*> keys_to_free;
if (!keys_from_jkeys(env, keys, keys_to_free, jkeys, jkey_offs, jkey_lens)) {
return nullptr;
}
std::vector<std::string> values;
std::vector<ROCKSDB_NAMESPACE::Status> s;
if (cf_handles.size() == 0) {
@ -1814,14 +1893,16 @@ jobjectArray multi_get_helper(JNIEnv* env, jobject, ROCKSDB_NAMESPACE::DB* db,
jentry_value, 0, static_cast<jsize>(jvalue_len),
const_cast<jbyte*>(reinterpret_cast<const jbyte*>(value->c_str())));
if (env->ExceptionCheck()) {
// exception thrown: ArrayIndexOutOfBoundsException
// exception thrown:
// ArrayIndexOutOfBoundsException
env->DeleteLocalRef(jentry_value);
return nullptr;
}
env->SetObjectArrayElement(jresults, static_cast<jsize>(i), jentry_value);
if (env->ExceptionCheck()) {
// exception thrown: ArrayIndexOutOfBoundsException
// exception thrown:
// ArrayIndexOutOfBoundsException
env->DeleteLocalRef(jentry_value);
return nullptr;
}
@ -1833,14 +1914,129 @@ jobjectArray multi_get_helper(JNIEnv* env, jobject, ROCKSDB_NAMESPACE::DB* db,
return jresults;
}
/**
* cf multi get
*
* fill supplied native buffers, or raise JNI
* exception on a problem
*/
/**
* @brief multi_get_helper_direct for fast-path multiget (io_uring) on Linux
*
* @param env
* @param db
* @param rOpt read options
* @param jcolumn_family_handles 0, 1, or n column family handles
* @param jkeys
* @param jkey_offsets
* @param jkey_lengths
* @param jvalues byte buffers to receive values
* @param jvalue_sizes returned actual sizes of data values for keys
* @param jstatuses returned java RocksDB status values for per key
*/
void multi_get_helper_direct(JNIEnv* env, jobject, ROCKSDB_NAMESPACE::DB* db,
const ROCKSDB_NAMESPACE::ReadOptions& rOpt,
jlongArray jcolumn_family_handles,
jobjectArray jkeys, jintArray jkey_offsets,
jintArray jkey_lengths, jobjectArray jvalues,
jintArray jvalue_sizes, jobjectArray jstatuses) {
const jsize num_keys = env->GetArrayLength(jkeys);
std::vector<ROCKSDB_NAMESPACE::Slice> keys;
if (!keys_from_bytebuffers(env, keys, jkeys, jkey_offsets, jkey_lengths)) {
return;
}
std::vector<ROCKSDB_NAMESPACE::PinnableSlice> values(num_keys);
std::vector<ROCKSDB_NAMESPACE::ColumnFamilyHandle*> cf_handles;
if (!cf_handles_from_jcf_handles(env, cf_handles, jcolumn_family_handles)) {
return;
}
std::vector<ROCKSDB_NAMESPACE::Status> s(num_keys);
if (cf_handles.size() == 0) {
// we can use the more efficient call here
auto cf_handle = db->DefaultColumnFamily();
db->MultiGet(rOpt, cf_handle, num_keys, keys.data(), values.data(),
s.data());
} else if (cf_handles.size() == 1) {
// we can use the more efficient call here
auto cf_handle = cf_handles[0];
db->MultiGet(rOpt, cf_handle, num_keys, keys.data(), values.data(),
s.data());
} else {
// multiple CFs version
db->MultiGet(rOpt, num_keys, cf_handles.data(), keys.data(), values.data(),
s.data());
}
// prepare the results
jobjectArray jresults = ROCKSDB_NAMESPACE::ByteJni::new2dByteArray(
env, static_cast<jsize>(s.size()));
if (jresults == nullptr) {
// exception occurred
jclass exception_cls = (env)->FindClass("java/lang/OutOfMemoryError");
(env)->ThrowNew(exception_cls, "Insufficient Memory for results.");
return;
}
std::vector<jint> value_size;
for (int i = 0; i < num_keys; i++) {
auto jstatus = ROCKSDB_NAMESPACE::StatusJni::construct(env, s[i]);
if (jstatus == nullptr) {
// exception in context
return;
}
env->SetObjectArrayElement(jstatuses, i, jstatus);
if (s[i].ok()) {
jobject jvalue_bytebuf = env->GetObjectArrayElement(jvalues, i);
if (env->ExceptionCheck()) {
// ArrayIndexOutOfBoundsException is thrown
return;
}
jlong jvalue_capacity = env->GetDirectBufferCapacity(jvalue_bytebuf);
if (jvalue_capacity == -1) {
ROCKSDB_NAMESPACE::RocksDBExceptionJni::ThrowNew(
env,
"Invalid value(s) argument (argument is not a valid direct "
"ByteBuffer)");
return;
}
void* jvalue_address = env->GetDirectBufferAddress(jvalue_bytebuf);
if (jvalue_address == nullptr) {
ROCKSDB_NAMESPACE::RocksDBExceptionJni::ThrowNew(
env,
"Invalid value(s) argument (argument is not a valid direct "
"ByteBuffer)");
return;
}
// record num returned, push back that number, which may be bigger then
// the ByteBuffer supplied. then copy as much as fits in the ByteBuffer.
value_size.push_back(static_cast<jint>(values[i].size()));
auto copy_bytes =
std::min(static_cast<jlong>(values[i].size()), jvalue_capacity);
memcpy(jvalue_address, values[i].data(), copy_bytes);
} else {
// bad status for this
value_size.push_back(0);
}
}
env->SetIntArrayRegion(jvalue_sizes, 0, num_keys, value_size.data());
}
/*
* Class: org_rocksdb_RocksDB
* Method: multiGet
* Signature: (J[[B[I[I)[[B
*/
jobjectArray Java_org_rocksdb_RocksDB_multiGet__J_3_3B_3I_3I(
JNIEnv* env, jobject jdb, jlong jdb_handle,
jobjectArray jkeys, jintArray jkey_offs, jintArray jkey_lens) {
JNIEnv* env, jobject jdb, jlong jdb_handle, jobjectArray jkeys,
jintArray jkey_offs, jintArray jkey_lens) {
return multi_get_helper(
env, jdb, reinterpret_cast<ROCKSDB_NAMESPACE::DB*>(jdb_handle),
ROCKSDB_NAMESPACE::ReadOptions(), jkeys, jkey_offs, jkey_lens, nullptr);
@ -1852,8 +2048,8 @@ jobjectArray Java_org_rocksdb_RocksDB_multiGet__J_3_3B_3I_3I(
* Signature: (J[[B[I[I[J)[[B
*/
jobjectArray Java_org_rocksdb_RocksDB_multiGet__J_3_3B_3I_3I_3J(
JNIEnv* env, jobject jdb, jlong jdb_handle,
jobjectArray jkeys, jintArray jkey_offs, jintArray jkey_lens,
JNIEnv* env, jobject jdb, jlong jdb_handle, jobjectArray jkeys,
jintArray jkey_offs, jintArray jkey_lens,
jlongArray jcolumn_family_handles) {
return multi_get_helper(env, jdb,
reinterpret_cast<ROCKSDB_NAMESPACE::DB*>(jdb_handle),
@ -1890,38 +2086,60 @@ jobjectArray Java_org_rocksdb_RocksDB_multiGet__JJ_3_3B_3I_3I_3J(
jkey_offs, jkey_lens, jcolumn_family_handles);
}
/*
* Class: org_rocksdb_RocksDB
* Method: multiGet
* Signature:
* (JJ[J[Ljava/nio/ByteBuffer;[I[I[Ljava/nio/ByteBuffer;[I[Lorg/rocksdb/Status;)V
*/
void Java_org_rocksdb_RocksDB_multiGet__JJ_3J_3Ljava_nio_ByteBuffer_2_3I_3I_3Ljava_nio_ByteBuffer_2_3I_3Lorg_rocksdb_Status_2(
JNIEnv* env, jobject jdb, jlong jdb_handle, jlong jropt_handle,
jlongArray jcolumn_family_handles, jobjectArray jkeys,
jintArray jkey_offsets, jintArray jkey_lengths, jobjectArray jvalues,
jintArray jvalues_sizes, jobjectArray jstatus_objects) {
return multi_get_helper_direct(
env, jdb, reinterpret_cast<ROCKSDB_NAMESPACE::DB*>(jdb_handle),
*reinterpret_cast<ROCKSDB_NAMESPACE::ReadOptions*>(jropt_handle),
jcolumn_family_handles, jkeys, jkey_offsets, jkey_lengths, jvalues,
jvalues_sizes, jstatus_objects);
}
// private native void
// multiGet(final long dbHandle, final long rOptHandle,
// final long[] columnFamilyHandles, final ByteBuffer[] keysArray,
// final ByteBuffer[] valuesArray);
//////////////////////////////////////////////////////////////////////////////
// ROCKSDB_NAMESPACE::DB::KeyMayExist
bool key_may_exist_helper(JNIEnv* env, jlong jdb_handle, jlong jcf_handle,
jlong jread_opts_handle,
jbyteArray jkey, jint jkey_offset, jint jkey_len,
bool* has_exception, std::string* value, bool* value_found) {
jlong jread_opts_handle, jbyteArray jkey,
jint jkey_offset, jint jkey_len, bool* has_exception,
std::string* value, bool* value_found) {
auto* db = reinterpret_cast<ROCKSDB_NAMESPACE::DB*>(jdb_handle);
ROCKSDB_NAMESPACE::ColumnFamilyHandle* cf_handle;
if (jcf_handle == 0) {
cf_handle = db->DefaultColumnFamily();
} else {
cf_handle =
reinterpret_cast<ROCKSDB_NAMESPACE::ColumnFamilyHandle*>(jcf_handle);
}
ROCKSDB_NAMESPACE::ReadOptions read_opts =
jread_opts_handle == 0
? ROCKSDB_NAMESPACE::ReadOptions()
: *(reinterpret_cast<ROCKSDB_NAMESPACE::ReadOptions*>(
jread_opts_handle));
} else {
cf_handle =
reinterpret_cast<ROCKSDB_NAMESPACE::ColumnFamilyHandle*>(jcf_handle);
}
ROCKSDB_NAMESPACE::ReadOptions read_opts =
jread_opts_handle == 0
? ROCKSDB_NAMESPACE::ReadOptions()
: *(reinterpret_cast<ROCKSDB_NAMESPACE::ReadOptions*>(
jread_opts_handle));
jbyte* key = new jbyte[jkey_len];
env->GetByteArrayRegion(jkey, jkey_offset, jkey_len, key);
if (env->ExceptionCheck()) {
// exception thrown: ArrayIndexOutOfBoundsException
delete[] key;
*has_exception = true;
return false;
jbyte* key = new jbyte[jkey_len];
env->GetByteArrayRegion(jkey, jkey_offset, jkey_len, key);
if (env->ExceptionCheck()) {
// exception thrown: ArrayIndexOutOfBoundsException
delete[] key;
*has_exception = true;
return false;
}
ROCKSDB_NAMESPACE::Slice key_slice(reinterpret_cast<char*>(key), jkey_len);
const bool exists = db->KeyMayExist(
read_opts, cf_handle, key_slice, value, value_found);
const bool exists =
db->KeyMayExist(read_opts, cf_handle, key_slice, value, value_found);
// cleanup
delete[] key;

44
java/src/main/java/org/rocksdb/ByteBufferGetStatus.java Normal file
View File

@ -0,0 +1,44 @@
package org.rocksdb;
import java.nio.ByteBuffer;
import java.util.List;
/**
* A ByteBuffer containing fetched data, together with a result for the fetch
* and the total size of the object fetched.
*
* Used for the individual results of
* {@link RocksDB#multiGetByteBuffers(List, List)}
* {@link RocksDB#multiGetByteBuffers(List, List, List)}
* {@link RocksDB#multiGetByteBuffers(ReadOptions, List, List)}
* {@link RocksDB#multiGetByteBuffers(ReadOptions, List, List, List)}
*/
public class ByteBufferGetStatus {
public final Status status;
public final int requiredSize;
public final ByteBuffer value;
/**
* Constructor used for success status, when the value is contained in the buffer
*
* @param status the status of the request to fetch into the buffer
* @param requiredSize the size of the data, which may be bigger than the buffer
* @param value the buffer containing as much of the value as fits
*/
ByteBufferGetStatus(final Status status, final int requiredSize, final ByteBuffer value) {
this.status = status;
this.requiredSize = requiredSize;
this.value = value;
}
/**
* Constructor used for a failure status, when no value is filled in
*
* @param status the status of the request to fetch into the buffer
*/
ByteBufferGetStatus(final Status status) {
this.status = status;
this.requiredSize = 0;
this.value = null;
}
}

166
java/src/main/java/org/rocksdb/RocksDB.java
View File

@ -31,14 +31,14 @@ public class RocksDB extends RocksObject {
LOADED
}
private static AtomicReference<LibraryState> libraryLoaded
= new AtomicReference<>(LibraryState.NOT_LOADED);
private static final AtomicReference<LibraryState> libraryLoaded =
new AtomicReference<>(LibraryState.NOT_LOADED);
static {
RocksDB.loadLibrary();
}
private List<ColumnFamilyHandle> ownedColumnFamilyHandles = new ArrayList<>();
private final List<ColumnFamilyHandle> ownedColumnFamilyHandles = new ArrayList<>();
/**
* Loads the necessary library files.
@ -2544,6 +2544,154 @@ public class RocksDB extends RocksObject {
keysArray, keyOffsets, keyLengths, cfHandles));
}
/**
* Fetches a list of values for the given list of keys, all from the default column family.
*
* @param keys list of keys for which values need to be retrieved.
* @param values list of buffers to return retrieved values in
* @return list of number of bytes in DB for each requested key
* this can be more than the size of the corresponding buffer; then the buffer will be filled
* with the appropriate truncation of the database value.
* @throws RocksDBException if error happens in underlying native library.
* @throws IllegalArgumentException thrown if the number of passed keys and passed values
* do not match.
*/
public List<ByteBufferGetStatus> multiGetByteBuffers(
final List<ByteBuffer> keys, final List<ByteBuffer> values) throws RocksDBException {
final ReadOptions readOptions = new ReadOptions();
final List<ColumnFamilyHandle> columnFamilyHandleList = new ArrayList<>(1);
columnFamilyHandleList.add(getDefaultColumnFamily());
return multiGetByteBuffers(readOptions, columnFamilyHandleList, keys, values);
}
/**
* Fetches a list of values for the given list of keys, all from the default column family.
*
* @param readOptions Read options
* @param keys list of keys for which values need to be retrieved.
* @param values list of buffers to return retrieved values in
* @throws RocksDBException if error happens in underlying native library.
* @throws IllegalArgumentException thrown if the number of passed keys and passed values
* do not match.
*/
public List<ByteBufferGetStatus> multiGetByteBuffers(final ReadOptions readOptions,
final List<ByteBuffer> keys, final List<ByteBuffer> values) throws RocksDBException {
final List<ColumnFamilyHandle> columnFamilyHandleList = new ArrayList<>(1);
columnFamilyHandleList.add(getDefaultColumnFamily());
return multiGetByteBuffers(readOptions, columnFamilyHandleList, keys, values);
}
/**
* Fetches a list of values for the given list of keys.
* <p>
* Note: Every key needs to have a related column family name in
* {@code columnFamilyHandleList}.
* </p>
*
* @param columnFamilyHandleList {@link java.util.List} containing
* {@link org.rocksdb.ColumnFamilyHandle} instances.
* @param keys list of keys for which values need to be retrieved.
* @param values list of buffers to return retrieved values in
* @throws RocksDBException if error happens in underlying native library.
* @throws IllegalArgumentException thrown if the number of passed keys, passed values and
* passed column family handles do not match.
*/
public List<ByteBufferGetStatus> multiGetByteBuffers(
final List<ColumnFamilyHandle> columnFamilyHandleList, final List<ByteBuffer> keys,
final List<ByteBuffer> values) throws RocksDBException {
final ReadOptions readOptions = new ReadOptions();
return multiGetByteBuffers(readOptions, columnFamilyHandleList, keys, values);
}
/**
* Fetches a list of values for the given list of keys.
* <p>
* Note: Every key needs to have a related column family name in
* {@code columnFamilyHandleList}.
* </p>
*
* @param readOptions Read options
* @param columnFamilyHandleList {@link java.util.List} containing
* {@link org.rocksdb.ColumnFamilyHandle} instances.
* @param keys list of keys for which values need to be retrieved.
* @param values list of buffers to return retrieved values in
* @throws RocksDBException if error happens in underlying native library.
* @throws IllegalArgumentException thrown if the number of passed keys, passed values and
* passed column family handles do not match.
*/
public List<ByteBufferGetStatus> multiGetByteBuffers(final ReadOptions readOptions,
final List<ColumnFamilyHandle> columnFamilyHandleList, final List<ByteBuffer> keys,
final List<ByteBuffer> values) throws RocksDBException {
assert (keys.size() != 0);
// Check if key size equals cfList size. If not a exception must be
// thrown. If not a Segmentation fault happens.
if (keys.size() != columnFamilyHandleList.size() && columnFamilyHandleList.size() > 1) {
throw new IllegalArgumentException(
"Wrong number of ColumnFamilyHandle(s) supplied. Provide 0, 1, or as many as there are key/value(s)");
}
// Check if key size equals cfList size. If not a exception must be
// thrown. If not a Segmentation fault happens.
if (values.size() != keys.size()) {
throw new IllegalArgumentException("For each key there must be a corresponding value.");
}
// TODO (AP) support indirect buffers
for (final ByteBuffer key : keys) {
if (!key.isDirect()) {
throw new IllegalArgumentException("All key buffers must be direct byte buffers");
}
}
// TODO (AP) support indirect buffers, though probably via a less efficient code path
for (final ByteBuffer value : values) {
if (!value.isDirect()) {
throw new IllegalArgumentException("All value buffers must be direct byte buffers");
}
}
final int numCFHandles = columnFamilyHandleList.size();
final long[] cfHandles = new long[numCFHandles];
for (int i = 0; i < numCFHandles; i++) {
cfHandles[i] = columnFamilyHandleList.get(i).nativeHandle_;
}
final int numValues = keys.size();
final ByteBuffer[] keysArray = keys.toArray(new ByteBuffer[0]);
final int[] keyOffsets = new int[numValues];
final int[] keyLengths = new int[numValues];
for (int i = 0; i < numValues; i++) {
// TODO (AP) add keysArray[i].arrayOffset() if the buffer is indirect
// TODO (AP) because in that case we have to pass the array directly,
// so that the JNI C++ code will not know to compensate for the array offset
keyOffsets[i] = keysArray[i].position();
keyLengths[i] = keysArray[i].limit();
}
final ByteBuffer[] valuesArray = values.toArray(new ByteBuffer[0]);
final int[] valuesSizeArray = new int[numValues];
final Status[] statusArray = new Status[numValues];
multiGet(nativeHandle_, readOptions.nativeHandle_, cfHandles, keysArray, keyOffsets, keyLengths,
valuesArray, valuesSizeArray, statusArray);
final List<ByteBufferGetStatus> results = new ArrayList<>();
for (int i = 0; i < numValues; i++) {
final Status status = statusArray[i];
if (status.getCode() == Status.Code.Ok) {
final ByteBuffer value = valuesArray[i];
value.position(Math.min(valuesSizeArray[i], value.capacity()));
value.flip(); // prepare for read out
results.add(new ByteBufferGetStatus(status, valuesSizeArray[i], value));
} else {
results.add(new ByteBufferGetStatus(status));
}
}
return results;
}
/**
* If the key definitely does not exist in the database, then this method
* returns false, otherwise it returns true if the key might exist.
@ -4841,6 +4989,12 @@ public class RocksDB extends RocksObject {
private native byte[][] multiGet(final long dbHandle, final long rOptHandle,
final byte[][] keys, final int[] keyOffsets, final int[] keyLengths,
final long[] columnFamilyHandles);
private native void multiGet(final long dbHandle, final long rOptHandle,
final long[] columnFamilyHandles, final ByteBuffer[] keysArray, final int[] keyOffsets,
final int[] keyLengths, final ByteBuffer[] valuesArray, final int[] valuesSizeArray,
final Status[] statusArray);
private native boolean keyMayExist(
final long handle, final long cfHandle, final long readOptHandle,
final byte[] key, final int keyOffset, final int keyLength);
@ -4887,9 +5041,9 @@ public class RocksDB extends RocksObject {
private native long[] getApproximateSizes(final long nativeHandle,
final long columnFamilyHandle, final long[] rangeSliceHandles,
final byte includeFlags);
private final native long[] getApproximateMemTableStats(
final long nativeHandle, final long columnFamilyHandle,
final long rangeStartSliceHandle, final long rangeLimitSliceHandle);
private native long[] getApproximateMemTableStats(final long nativeHandle,
final long columnFamilyHandle, final long rangeStartSliceHandle,
final long rangeLimitSliceHandle);
private native void compactRange(final long handle,
/* @Nullable */ final byte[] begin, final int beginLen,
/* @Nullable */ final byte[] end, final int endLen,

491
java/src/test/java/org/rocksdb/MultiGetTest.java
View File

@ -5,12 +5,16 @@
package org.rocksdb;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.fail;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import org.rocksdb.util.TestUtil;
public class MultiGetTest {
@Rule public TemporaryFolder dbFolder = new TemporaryFolder();
@ -31,4 +35,491 @@ public class MultiGetTest {
assertThat(values.get(2)).isEqualTo("value3ForKey3".getBytes());
}
}
@Test
public void putNThenMultiGetDirect() throws RocksDBException {
try (final Options opt = new Options().setCreateIfMissing(true);
final RocksDB db = RocksDB.open(opt, dbFolder.getRoot().getAbsolutePath())) {
db.put("key1".getBytes(), "value1ForKey1".getBytes());
db.put("key2".getBytes(), "value2ForKey2".getBytes());
db.put("key3".getBytes(), "value3ForKey3".getBytes());
final List<ByteBuffer> keys = new ArrayList<>();
keys.add(ByteBuffer.allocateDirect(12).put("key1".getBytes()));
keys.add(ByteBuffer.allocateDirect(12).put("key2".getBytes()));
keys.add(ByteBuffer.allocateDirect(12).put("key3".getBytes()));
// Java8 and lower flip() returns Buffer not ByteBuffer, so can't chain above /\/\
for (final ByteBuffer key : keys) {
key.flip();
}
final List<ByteBuffer> values = new ArrayList<>();
for (int i = 0; i < keys.size(); i++) {
values.add(ByteBuffer.allocateDirect(24));
}
{
final List<ByteBufferGetStatus> results = db.multiGetByteBuffers(keys, values);
assertThat(results.get(0).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(1).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(2).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(0).requiredSize).isEqualTo("value1ForKey1".getBytes().length);
assertThat(results.get(1).requiredSize).isEqualTo("value2ForKey2".getBytes().length);
assertThat(results.get(2).requiredSize).isEqualTo("value3ForKey3".getBytes().length);
assertThat(TestUtil.bufferBytes(results.get(0).value))
.isEqualTo("value1ForKey1".getBytes());
assertThat(TestUtil.bufferBytes(results.get(1).value))
.isEqualTo("value2ForKey2".getBytes());
assertThat(TestUtil.bufferBytes(results.get(2).value))
.isEqualTo("value3ForKey3".getBytes());
}
{
final List<ByteBufferGetStatus> results =
db.multiGetByteBuffers(new ReadOptions(), keys, values);
assertThat(results.get(0).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(1).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(2).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(0).requiredSize).isEqualTo("value1ForKey1".getBytes().length);
assertThat(results.get(1).requiredSize).isEqualTo("value2ForKey2".getBytes().length);
assertThat(results.get(2).requiredSize).isEqualTo("value3ForKey3".getBytes().length);
assertThat(TestUtil.bufferBytes(results.get(0).value))
.isEqualTo("value1ForKey1".getBytes());
assertThat(TestUtil.bufferBytes(results.get(1).value))
.isEqualTo("value2ForKey2".getBytes());
assertThat(TestUtil.bufferBytes(results.get(2).value))
.isEqualTo("value3ForKey3".getBytes());
}
}
}
@Test
public void putNThenMultiGetDirectSliced() throws RocksDBException {
try (final Options opt = new Options().setCreateIfMissing(true);
final RocksDB db = RocksDB.open(opt, dbFolder.getRoot().getAbsolutePath())) {
db.put("key1".getBytes(), "value1ForKey1".getBytes());
db.put("key2".getBytes(), "value2ForKey2".getBytes());
db.put("key3".getBytes(), "value3ForKey3".getBytes());
final List<ByteBuffer> keys = new ArrayList<>();
keys.add(ByteBuffer.allocateDirect(12).put("key2".getBytes()));
keys.add(ByteBuffer.allocateDirect(12).put("key3".getBytes()));
keys.add(
ByteBuffer.allocateDirect(12).put("prefix1".getBytes()).slice().put("key1".getBytes()));
// Java8 and lower flip() returns Buffer not ByteBuffer, so can't chain above /\/\
for (final ByteBuffer key : keys) {
key.flip();
}
final List<ByteBuffer> values = new ArrayList<>();
for (int i = 0; i < keys.size(); i++) {
values.add(ByteBuffer.allocateDirect(24));
}
{
final List<ByteBufferGetStatus> results = db.multiGetByteBuffers(keys, values);
assertThat(results.get(0).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(1).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(2).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(1).requiredSize).isEqualTo("value2ForKey2".getBytes().length);
assertThat(results.get(2).requiredSize).isEqualTo("value3ForKey3".getBytes().length);
assertThat(results.get(0).requiredSize).isEqualTo("value1ForKey1".getBytes().length);
assertThat(TestUtil.bufferBytes(results.get(0).value))
.isEqualTo("value2ForKey2".getBytes());
assertThat(TestUtil.bufferBytes(results.get(1).value))
.isEqualTo("value3ForKey3".getBytes());
assertThat(TestUtil.bufferBytes(results.get(2).value))
.isEqualTo("value1ForKey1".getBytes());
}
}
}
@Test
public void putNThenMultiGetDirectBadValuesArray() throws RocksDBException {
try (final Options opt = new Options().setCreateIfMissing(true);
final RocksDB db = RocksDB.open(opt, dbFolder.getRoot().getAbsolutePath())) {
db.put("key1".getBytes(), "value1ForKey1".getBytes());
db.put("key2".getBytes(), "value2ForKey2".getBytes());
db.put("key3".getBytes(), "value3ForKey3".getBytes());
final List<ByteBuffer> keys = new ArrayList<>();
keys.add(ByteBuffer.allocateDirect(12).put("key1".getBytes()));
keys.add(ByteBuffer.allocateDirect(12).put("key2".getBytes()));
keys.add(ByteBuffer.allocateDirect(12).put("key3".getBytes()));
// Java8 and lower flip() returns Buffer not ByteBuffer, so can't chain above /\/\
for (final ByteBuffer key : keys) {
key.flip();
}
{
final List<ByteBuffer> values = new ArrayList<>();
for (int i = 0; i < keys.size(); i++) {
values.add(ByteBuffer.allocateDirect(24));
}
values.remove(0);
try {
db.multiGetByteBuffers(keys, values);
fail("Expected exception when not enough value ByteBuffers supplied");
} catch (final IllegalArgumentException e) {
assertThat(e.getMessage()).contains("For each key there must be a corresponding value");
}
}
{
final List<ByteBuffer> values = new ArrayList<>();
for (int i = 0; i < keys.size(); i++) {
values.add(ByteBuffer.allocateDirect(24));
}
values.add(ByteBuffer.allocateDirect(24));
try {
db.multiGetByteBuffers(keys, values);
fail("Expected exception when too many value ByteBuffers supplied");
} catch (final IllegalArgumentException e) {
assertThat(e.getMessage()).contains("For each key there must be a corresponding value");
}
}
}
}
@Test
public void putNThenMultiGetDirectShortValueBuffers() throws RocksDBException {
try (final Options opt = new Options().setCreateIfMissing(true);
final RocksDB db = RocksDB.open(opt, dbFolder.getRoot().getAbsolutePath())) {
db.put("key1".getBytes(), "value1ForKey1".getBytes());
db.put("key2".getBytes(), "value2ForKey2".getBytes());
db.put("key3".getBytes(), "value3ForKey3".getBytes());
final List<ByteBuffer> keys = new ArrayList<>();
keys.add(ByteBuffer.allocateDirect(12).put("key1".getBytes()));
keys.add(ByteBuffer.allocateDirect(12).put("key2".getBytes()));
keys.add(ByteBuffer.allocateDirect(12).put("key3".getBytes()));
// Java8 and lower flip() returns Buffer not ByteBuffer, so can't chain above /\/\
for (final ByteBuffer key : keys) {
key.flip();
}
{
final List<ByteBuffer> values = new ArrayList<>();
for (int i = 0; i < keys.size(); i++) {
values.add(ByteBuffer.allocateDirect(4));
}
final List<ByteBufferGetStatus> statii = db.multiGetByteBuffers(keys, values);
assertThat(statii.size()).isEqualTo(values.size());
for (final ByteBufferGetStatus status : statii) {
assertThat(status.status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(status.requiredSize).isEqualTo("value3ForKey3".getBytes().length);
final ByteBuffer expected =
ByteBuffer.allocateDirect(24).put(Arrays.copyOf("valueX".getBytes(), 4));
expected.flip();
assertThat(status.value).isEqualTo(expected);
}
}
}
}
@Test
public void putNThenMultiGetDirectNondefaultCF() throws RocksDBException {
try (final Options opt = new Options().setCreateIfMissing(true);
final RocksDB db = RocksDB.open(opt, dbFolder.getRoot().getAbsolutePath())) {
final List<ColumnFamilyDescriptor> cfDescriptors = new ArrayList<>(0);
cfDescriptors.add(new ColumnFamilyDescriptor("cf0".getBytes()));
cfDescriptors.add(new ColumnFamilyDescriptor("cf1".getBytes()));
cfDescriptors.add(new ColumnFamilyDescriptor("cf2".getBytes()));
final List<ColumnFamilyHandle> cf = db.createColumnFamilies(cfDescriptors);
db.put(cf.get(0), "key1".getBytes(), "value1ForKey1".getBytes());
db.put(cf.get(0), "key2".getBytes(), "value2ForKey2".getBytes());
db.put(cf.get(0), "key3".getBytes(), "value3ForKey3".getBytes());
final List<ByteBuffer> keys = new ArrayList<>();
keys.add(ByteBuffer.allocateDirect(12).put("key1".getBytes()));
keys.add(ByteBuffer.allocateDirect(12).put("key2".getBytes()));
keys.add(ByteBuffer.allocateDirect(12).put("key3".getBytes()));
// Java8 and lower flip() returns Buffer not ByteBuffer, so can't chain above /\/\
for (final ByteBuffer key : keys) {
key.flip();
}
final List<ByteBuffer> values = new ArrayList<>();
for (int i = 0; i < keys.size(); i++) {
values.add(ByteBuffer.allocateDirect(24));
}
{
final List<ByteBufferGetStatus> results = db.multiGetByteBuffers(keys, values);
assertThat(results.get(0).status.getCode()).isEqualTo(Status.Code.NotFound);
assertThat(results.get(1).status.getCode()).isEqualTo(Status.Code.NotFound);
assertThat(results.get(2).status.getCode()).isEqualTo(Status.Code.NotFound);
}
{
final List<ColumnFamilyHandle> columnFamilyHandles = new ArrayList<>();
columnFamilyHandles.add(cf.get(0));
final List<ByteBufferGetStatus> results =
db.multiGetByteBuffers(columnFamilyHandles, keys, values);
assertThat(results.get(0).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(1).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(2).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(0).requiredSize).isEqualTo("value1ForKey1".getBytes().length);
assertThat(results.get(1).requiredSize).isEqualTo("value2ForKey2".getBytes().length);
assertThat(results.get(2).requiredSize).isEqualTo("value3ForKey3".getBytes().length);
assertThat(TestUtil.bufferBytes(results.get(0).value))
.isEqualTo("value1ForKey1".getBytes());
assertThat(TestUtil.bufferBytes(results.get(1).value))
.isEqualTo("value2ForKey2".getBytes());
assertThat(TestUtil.bufferBytes(results.get(2).value))
.isEqualTo("value3ForKey3".getBytes());
}
{
final List<ColumnFamilyHandle> columnFamilyHandles = new ArrayList<>();
columnFamilyHandles.add(cf.get(0));
columnFamilyHandles.add(cf.get(0));
columnFamilyHandles.add(cf.get(0));
final List<ByteBufferGetStatus> results =
db.multiGetByteBuffers(columnFamilyHandles, keys, values);
assertThat(results.get(0).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(1).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(2).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(0).requiredSize).isEqualTo("value1ForKey1".getBytes().length);
assertThat(results.get(1).requiredSize).isEqualTo("value2ForKey2".getBytes().length);
assertThat(results.get(2).requiredSize).isEqualTo("value3ForKey3".getBytes().length);
assertThat(TestUtil.bufferBytes(results.get(0).value))
.isEqualTo("value1ForKey1".getBytes());
assertThat(TestUtil.bufferBytes(results.get(1).value))
.isEqualTo("value2ForKey2".getBytes());
assertThat(TestUtil.bufferBytes(results.get(2).value))
.isEqualTo("value3ForKey3".getBytes());
}
}
}
@Test
public void putNThenMultiGetDirectCFParams() throws RocksDBException {
try (final Options opt = new Options().setCreateIfMissing(true);
final RocksDB db = RocksDB.open(opt, dbFolder.getRoot().getAbsolutePath())) {
db.put("key1".getBytes(), "value1ForKey1".getBytes());
db.put("key2".getBytes(), "value2ForKey2".getBytes());
db.put("key3".getBytes(), "value3ForKey3".getBytes());
final List<ColumnFamilyHandle> columnFamilyHandles = new ArrayList<>();
columnFamilyHandles.add(db.getDefaultColumnFamily());
columnFamilyHandles.add(db.getDefaultColumnFamily());
final List<ByteBuffer> keys = new ArrayList<>();
keys.add(ByteBuffer.allocateDirect(12).put("key1".getBytes()));
keys.add(ByteBuffer.allocateDirect(12).put("key2".getBytes()));
keys.add(ByteBuffer.allocateDirect(12).put("key3".getBytes()));
// Java8 and lower flip() returns Buffer not ByteBuffer, so can't chain above /\/\
for (final ByteBuffer key : keys) {
key.flip();
}
final List<ByteBuffer> values = new ArrayList<>();
for (int i = 0; i < keys.size(); i++) {
values.add(ByteBuffer.allocateDirect(24));
}
try {
db.multiGetByteBuffers(columnFamilyHandles, keys, values);
fail("Expected exception when 2 column families supplied");
} catch (final IllegalArgumentException e) {
assertThat(e.getMessage()).contains("Wrong number of ColumnFamilyHandle(s) supplied");
}
columnFamilyHandles.clear();
columnFamilyHandles.add(db.getDefaultColumnFamily());
final List<ByteBufferGetStatus> results =
db.multiGetByteBuffers(columnFamilyHandles, keys, values);
assertThat(results.get(0).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(1).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(2).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(0).requiredSize).isEqualTo("value1ForKey1".getBytes().length);
assertThat(results.get(1).requiredSize).isEqualTo("value2ForKey2".getBytes().length);
assertThat(results.get(2).requiredSize).isEqualTo("value3ForKey3".getBytes().length);
assertThat(TestUtil.bufferBytes(results.get(0).value)).isEqualTo("value1ForKey1".getBytes());
assertThat(TestUtil.bufferBytes(results.get(1).value)).isEqualTo("value2ForKey2".getBytes());
assertThat(TestUtil.bufferBytes(results.get(2).value)).isEqualTo("value3ForKey3".getBytes());
}
}
@Test
public void putNThenMultiGetDirectMixedCF() throws RocksDBException {
try (final Options opt = new Options().setCreateIfMissing(true);
final RocksDB db = RocksDB.open(opt, dbFolder.getRoot().getAbsolutePath())) {
final List<ColumnFamilyDescriptor> cfDescriptors = new ArrayList<>();
cfDescriptors.add(new ColumnFamilyDescriptor("cf0".getBytes()));
cfDescriptors.add(new ColumnFamilyDescriptor("cf1".getBytes()));
cfDescriptors.add(new ColumnFamilyDescriptor("cf2".getBytes()));
cfDescriptors.add(new ColumnFamilyDescriptor("cf3".getBytes()));
final List<ColumnFamilyHandle> cf = db.createColumnFamilies(cfDescriptors);
db.put(cf.get(1), "key1".getBytes(), "value1ForKey1".getBytes());
db.put("key2".getBytes(), "value2ForKey2".getBytes());
db.put(cf.get(3), "key3".getBytes(), "value3ForKey3".getBytes());
final List<ByteBuffer> keys = new ArrayList<>();
keys.add(ByteBuffer.allocateDirect(12).put("key1".getBytes()));
keys.add(ByteBuffer.allocateDirect(12).put("key2".getBytes()));
keys.add(ByteBuffer.allocateDirect(12).put("key3".getBytes()));
// Java8 and lower flip() returns Buffer not ByteBuffer, so can't chain above /\/\
for (final ByteBuffer key : keys) {
key.flip();
}
final List<ByteBuffer> values = new ArrayList<>();
for (int i = 0; i < keys.size(); i++) {
values.add(ByteBuffer.allocateDirect(24));
}
{
final List<ColumnFamilyHandle> columnFamilyHandles = new ArrayList<>();
columnFamilyHandles.add(db.getDefaultColumnFamily());
final List<ByteBufferGetStatus> results =
db.multiGetByteBuffers(columnFamilyHandles, keys, values);
assertThat(results.get(0).status.getCode()).isEqualTo(Status.Code.NotFound);
assertThat(results.get(1).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(2).status.getCode()).isEqualTo(Status.Code.NotFound);
assertThat(results.get(1).requiredSize).isEqualTo("value2ForKey2".getBytes().length);
assertThat(TestUtil.bufferBytes(results.get(1).value))
.isEqualTo("value2ForKey2".getBytes());
}
{
final List<ColumnFamilyHandle> columnFamilyHandles = new ArrayList<>();
columnFamilyHandles.add(cf.get(1));
final List<ByteBufferGetStatus> results =
db.multiGetByteBuffers(columnFamilyHandles, keys, values);
assertThat(results.get(0).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(1).status.getCode()).isEqualTo(Status.Code.NotFound);
assertThat(results.get(2).status.getCode()).isEqualTo(Status.Code.NotFound);
assertThat(results.get(0).requiredSize).isEqualTo("value2ForKey2".getBytes().length);
assertThat(TestUtil.bufferBytes(results.get(0).value))
.isEqualTo("value1ForKey1".getBytes());
}
{
final List<ColumnFamilyHandle> columnFamilyHandles = new ArrayList<>();
columnFamilyHandles.add(cf.get(1));
columnFamilyHandles.add(db.getDefaultColumnFamily());
columnFamilyHandles.add(cf.get(3));
final List<ByteBufferGetStatus> results =
db.multiGetByteBuffers(columnFamilyHandles, keys, values);
assertThat(results.get(0).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(1).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(2).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(0).requiredSize).isEqualTo("value1ForKey1".getBytes().length);
assertThat(results.get(1).requiredSize).isEqualTo("value2ForKey2".getBytes().length);
assertThat(results.get(2).requiredSize).isEqualTo("value3ForKey3".getBytes().length);
assertThat(TestUtil.bufferBytes(results.get(0).value))
.isEqualTo("value1ForKey1".getBytes());
assertThat(TestUtil.bufferBytes(results.get(1).value))
.isEqualTo("value2ForKey2".getBytes());
assertThat(TestUtil.bufferBytes(results.get(2).value))
.isEqualTo("value3ForKey3".getBytes());
}
{
final List<ColumnFamilyHandle> columnFamilyHandles = new ArrayList<>();
columnFamilyHandles.add(db.getDefaultColumnFamily());
columnFamilyHandles.add(cf.get(1));
columnFamilyHandles.add(cf.get(3));
final List<ByteBufferGetStatus> results =
db.multiGetByteBuffers(columnFamilyHandles, keys, values);
assertThat(results.get(0).status.getCode()).isEqualTo(Status.Code.NotFound);
assertThat(results.get(1).status.getCode()).isEqualTo(Status.Code.NotFound);
assertThat(results.get(2).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(2).requiredSize).isEqualTo("value3ForKey3".getBytes().length);
assertThat(TestUtil.bufferBytes(results.get(2).value))
.isEqualTo("value3ForKey3".getBytes());
}
}
}
@Test
public void putNThenMultiGetDirectTruncateCF() throws RocksDBException {
try (final Options opt = new Options().setCreateIfMissing(true);
final RocksDB db = RocksDB.open(opt, dbFolder.getRoot().getAbsolutePath())) {
final List<ColumnFamilyDescriptor> cfDescriptors = new ArrayList<>();
cfDescriptors.add(new ColumnFamilyDescriptor("cf0".getBytes()));
final List<ColumnFamilyHandle> cf = db.createColumnFamilies(cfDescriptors);
db.put(cf.get(0), "key1".getBytes(), "value1ForKey1".getBytes());
db.put(cf.get(0), "key2".getBytes(), "value2ForKey2WithLotsOfTrailingGarbage".getBytes());
db.put(cf.get(0), "key3".getBytes(), "value3ForKey3".getBytes());
final List<ByteBuffer> keys = new ArrayList<>();
keys.add(ByteBuffer.allocateDirect(12).put("key1".getBytes()));
keys.add(ByteBuffer.allocateDirect(12).put("key2".getBytes()));
keys.add(ByteBuffer.allocateDirect(12).put("key3".getBytes()));
// Java8 and lower flip() returns Buffer not ByteBuffer, so can't chain above /\/\
for (final ByteBuffer key : keys) {
key.flip();
}
final List<ByteBuffer> values = new ArrayList<>();
for (int i = 0; i < keys.size(); i++) {
values.add(ByteBuffer.allocateDirect(24));
}
{
final List<ColumnFamilyHandle> columnFamilyHandles = new ArrayList<>();
columnFamilyHandles.add(cf.get(0));
final List<ByteBufferGetStatus> results =
db.multiGetByteBuffers(columnFamilyHandles, keys, values);
assertThat(results.get(0).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(1).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(2).status.getCode()).isEqualTo(Status.Code.Ok);
assertThat(results.get(0).requiredSize).isEqualTo("value1ForKey1".getBytes().length);
assertThat(results.get(1).requiredSize)
.isEqualTo("value2ForKey2WithLotsOfTrailingGarbage".getBytes().length);
assertThat(results.get(2).requiredSize).isEqualTo("value3ForKey3".getBytes().length);
assertThat(TestUtil.bufferBytes(results.get(0).value))
.isEqualTo("value1ForKey1".getBytes());
assertThat(TestUtil.bufferBytes(results.get(1).value))
.isEqualTo("valu e2Fo rKey 2Wit hLot sOfT".replace(" ", "").getBytes());
assertThat(TestUtil.bufferBytes(results.get(2).value))
.isEqualTo("value3ForKey3".getBytes());
}
}
}
}

19
java/src/test/java/org/rocksdb/util/TestUtil.java
View File

@ -5,14 +5,14 @@
package org.rocksdb.util;
import static java.nio.charset.StandardCharsets.UTF_8;
import java.nio.ByteBuffer;
import java.util.Random;
import org.rocksdb.CompactionPriority;
import org.rocksdb.Options;
import org.rocksdb.WALRecoveryMode;
import java.util.Random;
import static java.nio.charset.StandardCharsets.UTF_8;
/**
* General test utilities.
*/
@ -58,4 +58,15 @@ public class TestUtil {
random.nextBytes(str);
return str;
}
/**
* Copy a {@link ByteBuffer} into an array for shorthand ease of test coding
* @param byteBuffer the buffer to copy
* @return a {@link byte[]} containing the same bytes as the input
*/
public static byte[] bufferBytes(final ByteBuffer byteBuffer) {
final byte[] result = new byte[byteBuffer.limit()];
byteBuffer.get(result);
return result;
}
}