mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-27 11:43:49 +00:00
385 lines
12 KiB
C++
385 lines
12 KiB
C++
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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// This file is designed for caching those frequently used IDs and provide
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// efficient portal (i.e, a set of static functions) to access java code
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// from c++.
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#ifndef JAVA_ROCKSJNI_PORTAL_H_
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#define JAVA_ROCKSJNI_PORTAL_H_
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#include <jni.h>
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#include "rocksdb/db.h"
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#include "rocksdb/filter_policy.h"
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#include "utilities/backupable_db.h"
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namespace rocksdb {
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// The portal class for org.rocksdb.RocksDB
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class RocksDBJni {
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public:
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// Get the java class id of org.rocksdb.RocksDB.
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static jclass getJClass(JNIEnv* env) {
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jclass jclazz = env->FindClass("org/rocksdb/RocksDB");
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assert(jclazz != nullptr);
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return jclazz;
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}
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// Get the field id of the member variable of org.rocksdb.RocksDB
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// that stores the pointer to rocksdb::DB.
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static jfieldID getHandleFieldID(JNIEnv* env) {
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static jfieldID fid = env->GetFieldID(
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getJClass(env), "nativeHandle_", "J");
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assert(fid != nullptr);
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return fid;
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}
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// Get the pointer to rocksdb::DB of the specified org.rocksdb.RocksDB.
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static rocksdb::DB* getHandle(JNIEnv* env, jobject jdb) {
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return reinterpret_cast<rocksdb::DB*>(
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env->GetLongField(jdb, getHandleFieldID(env)));
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}
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// Pass the rocksdb::DB pointer to the java side.
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static void setHandle(JNIEnv* env, jobject jdb, rocksdb::DB* db) {
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env->SetLongField(
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jdb, getHandleFieldID(env),
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reinterpret_cast<jlong>(db));
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}
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};
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// The portal class for org.rocksdb.RocksDBException
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class RocksDBExceptionJni {
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public:
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// Get the jclass of org.rocksdb.RocksDBException
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static jclass getJClass(JNIEnv* env) {
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jclass jclazz = env->FindClass("org/rocksdb/RocksDBException");
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assert(jclazz != nullptr);
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return jclazz;
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}
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// Create and throw a java exception by converting the input
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// Status to an RocksDBException.
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//
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// In case s.ok() is true, then this function will not throw any
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// exception.
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static void ThrowNew(JNIEnv* env, Status s) {
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if (s.ok()) {
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return;
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}
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jstring msg = env->NewStringUTF(s.ToString().c_str());
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// get the constructor id of org.rocksdb.RocksDBException
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static jmethodID mid = env->GetMethodID(
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getJClass(env), "<init>", "(Ljava/lang/String;)V");
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assert(mid != nullptr);
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env->Throw((jthrowable)env->NewObject(getJClass(env), mid, msg));
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}
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};
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class OptionsJni {
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public:
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// Get the java class id of org.rocksdb.Options.
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static jclass getJClass(JNIEnv* env) {
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jclass jclazz = env->FindClass("org/rocksdb/Options");
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assert(jclazz != nullptr);
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return jclazz;
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}
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// Get the field id of the member variable of org.rocksdb.Options
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// that stores the pointer to rocksdb::Options
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static jfieldID getHandleFieldID(JNIEnv* env) {
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static jfieldID fid = env->GetFieldID(
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getJClass(env), "nativeHandle_", "J");
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assert(fid != nullptr);
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return fid;
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}
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// Get the pointer to rocksdb::Options
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static rocksdb::Options* getHandle(JNIEnv* env, jobject jobj) {
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return reinterpret_cast<rocksdb::Options*>(
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env->GetLongField(jobj, getHandleFieldID(env)));
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}
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// Pass the rocksdb::Options pointer to the java side.
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static void setHandle(JNIEnv* env, jobject jobj, rocksdb::Options* op) {
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env->SetLongField(
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jobj, getHandleFieldID(env),
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reinterpret_cast<jlong>(op));
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}
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};
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class WriteOptionsJni {
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public:
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// Get the java class id of org.rocksdb.WriteOptions.
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static jclass getJClass(JNIEnv* env) {
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jclass jclazz = env->FindClass("org/rocksdb/WriteOptions");
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assert(jclazz != nullptr);
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return jclazz;
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}
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// Get the field id of the member variable of org.rocksdb.WriteOptions
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// that stores the pointer to rocksdb::WriteOptions
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static jfieldID getHandleFieldID(JNIEnv* env) {
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static jfieldID fid = env->GetFieldID(
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getJClass(env), "nativeHandle_", "J");
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assert(fid != nullptr);
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return fid;
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}
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// Get the pointer to rocksdb::WriteOptions
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static rocksdb::WriteOptions* getHandle(JNIEnv* env, jobject jobj) {
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return reinterpret_cast<rocksdb::WriteOptions*>(
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env->GetLongField(jobj, getHandleFieldID(env)));
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}
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// Pass the rocksdb::WriteOptions pointer to the java side.
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static void setHandle(JNIEnv* env, jobject jobj, rocksdb::WriteOptions* op) {
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env->SetLongField(
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jobj, getHandleFieldID(env),
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reinterpret_cast<jlong>(op));
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}
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};
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class ReadOptionsJni {
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public:
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// Get the java class id of org.rocksdb.ReadOptions.
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static jclass getJClass(JNIEnv* env) {
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jclass jclazz = env->FindClass("org/rocksdb/ReadOptions");
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assert(jclazz != nullptr);
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return jclazz;
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}
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// Get the field id of the member variable of org.rocksdb.ReadOptions
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// that stores the pointer to rocksdb::ReadOptions
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static jfieldID getHandleFieldID(JNIEnv* env) {
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static jfieldID fid = env->GetFieldID(
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getJClass(env), "nativeHandle_", "J");
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assert(fid != nullptr);
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return fid;
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}
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// Get the pointer to rocksdb::ReadOptions
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static rocksdb::ReadOptions* getHandle(JNIEnv* env, jobject jobj) {
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return reinterpret_cast<rocksdb::ReadOptions*>(
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env->GetLongField(jobj, getHandleFieldID(env)));
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}
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// Pass the rocksdb::ReadOptions pointer to the java side.
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static void setHandle(JNIEnv* env, jobject jobj,
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rocksdb::ReadOptions* op) {
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env->SetLongField(
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jobj, getHandleFieldID(env),
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reinterpret_cast<jlong>(op));
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}
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};
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class WriteBatchJni {
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public:
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static jclass getJClass(JNIEnv* env) {
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jclass jclazz = env->FindClass("org/rocksdb/WriteBatch");
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assert(jclazz != nullptr);
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return jclazz;
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}
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static jfieldID getHandleFieldID(JNIEnv* env) {
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static jfieldID fid = env->GetFieldID(
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getJClass(env), "nativeHandle_", "J");
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assert(fid != nullptr);
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return fid;
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}
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// Get the pointer to rocksdb::WriteBatch of the specified
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// org.rocksdb.WriteBatch.
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static rocksdb::WriteBatch* getHandle(JNIEnv* env, jobject jwb) {
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return reinterpret_cast<rocksdb::WriteBatch*>(
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env->GetLongField(jwb, getHandleFieldID(env)));
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}
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// Pass the rocksdb::WriteBatch pointer to the java side.
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static void setHandle(JNIEnv* env, jobject jwb, rocksdb::WriteBatch* wb) {
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env->SetLongField(
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jwb, getHandleFieldID(env),
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reinterpret_cast<jlong>(wb));
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}
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};
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class HistogramDataJni {
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public:
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static jmethodID getConstructorMethodId(JNIEnv* env, jclass jclazz) {
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jmethodID mid = env->GetMethodID(
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jclazz, "<init>", "(DDDDD)V");
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assert(mid != nullptr);
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return mid;
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}
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};
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class BackupableDBOptionsJni {
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public:
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// Get the java class id of org.rocksdb.BackupableDBOptions.
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static jclass getJClass(JNIEnv* env) {
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jclass jclazz = env->FindClass("org/rocksdb/BackupableDBOptions");
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assert(jclazz != nullptr);
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return jclazz;
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}
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// Get the field id of the member variable of org.rocksdb.BackupableDBOptions
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// that stores the pointer to rocksdb::BackupableDBOptions
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static jfieldID getHandleFieldID(JNIEnv* env) {
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static jfieldID fid = env->GetFieldID(
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getJClass(env), "nativeHandle_", "J");
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assert(fid != nullptr);
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return fid;
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}
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// Get the pointer to rocksdb::BackupableDBOptions
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static rocksdb::BackupableDBOptions* getHandle(JNIEnv* env, jobject jobj) {
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return reinterpret_cast<rocksdb::BackupableDBOptions*>(
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env->GetLongField(jobj, getHandleFieldID(env)));
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}
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// Pass the rocksdb::BackupableDBOptions pointer to the java side.
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static void setHandle(
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JNIEnv* env, jobject jobj, rocksdb::BackupableDBOptions* op) {
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env->SetLongField(
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jobj, getHandleFieldID(env),
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reinterpret_cast<jlong>(op));
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}
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};
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class IteratorJni {
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public:
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// Get the java class id of org.rocksdb.Iteartor.
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static jclass getJClass(JNIEnv* env) {
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jclass jclazz = env->FindClass("org/rocksdb/RocksIterator");
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assert(jclazz != nullptr);
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return jclazz;
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}
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// Get the field id of the member variable of org.rocksdb.Iterator
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// that stores the pointer to rocksdb::Iterator.
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static jfieldID getHandleFieldID(JNIEnv* env) {
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static jfieldID fid = env->GetFieldID(
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getJClass(env), "nativeHandle_", "J");
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assert(fid != nullptr);
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return fid;
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}
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// Get the pointer to rocksdb::Iterator.
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static rocksdb::Iterator* getHandle(JNIEnv* env, jobject jobj) {
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return reinterpret_cast<rocksdb::Iterator*>(
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env->GetLongField(jobj, getHandleFieldID(env)));
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}
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// Pass the rocksdb::Iterator pointer to the java side.
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static void setHandle(
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JNIEnv* env, jobject jobj, rocksdb::Iterator* op) {
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env->SetLongField(
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jobj, getHandleFieldID(env),
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reinterpret_cast<jlong>(op));
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}
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};
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class FilterJni {
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public:
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// Get the java class id of org.rocksdb.FilterPolicy.
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static jclass getJClass(JNIEnv* env) {
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jclass jclazz = env->FindClass("org/rocksdb/Filter");
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assert(jclazz != nullptr);
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return jclazz;
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}
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// Get the field id of the member variable of org.rocksdb.Filter
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// that stores the pointer to rocksdb::FilterPolicy.
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static jfieldID getHandleFieldID(JNIEnv* env) {
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static jfieldID fid = env->GetFieldID(
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getJClass(env), "nativeHandle_", "J");
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assert(fid != nullptr);
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return fid;
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}
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// Get the pointer to rocksdb::FilterPolicy.
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static rocksdb::FilterPolicy* getHandle(JNIEnv* env, jobject jobj) {
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return reinterpret_cast<rocksdb::FilterPolicy*>(
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env->GetLongField(jobj, getHandleFieldID(env)));
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}
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// Pass the rocksdb::FilterPolicy pointer to the java side.
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static void setHandle(
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JNIEnv* env, jobject jobj, const rocksdb::FilterPolicy* op) {
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env->SetLongField(
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jobj, getHandleFieldID(env),
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reinterpret_cast<jlong>(op));
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}
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};
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class ListJni {
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public:
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// Get the java class id of java.util.List.
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static jclass getListClass(JNIEnv* env) {
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jclass jclazz = env->FindClass("java/util/List");
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assert(jclazz != nullptr);
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return jclazz;
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}
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// Get the java class id of java.util.ArrayList.
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static jclass getArrayListClass(JNIEnv* env) {
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jclass jclazz = env->FindClass("java/util/ArrayList");
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assert(jclazz != nullptr);
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return jclazz;
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}
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// Get the java class id of java.util.Iterator.
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static jclass getIteratorClass(JNIEnv* env) {
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jclass jclazz = env->FindClass("java/util/Iterator");
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assert(jclazz != nullptr);
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return jclazz;
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}
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// Get the java method id of java.util.List.iterator().
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static jmethodID getIteratorMethod(JNIEnv* env) {
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static jmethodID mid = env->GetMethodID(
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getListClass(env), "iterator", "()Ljava/util/Iterator;");
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assert(mid != nullptr);
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return mid;
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}
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// Get the java method id of java.util.Iterator.hasNext().
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static jmethodID getHasNextMethod(JNIEnv* env) {
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static jmethodID mid = env->GetMethodID(
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getIteratorClass(env), "hasNext", "()Z");
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assert(mid != nullptr);
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return mid;
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}
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// Get the java method id of java.util.Iterator.next().
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static jmethodID getNextMethod(JNIEnv* env) {
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static jmethodID mid = env->GetMethodID(
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getIteratorClass(env), "next", "()Ljava/lang/Object;");
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assert(mid != nullptr);
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return mid;
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}
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// Get the java method id of arrayList constructor.
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static jmethodID getArrayListConstructorMethodId(JNIEnv* env, jclass jclazz) {
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static jmethodID mid = env->GetMethodID(
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jclazz, "<init>", "(I)V");
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assert(mid != nullptr);
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return mid;
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}
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// Get the java method id of java.util.List.add().
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static jmethodID getListAddMethodId(JNIEnv* env) {
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static jmethodID mid = env->GetMethodID(
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getListClass(env), "add", "(Ljava/lang/Object;)Z");
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assert(mid != nullptr);
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return mid;
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}
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};
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} // namespace rocksdb
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#endif // JAVA_ROCKSJNI_PORTAL_H_
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