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8c4a3bfa5b
Summary: * [java] Add a java api for rocksdb::Options, currently only supports create_if_missing. * [java] Add a test for RocksDBException in RocksDBSample. Test Plan: make jtest Reviewers: haobo, sdong Reviewed By: haobo CC: leveldb, dhruba Differential Revision: https://reviews.facebook.net/D17385
70 lines
2.0 KiB
Java
70 lines
2.0 KiB
Java
// 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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package org.rocksdb;
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/**
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* Options to control the behavior of a database. It will be used
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* during the creation of a RocksDB (i.e., RocksDB::Open()).
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*
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* Note that dispose() must be called before an Options instance
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* become out-of-scope to release the allocated memory in c++.
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*/
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public class Options {
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/**
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* Construct options for opening a RocksDB.
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*
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* This constructor will create (by allocating a block of memory)
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* an rocksdb::Options in the c++ side.
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*/
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public Options() {
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nativeHandle_ = 0;
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newOptions();
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}
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/**
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* If this value is set to true, then the database will be created
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* if it is missing during RocksDB::Open().
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* Default: false
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*
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* @param flag a flag indicating whether to create a database the
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* specified database in RocksDB::Open() operation is missing.
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* @see RocksDB::Open()
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*/
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public void setCreateIfMissing(boolean flag) {
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assert(nativeHandle_ != 0);
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setCreateIfMissing(nativeHandle_, flag);
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}
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/**
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* Return true if the create_if_missing flag is set to true.
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* If true, the database will be created if it is missing.
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*
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* @return return true if the create_if_missing flag is set to true.
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* @see setCreateIfMissing()
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*/
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public boolean craeteIfMissing() {
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assert(nativeHandle_ != 0);
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return createIfMissing(nativeHandle_);
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}
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/**
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* Release the memory allocated for the current instance
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* in the c++ side.
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*/
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public synchronized void dispose() {
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if (nativeHandle_ != 0) {
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dispose0();
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}
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}
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private native void newOptions();
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private native void dispose0();
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private native void setCreateIfMissing(long handle, boolean flag);
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private native boolean createIfMissing(long handle);
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long nativeHandle_;
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}
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