org.rocksdb.Checkpoint Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of rocksdbjni Show documentation
Show all versions of rocksdbjni Show documentation
RocksDB fat jar that contains .so files for linux32 and linux64 (glibc and musl-libc), jnilib files
for Mac OSX, and a .dll for Windows x64.
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
package org.rocksdb;
/**
* Provides Checkpoint functionality. Checkpoints
* provide persistent snapshots of RocksDB databases.
*/
public class Checkpoint extends RocksObject {
/**
* Creates a Checkpoint object to be used for creating open-able
* snapshots.
*
* @param db {@link RocksDB} instance.
* @return a Checkpoint instance.
*
* @throws java.lang.IllegalArgumentException if {@link RocksDB}
* instance is null.
* @throws java.lang.IllegalStateException if {@link RocksDB}
* instance is not initialized.
*/
public static Checkpoint create(final RocksDB db) {
if (db == null) {
throw new IllegalArgumentException(
"RocksDB instance shall not be null.");
} else if (!db.isOwningHandle()) {
throw new IllegalStateException(
"RocksDB instance must be initialized.");
}
return new Checkpoint(db);
}
/**
* Builds an open-able snapshot of RocksDB on the same disk, which
* accepts an output directory on the same disk, and under the directory
* (1) hard-linked SST files pointing to existing live SST files
* (2) a copied manifest files and other files
*
* @param checkpointPath path to the folder where the snapshot is going
* to be stored.
* @throws RocksDBException thrown if an error occurs within the native
* part of the library.
*/
public void createCheckpoint(final String checkpointPath)
throws RocksDBException {
createCheckpoint(nativeHandle_, checkpointPath);
}
public ExportImportFilesMetaData exportColumnFamily(final ColumnFamilyHandle columnFamilyHandle,
final String exportPath) throws RocksDBException {
return new ExportImportFilesMetaData(
exportColumnFamily(nativeHandle_, columnFamilyHandle.nativeHandle_, exportPath));
}
private Checkpoint(final RocksDB db) {
super(newCheckpoint(db.nativeHandle_));
}
private static native long newCheckpoint(long dbHandle);
@Override protected final native void disposeInternal(final long handle);
private native void createCheckpoint(long handle, String checkpointPath)
throws RocksDBException;
private native long exportColumnFamily(long handle, long columnFamilyHandle, String exportPath)
throws RocksDBException;
}