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Copyright (C) 2011 the original author or authors. See the notice.md file distributed with this work for additional information regarding copyright ownership. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
package org.iq80.leveldb;

Author(s):
Hiram Chirino
public interface DB extends Iterable<Map.Entry<byte[], byte[]>>, Closeable {
    public byte[] get(byte[] keythrows DBException;
    public byte[] get(byte[] keyReadOptions optionsthrows DBException;
    public DBIterator iterator();
    public DBIterator iterator(ReadOptions options);
    public void put(byte[] keybyte[] valuethrows DBException;
    public void delete(byte[] keythrows DBException;
    public void write(WriteBatch updatesthrows DBException;
    public WriteBatch createWriteBatch();

    

Returns:
null if options.isSnapshot()==false otherwise returns a snapshot of the DB after this operation.
    public Snapshot put(byte[] keybyte[] valueWriteOptions optionsthrows DBException;

    

Returns:
null if options.isSnapshot()==false otherwise returns a snapshot of the DB after this operation.
    public Snapshot delete(byte[] keyWriteOptions optionsthrows DBException;

    

Returns:
null if options.isSnapshot()==false otherwise returns a snapshot of the DB after this operation.
    public Snapshot write(WriteBatch updatesWriteOptions optionsthrows DBException;
    public Snapshot getSnapshot();
    public long[] getApproximateSizes(Range ... ranges);
    public String getProperty(String name);

    
Suspends any background compaction threads. This methods returns once the background compactions are suspended.
    public void suspendCompactions() throws InterruptedException;

    
Resumes the background compaction threads.
    public void resumeCompactions();

    
Force a compaction of the specified key range.

Parameters:
begin if null then compaction start from the first key
end if null then compaction ends at the last key
Throws:
DBException
    public void compactRange(byte[] beginbyte[] endthrows DBException;
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