Yueh-Hsuan Chiang
10 years ago
commit
625e162c69
@ -0,0 +1,51 @@ |
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package org.rocksdb; |
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|
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/** |
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* FlushOptions to be passed to flush operations of |
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* {@link org.rocksdb.RocksDB}. |
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*/ |
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public class FlushOptions extends RocksObject { |
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|
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/** |
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* Construct a new instance of FlushOptions. |
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*/ |
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public FlushOptions(){ |
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super(); |
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newFlushOptions(); |
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} |
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|
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/** |
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* Set if the flush operation shall block until it terminates. |
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* |
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* @param waitForFlush boolean value indicating if the flush |
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* operations waits for termination of the flush process. |
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* |
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* @return instance of current FlushOptions. |
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*/ |
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public FlushOptions setWaitForFlush(boolean waitForFlush) { |
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assert(isInitialized()); |
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waitForFlush(nativeHandle_); |
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return this; |
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} |
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|
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/** |
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* Wait for flush to finished. |
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* |
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* @return boolean value indicating if the flush operation |
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* waits for termination of the flush process. |
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*/ |
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public boolean waitForFlush() { |
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assert(isInitialized()); |
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return waitForFlush(nativeHandle_); |
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} |
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@Override protected void disposeInternal() { |
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disposeInternal(nativeHandle_); |
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} |
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private native void newFlushOptions(); |
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private native void disposeInternal(long handle); |
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private native void setWaitForFlush(long handle, |
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boolean wait); |
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private native boolean waitForFlush(long handle); |
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} |
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@ -0,0 +1,47 @@ |
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// 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.test; |
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import org.rocksdb.*; |
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public class FlushTest { |
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static final String db_path = "/tmp/rocksdbjni_flush_test"; |
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static { |
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RocksDB.loadLibrary(); |
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} |
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public static void main(String[] args) { |
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RocksDB db = null; |
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Options options = new Options(); |
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WriteOptions wOpt = new WriteOptions(); |
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FlushOptions flushOptions = new FlushOptions(); |
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try { |
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// Setup options
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options.setCreateIfMissing(true); |
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options.setMaxWriteBufferNumber(10); |
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options.setMinWriteBufferNumberToMerge(10); |
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flushOptions.setWaitForFlush(true); |
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wOpt.setDisableWAL(true); |
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db = RocksDB.open(options, db_path); |
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db.put(wOpt, "key1".getBytes(), "value1".getBytes()); |
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db.put(wOpt, "key2".getBytes(), "value2".getBytes()); |
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db.put(wOpt, "key3".getBytes(), "value3".getBytes()); |
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db.put(wOpt, "key4".getBytes(), "value4".getBytes()); |
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assert(db.getProperty("rocksdb.num-entries-active-mem-table").equals("4")); |
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db.flush(flushOptions); |
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assert(db.getProperty("rocksdb.num-entries-active-mem-table").equals("0")); |
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} catch (RocksDBException e) { |
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assert(false); |
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} |
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db.close(); |
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options.dispose(); |
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wOpt.dispose(); |
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flushOptions.dispose(); |
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} |
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} |
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