// Copyright (c) 2014, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
package org.rocksdb.test;
import org.junit.ClassRule;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import org.rocksdb.WriteBatch;
import java.io.UnsupportedEncodingException;
import static org.assertj.core.api.Assertions.assertThat;
/**
* This class mimics the db/write_batch_test.cc
* in the c++ rocksdb library.
*
* Not ported yet:
*
* Continue();
* PutGatherSlices();
*/
public class WriteBatchTest {
@ClassRule
public static final RocksMemoryResource rocksMemoryResource =
new RocksMemoryResource();
@Rule
public TemporaryFolder dbFolder = new TemporaryFolder();
@Test
public void emptyWriteBatch() {
WriteBatch batch = new WriteBatch();
assertThat(batch.count()).isEqualTo(0);
}
@Test
public void multipleBatchOperations()
throws UnsupportedEncodingException {
WriteBatch batch = new WriteBatch();
batch.put("foo".getBytes("US-ASCII"), "bar".getBytes("US-ASCII"));
batch.remove("box".getBytes("US-ASCII"));
batch.put("baz".getBytes("US-ASCII"), "boo".getBytes("US-ASCII"));
WriteBatchInternal.setSequence(batch, 100);
assertThat(WriteBatchInternal.sequence(batch)).
isNotNull().
isEqualTo(100);
assertThat(batch.count()).isEqualTo(3);
assertThat(new String(getContents(batch), "US-ASCII")).
isEqualTo("Put(baz, boo)@102" +
"Delete(box)@101" +
"Put(foo, bar)@100");
}
@Test
public void testAppendOperation()
throws UnsupportedEncodingException {
WriteBatch b1 = new WriteBatch();
WriteBatch b2 = new WriteBatch();
WriteBatchInternal.setSequence(b1, 200);
WriteBatchInternal.setSequence(b2, 300);
WriteBatchInternal.append(b1, b2);
assertThat(getContents(b1).length).isEqualTo(0);
assertThat(b1.count()).isEqualTo(0);
b2.put("a".getBytes("US-ASCII"), "va".getBytes("US-ASCII"));
WriteBatchInternal.append(b1, b2);
assertThat("Put(a, va)@200".equals(new String(getContents(b1), "US-ASCII")));
assertThat(b1.count()).isEqualTo(1);
b2.clear();
b2.put("b".getBytes("US-ASCII"), "vb".getBytes("US-ASCII"));
WriteBatchInternal.append(b1, b2);
assertThat(("Put(a, va)@200" +
"Put(b, vb)@201")
.equals(new String(getContents(b1), "US-ASCII")));
assertThat(b1.count()).isEqualTo(2);
b2.remove("foo".getBytes("US-ASCII"));
WriteBatchInternal.append(b1, b2);
assertThat(("Put(a, va)@200" +
"Put(b, vb)@202" +
"Put(b, vb)@201" +
"Delete(foo)@203")
.equals(new String(getContents(b1), "US-ASCII")));
assertThat(b1.count()).isEqualTo(4);
}
@Test
public void blobOperation()
throws UnsupportedEncodingException {
WriteBatch batch = new WriteBatch();
batch.put("k1".getBytes("US-ASCII"), "v1".getBytes("US-ASCII"));
batch.put("k2".getBytes("US-ASCII"), "v2".getBytes("US-ASCII"));
batch.put("k3".getBytes("US-ASCII"), "v3".getBytes("US-ASCII"));
batch.putLogData("blob1".getBytes("US-ASCII"));
batch.remove("k2".getBytes("US-ASCII"));
batch.putLogData("blob2".getBytes("US-ASCII"));
batch.merge("foo".getBytes("US-ASCII"), "bar".getBytes("US-ASCII"));
assertThat(batch.count()).isEqualTo(5);
assertThat(("Merge(foo, bar)@4" +
"Put(k1, v1)@0" +
"Delete(k2)@3" +
"Put(k2, v2)@1" +
"Put(k3, v3)@2")
.equals(new String(getContents(batch), "US-ASCII")));
}
static native byte[] getContents(WriteBatch batch);
}
/**
* Package-private class which provides java api to access
* c++ WriteBatchInternal.
*/
class WriteBatchInternal {
static native void setSequence(WriteBatch batch, long sn);
static native long sequence(WriteBatch batch);
static native void append(WriteBatch b1, WriteBatch b2);
}