mirror of https://github.com/apache/cassandra
103 lines
3.4 KiB
Java
103 lines
3.4 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.cassandra.journal;
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import java.io.IOException;
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import java.nio.file.Files;
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import java.util.Collections;
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import org.junit.BeforeClass;
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import org.junit.Test;
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import org.apache.cassandra.config.DatabaseDescriptor;
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import org.apache.cassandra.io.util.DataInputPlus;
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import org.apache.cassandra.io.util.DataOutputPlus;
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import org.apache.cassandra.io.util.File;
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import org.apache.cassandra.utils.TimeUUID;
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import static org.junit.Assert.assertEquals;
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import static org.apache.cassandra.utils.TimeUUID.Generator.nextTimeUUID;
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public class JournalTest
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{
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@BeforeClass
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public static void setUp()
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{
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DatabaseDescriptor.daemonInitialization();
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}
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@Test
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public void testSimpleReadWrite() throws IOException
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{
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File directory = new File(Files.createTempDirectory("JournalTest"));
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directory.deleteRecursiveOnExit();
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Journal<TimeUUID, Long> journal =
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new Journal<>("TestJournal", directory, TestParams.INSTANCE, TimeUUIDKeySupport.INSTANCE, LongSerializer.INSTANCE);
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journal.start();
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TimeUUID id1 = nextTimeUUID();
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TimeUUID id2 = nextTimeUUID();
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TimeUUID id3 = nextTimeUUID();
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TimeUUID id4 = nextTimeUUID();
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journal.write(id1, 1L, Collections.singleton(1));
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journal.write(id2, 2L, Collections.singleton(1));
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journal.write(id3, 3L, Collections.singleton(1));
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journal.write(id4, 4L, Collections.singleton(1));
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assertEquals(1L, (long) journal.read(id1));
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assertEquals(2L, (long) journal.read(id2));
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assertEquals(3L, (long) journal.read(id3));
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assertEquals(4L, (long) journal.read(id4));
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journal.shutdown();
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journal = new Journal<>("TestJournal", directory, TestParams.INSTANCE, TimeUUIDKeySupport.INSTANCE, LongSerializer.INSTANCE);
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journal.start();
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assertEquals(1L, (long) journal.read(id1));
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assertEquals(2L, (long) journal.read(id2));
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assertEquals(3L, (long) journal.read(id3));
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assertEquals(4L, (long) journal.read(id4));
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journal.shutdown();
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}
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static class LongSerializer implements ValueSerializer<TimeUUID, Long>
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{
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static final LongSerializer INSTANCE = new LongSerializer();
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public int serializedSize(Long value, int userVersion)
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{
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return Long.BYTES;
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}
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public void serialize(Long value, DataOutputPlus out, int userVersion) throws IOException
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{
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out.writeLong(value);
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}
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public Long deserialize(TimeUUID key, DataInputPlus in, int userVersion) throws IOException
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{
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return in.readLong();
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}
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}
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}
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