| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.cassandra.service.pager; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| |
| import org.apache.cassandra.Util; |
| import org.apache.cassandra.config.DatabaseDescriptor; |
| import org.apache.cassandra.transport.ProtocolVersion; |
| import org.apache.cassandra.utils.ByteBufferUtil; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| public class PagingStateTest |
| { |
| @BeforeClass |
| public static void setupDD() |
| { |
| DatabaseDescriptor.daemonInitialization(); |
| } |
| |
| @Test |
| public void testSerializationBackwardCompatibility() |
| { |
| /* |
| * Tests that the serialized paging state for the native protocol V3 is backward compatible |
| * with what old nodes generate. For that, it compares the serialized format to the hard-coded |
| * value of the same state generated on a 2.1. For the curious, said hardcoded value has been |
| * generated by the following code: |
| * ByteBuffer pk = ByteBufferUtil.bytes("someKey"); |
| * CellName cn = CellNames.compositeSparse(new ByteBuffer[]{ ByteBufferUtil.bytes("c1"), ByteBufferUtil.bytes(42) }, |
| * new ColumnIdentifier("myCol", false), |
| * false); |
| * PagingState state = new PagingState(pk, cn.toByteBuffer(), 10); |
| * System.out.println("PagingState = " + ByteBufferUtil.bytesToHex(state.serialize())); |
| */ |
| PagingState state = Util.makeSomePagingState(ProtocolVersion.V3); |
| |
| String serializedState = ByteBufferUtil.bytesToHex(state.serialize(ProtocolVersion.V3)); |
| // Note that we don't assert exact equality because we know 3.0 nodes include the "remainingInPartition" number |
| // that is not present on 2.1/2.2 nodes. We know this is ok however because we know that 2.1/2.2 nodes will ignore |
| // anything remaining once they have properly deserialized a paging state. |
| assertTrue(serializedState.startsWith("0007736f6d654b65790014000263310000040000002a0000056d79636f6c000000000a")); |
| } |
| |
| @Test |
| public void testSerializeV3DeserializeV3() |
| { |
| PagingState state = Util.makeSomePagingState(ProtocolVersion.V3); |
| ByteBuffer serialized = state.serialize(ProtocolVersion.V3); |
| assertEquals(serialized.remaining(), state.serializedSize(ProtocolVersion.V3)); |
| assertEquals(state, PagingState.deserialize(serialized, ProtocolVersion.V3)); |
| } |
| |
| @Test |
| public void testSerializeV4DeserializeV4() |
| { |
| PagingState state = Util.makeSomePagingState(ProtocolVersion.V4); |
| ByteBuffer serialized = state.serialize(ProtocolVersion.V4); |
| assertEquals(serialized.remaining(), state.serializedSize(ProtocolVersion.V4)); |
| assertEquals(state, PagingState.deserialize(serialized, ProtocolVersion.V4)); |
| } |
| |
| @Test |
| public void testSerializeV3DeserializeV4() |
| { |
| PagingState state = Util.makeSomePagingState(ProtocolVersion.V3); |
| ByteBuffer serialized = state.serialize(ProtocolVersion.V3); |
| assertEquals(serialized.remaining(), state.serializedSize(ProtocolVersion.V3)); |
| assertEquals(state, PagingState.deserialize(serialized, ProtocolVersion.V4)); |
| } |
| |
| @Test |
| public void testSerializeV4DeserializeV3() |
| { |
| PagingState state = Util.makeSomePagingState(ProtocolVersion.V4); |
| ByteBuffer serialized = state.serialize(ProtocolVersion.V4); |
| assertEquals(serialized.remaining(), state.serializedSize(ProtocolVersion.V4)); |
| assertEquals(state, PagingState.deserialize(serialized, ProtocolVersion.V3)); |
| } |
| |
| @Test |
| public void testSerializeV3WithoutRemainingInPartitionDeserializeV3() throws IOException |
| { |
| PagingState state = Util.makeSomePagingState(ProtocolVersion.V3, Integer.MAX_VALUE); |
| ByteBuffer serialized = state.legacySerialize(false); |
| assertEquals(serialized.remaining(), state.legacySerializedSize(false)); |
| assertEquals(state, PagingState.deserialize(serialized, ProtocolVersion.V3)); |
| } |
| |
| @Test |
| public void testSerializeV3WithoutRemainingInPartitionDeserializeV4() throws IOException |
| { |
| PagingState state = Util.makeSomePagingState(ProtocolVersion.V3, Integer.MAX_VALUE); |
| ByteBuffer serialized = state.legacySerialize(false); |
| assertEquals(serialized.remaining(), state.legacySerializedSize(false)); |
| assertEquals(state, PagingState.deserialize(serialized, ProtocolVersion.V4)); |
| } |
| } |