| /* |
| * 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.batchlog; |
| |
| import java.net.UnknownHostException; |
| import java.util.Collection; |
| import java.util.Collections; |
| |
| import com.google.common.collect.ImmutableMultimap; |
| import com.google.common.collect.Multimap; |
| import org.junit.Test; |
| |
| import org.apache.cassandra.locator.InetAddressAndPort; |
| import org.apache.cassandra.locator.ReplicaPlans; |
| |
| import static org.hamcrest.CoreMatchers.is; |
| import static org.junit.Assert.assertThat; |
| import static org.junit.Assert.assertTrue; |
| |
| public class BatchlogEndpointFilterTest |
| { |
| private static final String LOCAL = "local"; |
| |
| @Test |
| public void shouldSelect2HostsFromNonLocalRacks() throws UnknownHostException |
| { |
| Multimap<String, InetAddressAndPort> endpoints = ImmutableMultimap.<String, InetAddressAndPort> builder() |
| .put(LOCAL, InetAddressAndPort.getByName("0")) |
| .put(LOCAL, InetAddressAndPort.getByName("00")) |
| .put("1", InetAddressAndPort.getByName("1")) |
| .put("1", InetAddressAndPort.getByName("11")) |
| .put("2", InetAddressAndPort.getByName("2")) |
| .put("2", InetAddressAndPort.getByName("22")) |
| .build(); |
| Collection<InetAddressAndPort> result = filterBatchlogEndpoints(endpoints); |
| assertThat(result.size(), is(2)); |
| assertTrue(result.contains(InetAddressAndPort.getByName("11"))); |
| assertTrue(result.contains(InetAddressAndPort.getByName("22"))); |
| } |
| |
| @Test |
| public void shouldSelectLastHostsFromLastNonLocalRacks() throws UnknownHostException |
| { |
| Multimap<String, InetAddressAndPort> endpoints = ImmutableMultimap.<String, InetAddressAndPort> builder() |
| .put(LOCAL, InetAddressAndPort.getByName("00")) |
| .put("1", InetAddressAndPort.getByName("11")) |
| .put("2", InetAddressAndPort.getByName("2")) |
| .put("2", InetAddressAndPort.getByName("22")) |
| .put("3", InetAddressAndPort.getByName("3")) |
| .put("3", InetAddressAndPort.getByName("33")) |
| .build(); |
| |
| Collection<InetAddressAndPort> result = filterBatchlogEndpoints(endpoints); |
| assertThat(result.size(), is(2)); |
| |
| // result should be the last replicas of the last two racks |
| // (Collections.shuffle has been replaced with Collections.reverse for testing) |
| assertTrue(result.contains(InetAddressAndPort.getByName("22"))); |
| assertTrue(result.contains(InetAddressAndPort.getByName("33"))); |
| } |
| |
| @Test |
| public void shouldSelectHostFromLocal() throws UnknownHostException |
| { |
| Multimap<String, InetAddressAndPort> endpoints = ImmutableMultimap.<String, InetAddressAndPort> builder() |
| .put(LOCAL, InetAddressAndPort.getByName("0")) |
| .put(LOCAL, InetAddressAndPort.getByName("00")) |
| .put("1", InetAddressAndPort.getByName("1")) |
| .build(); |
| Collection<InetAddressAndPort> result = filterBatchlogEndpoints(endpoints); |
| assertThat(result.size(), is(2)); |
| assertTrue(result.contains(InetAddressAndPort.getByName("1"))); |
| assertTrue(result.contains(InetAddressAndPort.getByName("0"))); |
| } |
| |
| @Test |
| public void shouldReturnPassedEndpointForSingleNodeDC() throws UnknownHostException |
| { |
| Multimap<String, InetAddressAndPort> endpoints = ImmutableMultimap.<String, InetAddressAndPort> builder() |
| .put(LOCAL, InetAddressAndPort.getByName("0")) |
| .build(); |
| Collection<InetAddressAndPort> result = filterBatchlogEndpoints(endpoints); |
| assertThat(result.size(), is(1)); |
| assertTrue(result.contains(InetAddressAndPort.getByName("0"))); |
| } |
| |
| @Test |
| public void shouldSelectTwoRandomHostsFromSingleOtherRack() throws UnknownHostException |
| { |
| Multimap<String, InetAddressAndPort> endpoints = ImmutableMultimap.<String, InetAddressAndPort> builder() |
| .put(LOCAL, InetAddressAndPort.getByName("0")) |
| .put(LOCAL, InetAddressAndPort.getByName("00")) |
| .put("1", InetAddressAndPort.getByName("1")) |
| .put("1", InetAddressAndPort.getByName("11")) |
| .put("1", InetAddressAndPort.getByName("111")) |
| .build(); |
| Collection<InetAddressAndPort> result = filterBatchlogEndpoints(endpoints); |
| // result should be the last two non-local replicas |
| // (Collections.shuffle has been replaced with Collections.reverse for testing) |
| assertThat(result.size(), is(2)); |
| assertTrue(result.contains(InetAddressAndPort.getByName("11"))); |
| assertTrue(result.contains(InetAddressAndPort.getByName("111"))); |
| } |
| |
| @Test |
| public void shouldSelectTwoRandomHostsFromSingleRack() throws UnknownHostException |
| { |
| Multimap<String, InetAddressAndPort> endpoints = ImmutableMultimap.<String, InetAddressAndPort> builder() |
| .put(LOCAL, InetAddressAndPort.getByName("1")) |
| .put(LOCAL, InetAddressAndPort.getByName("11")) |
| .put(LOCAL, InetAddressAndPort.getByName("111")) |
| .put(LOCAL, InetAddressAndPort.getByName("1111")) |
| .build(); |
| Collection<InetAddressAndPort> result = filterBatchlogEndpoints(endpoints); |
| // result should be the last two non-local replicas |
| // (Collections.shuffle has been replaced with Collections.reverse for testing) |
| assertThat(result.size(), is(2)); |
| assertTrue(result.contains(InetAddressAndPort.getByName("111"))); |
| assertTrue(result.contains(InetAddressAndPort.getByName("1111"))); |
| } |
| |
| @Test |
| public void shouldSelectOnlyTwoHostsEvenIfLocal() throws UnknownHostException |
| { |
| Multimap<String, InetAddressAndPort> endpoints = ImmutableMultimap.<String, InetAddressAndPort> builder() |
| .put(LOCAL, InetAddressAndPort.getByName("1")) |
| .put(LOCAL, InetAddressAndPort.getByName("11")) |
| .build(); |
| Collection<InetAddressAndPort> result = filterBatchlogEndpoints(endpoints); |
| assertThat(result.size(), is(2)); |
| assertTrue(result.contains(InetAddressAndPort.getByName("1"))); |
| assertTrue(result.contains(InetAddressAndPort.getByName("11"))); |
| } |
| |
| private Collection<InetAddressAndPort> filterBatchlogEndpoints(Multimap<String, InetAddressAndPort> endpoints) |
| { |
| return ReplicaPlans.filterBatchlogEndpoints(LOCAL, endpoints, |
| // Reverse instead of shuffle |
| Collections::reverse, |
| // Always alive |
| (addr) -> true, |
| // Always pick the last |
| (size) -> size - 1); |
| } |
| } |