| /* |
| * 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.InetAddress; |
| import java.net.UnknownHostException; |
| import java.util.Collection; |
| import java.util.HashSet; |
| |
| import com.google.common.collect.ImmutableMultimap; |
| import com.google.common.collect.Multimap; |
| import org.junit.Test; |
| import org.junit.matchers.JUnitMatchers; |
| |
| import static org.hamcrest.CoreMatchers.is; |
| import static org.junit.Assert.assertThat; |
| |
| public class BatchlogEndpointFilterTest |
| { |
| private static final String LOCAL = "local"; |
| |
| @Test |
| public void shouldSelect2hostsFromNonLocalRacks() throws UnknownHostException |
| { |
| Multimap<String, InetAddress> endpoints = ImmutableMultimap.<String, InetAddress> builder() |
| .put(LOCAL, InetAddress.getByName("0")) |
| .put(LOCAL, InetAddress.getByName("00")) |
| .put("1", InetAddress.getByName("1")) |
| .put("1", InetAddress.getByName("11")) |
| .put("2", InetAddress.getByName("2")) |
| .put("2", InetAddress.getByName("22")) |
| .build(); |
| Collection<InetAddress> result = new TestEndpointFilter(LOCAL, endpoints).filter(); |
| assertThat(result.size(), is(2)); |
| assertThat(result, JUnitMatchers.hasItem(InetAddress.getByName("11"))); |
| assertThat(result, JUnitMatchers.hasItem(InetAddress.getByName("22"))); |
| } |
| |
| @Test |
| public void shouldSelectHostFromLocal() throws UnknownHostException |
| { |
| Multimap<String, InetAddress> endpoints = ImmutableMultimap.<String, InetAddress> builder() |
| .put(LOCAL, InetAddress.getByName("0")) |
| .put(LOCAL, InetAddress.getByName("00")) |
| .put("1", InetAddress.getByName("1")) |
| .build(); |
| Collection<InetAddress> result = new TestEndpointFilter(LOCAL, endpoints).filter(); |
| assertThat(result.size(), is(2)); |
| assertThat(result, JUnitMatchers.hasItem(InetAddress.getByName("1"))); |
| assertThat(result, JUnitMatchers.hasItem(InetAddress.getByName("0"))); |
| } |
| |
| @Test |
| public void shouldReturnAsIsIfNoEnoughEndpoints() throws UnknownHostException |
| { |
| Multimap<String, InetAddress> endpoints = ImmutableMultimap.<String, InetAddress> builder() |
| .put(LOCAL, InetAddress.getByName("0")) |
| .build(); |
| Collection<InetAddress> result = new TestEndpointFilter(LOCAL, endpoints).filter(); |
| assertThat(result.size(), is(1)); |
| assertThat(result, JUnitMatchers.hasItem(InetAddress.getByName("0"))); |
| } |
| |
| @Test |
| public void shouldSelectTwoRandomHostsFromSingleOtherRack() throws UnknownHostException |
| { |
| Multimap<String, InetAddress> endpoints = ImmutableMultimap.<String, InetAddress> builder() |
| .put(LOCAL, InetAddress.getByName("0")) |
| .put(LOCAL, InetAddress.getByName("00")) |
| .put("1", InetAddress.getByName("1")) |
| .put("1", InetAddress.getByName("11")) |
| .put("1", InetAddress.getByName("111")) |
| .build(); |
| Collection<InetAddress> result = new TestEndpointFilter(LOCAL, endpoints).filter(); |
| // result should contain random two distinct values |
| assertThat(new HashSet<>(result).size(), is(2)); |
| } |
| |
| private static class TestEndpointFilter extends BatchlogManager.EndpointFilter |
| { |
| TestEndpointFilter(String localRack, Multimap<String, InetAddress> endpoints) |
| { |
| super(localRack, endpoints); |
| } |
| |
| @Override |
| protected boolean isValid(InetAddress input) |
| { |
| // We will use always alive non-localhost endpoints |
| return true; |
| } |
| |
| @Override |
| protected int getRandomInt(int bound) |
| { |
| // We don't need random behavior here |
| return bound - 1; |
| } |
| } |
| } |