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* ownership. Elasticsearch 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
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package org.elasticsearch.discovery;
import org.apache.lucene.util.IOUtils;
import org.elasticsearch.Version;
import org.elasticsearch.cluster.routing.allocation.AllocationService;
import org.elasticsearch.cluster.service.ClusterApplier;
import org.elasticsearch.cluster.service.MasterService;
import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
import org.elasticsearch.common.network.NetworkService;
import org.elasticsearch.common.settings.ClusterSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.discovery.zen.UnicastHostsProvider;
import org.elasticsearch.discovery.zen.ZenDiscovery;
import org.elasticsearch.plugins.DiscoveryPlugin;
import org.elasticsearch.test.ESTestCase;
import org.elasticsearch.test.NoopDiscovery;
import org.elasticsearch.test.transport.MockTransportService;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
import org.junit.After;
import org.junit.Before;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.function.Supplier;
import static org.mockito.Mockito.mock;
public class DiscoveryModuleTests extends ESTestCase {
private TransportService transportService;
private NamedWriteableRegistry namedWriteableRegistry;
private MasterService masterService;
private ClusterApplier clusterApplier;
private ThreadPool threadPool;
private ClusterSettings clusterSettings;
public interface DummyHostsProviderPlugin extends DiscoveryPlugin {
Map<String, Supplier<UnicastHostsProvider>> impl();
@Override
default Map<String, Supplier<UnicastHostsProvider>> getZenHostsProviders(TransportService transportService,
NetworkService networkService) {
return impl();
}
}
public interface DummyDiscoveryPlugin extends DiscoveryPlugin {
Map<String, Supplier<Discovery>> impl();
@Override
default Map<String, Supplier<Discovery>> getDiscoveryTypes(ThreadPool threadPool, TransportService transportService,
NamedWriteableRegistry namedWriteableRegistry,
MasterService masterService, ClusterApplier clusterApplier,
ClusterSettings clusterSettings, UnicastHostsProvider hostsProvider,
AllocationService allocationService) {
return impl();
}
}
@Before
public void setupDummyServices() {
transportService = MockTransportService.createNewService(Settings.EMPTY, Version.CURRENT, null, null);
masterService = mock(MasterService.class);
namedWriteableRegistry = new NamedWriteableRegistry(Collections.emptyList());
clusterApplier = mock(ClusterApplier.class);
threadPool = mock(ThreadPool.class);
clusterSettings = new ClusterSettings(Settings.EMPTY, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS);
}
@After
public void clearDummyServices() throws IOException {
IOUtils.close(transportService);
}
private DiscoveryModule newModule(Settings settings, List<DiscoveryPlugin> plugins) {
return new DiscoveryModule(settings, threadPool, transportService, namedWriteableRegistry, null, masterService,
clusterApplier, clusterSettings, plugins, null);
}
public void testDefaults() {
DiscoveryModule module = newModule(Settings.EMPTY, Collections.emptyList());
assertTrue(module.getDiscovery() instanceof ZenDiscovery);
}
public void testLazyConstructionDiscovery() {
DummyDiscoveryPlugin plugin = () -> Collections.singletonMap("custom",
() -> { throw new AssertionError("created discovery type which was not selected"); });
newModule(Settings.EMPTY, Collections.singletonList(plugin));
}
public void testRegisterDiscovery() {
Settings settings = Settings.builder().put(DiscoveryModule.DISCOVERY_TYPE_SETTING.getKey(), "custom").build();
DummyDiscoveryPlugin plugin = () -> Collections.singletonMap("custom", NoopDiscovery::new);
DiscoveryModule module = newModule(settings, Collections.singletonList(plugin));
assertTrue(module.getDiscovery() instanceof NoopDiscovery);
}
public void testUnknownDiscovery() {
Settings settings = Settings.builder().put(DiscoveryModule.DISCOVERY_TYPE_SETTING.getKey(), "dne").build();
IllegalArgumentException e = expectThrows(IllegalArgumentException.class, () ->
newModule(settings, Collections.emptyList()));
assertEquals("Unknown discovery type [dne]", e.getMessage());
}
public void testDuplicateDiscovery() {
DummyDiscoveryPlugin plugin1 = () -> Collections.singletonMap("dup", () -> null);
DummyDiscoveryPlugin plugin2 = () -> Collections.singletonMap("dup", () -> null);
IllegalArgumentException e = expectThrows(IllegalArgumentException.class, () ->
newModule(Settings.EMPTY, Arrays.asList(plugin1, plugin2)));
assertEquals("Cannot register discovery type [dup] twice", e.getMessage());
}
public void testHostsProvider() {
Settings settings = Settings.builder().put(DiscoveryModule.DISCOVERY_HOSTS_PROVIDER_SETTING.getKey(), "custom").build();
final UnicastHostsProvider provider = Collections::emptyList;
AtomicBoolean created = new AtomicBoolean(false);
DummyHostsProviderPlugin plugin = () -> Collections.singletonMap("custom", () -> {
created.set(true);
return Collections::emptyList;
});
newModule(settings, Collections.singletonList(plugin));
assertTrue(created.get());
}
public void testUnknownHostsProvider() {
Settings settings = Settings.builder().put(DiscoveryModule.DISCOVERY_HOSTS_PROVIDER_SETTING.getKey(), "dne").build();
IllegalArgumentException e = expectThrows(IllegalArgumentException.class, () ->
newModule(settings, Collections.emptyList()));
assertEquals("Unknown zen hosts provider [dne]", e.getMessage());
}
public void testDuplicateHostsProvider() {
DummyHostsProviderPlugin plugin1 = () -> Collections.singletonMap("dup", () -> null);
DummyHostsProviderPlugin plugin2 = () -> Collections.singletonMap("dup", () -> null);
IllegalArgumentException e = expectThrows(IllegalArgumentException.class, () ->
newModule(Settings.EMPTY, Arrays.asList(plugin1, plugin2)));
assertEquals("Cannot register zen hosts provider [dup] twice", e.getMessage());
}
public void testLazyConstructionHostsProvider() {
DummyHostsProviderPlugin plugin = () -> Collections.singletonMap("custom",
() -> { throw new AssertionError("created hosts provider which was not selected"); });
newModule(Settings.EMPTY, Collections.singletonList(plugin));
}
}