/*
* Copyright (c) 2008-2014 MongoDB, Inc.
*
* Licensed 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 com.mongodb.selector;
import com.mongodb.ServerAddress;
import com.mongodb.connection.ClusterDescription;
import com.mongodb.connection.ClusterSettings;
import com.mongodb.connection.ServerDescription;
import com.mongodb.connection.ServerSettings;
import org.junit.Before;
import org.junit.Test;
import java.net.UnknownHostException;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import static com.mongodb.ReadPreference.secondary;
import static com.mongodb.connection.ClusterConnectionMode.MULTIPLE;
import static com.mongodb.connection.ClusterType.REPLICA_SET;
import static com.mongodb.connection.ServerConnectionState.CONNECTED;
import static com.mongodb.connection.ServerType.REPLICA_SET_PRIMARY;
import static com.mongodb.connection.ServerType.REPLICA_SET_SECONDARY;
import static java.util.Arrays.asList;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
public class CompositeServerSelectorTest {
private CompositeServerSelector selector;
private ServerDescription second;
private ServerDescription first;
private ServerDescription third;
@Before
public void setUp() throws UnknownHostException {
first = ServerDescription.builder()
.state(CONNECTED)
.address(new ServerAddress())
.ok(true)
.roundTripTime(5, MILLISECONDS)
.type(REPLICA_SET_PRIMARY)
.build();
second = ServerDescription.builder()
.state(CONNECTED)
.address(new ServerAddress("localhost:27018"))
.ok(true)
.roundTripTime(30, MILLISECONDS)
.type(REPLICA_SET_SECONDARY)
.build();
third = ServerDescription.builder()
.state(CONNECTED)
.address(new ServerAddress("localhost:27019"))
.ok(true)
.roundTripTime(35, MILLISECONDS)
.type(REPLICA_SET_SECONDARY)
.build();
}
@Test
public void shouldApplyServerSelectorsInOrder() {
selector = new CompositeServerSelector(asList(new ReadPreferenceServerSelector(secondary()),
new LatencyMinimizingServerSelector(15, MILLISECONDS)));
assertEquals(selector.select(new ClusterDescription(MULTIPLE, REPLICA_SET, asList(first, second, third))), asList(second, third));
}
@Test
public void shouldCollapseNestedComposite() {
CompositeServerSelector composedSelector =
new CompositeServerSelector(asList(new ReadPreferenceServerSelector(secondary()),
new LatencyMinimizingServerSelector(15, MILLISECONDS)));
selector = new CompositeServerSelector(Arrays.<ServerSelector>asList(composedSelector));
assertEquals(selector.select(new ClusterDescription(MULTIPLE, REPLICA_SET, asList(first, second, third))), asList(second, third));
}
@Test
public void shouldPassOnClusterDescriptionWithCorrectServersAndSettings() {
TestServerSelector firstSelector = new TestServerSelector();
TestServerSelector secondSelector = new TestServerSelector();
CompositeServerSelector composedSelector = new CompositeServerSelector(asList(firstSelector, secondSelector));
composedSelector.select(new ClusterDescription(MULTIPLE, REPLICA_SET, asList(first, second, third),
ClusterSettings.builder().hosts(asList(new ServerAddress())).build(),
ServerSettings.builder().build()));
assertTrue(secondSelector.clusterDescription.getServerDescriptions().isEmpty());
assertNotNull(secondSelector.clusterDescription.getClusterSettings());
assertNotNull(secondSelector.clusterDescription.getServerSettings());
}
static class TestServerSelector implements ServerSelector {
private ClusterDescription clusterDescription;
@Override
public List<ServerDescription> select(final ClusterDescription clusterDescription) {
this.clusterDescription = clusterDescription;
return Collections.emptyList();
}
}
}