/*
* Copyright (C) 2012-2015 DataStax 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.datastax.driver.core;
import com.datastax.driver.core.policies.LoadBalancingPolicy;
import com.google.common.collect.Iterators;
import org.testng.annotations.Test;
import java.net.InetAddress;
import java.util.Collection;
import java.util.Iterator;
import static com.datastax.driver.core.CreateCCM.TestMode.PER_METHOD;
import static org.testng.Assert.assertTrue;
// Test that PoolingOpions.refreshConnectedHosts works as expected (JAVA-309)
@CreateCCM(PER_METHOD)
public class LoadBalancingPolicyRefreshTest extends CCMTestsSupport {
UpdatablePolicy policy;
private class UpdatablePolicy implements LoadBalancingPolicy {
private Cluster cluster;
private Host theHost;
public void changeTheHost(Host theNewHost) {
this.theHost = theNewHost;
cluster.getConfiguration().getPoolingOptions().refreshConnectedHosts();
}
public void init(Cluster cluster, Collection<Host> hosts) {
this.cluster = cluster;
try {
for (Host h : hosts)
if (h.getAddress().equals(InetAddress.getByName(TestUtils.IP_PREFIX + '1')))
this.theHost = h;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public HostDistance distance(Host host) {
return host == theHost ? HostDistance.LOCAL : HostDistance.IGNORED;
}
public Iterator<Host> newQueryPlan(String loggedKeyspace, Statement statement) {
return Iterators.<Host>singletonIterator(theHost);
}
public void onAdd(Host h) {
}
public void onRemove(Host h) {
}
public void onUp(Host h) {
}
public void onDown(Host h) {
}
public void close() {
}
}
@Test(groups = "short")
@CCMConfig(numberOfNodes = 2, clusterProvider = "updatablePolicy")
public void refreshTest() throws Throwable {
// Ugly
Host[] hosts = new Host[2];
for (Host h : cluster().getMetadata().getAllHosts()) {
if (h.getAddress().equals(ccm().addressOfNode(1).getAddress()))
hosts[0] = h;
else
hosts[1] = h;
}
assertTrue(session().getState().getConnectedHosts().contains(hosts[0]), "Connected hosts: " + session().getState().getConnectedHosts());
assertTrue(!session().getState().getConnectedHosts().contains(hosts[1]), "Connected hosts: " + session().getState().getConnectedHosts());
policy.changeTheHost(hosts[1]);
assertTrue(!session().getState().getConnectedHosts().contains(hosts[0]), "Connected hosts: " + session().getState().getConnectedHosts());
assertTrue(session().getState().getConnectedHosts().contains(hosts[1]), "Connected hosts: " + session().getState().getConnectedHosts());
}
@SuppressWarnings("unused")
private Cluster.Builder updatablePolicy() {
policy = new UpdatablePolicy();
return Cluster.builder().withLoadBalancingPolicy(policy);
}
}