package org.infinispan.client.hotrod;
import static org.testng.AssertJUnit.assertEquals;
import static org.testng.AssertJUnit.assertNotNull;
import static org.testng.AssertJUnit.assertNotSame;
import static org.testng.AssertJUnit.assertTrue;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.infinispan.client.hotrod.impl.transport.tcp.RoundRobinBalancingStrategy;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
/**
* @author Mircea.Markus@jboss.com
* @since 4.1
*/
@Test (groups = "unit", testName = "client.hotrod.RoundRobinBalancingStrategyTest")
public class RoundRobinBalancingStrategyTest {
SocketAddress addr1 = new InetSocketAddress("localhost",1111);
SocketAddress addr2 = new InetSocketAddress("localhost",2222);
SocketAddress addr3 = new InetSocketAddress("localhost",3333);
SocketAddress addr4 = new InetSocketAddress("localhost",4444);
private List<SocketAddress> defaultServers;
private RoundRobinBalancingStrategy strategy;
@BeforeMethod
public void setUp() {
strategy = new RoundRobinBalancingStrategy();
defaultServers = new ArrayList<SocketAddress>();
defaultServers.add(addr1);
defaultServers.add(addr2);
defaultServers.add(addr3);
strategy.setServers(defaultServers);
}
public void simpleTest() {
assertEquals(addr1, strategy.nextServer(null));
assertEquals(addr2, strategy.nextServer(null));
assertEquals(addr3, strategy.nextServer(null));
assertEquals(addr1, strategy.nextServer(null));
assertEquals(addr2, strategy.nextServer(null));
assertEquals(addr3, strategy.nextServer(null));
assertEquals(addr1, strategy.nextServer(null));
assertEquals(addr2, strategy.nextServer(null));
assertEquals(addr3, strategy.nextServer(null));
}
public void testAddServer() {
List<SocketAddress> newServers = new ArrayList<SocketAddress>(defaultServers);
newServers.add(addr4);
strategy.setServers(newServers);
assertEquals(addr1, strategy.nextServer(null));
assertEquals(addr2, strategy.nextServer(null));
assertEquals(addr3, strategy.nextServer(null));
assertEquals(addr4, strategy.nextServer(null));
assertEquals(addr1, strategy.nextServer(null));
assertEquals(addr2, strategy.nextServer(null));
assertEquals(addr3, strategy.nextServer(null));
assertEquals(addr4, strategy.nextServer(null));
assertEquals(addr1, strategy.nextServer(null));
assertEquals(addr2, strategy.nextServer(null));
assertEquals(addr3, strategy.nextServer(null));
}
public void testRemoveServer() {
List<SocketAddress> newServers = new ArrayList<SocketAddress>(defaultServers);
newServers.remove(addr3);
strategy.setServers(newServers);
assertEquals(addr1, strategy.nextServer(null));
assertEquals(addr2, strategy.nextServer(null));
assertEquals(addr1, strategy.nextServer(null));
assertEquals(addr2, strategy.nextServer(null));
assertEquals(addr1, strategy.nextServer(null));
assertEquals(addr2, strategy.nextServer(null));
}
public void testRemoveServerAfterActivity() {
assertEquals(addr1, strategy.nextServer(null));
assertEquals(addr2, strategy.nextServer(null));
assertEquals(addr3, strategy.nextServer(null));
assertEquals(addr1, strategy.nextServer(null));
assertEquals(addr2, strategy.nextServer(null));
List<SocketAddress> newServers = new ArrayList<SocketAddress>(defaultServers);
newServers.remove(addr3);
strategy.setServers(newServers);
// the next server index is reset to 0 because it would have been out of bounds
assertEquals(addr1, strategy.nextServer(null));
assertEquals(addr2, strategy.nextServer(null));
assertEquals(addr1, strategy.nextServer(null));
assertEquals(addr2, strategy.nextServer(null));
assertEquals(addr1, strategy.nextServer(null));
assertEquals(addr2, strategy.nextServer(null));
}
public void testAddServerAfterActivity() {
assertEquals(addr1, strategy.nextServer(null));
assertEquals(addr2, strategy.nextServer(null));
assertEquals(addr3, strategy.nextServer(null));
assertEquals(addr1, strategy.nextServer(null));
assertEquals(addr2, strategy.nextServer(null));
List<SocketAddress> newServers = new ArrayList<SocketAddress>(defaultServers);
newServers.add(addr4);
strategy.setServers(newServers);
// the next server index is still valid, so it is not reset
assertEquals(addr3, strategy.nextServer(null));
assertEquals(addr4, strategy.nextServer(null));
assertEquals(addr1, strategy.nextServer(null));
assertEquals(addr2, strategy.nextServer(null));
assertEquals(addr3, strategy.nextServer(null));
assertEquals(addr4, strategy.nextServer(null));
assertEquals(addr1, strategy.nextServer(null));
assertEquals(addr2, strategy.nextServer(null));
assertEquals(addr3, strategy.nextServer(null));
assertEquals(addr4, strategy.nextServer(null));
}
public void testFailedServers1() {
strategy.setServers(defaultServers);
Set<SocketAddress> failedServers = Collections.singleton(addr1);
// other servers should be available
final int LOOPS = 10;
int c1 = 0, c2 = 0;
for (int i = 0; i < LOOPS; ++i) {
SocketAddress server = strategy.nextServer(failedServers);
assertNotNull(server);
assertNotSame(addr1, server);
if (server.equals(addr2)) {
c1++;
} else if (server.equals(addr3)) {
c2++;
}
}
assertEquals(LOOPS, c1 + c2);
assertTrue(Math.abs(c1 - c2) <= 1);
}
public void testFailedServers2() {
strategy.setServers(defaultServers);
Set<SocketAddress> failedServers = new HashSet<SocketAddress>(defaultServers);
// with all servers failed, the behaviour should be the same
assertEquals(addr1, strategy.nextServer(failedServers));
assertEquals(addr2, strategy.nextServer(failedServers));
assertEquals(addr3, strategy.nextServer(failedServers));
assertEquals(addr1, strategy.nextServer(failedServers));
}
}