/*
* 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.ignite.spi.loadbalancing.adaptive;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.UUID;
import org.apache.ignite.GridTestJob;
import org.apache.ignite.GridTestTaskSession;
import org.apache.ignite.cluster.ClusterNode;
import org.apache.ignite.lang.IgniteUuid;
import org.apache.ignite.testframework.GridSpiTestContext;
import org.apache.ignite.testframework.GridTestNode;
import org.apache.ignite.testframework.junits.spi.GridSpiAbstractTest;
import org.apache.ignite.testframework.junits.spi.GridSpiTest;
import org.apache.ignite.testframework.junits.spi.GridSpiTestConfig;
/**
* Tests adaptive load balancing SPI.
*/
@GridSpiTest(spi = AdaptiveLoadBalancingSpi.class, group = "Load Balancing SPI")
public class GridAdaptiveLoadBalancingSpiMultipleNodeSelfTest extends GridSpiAbstractTest<AdaptiveLoadBalancingSpi> {
/** */
private static final int RMT_NODE_CNT = 10;
/** {@inheritDoc} */
@Override protected GridSpiTestContext initSpiContext() throws Exception {
GridSpiTestContext ctx = super.initSpiContext();
for (int i = 0; i < RMT_NODE_CNT; i++) {
GridTestNode node = new GridTestNode(UUID.randomUUID());
node.setAttribute("load", (double)(i + 1));
ctx.addNode(node);
}
return ctx;
}
/**
* @return {@code True} if node weights should be considered.
*/
@GridSpiTestConfig
public AdaptiveLoadProbe getLoadProbe() {
return new AdaptiveLoadProbe() {
@Override public double getLoad(ClusterNode node, int jobsSentSinceLastUpdate) {
boolean isFirstTime = node.attribute("used") == null;
assert isFirstTime ? jobsSentSinceLastUpdate == 0 : jobsSentSinceLastUpdate > 0;
return (Double)node.attribute("load");
}
};
}
/**
* @throws Exception If failed.
*/
public void testWeights() throws Exception {
// Seal it.
List<ClusterNode> nodes = new ArrayList<>(getSpiContext().remoteNodes());
int[] cnts = new int[RMT_NODE_CNT];
// Invoke load balancer a large number of times, so statistics won't lie.
for (int i = 0; i < 50000; i++) {
GridTestNode node = (GridTestNode)getSpi().getBalancedNode(new GridTestTaskSession(IgniteUuid.randomUuid()),
nodes, new GridTestJob());
int idx = ((Double)node.attribute("load")).intValue() - 1;
if (cnts[idx] == 0)
node.setAttribute("used", true);
// Increment number of times a node was picked.
cnts[idx]++;
}
info("Node counts: " + Arrays.toString(cnts));
for (int i = 0; i < cnts.length - 1; i++) {
assert cnts[i] > cnts[i + 1] : "Invalid node counts for index [idx=" + i + ", cnts[i]=" + cnts[i] +
", cnts[i+1]=" + cnts[i + 1] + ']';
}
}
}