/*
* 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.loadtests.direct.stealing;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import org.apache.ignite.cluster.ClusterNode;
import org.apache.ignite.compute.ComputeJob;
import org.apache.ignite.compute.ComputeJobResult;
import org.apache.ignite.compute.ComputeTaskAdapter;
import org.apache.ignite.compute.ComputeTaskSession;
import org.apache.ignite.resources.TaskSessionResource;
/**
* Stealing load test task.
*/
public class GridStealingLoadTestTask extends ComputeTaskAdapter<UUID, Integer> {
/** */
@TaskSessionResource
private ComputeTaskSession taskSes;
/** */
private UUID stealingNodeId;
/** */
private int stolenJobs;
/** {@inheritDoc} */
@Override public Map<? extends ComputeJob, ClusterNode> map(List<ClusterNode> subgrid, UUID arg) {
assert arg != null;
assert subgrid.size() > 1: "Test requires at least 2 nodes. One with load and another one to steal.";
int jobsNum = subgrid.size();
Map<GridStealingLoadTestJob, ClusterNode> map = new HashMap<>(jobsNum);
stealingNodeId = arg;
Iterator<ClusterNode> iter = subgrid.iterator();
Collection<UUID> assigned = new ArrayList<>(subgrid.size());
for (int i = 0; i < jobsNum; i++) {
ClusterNode node = null;
boolean nextNodeFound = false;
while (iter.hasNext() && !nextNodeFound) {
node = iter.next();
// Do not map jobs to the stealing node.
if (!node.id().equals(stealingNodeId))
nextNodeFound = true;
// Recycle iterator.
if (!iter.hasNext())
iter = subgrid.iterator();
}
assert node != null;
assigned.add(node.id());
map.put(new GridStealingLoadTestJob(), node);
}
taskSes.setAttribute("nodes", assigned);
return map;
}
/** {@inheritDoc} */
@Override public Integer reduce(List<ComputeJobResult> results) {
assert results != null;
for (ComputeJobResult res : results) {
if (res.getData() != null && stealingNodeId.equals(res.getData()))
stolenJobs++;
}
return stolenJobs;
}
}