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package com.yahoo.search.dispatch.searchcluster;
import com.yahoo.container.QrSearchersConfig;
import com.yahoo.container.handler.ClustersStatus;
import com.yahoo.container.handler.VipStatus;
import com.yahoo.net.HostName;
import com.yahoo.prelude.Pong;
import com.yahoo.search.cluster.ClusterMonitor;
import com.yahoo.search.dispatch.MockSearchCluster;
import com.yahoo.search.result.ErrorMessage;
import org.junit.Test;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.atomic.AtomicInteger;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
/**
* @author baldersheim
*/
public class SearchClusterTest {
static class State {
final String clusterId;
final int nodesPerGroup;
final VipStatus vipStatus;
final SearchCluster searchCluster;
final List<AtomicInteger> numDocsPerNode;
List<AtomicInteger> pingCounts;
State(String clusterId, int nodesPergroup, String ... nodeNames) {
this(clusterId, nodesPergroup, Arrays.asList(nodeNames));
}
State(String clusterId, int nodesPergroup, List<String> nodeNames) {
this.clusterId = clusterId;
this.nodesPerGroup = nodesPergroup;
vipStatus = new VipStatus(new QrSearchersConfig.Builder().searchcluster(new QrSearchersConfig.Searchcluster.Builder().name(clusterId)).build(), new ClustersStatus());
numDocsPerNode = new ArrayList<>(nodeNames.size());
pingCounts = new ArrayList<>(nodeNames.size());
List<Node> nodes = new ArrayList<>(nodeNames.size());
for (String name : nodeNames) {
int key = nodes.size() % nodesPergroup;
int group = nodes.size() / nodesPergroup;
nodes.add(new Node(key, name, 13333, group));
numDocsPerNode.add(new AtomicInteger(1));
pingCounts.add(new AtomicInteger(0));
}
searchCluster = new SearchCluster(clusterId, MockSearchCluster.createDispatchConfig(nodes), nodes.size() / nodesPergroup, vipStatus);
}
void startMonitoring() {
searchCluster.startClusterMonitoring(new Factory(nodesPerGroup, numDocsPerNode, pingCounts));
}
private static int getMaxValue(List<AtomicInteger> list) {
int max = list.get(0).get();
for (AtomicInteger v : list) {
if (v.get() > max) {
max = v.get();
}
}
return max;
}
private static int getMinValue(List<AtomicInteger> list) {
int min = list.get(0).get();
for (AtomicInteger v : list) {
if (v.get() < min) {
min = v.get();
}
}
return min;
}
private static void waitAtLeast(int atLeast, List<AtomicInteger> list) {
while (getMinValue(list) < atLeast) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {}
}
}
void waitOneFullPingRound() {
waitAtLeast(getMaxValue(pingCounts) + 1, pingCounts);
}
static class Factory implements PingFactory {
static class Pinger implements Callable<Pong> {
private final AtomicInteger numDocs;
private final AtomicInteger pingCount;
Pinger(AtomicInteger numDocs, AtomicInteger pingCount) {
this.numDocs = numDocs;
this.pingCount = pingCount;
}
@Override
public Pong call() throws Exception {
int docs = numDocs.get();
pingCount.incrementAndGet();
return (docs < 0)
? new Pong(ErrorMessage.createBackendCommunicationError("Negative numDocs = " + docs))
: new Pong(docs);
}
}
private final List<AtomicInteger> activeDocs;
private final List<AtomicInteger> pingCounts;
private final int numPerGroup;
Factory(int numPerGroup, List<AtomicInteger> activeDocs, List<AtomicInteger> pingCounts) {
this.numPerGroup = numPerGroup;
this.activeDocs = activeDocs;
this.pingCounts = pingCounts;
}
@Override
public Callable<Pong> createPinger(Node node, ClusterMonitor<Node> monitor) {
int index = node.group*numPerGroup + node.key();
return new Pinger(activeDocs.get(index), pingCounts.get(index));
}
}
}
@Test
public void requireThatVipStatusIsDefaultDownButComesUpAfterPinging() {
State test = new State("cluster.1", 2, "a", "b");
assertTrue(test.searchCluster.localCorpusDispatchTarget().isEmpty());
assertFalse(test.vipStatus.isInRotation());
test.startMonitoring();
test.waitOneFullPingRound();
assertTrue(test.vipStatus.isInRotation());
}
@Test
public void requireThatZeroDocsAreFine() {
State test = new State("cluster.1", 2,"a", "b");
test.startMonitoring();
test.waitOneFullPingRound();
assertTrue(test.vipStatus.isInRotation());
assertTrue(test.searchCluster.localCorpusDispatchTarget().isEmpty());
test.numDocsPerNode.get(0).set(-1);
test.numDocsPerNode.get(1).set(-1);
test.waitOneFullPingRound();
assertFalse(test.vipStatus.isInRotation());
test.numDocsPerNode.get(0).set(0);
test.waitOneFullPingRound();
assertTrue(test.vipStatus.isInRotation());
}
@Test
public void requireThatVipStatusIsDefaultDownWithLocalDispatch() {
State test = new State("cluster.1", 1, HostName.getLocalhost(), "b");
assertTrue(test.searchCluster.localCorpusDispatchTarget().isPresent());
assertFalse(test.vipStatus.isInRotation());
test.startMonitoring();
test.waitOneFullPingRound();
assertTrue(test.vipStatus.isInRotation());
}
@Test
public void requireThatVipStatusDownWhenLocalIsDown() {
State test = new State("cluster.1",1,HostName.getLocalhost(), "b");
test.startMonitoring();
test.waitOneFullPingRound();
assertTrue(test.vipStatus.isInRotation());
assertTrue(test.searchCluster.localCorpusDispatchTarget().isPresent());
test.waitOneFullPingRound();
assertTrue(test.vipStatus.isInRotation());
test.numDocsPerNode.get(0).set(-1);
test.waitOneFullPingRound();
assertFalse(test.vipStatus.isInRotation());
test.numDocsPerNode.get(0).set(1);
test.waitOneFullPingRound();
assertTrue(test.vipStatus.isInRotation());
test.numDocsPerNode.get(1).set(-1);
test.waitOneFullPingRound();
assertTrue(test.vipStatus.isInRotation());
test.numDocsPerNode.get(0).set(-1);
test.numDocsPerNode.get(1).set(-1);
test.waitOneFullPingRound();
assertFalse(test.vipStatus.isInRotation());
test.numDocsPerNode.get(1).set(1);
test.waitOneFullPingRound();
assertFalse(test.vipStatus.isInRotation());
test.numDocsPerNode.get(0).set(1);
test.waitOneFullPingRound();
assertTrue(test.vipStatus.isInRotation());
}
private void verifyThatVipStatusDownRequireAllNodesDown(int numGroups, int nodesPerGroup) {
List<String> nodeNames = generateNodeNames(numGroups, nodesPerGroup);
State test = new State("cluster.1", nodesPerGroup, nodeNames);
test.startMonitoring();
test.waitOneFullPingRound();
assertTrue(test.vipStatus.isInRotation());
assertTrue(test.searchCluster.localCorpusDispatchTarget().isEmpty());
test.waitOneFullPingRound();
assertTrue(test.vipStatus.isInRotation());
for (int i=0; i < test.numDocsPerNode.size()-1; i++) {
test.numDocsPerNode.get(i).set(-1);
}
test.waitOneFullPingRound();
assertTrue(test.vipStatus.isInRotation());
test.numDocsPerNode.get(test.numDocsPerNode.size()-1).set(-1);
test.waitOneFullPingRound();
assertFalse(test.vipStatus.isInRotation());
}
@Test
public void requireThatVipStatusDownRequireAllNodesDown() {
verifyThatVipStatusDownRequireAllNodesDown(1,2);
verifyThatVipStatusDownRequireAllNodesDown(3, 3);
}
static private List<String> generateNodeNames(int numGroups, int nodesPerGroup) {
List<String> nodeNames = new ArrayList<>(numGroups*nodesPerGroup);
for (int g = 0; g < numGroups; g++) {
for (int n=0; n < nodesPerGroup; n++) {
nodeNames.add(new StringBuilder("node.").append(g).append('.').append(n).toString());
}
}
return nodeNames;
}
private void verifyThatVipStatusUpRequireOnlyOneOnlineNode(int numGroups, int nodesPerGroup) {
List<String> nodeNames = generateNodeNames(numGroups, nodesPerGroup);
State test = new State("cluster.1", nodesPerGroup, nodeNames);
test.startMonitoring();
test.waitOneFullPingRound();
assertTrue(test.vipStatus.isInRotation());
assertTrue(test.searchCluster.localCorpusDispatchTarget().isEmpty());
for (int i=0; i < test.numDocsPerNode.size()-1; i++) {
test.numDocsPerNode.get(i).set(-1);
}
test.waitOneFullPingRound();
assertTrue(test.vipStatus.isInRotation());
test.numDocsPerNode.get(test.numDocsPerNode.size()-1).set(-1);
test.waitOneFullPingRound();
assertFalse(test.vipStatus.isInRotation());
test.numDocsPerNode.get(0).set(0);
test.waitOneFullPingRound();
assertTrue(test.vipStatus.isInRotation());
}
@Test
public void requireThatVipStatusUpRequireOnlyOneOnlineNode() {
verifyThatVipStatusUpRequireOnlyOneOnlineNode(1, 2);
verifyThatVipStatusUpRequireOnlyOneOnlineNode(3, 3);
}
}
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