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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.documentapi.messagebus.protocol.test.storagepolicy;
import com.yahoo.collections.Pair;
import com.yahoo.document.DocumentId;
import com.yahoo.document.DocumentTypeManager;
import com.yahoo.document.DocumentTypeManagerConfigurer;
import com.yahoo.documentapi.messagebus.protocol.DocumentProtocol;
import com.yahoo.documentapi.messagebus.protocol.DocumentProtocolRoutingPolicy;
import com.yahoo.documentapi.messagebus.protocol.SlobrokPolicy;
import com.yahoo.documentapi.messagebus.protocol.RemoveDocumentMessage;
import com.yahoo.documentapi.messagebus.protocol.RoutingPolicyFactory;
import com.yahoo.documentapi.messagebus.protocol.ContentPolicy;
import com.yahoo.documentapi.messagebus.protocol.WrongDistributionReply;
import com.yahoo.documentapi.messagebus.protocol.test.PolicyTestFrame;
import com.yahoo.messagebus.EmptyReply;
import com.yahoo.messagebus.Message;
import com.yahoo.messagebus.Reply;
import com.yahoo.messagebus.routing.HopSpec;
import com.yahoo.messagebus.routing.RoutingContext;
import com.yahoo.messagebus.routing.RoutingNode;
import com.yahoo.text.Utf8Array;
import com.yahoo.vdslib.distribution.Distribution;
import com.yahoo.vdslib.distribution.RandomGen;
import org.junit.After;
import org.junit.Before;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNotSame;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
public abstract class ContentPolicyTestEnvironment {
protected ContentPolicyTestFactory policyFactory;
protected PolicyTestFrame frame;
private Set<Integer> nodes;
protected static int[] bucketOneNodePreference = new int[]{ 3, 5, 7, 6, 8, 0, 9, 2, 1, 4 };
protected boolean debug = false;
@Before
public void setUp() throws Exception {
DocumentTypeManager manager = new DocumentTypeManager();
DocumentTypeManagerConfigurer.configure(manager, "file:./test/cfg/testdoc.cfg");
frame = new PolicyTestFrame(manager);
nodes = new TreeSet<>();
DocumentProtocol protocol = (DocumentProtocol) frame.getMessageBus().getProtocol((Utf8Array)DocumentProtocol.NAME);
policyFactory = new ContentPolicyTestFactory(nodes);
protocol.putRoutingPolicyFactory("storage", policyFactory);
frame.setMessage(createMessage("id:ns:testdoc:n=1:foo"));
frame.setHop(new HopSpec("test", "[storage:cluster=foo]"));
}
@After
public void tearDown() {
frame.destroy();
}
protected static Message createMessage(String id) {
Message msg = new RemoveDocumentMessage(new DocumentId(id));
msg.getTrace().setLevel(9);
return msg;
}
protected void setClusterNodes(int[] ints) {
Set<Integer> clusterNodes = new TreeSet<>();
for (int i=0; i<ints.length; ++i) clusterNodes.add(ints[i]);
nodes.clear();
nodes.addAll(clusterNodes);
}
private static Pair<String, String> extractClusterAndIndexFromPattern(String pattern) {
String[] bits = pattern.split("/");
if (bits.length < 4) throw new IllegalStateException("Invalid pattern '" + pattern + "'. Expected more parts in it.");
String distributor = bits[3];
String cluster = bits[1];
if (cluster.indexOf('.') < 0) throw new IllegalStateException("Expected . in cluster spec '" + cluster + "'.");
cluster = cluster.substring(cluster.indexOf('.') + 1);
return new Pair<>(cluster, distributor);
}
protected static Pair<String, Integer> getAddress(RoutingNode node) {
Pair<String, String> pair = extractClusterAndIndexFromPattern(node.getRoute().getHop(0).toString());
return new Pair<>(pair.getFirst(), Integer.valueOf(pair.getSecond()));
}
protected RoutingNode select() {
List<RoutingNode> result = frame.select(1);
assertEquals(1, result.size());
return result.get(0);
}
protected void addNode(int index) {
nodes.add(index);
}
protected void removeNode(int second) {
assertTrue(nodes.remove(second));
}
public static class TestHostFetcher extends ContentPolicy.HostFetcher {
private final String clusterName;
private final RandomGen randomizer = new RandomGen(1234);
private final Set<Integer> nodes;
private Integer avoidPickingAtRandom = null;
public TestHostFetcher(String clusterName, Set<Integer> nodes) {
super(60);
this.clusterName = clusterName;
this.nodes = nodes;
}
public void setAvoidPickingAtRandom(Integer index) { avoidPickingAtRandom = index; }
@Override
public String getTargetSpec(Integer distributor, RoutingContext context) {
try{
if (distributor == null) {
if (nodes.size() == 1) {
assertNotSame(avoidPickingAtRandom, nodes.iterator().next());
distributor = nodes.iterator().next();
} else {
Iterator<Integer> it = nodes.iterator();
for (int i = 0, n = randomizer.nextInt(nodes.size() - 1); i<n; ++i) it.next();
distributor = it.next();
if (avoidPickingAtRandom != null && avoidPickingAtRandom.equals(distributor))
distributor = it.next();
}
}
if (nodes.contains(distributor)) {
return "storage/cluster." + clusterName + "/distributor/" + distributor;
} else {
return null;
}
} catch (RuntimeException e) {
e.printStackTrace();
throw new AssertionError(e.getMessage());
}
}
}
public static class TestWrappingInstabilityChecker implements ContentPolicy.InstabilityChecker {
public int recordedFailures = 0;
private final ContentPolicy.InstabilityChecker fwdChecker;
TestWrappingInstabilityChecker(ContentPolicy.InstabilityChecker fwdChecker) {
this.fwdChecker = fwdChecker;
}
@Override
public boolean tooManyFailures(int nodeIndex) {
return fwdChecker.tooManyFailures(nodeIndex);
}
@Override
public void addFailure(Integer calculatedDistributor) {
++recordedFailures;
fwdChecker.addFailure(calculatedDistributor);
}
}
public static class TestParameters extends ContentPolicy.Parameters {
private final TestHostFetcher hostFetcher;
private final Distribution distribution;
public final TestWrappingInstabilityChecker instabilityChecker;
public TestParameters(String parameters, Set<Integer> nodes) {
super(SlobrokPolicy.parse(parameters));
hostFetcher = new TestHostFetcher(getClusterName(), nodes);
distribution = new Distribution(Distribution.getDefaultDistributionConfig(2, 10));
instabilityChecker = new TestWrappingInstabilityChecker(new ContentPolicy.PerNodeCountingInstabilityChecker(5));
}
@Override
public ContentPolicy.HostFetcher createHostFetcher(SlobrokPolicy policy, int percent) { return hostFetcher; }
@Override
public Distribution createDistribution(SlobrokPolicy policy) { return distribution; }
@Override
public ContentPolicy.InstabilityChecker createInstabilityChecker() { return instabilityChecker; }
}
public static class ContentPolicyTestFactory implements RoutingPolicyFactory {
private Set<Integer> nodes;
private final LinkedList<TestParameters> parameterInstances = new LinkedList<>();
private Integer avoidPickingAtRandom = null;
public ContentPolicyTestFactory(Set<Integer> nodes) {
this.nodes = nodes;
}
public DocumentProtocolRoutingPolicy createPolicy(String parameters) {
parameterInstances.addLast(new TestParameters(parameters, nodes));
((TestHostFetcher) parameterInstances.getLast().createHostFetcher(null, 60)).setAvoidPickingAtRandom(avoidPickingAtRandom);
return new ContentPolicy(parameterInstances.getLast());
}
public void avoidPickingAtRandom(Integer distributor) {
avoidPickingAtRandom = distributor;
for (TestParameters params : parameterInstances) {
((TestHostFetcher) params.createHostFetcher(null, 60)).setAvoidPickingAtRandom(avoidPickingAtRandom);
}
}
public TestParameters getLastParameters() { return parameterInstances.getLast(); }
}
private int findPreferredAvailableNodeForTestBucket() {
for (int i=0; i<10; ++i) {
if (nodes.contains(bucketOneNodePreference[i])) return bucketOneNodePreference[i];
}
throw new IllegalStateException("Found no node available");
}
protected void sendToCorrectNode(String cluster, int correctNode) {
RoutingNode target = select();
target.handleReply(new EmptyReply());
Reply reply = frame.getReceptor().getReply(60);
assertNotNull(reply);
assertFalse(reply.hasErrors());
assertEquals(reply.getTrace().toString(), "storage/cluster." + cluster + "/distributor/" + correctNode, target.getRoute().getHop(0).toString());
}
protected void replyWrongDistribution(RoutingNode target, String cluster, Integer randomNode, String clusterState) {
// We want test to send to wrong node when sending to random. If distribution changes so the first random
// node picked is the same node we should alter test
if (randomNode != null) {
assertFalse(randomNode == findPreferredAvailableNodeForTestBucket());
}
target.handleReply(new WrongDistributionReply(clusterState));
Reply reply = frame.getReceptor().getReply(60);
assertNotNull(reply);
assertFalse(reply.hasErrors());
// Verify that we sent to expected node
if (randomNode != null) {
assertEquals(reply.getTrace().toString(), "storage/cluster." + cluster + "/distributor/" + randomNode, target.getRoute().getHop(0).toString());
}
if (debug) System.err.println("WRONG DISTRIBUTION: " + reply.getTrace());
}
protected void replyOk(RoutingNode target) {
target.handleReply(new EmptyReply());
Reply reply = frame.getReceptor().getReply(60);
assertNotNull(reply);
assertFalse(reply.hasErrors());
if (debug) System.err.println("OK: " + reply.getTrace());
}
protected void replyError(RoutingNode target, com.yahoo.messagebus.Error error) {
EmptyReply reply = new EmptyReply();
reply.addError(error);
target.handleReply(reply);
assertTrue(reply == frame.getReceptor().getReply(60));
assertTrue(reply.hasErrors());
if (debug) System.err.println("ERROR: " + reply.getTrace());
}
}
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