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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vdslib.distribution;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.yahoo.config.subscription.ConfigGetter;
import com.yahoo.document.BucketId;
import com.yahoo.vdslib.state.ClusterState;
import com.yahoo.vdslib.state.NodeType;
import com.yahoo.vespa.config.content.StorDistributionConfig;
import java.util.ArrayList;
import java.util.List;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
// TODO: Use config builder instead of ConfigGetter to create test config.
public class DistributionTestFactory extends CrossPlatformTestFactory {
final ObjectMapper mapper = new ObjectMapper();
private static final String testDirectory = "src/tests/distribution/testdata";
private int redundancy;
private int nodeCount;
private ClusterState state;
private StorDistributionConfig.Builder distributionConfig;
private NodeType nodeType;
private String upStates;
private int testsRecorded = 0;
private final List<Test> results = new ArrayList<>();
private int testsVerified = 0;
enum Failure { NONE, TOO_FEW_BITS, NO_DISTRIBUTORS_AVAILABLE }
static public class Test {
private final BucketId bucket;
private final List<Integer> nodes;
private Failure failure;
public Test(BucketId bucket) {
this.bucket = bucket;
nodes = new ArrayList<>();
failure = Failure.NONE;
}
@Override
public boolean equals(Object other) {
if (!(other instanceof Test t)) return false;
return (bucket.equals(t.bucket)
&& nodes.equals(t.nodes)
&& failure.equals(t.failure));
}
@Override
public int hashCode() {
return java.util.Objects.hash(bucket, nodes);
}
public String toString() {
StringBuilder sb = new StringBuilder().append(bucket.toString());
if (failure == Failure.NONE) {
sb.append(" [");
for (int i=0; i<nodes.size(); ++i) {
if (i != 0) sb.append(" ");
sb.append(nodes.get(i));
}
sb.append("]");
} else {
sb.append(' ').append(failure);
}
return sb.toString();
}
public List<Integer> getNodes() {
return nodes;
}
public Test assertNodeCount(int count) {
if (count > 0) assertEquals(toString(), Failure.NONE, failure);
assertEquals(toString(), count, nodes.size());
return this;
}
public void assertNodeUsed(int node) {
assertEquals(toString(), Failure.NONE, failure);
assertTrue(toString(), nodes.contains(node));
}
}
public DistributionTestFactory(String name) {
super(testDirectory, name);
try{
redundancy = 3;
nodeCount = 10;
state = new ClusterState("distributor:" + nodeCount);
distributionConfig = deserializeConfig(Distribution.getDefaultDistributionConfig(redundancy, nodeCount));
nodeType = NodeType.DISTRIBUTOR;
upStates = "uim";
loadTestResults();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
@SuppressWarnings("deprecation")
private static StorDistributionConfig.Builder deserializeConfig(String s) {
return new StorDistributionConfig.Builder(
new ConfigGetter<>(StorDistributionConfig.class).getConfig("raw:" + s));
}
public DistributionTestFactory setNodeCount(int count) throws Exception {
nodeCount = count;
distributionConfig = deserializeConfig(Distribution.getDefaultDistributionConfig(redundancy, nodeCount));
state = new ClusterState("distributor:" + nodeCount);
return this;
}
public DistributionTestFactory setClusterState(ClusterState state) {
this.state = state;
return this;
}
public DistributionTestFactory setDistribution(StorDistributionConfig.Builder d) {
this.distributionConfig = d;
return this;
}
public Distribution getDistribution() {
return new Distribution(new StorDistributionConfig(distributionConfig));
}
public DistributionTestFactory setNodeType(NodeType n) {
this.nodeType = n;
return this;
}
public DistributionTestFactory setUpStates(String up) {
this.upStates = up;
return this;
}
public int getVerifiedTests() {
return testsVerified;
}
void verifySame(Test javaTest, Test other) {
assertEquals("Reference test " + testsRecorded + " differ.", other, javaTest);
++testsVerified;
}
Test recordResult(BucketId bucket) {
Test t = new Test(bucket);
Distribution d = new Distribution(new StorDistributionConfig(distributionConfig));
try{
if (nodeType.equals(NodeType.DISTRIBUTOR)) {
int node = d.getIdealDistributorNode(state, bucket, upStates);
t.nodes.add(node);
} else {
t.nodes.addAll(d.getIdealStorageNodes(state, bucket, upStates));
}
} catch (Distribution.TooFewBucketBitsInUseException e) {
t.failure = Failure.TOO_FEW_BITS;
} catch (Distribution.NoDistributorsAvailableException e) {
t.failure = Failure.NO_DISTRIBUTORS_AVAILABLE;
}
if (results.size() > testsRecorded) {
verifySame(t, results.get(testsRecorded));
} else {
results.add(t);
}
++testsRecorded;
return t;
}
public String serialize() {
ObjectNode test = new ObjectNode(mapper.getNodeFactory())
.put("cluster-state", state.toString())
.put("distribution", new StorDistributionConfig(distributionConfig).toString())
.put("node-type", nodeType.toString())
.put("redundancy", redundancy)
.put("node-count", nodeCount)
.put("up-states", upStates);
ArrayNode results = test.putArray("result");
for (Test t : this.results) {
results.addObject()
.putPOJO("nodes", t.nodes)
.put("bucket", Long.toHexString(t.bucket.getId()))
.put("failure", t.failure.toString());
}
return test.toPrettyString();
}
public void parse(String serialized) throws Exception {
JsonNode json = mapper.readTree(serialized);
upStates = json.get("up-states").textValue();
nodeCount = json.get("redundancy").intValue();
redundancy = json.get("redundancy").intValue();
state = new ClusterState(json.get("cluster-state").textValue());
distributionConfig = deserializeConfig(json.get("distribution").textValue());
nodeType = NodeType.get(json.get("node-type").textValue());
for (JsonNode result : json.get("result")) {
Test t = new Test(new BucketId(Long.parseLong(result.get("bucket").textValue(), 16)));
for (JsonNode node : result.get("nodes")) t.nodes.add(node.intValue());
t.failure = Failure.valueOf(result.get("failure").textValue());
this.results.add(t);
}
}
}
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