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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.vespa.clustercontroller.core;
import com.yahoo.vespa.clustercontroller.core.hostinfo.StorageNode;
import java.util.*;
/**
* @author hakonhall
*/
public class ContentNodeStats {
private final int nodeIndex;
private Map<String, BucketSpaceStats> bucketSpaces = new HashMap<>();
public static class BucketSpaceStats {
private int invalidCount;
private long bucketsTotal;
private long bucketsPending;
private BucketSpaceStats() {
this.invalidCount = 1;
this.bucketsTotal = 0;
this.bucketsPending = 0;
}
private BucketSpaceStats(long bucketsTotal, long bucketsPending, boolean invalid) {
this.invalidCount = (invalid ? 1 : 0);
this.bucketsTotal = bucketsTotal;
this.bucketsPending = bucketsPending;
}
public static BucketSpaceStats invalid() {
return new BucketSpaceStats();
}
public static BucketSpaceStats invalid(long bucketsTotal, long bucketsPending) {
return new BucketSpaceStats(bucketsTotal, bucketsPending, true);
}
public static BucketSpaceStats of(long bucketsTotal, long bucketsPending) {
return new BucketSpaceStats(bucketsTotal, bucketsPending, false);
}
public static BucketSpaceStats empty() {
return new BucketSpaceStats(0, 0, false);
}
public long getBucketsTotal() {
return bucketsTotal;
}
public long getBucketsPending() {
return bucketsPending;
}
public boolean mayHaveBucketsPending(double minMergeCompletionRatio) {
if (invalidCount > 0) {
return true;
}
if (bucketsTotal == 0) {
return bucketsPending > 0;
}
return calcMergeCompletionRatio() < minMergeCompletionRatio;
}
private double calcMergeCompletionRatio() {
return ((double) Math.max(0, (bucketsTotal - bucketsPending)) / (double) bucketsTotal);
}
public boolean valid() {
return invalidCount == 0;
}
public void merge(BucketSpaceStats rhs, int factor) {
this.invalidCount += (factor * rhs.invalidCount);
this.bucketsTotal += (factor * rhs.bucketsTotal);
this.bucketsPending += (factor * rhs.bucketsPending);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
BucketSpaceStats that = (BucketSpaceStats) o;
return invalidCount == that.invalidCount &&
bucketsTotal == that.bucketsTotal &&
bucketsPending == that.bucketsPending;
}
@Override
public int hashCode() {
return Objects.hash(invalidCount, bucketsTotal, bucketsPending);
}
@Override
public String toString() {
return "{bucketsTotal=" + bucketsTotal + ", bucketsPending=" + bucketsPending + ", invalidCount=" + invalidCount + "}";
}
}
public ContentNodeStats(StorageNode storageNode) {
this.nodeIndex = storageNode.getIndex();
for (StorageNode.BucketSpaceStats stats : storageNode.getBucketSpacesStats()) {
if (stats.valid()) {
this.bucketSpaces.put(stats.getName(),
BucketSpaceStats.of(stats.getBucketStats().getTotal(),
stats.getBucketStats().getPending()));
} else {
this.bucketSpaces.put(stats.getName(), BucketSpaceStats.invalid());
}
}
}
public ContentNodeStats(int index) {
this(index, new HashMap<>());
}
public ContentNodeStats(int index, Map<String, BucketSpaceStats> bucketSpaces) {
this.nodeIndex = index;
this.bucketSpaces = bucketSpaces;
}
public int getNodeIndex() { return nodeIndex; }
public void add(ContentNodeStats stats) {
merge(stats, 1);
}
public void subtract(ContentNodeStats stats) {
merge(stats, -1);
}
private void merge(ContentNodeStats stats, int factor) {
for (Map.Entry<String, BucketSpaceStats> entry : stats.bucketSpaces.entrySet()) {
BucketSpaceStats statsToUpdate = bucketSpaces.get(entry.getKey());
if (statsToUpdate == null && factor == 1) {
statsToUpdate = BucketSpaceStats.empty();
bucketSpaces.put(entry.getKey(), statsToUpdate);
}
if (statsToUpdate != null) {
statsToUpdate.merge(entry.getValue(), factor);
}
}
}
public BucketSpaceStats getBucketSpace(String bucketSpace) {
return bucketSpaces.get(bucketSpace);
}
public Map<String, BucketSpaceStats> getBucketSpaces() {
return bucketSpaces;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
ContentNodeStats that = (ContentNodeStats) o;
return nodeIndex == that.nodeIndex &&
Objects.equals(bucketSpaces, that.bucketSpaces);
}
@Override
public int hashCode() {
return Objects.hash(nodeIndex, bucketSpaces);
}
@Override
public String toString() {
return String.format("{index=%d, bucketSpaces=[%s]}",
nodeIndex, Arrays.toString(bucketSpaces.entrySet().toArray()));
}
}
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