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// Copyright 2017 Yahoo Holdings. 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;
/**
* @author hakonhall
*/
public class NodeMergeStats {
/**
* Constructor that sets values to zero if not present.
*/
public NodeMergeStats(StorageNode storageNodePojo) {
this.nodeIndex = storageNodePojo.getIndex();
StorageNode.OutstandingMergeOps mergeOps = storageNodePojo.getOutstandingMergeOpsOrNull();
if (mergeOps == null) {
mergeOps = new StorageNode.OutstandingMergeOps();
}
syncing = createAmount(mergeOps.getSyncingOrNull());
copyingIn = createAmount(mergeOps.getCopyingInOrNull());
movingOut = createAmount(mergeOps.getMovingOutOrNull());
copyingOut = createAmount(mergeOps.getCopyingOutOrNull());
}
private static Amount createAmount(StorageNode.Buckets bucketOrNull) {
if (bucketOrNull == null) {
return new Amount();
}
return new Amount(bucketOrNull.getBuckets());
}
static public class Amount {
private long buckets;
Amount() { this(0); }
Amount(long buckets) { this.buckets = buckets; }
public void set(Amount other) {
buckets = other.buckets;
}
public long getBuckets() {
return buckets;
}
/**
* Logically, add (factor * amount) to this object.
*/
void scaledAdd(int factor, Amount amount) {
buckets += factor * amount.buckets;
}
public boolean equals(Object other) {
if (!(other instanceof Amount)) {
return false;
}
Amount otherAmount = (Amount) other;
return buckets == otherAmount.buckets;
}
public int hashCode() {
return (int)buckets;
}
public String toString() {
return String.format("{buckets = %d}", buckets);
}
}
private final Amount syncing;
private final Amount copyingIn;
private final Amount movingOut;
private final Amount copyingOut;
private int nodeIndex;
/**
* An instance with all 0 amounts.
*/
public NodeMergeStats(int index) {
this(index, new Amount(), new Amount(), new Amount(), new Amount());
}
NodeMergeStats(int index, Amount syncing, Amount copyingIn, Amount movingOut, Amount copyingOut) {
this.nodeIndex = index;
this.syncing = syncing;
this.copyingIn = copyingIn;
this.movingOut = movingOut;
this.copyingOut = copyingOut;
}
public void set(NodeMergeStats stats) {
nodeIndex = stats.nodeIndex;
syncing.set(stats.syncing);
copyingIn.set(stats.copyingIn);
movingOut.set(stats.movingOut);
copyingOut.set(stats.copyingOut);
}
int getNodeIndex() { return nodeIndex; }
public Amount getSyncing() { return syncing; }
public Amount getCopyingIn() { return copyingIn; }
public Amount getMovingOut() { return movingOut; }
public Amount getCopyingOut() { return copyingOut; }
void add(NodeMergeStats stats) {
scaledAdd(1, stats);
}
void subtract(NodeMergeStats stats) {
scaledAdd(-1, stats);
}
/**
* Logically, adds (factor * stats) to this object. factor of 1 is normal add, -1 is subtraction.
*/
private void scaledAdd(int factor, NodeMergeStats stats) {
syncing.scaledAdd(factor, stats.syncing);
copyingIn.scaledAdd(factor, stats.copyingIn);
movingOut.scaledAdd(factor, stats.movingOut);
copyingOut.scaledAdd(factor, stats.copyingOut);
}
@Override
public int hashCode() {
return (int) (syncing.buckets +
copyingIn.buckets * 31 +
movingOut.buckets * 17 +
copyingOut.buckets * 7);
}
@Override
public boolean equals(Object other) {
if (!(other instanceof NodeMergeStats)) {
return false;
}
NodeMergeStats otherStats = (NodeMergeStats) other;
return nodeIndex == otherStats.nodeIndex &&
syncing.equals(otherStats.syncing) &&
copyingIn.equals(otherStats.copyingIn) &&
movingOut.equals(otherStats.movingOut) &&
copyingOut.equals(otherStats.copyingOut);
}
public String toString() {
return String.format("{index = %d, syncing = %s, copyingIn = %s, movingOut = %s, copyingOut = %s}",
nodeIndex, syncing, copyingIn, movingOut, copyingOut);
}
}
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