org.elasticsearch.search.profile.query.InternalQueryProfileTree Maven / Gradle / Ivy
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Elasticsearch subproject :server
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.search.profile.query;
import org.apache.lucene.search.Query;
import org.elasticsearch.search.profile.AbstractInternalProfileTree;
import org.elasticsearch.search.profile.ProfileResult;
/**
* This class tracks the dependency tree for queries (scoring and rewriting) and
* generates {@link QueryProfileBreakdown} for each node in the tree. It also finalizes the tree
* and returns a list of {@link ProfileResult} that can be serialized back to the client
*/
final class InternalQueryProfileTree extends AbstractInternalProfileTree {
/** Rewrite time */
private long rewriteTime;
private long rewriteScratch;
@Override
protected QueryProfileBreakdown createProfileBreakdown() {
return new QueryProfileBreakdown();
}
@Override
protected String getTypeFromElement(Query query) {
// Anonymous classes won't have a name,
// we need to get the super class
if (query.getClass().getSimpleName().isEmpty()) {
return query.getClass().getSuperclass().getSimpleName();
}
return query.getClass().getSimpleName();
}
@Override
protected String getDescriptionFromElement(Query query) {
return query.toString();
}
/**
* Begin timing a query for a specific Timing context
*/
public void startRewriteTime() {
assert rewriteScratch == 0;
rewriteScratch = System.nanoTime();
}
/**
* Halt the timing process and add the elapsed rewriting time.
* startRewriteTime() must be called for a particular context prior to calling
* stopAndAddRewriteTime(), otherwise the elapsed time will be negative and
* nonsensical
*
* @return The elapsed time
*/
public long stopAndAddRewriteTime() {
long time = Math.max(1, System.nanoTime() - rewriteScratch);
rewriteTime += time;
rewriteScratch = 0;
return time;
}
public long getRewriteTime() {
return rewriteTime;
}
}