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// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.dispatch;
import com.yahoo.prelude.fastsearch.DocumentDatabase;
import com.yahoo.prelude.fastsearch.VespaBackEndSearcher;
import com.yahoo.processing.request.CompoundName;
import com.yahoo.search.Query;
import com.yahoo.search.Result;
import com.yahoo.search.dispatch.searchcluster.Node;
import com.yahoo.search.dispatch.searchcluster.SearchCluster;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Optional;
import java.util.OptionalInt;
import java.util.Set;
/**
* @author ollivir
*/
public class RpcInvokerFactory extends InvokerFactory {
/** Unless turned off this will fill summaries by dispatching directly to search nodes over RPC when possible */
private final static CompoundName dispatchSummaries = new CompoundName("dispatch.summaries");
private final RpcResourcePool rpcResourcePool;
private final SearchCluster searchCluster;
public RpcInvokerFactory(RpcResourcePool rpcResourcePool, SearchCluster searchCluster) {
this.rpcResourcePool = rpcResourcePool;
this.searchCluster = searchCluster;
}
@Override
public Optional<SearchInvoker> createSearchInvoker(VespaBackEndSearcher searcher, Query query, OptionalInt groupId, List<Node> nodes,
boolean acceptIncompleteCoverage) {
List<SearchInvoker> invokers = new ArrayList<>(nodes.size());
Set<Integer> failed = null;
for (Node node : nodes) {
if (node.isWorking()) {
invokers.add(new RpcSearchInvoker(searcher, node, rpcResourcePool));
} else {
if (failed == null) {
failed = new HashSet<>();
}
failed.add(node.key());
}
}
if (failed != null) {
List<Node> success = new ArrayList<>(nodes.size() - failed.size());
for (Node node : nodes) {
if (!failed.contains(node.key())) {
success.add(node);
}
}
if (!searchCluster.isPartialGroupCoverageSufficient(groupId, success)) {
if (acceptIncompleteCoverage) {
invokers.add(createCoverageErrorInvoker(nodes, failed));
} else {
return Optional.empty();
}
}
}
if (invokers.size() == 1) {
return Optional.of(invokers.get(0));
} else {
return Optional.of(new InterleavedSearchInvoker(invokers, searcher, searchCluster));
}
}
@Override
public Optional<FillInvoker> createFillInvoker(VespaBackEndSearcher searcher, Result result) {
Query query = result.getQuery();
if (query.properties().getBoolean(dispatchSummaries, true)
&& ! searcher.summaryNeedsQuery(query)
&& query.getRanking().getLocation() == null)
{
return Optional.of(new RpcFillInvoker(rpcResourcePool, searcher.getDocumentDatabase(query)));
} else {
return Optional.empty();
}
}
// for testing
public FillInvoker createFillInvoker(DocumentDatabase documentDb) {
return new RpcFillInvoker(rpcResourcePool, documentDb);
}
public void release() {
rpcResourcePool.release();
}
}
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