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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.model.container.search.searchchain;
import com.yahoo.collections.CollectionUtil;
import com.yahoo.component.ComponentId;
import com.yahoo.component.ComponentSpecification;
import com.yahoo.component.provider.ComponentRegistry;
import com.yahoo.search.searchchain.model.federation.FederationOptions;
import com.yahoo.search.searchchain.model.federation.FederationSearcherModel;
import com.yahoo.search.federation.FederationConfig;
import com.yahoo.search.searchchain.model.federation.FederationSearcherModel.TargetSpec;
import com.yahoo.vespa.model.container.component.Component;
import java.util.ArrayList;
import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
/**
* Config producer for the FederationSearcher.
*
* @author Tony Vaagenes
*/
public class FederationSearcher extends Searcher<FederationSearcherModel> implements FederationConfig.Producer {
private final Optional<Component> targetSelector;
/**
* Generates config for a single search chain contained in a target.
*/
private static final class SearchChainConfig {
private final SearchChain searchChain;
final ComponentId providerId;
final FederationOptions targetOptions;
final List<String> documentTypes;
SearchChainConfig(SearchChain searchChain, ComponentId providerId,
FederationOptions targetOptions, List<String> documentTypes) {
this.searchChain = searchChain;
this.providerId = providerId;
this.targetOptions = targetOptions;
this.documentTypes = documentTypes;
}
FederationConfig.Target.SearchChain.Builder getSearchChainConfig() {
FederationConfig.Target.SearchChain.Builder sB = new FederationConfig.Target.SearchChain.Builder();
FederationOptions resolvedOptions = targetOptions.inherit(searchChain.federationOptions());
sB.
searchChainId(searchChain.getGlobalComponentId().stringValue()).
timeoutMillis(resolvedOptions.getTimeoutInMilliseconds()).
requestTimeoutMillis(resolvedOptions.getRequestTimeoutInMilliseconds()).
optional(resolvedOptions.getOptional()).
useByDefault(resolvedOptions.getUseByDefault()).
documentTypes(documentTypes);
if (providerId != null)
sB.providerId(providerId.stringValue());
return sB;
}
}
/**
* One or more search chains that are handled as a single group,
* which can be federated to as a single entity.
*/
private static abstract class Target {
final ComponentId id;
final FederationOptions targetOptions;
Target(ComponentId id, FederationOptions targetOptions) {
this.id = id;
this.targetOptions = targetOptions;
}
FederationConfig.Target.Builder getTargetConfig() {
FederationConfig.Target.Builder tb = new FederationConfig.Target.Builder();
tb.
id(id.stringValue()).
useByDefault(targetOptions.getUseByDefault());
getSearchChainsConfig(tb);
return tb;
}
protected abstract void getSearchChainsConfig(FederationConfig.Target.Builder tb);
}
private static class SearchChainTarget extends Target {
private final SearchChainConfig searchChainConfig;
SearchChainTarget(SearchChain searchChain, FederationOptions targetOptions) {
super(searchChain.getComponentId(), targetOptions);
searchChainConfig = new SearchChainConfig(searchChain, null, targetOptions, searchChain.getDocumentTypes());
}
@Override
protected void getSearchChainsConfig(FederationConfig.Target.Builder tB) {
tB.searchChain(searchChainConfig.getSearchChainConfig());
}
}
private static class SourceGroupTarget extends Target {
private final SearchChainConfig leaderConfig;
private final List<SearchChainConfig> participantsConfig = new ArrayList<>();
public SourceGroupTarget(SourceGroup group, FederationOptions targetOptions) {
super(group.getComponentId(), applyDefaultSourceGroupOptions(targetOptions));
leaderConfig = createConfig(group.leader(), targetOptions);
for (Source participant : group.participants())
participantsConfig.add(createConfig(participant, targetOptions));
}
private static FederationOptions applyDefaultSourceGroupOptions(FederationOptions targetOptions) {
FederationOptions defaultSourceGroupOption = new FederationOptions().setUseByDefault(true);
return targetOptions.inherit(defaultSourceGroupOption);
}
private SearchChainConfig createConfig(Source source, FederationOptions targetOptions) {
return new SearchChainConfig(source,
source.getParentProvider().getComponentId(),
targetOptions,
source.getDocumentTypes());
}
@Override
protected void getSearchChainsConfig(FederationConfig.Target.Builder tB) {
tB.searchChain(leaderConfig.getSearchChainConfig());
for (SearchChainConfig participant : participantsConfig)
tB.searchChain(participant.getSearchChainConfig());
}
}
private static class TargetResolver {
final ComponentRegistry<SearchChain> searchChainRegistry;
final SourceGroupRegistry sourceGroupRegistry;
/** Returns true if searchChain.id newer than sourceGroup.id */
private boolean newerVersion(SearchChain searchChain, SourceGroup sourceGroup) {
if (searchChain == null || sourceGroup == null) return false;
return newerVersion(searchChain.getComponentId(), sourceGroup.getComponentId());
}
/** Returns true if a newer than b */
private boolean newerVersion(ComponentId a, ComponentId b) {
return a.compareTo(b) > 0;
}
TargetResolver(ComponentRegistry<SearchChain> searchChainRegistry, SourceGroupRegistry sourceGroupRegistry) {
this.searchChainRegistry = searchChainRegistry;
this.sourceGroupRegistry = sourceGroupRegistry;
}
Target resolve(FederationSearcherModel.TargetSpec specification) {
SearchChain searchChain = searchChainRegistry.getComponent(specification.sourceSpec);
SourceGroup sourceGroup = sourceGroupRegistry.getComponent(specification.sourceSpec);
if (searchChain == null && sourceGroup == null) {
return null;
} else if (sourceGroup == null || newerVersion(searchChain, sourceGroup)) {
return new SearchChainTarget(searchChain, specification.federationOptions);
} else {
return new SourceGroupTarget(sourceGroup, specification.federationOptions);
}
}
}
private final Map<ComponentId, Target> resolvedTargets = new LinkedHashMap<>();
public FederationSearcher(FederationSearcherModel searcherModel, Optional<Component> targetSelector) {
super(searcherModel);
this.targetSelector = targetSelector;
targetSelector.ifPresent(selector -> addChild(selector));
}
@Override
public void getConfig(FederationConfig.Builder builder) {
for (Target target : resolvedTargets.values())
builder.target(target.getTargetConfig());
targetSelector.ifPresent(selector -> builder.targetSelector(selector.getGlobalComponentId().stringValue()));
}
@Override
public void initialize() {
initialize(getSearchChains().allChains(), getSearchChains().allSourceGroups());
}
void initialize(ComponentRegistry<SearchChain> searchChainRegistry, SourceGroupRegistry sourceGroupRegistry) {
TargetResolver targetResolver = new TargetResolver(searchChainRegistry, sourceGroupRegistry);
addSourceTargets(targetResolver, model.targets);
if (model.inheritDefaultSources)
addDefaultTargets(targetResolver, searchChainRegistry);
}
private void addSourceTargets(TargetResolver targetResolver, List<TargetSpec> targets) {
for (TargetSpec targetSpec : targets) {
Target target = targetResolver.resolve(targetSpec);
if (target == null) {
throw new IllegalArgumentException("Can't find source " + targetSpec.sourceSpec +
" used as a source for federation '" + getComponentId() + "'");
}
Target duplicate = resolvedTargets.put(target.id, target);
if (duplicate != null && !duplicate.targetOptions.equals(target.targetOptions)) {
throw new IllegalArgumentException("Search chain " + target.id + " added twice with different federation options" +
" to the federation searcher " + getComponentId());
}
}
}
private void addDefaultTargets(TargetResolver targetResolver, ComponentRegistry<SearchChain> searchChainRegistry) {
for (GenericTarget genericTarget : defaultTargets(searchChainRegistry.allComponents())) {
ComponentSpecification specification = genericTarget.getComponentId().toSpecification();
// Can't use genericTarget directly, as it might be part of a source group.
Target federationTarget = targetResolver.resolve(new TargetSpec(specification, new FederationOptions()));
// Do not replace manually added sources, as they might have manually configured federation options
if (!resolvedTargets.containsKey(federationTarget.id))
resolvedTargets.put(federationTarget.id, federationTarget);
}
}
private static List<GenericTarget> defaultTargets(Collection<SearchChain> allSearchChains) {
Collection<Provider> providers = CollectionUtil.filter(allSearchChains, Provider.class);
List<GenericTarget> defaultTargets = new ArrayList<>();
for (Provider provider : providers)
defaultTargets.addAll(provider.defaultFederationTargets());
return defaultTargets;
}
}
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