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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.model.builder.xml.dom.chains.search;
import com.yahoo.component.ComponentId;
import com.yahoo.component.chain.model.ChainSpecification;
import com.yahoo.config.model.deploy.DeployState;
import com.yahoo.config.model.producer.AbstractConfigProducer;
import com.yahoo.search.searchchain.model.federation.FederationOptions;
import com.yahoo.search.searchchain.model.federation.LocalProviderSpec;
import com.yahoo.text.XML;
import com.yahoo.vespa.model.builder.xml.dom.chains.ComponentsBuilder;
import com.yahoo.vespa.model.container.search.searchchain.GenericProvider;
import com.yahoo.vespa.model.container.search.searchchain.LocalProvider;
import com.yahoo.vespa.model.container.search.searchchain.Provider;
import com.yahoo.vespa.model.container.search.searchchain.Source;
import org.w3c.dom.Element;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
/**
* Builds a provider from xml.
* The demangling of provider types is taken care of here,
* since the mangling is an intrinsic of the configuration language,
* not the model itself.
*
* @author Tony Vaagenes
*/
public class DomProviderBuilder extends DomGenericTargetBuilder<Provider> {
/**
* Retrieves all possible provider specific parameters
*/
private static class ProviderReader {
final String type;
final String path;
final Double cacheWeight;
final Integer retries;
final Double readTimeout;
final Double connectionTimeout;
final Double connectionPoolTimeout;
final String clusterName;
final List<Node> nodes;
ProviderReader(Element providerElement) {
type = readType(providerElement);
path = readPath(providerElement);
cacheWeight = readCacheWeight(providerElement);
clusterName = readCluster(providerElement);
readTimeout = readReadTimeout(providerElement);
connectionTimeout = readConnectionTimeout(providerElement);
connectionPoolTimeout = readConnectionPoolTimeout(providerElement);
retries = readRetries(providerElement);
nodes = readNodes(providerElement);
}
private String getAttributeOrNull(Element element, String name) {
String value = element.getAttribute(name);
return value.isEmpty() ? null : value;
}
private String readPath(Element providerElement) {
return getAttributeOrNull(providerElement, "path");
}
private String readCluster(Element providerElement) {
return getAttributeOrNull(providerElement, "cluster");
}
private Double readCacheWeight(Element providerElement) {
String cacheWeightString = getAttributeOrNull(providerElement, "cacheweight");
return (cacheWeightString == null)? null : Double.parseDouble(cacheWeightString);
}
private Integer readRetries(Element providerElement) {
String retriesString = getAttributeOrNull(providerElement, "retries");
return (retriesString == null) ? null : Integer.parseInt(retriesString);
}
private Double readReadTimeout(Element providerElement) {
String timeoutString = getAttributeOrNull(providerElement, "readtimeout");
return (timeoutString == null) ? null : TimeParser.seconds(timeoutString);
}
private Double readConnectionTimeout(Element providerElement) {
String timeoutString = getAttributeOrNull(providerElement, "connectiontimeout");
return (timeoutString == null) ? null : TimeParser.seconds(timeoutString);
}
private Double readConnectionPoolTimeout(Element providerElement) {
String timeoutString = getAttributeOrNull(providerElement, "connectionpooltimeout");
return (timeoutString == null) ? null : TimeParser.seconds(timeoutString);
}
private List<Node> readNodes(Element providerElement) {
Element nodesSpec = XML.getChild(providerElement, "nodes");
if (nodesSpec == null) {
return null;
}
List<Node> nodes = new ArrayList<>();
for (Element nodeSpec : XML.getChildren(nodesSpec, "node")) {
nodes.add(readNode(nodeSpec));
}
return nodes;
}
private Node readNode(Element nodeElement) {
String host = getAttributeOrNull(nodeElement, "host");
// The direct calls to parse methods below works because the schema
// guarantees us no null references
int port = Integer.parseInt(getAttributeOrNull(nodeElement, "port"));
return new Node(host, port);
}
private String readType(Element providerElement) {
return getAttributeOrNull(providerElement, "type");
}
}
public DomProviderBuilder(Map<String, ComponentsBuilder.ComponentType<?>> outerSearcherTypeByComponentName) {
super(outerSearcherTypeByComponentName);
}
@Override
protected Provider buildChain(DeployState deployState, AbstractConfigProducer<?> ancestor, Element providerElement,
ChainSpecification specWithoutInnerComponents) {
ProviderReader providerReader = new ProviderReader(providerElement);
FederationOptions federationOptions = readFederationOptions(providerElement);
Provider provider = buildProvider(specWithoutInnerComponents, providerReader, federationOptions);
Collection<Source> sources = buildSources(deployState, ancestor, providerElement);
addSources(provider, sources);
return provider;
}
private Collection<Source> buildSources(DeployState deployState, AbstractConfigProducer<?> ancestor, Element providerElement) {
List<Source> sources = new ArrayList<>();
for (Element sourceElement : XML.getChildren(providerElement, "source")) {
sources.add(new DomSourceBuilder(outerComponentTypeByComponentName).build(deployState, ancestor, sourceElement));
}
return sources;
}
private void addSources(Provider provider, Collection<Source> sources) {
for (Source source : sources) {
provider.addSource(source);
}
}
private Provider buildProvider(ChainSpecification specWithoutInnerSearchers,
ProviderReader providerReader,
FederationOptions federationOptions) {
if (providerReader.type == null) {
return new GenericProvider(specWithoutInnerSearchers, federationOptions);
} else if (LocalProviderSpec.includesType(providerReader.type)) {
return buildLocalProvider(specWithoutInnerSearchers, providerReader, federationOptions);
} else {
throw new IllegalArgumentException("Unknown provider type '" + providerReader.type + "'");
}
}
private Provider buildLocalProvider(ChainSpecification specWithoutInnerSearchers,
ProviderReader providerReader,
FederationOptions federationOptions) {
try {
ensureEmpty(specWithoutInnerSearchers.componentId,
providerReader.cacheWeight,
providerReader.path,
providerReader.nodes,
providerReader.readTimeout,
providerReader.connectionTimeout,
providerReader.connectionPoolTimeout,
providerReader.retries);
return new LocalProvider(specWithoutInnerSearchers,
federationOptions,
new LocalProviderSpec(providerReader.clusterName));
} catch (Exception e) {
throw new RuntimeException("Failed creating local provider " + specWithoutInnerSearchers.componentId, e);
}
}
private void ensureEmpty(ComponentId componentId, Object... objects) {
for (Object object : objects) {
if (object != null) {
throw new IllegalArgumentException("Invalid provider option in provider '" + componentId + "': value='" + object + "'");
}
}
}
public static class Node {
public final String host;
public final int port;
public Node(String host, int port) {
this.host = host;
this.port = port;
}
@Override
public String toString() {
return "Node{" + "host='" + host + '\'' + ", port=" + port + '}';
}
}
}
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