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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.hosted.controller.routing;
import com.yahoo.collections.AbstractFilteringList;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.config.provision.ClusterSpec;
import com.yahoo.vespa.hosted.controller.api.identifiers.DeploymentId;
import com.yahoo.vespa.hosted.controller.application.EndpointId;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.function.Function;
import java.util.stream.Collectors;
/**
* A filterable list of {@link RoutingPolicy}'s.
*
* This is immutable.
*
* @author mpolden
*/
public class RoutingPolicyList extends AbstractFilteringList<RoutingPolicy, RoutingPolicyList> {
private final Map<RoutingPolicyId, RoutingPolicy> policiesById;
protected RoutingPolicyList(Collection<RoutingPolicy> items, boolean negate) {
super(items, negate, RoutingPolicyList::new);
this.policiesById = items.stream().collect(Collectors.collectingAndThen(
Collectors.toMap(RoutingPolicy::id,
Function.identity(),
(p1, p2) -> {
throw new IllegalArgumentException("Duplicate key " + p1.id());
},
LinkedHashMap::new),
Collections::unmodifiableMap)
);
}
/** Returns the subset of policies owned by given instance */
public RoutingPolicyList instance(ApplicationId instance) {
return matching(policy -> policy.id().owner().equals(instance));
}
/** Returns the subset of policies applying to given cluster */
public RoutingPolicyList cluster(ClusterSpec.Id cluster) {
return matching(policy -> policy.id().cluster().equals(cluster));
}
/** Returns the subset of policies applying to given deployment */
public RoutingPolicyList deployment(DeploymentId deployment) {
return matching(policy -> policy.appliesTo(deployment));
}
/** Returns the policy with given ID, if any */
public Optional<RoutingPolicy> of(RoutingPolicyId id) {
return Optional.ofNullable(policiesById.get(id));
}
/** Returns this grouped by policy ID */
public Map<RoutingPolicyId, RoutingPolicy> asMap() {
return policiesById;
}
/** Returns a copy of this with all policies for instance replaced with given policies */
public RoutingPolicyList replace(ApplicationId instance, RoutingPolicyList policies) {
List<RoutingPolicy> copy = new ArrayList<>(asList());
copy.removeIf(policy -> policy.id().owner().equals(instance));
policies.forEach(copy::add);
return copyOf(copy);
}
/** Returns a copy of this excluding the given policy */
public RoutingPolicyList without(RoutingPolicy policy) {
List<RoutingPolicy> copy = new ArrayList<>(asList());
copy.remove(policy);
return copyOf(copy);
}
/** Create a routing table for instance-level endpoints backed by routing policies in this */
Map<RoutingId, List<RoutingPolicy>> asInstanceRoutingTable() {
return asRoutingTable(false);
}
/** Create a routing table for application-level endpoints backed by routing policies in this */
Map<RoutingId, List<RoutingPolicy>> asApplicationRoutingTable() {
return asRoutingTable(true);
}
private Map<RoutingId, List<RoutingPolicy>> asRoutingTable(boolean applicationLevel) {
Map<RoutingId, List<RoutingPolicy>> routingTable = new LinkedHashMap<>();
for (var policy : this) {
Set<EndpointId> endpoints = applicationLevel ? policy.applicationEndpoints() : policy.instanceEndpoints();
for (var endpoint : endpoints) {
RoutingId id = RoutingId.of(policy.id().owner(), endpoint);
routingTable.computeIfAbsent(id, k -> new ArrayList<>())
.add(policy);
}
}
return Collections.unmodifiableMap(routingTable);
}
public static RoutingPolicyList copyOf(Collection<RoutingPolicy> policies) {
return new RoutingPolicyList(policies, false);
}
}
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