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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.documentapi.messagebus.protocol;
import com.yahoo.config.subscription.ConfigSubscriber;
import com.yahoo.messagebus.routing.Route;
import com.yahoo.messagebus.routing.RoutingContext;
import com.yahoo.vespa.config.content.MessagetyperouteselectorpolicyConfig;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicReference;
import static java.util.stream.Collectors.toUnmodifiableMap;
/**
* @author baldersheim
*/
public class MessageTypePolicy implements DocumentProtocolRoutingPolicy, ConfigSubscriber.SingleSubscriber<MessagetyperouteselectorpolicyConfig> {
private final AtomicReference<Map<Integer, Route>> configRef = new AtomicReference<>();
private ConfigSubscriber subscriber;
private volatile Route defaultRoute;
MessageTypePolicy(DocumentProtocolPoliciesConfig.Cluster config) {
configRef.set(config.route().stream()
.collect(toUnmodifiableMap(route -> route.messageType(),
route -> Route.parse(route.name()))));
defaultRoute = Route.parse(config.defaultRoute());
}
MessageTypePolicy(String configId) {
subscriber = new ConfigSubscriber();
subscriber.subscribe(this, MessagetyperouteselectorpolicyConfig.class, configId);
}
@Override
public void select(RoutingContext context) {
int messageType = context.getMessage().getType();
Route route = configRef.get().get(messageType);
if (route == null) {
route = defaultRoute;
}
context.addChild(route);
}
@Override
public void merge(RoutingContext context) {
DocumentProtocol.merge(context);
}
@Override
public void destroy() {
if (subscriber!=null) subscriber.close();
}
@Override
public void configure(MessagetyperouteselectorpolicyConfig cfg) {
Map<Integer, Route> h = new HashMap<>();
for (MessagetyperouteselectorpolicyConfig.Route selector : cfg.route()) {
h.put(selector.messagetype(), Route.parse(selector.name()));
}
configRef.set(h);
defaultRoute = Route.parse(cfg.defaultroute());
}
}
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