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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/messagebus/routing/iroutingpolicy.h>
#include <vespa/vespalib/util/ptrholder.h>
#include <vespa/config-messagetyperouteselectorpolicy.h>
#include <vespa/config/helper/ifetchercallback.h>
#include <vespa/documentapi/common.h>
namespace config {
class ConfigUri;
class ConfigFetcher;
}
namespace mbus {
class RoutingContext;
class Route;
}
namespace documentapi {
namespace policy { class MessageTypeMap; }
/**
* This policy is responsible for selecting among the given recipient routes
* according to the configured document selection properties. To factilitate
* this the "routing" plugin in the vespa model builds a mapping from the route
* names to a document selector and a feed name of every search cluster. This
* can very well be extended to include storage at a later time.
*/
class MessageTypePolicy : public mbus::IRoutingPolicy,
public config::IFetcherCallback<vespa::config::content::MessagetyperouteselectorpolicyConfig>
{
private:
using MessageTypeHolder = vespalib::PtrHolder<policy::MessageTypeMap>;
using RouteHolder = vespalib::PtrHolder<mbus::Route>;
MessageTypeHolder _map;
RouteHolder _defaultRoute;
std::unique_ptr<config::ConfigFetcher> _fetcher;
public:
/**
* This policy is constructed with a configuration uri that can be used to
* subscribe for the document selector config. If the uri is empty, it will
* default to a proper one.
*
* @param configUri The configuration uri to subscribe with.
*/
MessageTypePolicy(const config::ConfigUri & configUri);
~MessageTypePolicy();
void configure(std::unique_ptr<vespa::config::content::MessagetyperouteselectorpolicyConfig> cfg) override;
void select(mbus::RoutingContext &context) override;
void merge(mbus::RoutingContext &context) override;
};
}
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