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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/vespalib/stllike/string.h>
#include <memory>
namespace config {
class ConfigValue;
class ConfigKey;
struct ConfigState;
class Trace;
/**
* Baseclass for config responses.
*/
class ConfigResponse {
public:
virtual ~ConfigResponse() = default;
virtual const ConfigKey & getKey() const = 0;
virtual const ConfigValue & getValue() const = 0;
virtual const ConfigState & getConfigState() const = 0;
virtual const Trace & getTrace() const = 0;
virtual bool hasValidResponse() const = 0;
/**
* Verifies that the returned response meets any criteria (decided by the implementation) to use the getters
* for return values. The result from this validation can be found without performing the validation
* again by calling {@link ConfigResponse#hasValidResponse()}.
*
* @return true if the returned response meets criteria to use the getters for return values.
*/
virtual bool validateResponse() = 0;
/**
* Fills all data received in the response in order to be able to retrieve
* the config values. Should not be called before the response has been
* validated.
*/
virtual void fill() = 0;
/** @return Error message if a request has failed, null otherwise. */
virtual vespalib::string errorMessage() const = 0;
virtual int errorCode() const = 0;
virtual bool isError() const = 0;
};
}
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