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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/searchlib/fef/blueprint.h>
namespace search::features {
/**
* Implements the executor for the 'now' feature. This executor returns the current
* system time, or the time specified by the query argument 'vespa.now'.
* Time is returned in two formats. First as seconds since epoch (first output),
* then as days since epoch and seconds within that day (second and third output).
* This is due to precision problems when encoding current time as a float.
**/
class NowExecutor : public fef::FeatureExecutor {
private:
// Current time, in seconds since epoch
int64_t _timestamp;
public:
/**
* Constructs a new executor.
**/
NowExecutor(int64_t timestamp);
void execute(uint32_t docId) override;
};
/**
* Implements the blueprint for 'now' feature.
*/
class NowBlueprint : public fef::Blueprint {
public:
NowBlueprint() : fef::Blueprint("now") { }
void visitDumpFeatures(const fef::IIndexEnvironment &env, fef::IDumpFeatureVisitor &visitor) const override;
fef::Blueprint::UP createInstance() const override;
fef::ParameterDescriptions getDescriptions() const override {
return fef::ParameterDescriptions().desc();
}
bool setup(const fef::IIndexEnvironment & env, const fef::ParameterList & params) override;
fef::FeatureExecutor &createExecutor(const fef::IQueryEnvironment &env, vespalib::Stash &stash) const override;
};
}
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