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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
class FNET_Transport;
namespace storage::spi { struct BucketExecutor; }
namespace vespalib {
class ISequencedTaskExecutor;
class ThreadExecutor;
class InvokeService;
class Clock;
}
namespace proton {
/**
* Interface containing the thread executors that are shared across all document dbs.
*/
class ISharedThreadingService {
public:
virtual ~ISharedThreadingService() = default;
/**
* Returns the shared executor used for various assisting tasks in a document db.
*
* Example usages include:
* - Disk index fusion.
* - Updating nearest neighbor index (in DenseTensorAttribute).
* - Loading nearest neighbor index (in DenseTensorAttribute).
* - Writing of data in the document store.
*/
virtual vespalib::ThreadExecutor& shared() = 0;
/**
* Returns the sequenced executor used to write index and attribute fields in a document db.
*/
virtual vespalib::ISequencedTaskExecutor& field_writer() = 0;
/**
* Returns an InvokeService intended for regular wakeup calls.
*/
virtual vespalib::InvokeService & invokeService() = 0;
/**
* Returns a shared transport object that can be utilized by multiple services.
*/
virtual FNET_Transport & transport() = 0;
/**
* Returns the executor for running a BucketTask in the persistence layer above the SPI.
*/
virtual storage::spi::BucketExecutor& bucket_executor() = 0;
/**
* Return a very cheap clock.
*/
virtual const vespalib::Clock & clock() const = 0;
};
}
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