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96fbcc9a5a
Manager is changed to be a Meyer's singleton, with factories automatically registering upon construction.
80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of rippled: https://github.com/ripple/rippled
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Copyright (c) 2012, 2013 Ripple Labs Inc.
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#ifndef RIPPLE_NODESTORE_SCHEDULER_H_INCLUDED
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#define RIPPLE_NODESTORE_SCHEDULER_H_INCLUDED
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#include <ripple/nodestore/Task.h>
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#include <chrono>
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namespace ripple {
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namespace NodeStore {
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/** Contains information about a fetch operation. */
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struct FetchReport
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{
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std::chrono::milliseconds elapsed;
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bool isAsync;
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bool wentToDisk;
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bool wasFound;
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};
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/** Contains information about a batch write operation. */
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struct BatchWriteReport
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{
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std::chrono::milliseconds elapsed;
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int writeCount;
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};
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/** Scheduling for asynchronous backend activity
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For improved performance, a backend has the option of performing writes
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in batches. These writes can be scheduled using the provided scheduler
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object.
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@see BatchWriter
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*/
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class Scheduler
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{
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public:
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virtual ~Scheduler() = default;
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/** Schedules a task.
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Depending on the implementation, the task may be invoked either on
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the current thread of execution, or an unspecified implementation-defined
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foreign thread.
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*/
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virtual void scheduleTask (Task& task) = 0;
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/** Reports completion of a fetch
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Allows the scheduler to monitor the node store's performance
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*/
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virtual void onFetch (FetchReport const& report) = 0;
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/** Reports the completion of a batch write
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Allows the scheduler to monitor the node store's performance
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*/
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virtual void onBatchWrite (BatchWriteReport const& report) = 0;
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};
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}
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}
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#endif
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