1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "operationstarter.h"
#include <vespa/storage/distributor/maintenance/pending_window_checker.h>
#include <vespa/vespalib/util/hdr_abort.h>
#include <vespa/storage/distributor/operations/operation.h>
namespace storage::distributor {
class ThrottlingOperationStarter : public OperationStarter, public PendingWindowChecker
{
class ThrottlingOperation : public Operation
{
public:
ThrottlingOperation(Operation::SP operation,
ThrottlingOperationStarter& operationStarter)
: _operation(std::move(operation)),
_operationStarter(operationStarter)
{}
~ThrottlingOperation() override;
private:
Operation::SP _operation;
ThrottlingOperationStarter& _operationStarter;
ThrottlingOperation(const ThrottlingOperation&);
ThrottlingOperation& operator=(const ThrottlingOperation&);
void onClose(DistributorStripeMessageSender& sender) override {
_operation->onClose(sender);
}
[[nodiscard]] const char* getName() const noexcept override {
return _operation->getName();
}
[[nodiscard]] std::string getStatus() const override {
return _operation->getStatus();
}
[[nodiscard]] std::string toString() const override {
return _operation->toString();
}
void start(DistributorStripeMessageSender& sender, vespalib::system_time startTime) override {
_operation->start(sender, startTime);
}
void receive(DistributorStripeMessageSender& sender, const std::shared_ptr<api::StorageReply> & msg) override {
_operation->receive(sender, msg);
}
void onStart(DistributorStripeMessageSender&) override {
// Should never be called directly on the throttled operation
// instance, but rather on its wrapped implementation.
HDR_ABORT("should not be reached");
}
void onReceive(DistributorStripeMessageSender&,
const std::shared_ptr<api::StorageReply>&) override {
HDR_ABORT("should not be reached");
}
};
OperationStarter& _starterImpl;
public:
explicit ThrottlingOperationStarter(OperationStarter& starterImpl)
: _starterImpl(starterImpl),
_minPending(0),
_maxPending(UINT32_MAX),
_pendingCount(0)
{}
~ThrottlingOperationStarter() override;
bool start(const std::shared_ptr<Operation>& operation, Priority priority) override;
[[nodiscard]] bool may_allow_operation_with_priority(Priority priority) const noexcept override;
[[nodiscard]] bool canStart(uint32_t currentOperationCount, Priority priority) const;
void setMaxPendingRange(uint32_t minPending, uint32_t maxPending) {
_minPending = minPending;
_maxPending = maxPending;
}
private:
ThrottlingOperationStarter(const ThrottlingOperationStarter&);
ThrottlingOperationStarter& operator=(const ThrottlingOperationStarter&);
friend class ThrottlingOperation;
void signalOperationFinished(const Operation& op);
uint32_t _minPending;
uint32_t _maxPending;
uint32_t _pendingCount;
};
}
|
