blob: e0db8cc7196cfca5180607cbb703ffa090f00e2c (
plain) (
blame)
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
|
// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "bucket.h"
namespace storage {
namespace lib {
class ClusterState;
class Distribution;
}
namespace spi {
/**
* Used to determine the state of the current node and its buckets.
*/
class ClusterState {
public:
typedef std::shared_ptr<ClusterState> SP;
ClusterState(const lib::ClusterState& state,
uint16_t nodeIndex,
const lib::Distribution& distribution);
ClusterState(vespalib::nbostream& i);
ClusterState(const ClusterState& other);
ClusterState& operator=(const ClusterState& other);
~ClusterState();
/**
* Returns true if the system has been set up to have
* "ready" nodes, and the given bucket is in the ideal state
* for readiness.
*
* @param b The bucket to check.
*/
bool shouldBeReady(const Bucket& b) const;
/**
* Returns false if the cluster has been deemed down. This can happen
* if the fleet controller has detected that too many nodes are down
* compared to the complete list of nodes, and deigns the system to be
* unusable.
*/
bool clusterUp() const;
/**
* Returns false if this node has been set in a state where it should not
* receive external load.
*/
bool nodeUp() const;
/**
* Returns true iff this node is marked as Initializing in the cluster state.
*/
bool nodeInitializing() const;
/**
* Returns true iff this node is marked as Retired in the cluster state.
*/
bool nodeRetired() const;
/**
* Returns a serialized form of this object.
*/
void serialize(vespalib::nbostream& o) const;
private:
std::unique_ptr<lib::ClusterState> _state;
uint16_t _nodeIndex;
std::unique_ptr<lib::Distribution> _distribution;
void deserialize(vespalib::nbostream&);
bool nodeHasStateOneOf(const char* states) const;
};
}
}
|
