mirror of
https://github.com/HDT3213/godis.git
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bf7f628810
wip: raft does not care about migrating wip: optimize code wip: raft election wip wip: fix raft leader missing log entries wip fix a dead lock batch set slot route wip: raft persist wip refactor cluster suite remove relay rename relay2 refactor: allow customizing client factory test raft refactor re-balance avoid errors caused by inconsistent status on follower nodes during raft commits test raft election
59 lines
1.4 KiB
Go
59 lines
1.4 KiB
Go
package cluster
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import (
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"github.com/hdt3213/godis/redis/protocol"
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"hash/crc32"
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"strings"
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"time"
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)
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// Slot represents a hash slot, used in cluster internal messages
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type Slot struct {
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// ID is uint between 0 and 16383
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ID uint32
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// NodeID is id of the hosting node
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// If the slot is migrating, NodeID is the id of the node importing this slot (target node)
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NodeID string
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// Flags stores more information of slot
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Flags uint32
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}
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// getPartitionKey extract hashtag
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func getPartitionKey(key string) string {
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beg := strings.Index(key, "{")
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if beg == -1 {
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return key
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}
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end := strings.Index(key, "}")
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if end == -1 || end == beg+1 {
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return key
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}
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return key[beg+1 : end]
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}
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func getSlot(key string) uint32 {
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partitionKey := getPartitionKey(key)
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return crc32.ChecksumIEEE([]byte(partitionKey)) % uint32(slotCount)
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}
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// Node represents a node and its slots, used in cluster internal messages
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type Node struct {
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ID string
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Addr string
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Slots []*Slot // ascending order by slot id
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Flags uint32
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lastHeard time.Time
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}
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type topology interface {
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GetSelfNodeID() string
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GetNodes() []*Node // return a copy
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GetNode(nodeID string) *Node
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GetSlots() []*Slot
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StartAsSeed(addr string) protocol.ErrorReply
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SetSlot(slotIDs []uint32, newNodeID string) protocol.ErrorReply
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LoadConfigFile() protocol.ErrorReply
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Join(seed string) protocol.ErrorReply
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Close() error
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}
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