49 lines
1.6 KiB
Go
49 lines
1.6 KiB
Go
package httpserver
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// HubOptions 是节点内 Worker/Event WebSocket Hub 的有界运行参数。
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// 这些参数只控制本节点内存和领取并发，不改变 MySQL 中的授权、租约或配额事实。
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type HubOptions struct {
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// ConnectionLimit 是该 Hub 允许的同时连接数；超过后返回 429。
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ConnectionLimit int
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// DispatchWorkers 是本 Hub 同时执行数据库领取调用的 Go 协程上限。
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DispatchWorkers int
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// DispatchCapacity 是领取调用的有界内存排队槽位；满额时连接等待下一轮扫描。
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DispatchCapacity int
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}
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const (
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defaultHubConnectionLimit = 128
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defaultHubDispatchWorkers = 4
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defaultHubDispatchCapacity = 128
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maxHubConnectionLimit = 4096
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maxHubDispatchWorkers = 256
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maxHubDispatchCapacity = 65536
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)
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func resolveHubOptions(options []HubOptions) HubOptions {
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out := HubOptions{
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ConnectionLimit: defaultHubConnectionLimit,
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DispatchWorkers: defaultHubDispatchWorkers,
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DispatchCapacity: defaultHubDispatchCapacity,
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}
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if len(options) > 1 {
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panic("at most one HubOptions value is allowed")
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}
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if len(options) == 1 {
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in := options[0]
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if in.ConnectionLimit != 0 {
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out.ConnectionLimit = in.ConnectionLimit
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}
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if in.DispatchWorkers != 0 {
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out.DispatchWorkers = in.DispatchWorkers
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}
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if in.DispatchCapacity != 0 {
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out.DispatchCapacity = in.DispatchCapacity
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}
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}
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if out.ConnectionLimit < 1 || out.ConnectionLimit > maxHubConnectionLimit || out.DispatchWorkers < 1 || out.DispatchWorkers > maxHubDispatchWorkers || out.DispatchCapacity < 1 || out.DispatchCapacity > maxHubDispatchCapacity {
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panic("HubOptions values exceed bounded range")
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}
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return out
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}
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