151 lines
3.4 KiB
Go
151 lines
3.4 KiB
Go
package simple
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import (
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"sync"
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"time"
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"dappco.re/go/core/proxy"
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"dappco.re/go/core/proxy/pool"
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)
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// SimpleMapper holds one outbound pool connection and serves at most one active miner
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// at a time. It becomes idle when the miner disconnects and may be reclaimed for the
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// next login.
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//
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// m := simple.NewSimpleMapper(id, strategy)
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type SimpleMapper struct {
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id int64
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miner *proxy.Miner // nil when idle
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strategy pool.Strategy
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events *proxy.EventBus
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pending map[int64]simpleSubmitContext
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job proxy.Job
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prevJob proxy.Job
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idleAt time.Time // zero when active
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stopped bool
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mu sync.Mutex
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}
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type simpleSubmitContext struct {
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RequestID int64
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Job proxy.Job
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Expired bool
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SubmittedAt time.Time
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}
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// NewSimpleMapper stores the mapper ID and strategy.
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//
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// mapper := simple.NewSimpleMapper(1, strategy)
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func NewSimpleMapper(id int64, strategy pool.Strategy) *SimpleMapper {
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return &SimpleMapper{id: id, strategy: strategy, pending: make(map[int64]simpleSubmitContext)}
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}
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func (m *SimpleMapper) OnJob(job proxy.Job) {
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if !job.IsValid() {
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return
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}
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m.mu.Lock()
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if m.job.IsValid() && m.job.ClientID != "" && m.job.ClientID == job.ClientID {
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m.prevJob = m.job
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} else {
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m.prevJob = proxy.Job{}
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}
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m.job = job
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miner := m.miner
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m.mu.Unlock()
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if miner != nil {
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miner.ForwardJob(job, job.Algo)
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}
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}
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func (m *SimpleMapper) JobStatus(id string) (valid bool, expired bool) {
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_, valid, expired = m.JobForID(id)
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return valid, expired
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}
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func (m *SimpleMapper) JobForID(id string) (proxy.Job, bool, bool) {
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m.mu.Lock()
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defer m.mu.Unlock()
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if id == "" {
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return proxy.Job{}, false, false
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}
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if id == m.job.JobID {
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return m.job, true, false
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}
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if m.prevJob.IsValid() && m.prevJob.ClientID != "" && id == m.prevJob.JobID {
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return m.prevJob, true, true
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}
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return proxy.Job{}, false, false
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}
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func (m *SimpleMapper) OnResultAccepted(sequence int64, accepted bool, errorMessage string) {
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m.mu.Lock()
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context, exists := m.pending[sequence]
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miner := m.miner
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if !exists {
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m.mu.Unlock()
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return
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}
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delete(m.pending, sequence)
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m.mu.Unlock()
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if miner == nil {
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return
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}
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shareDifficulty := context.Job.DifficultyFromTarget()
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if shareDifficulty == 0 {
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shareDifficulty = miner.Diff()
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}
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if accepted {
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latency := shareLatency(context.SubmittedAt)
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if m.events != nil {
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m.events.Dispatch(proxy.Event{Type: proxy.EventAccept, Miner: miner, Job: jobPointer(context.Job), Diff: shareDifficulty, Latency: latency, Expired: context.Expired})
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}
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miner.Success(context.RequestID, "OK")
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return
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}
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latency := shareLatency(context.SubmittedAt)
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if m.events != nil {
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m.events.Dispatch(proxy.Event{Type: proxy.EventReject, Miner: miner, Job: jobPointer(context.Job), Diff: shareDifficulty, Error: errorMessage, Latency: latency, Expired: context.Expired})
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}
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miner.ReplyWithError(context.RequestID, errorMessage)
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}
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func (m *SimpleMapper) OnDisconnect() {
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m.clearPending()
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m.stopped = true
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}
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func (m *SimpleMapper) clearPending() {
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m.mu.Lock()
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m.pending = make(map[int64]simpleSubmitContext)
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m.mu.Unlock()
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}
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func jobPointer(job proxy.Job) *proxy.Job {
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if !job.IsValid() {
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return nil
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}
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jobCopy := job
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return &jobCopy
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}
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func shareLatency(submittedAt time.Time) uint16 {
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if submittedAt.IsZero() {
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return 0
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}
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elapsed := time.Since(submittedAt).Milliseconds()
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if elapsed <= 0 {
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return 0
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}
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if elapsed > int64(^uint16(0)) {
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return ^uint16(0)
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}
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return uint16(elapsed)
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}
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