forked from wrenn/wrenn
Rafeed M. Bhuiyan
d3e4812e46
Co-authored-by: Tasnim Kabir Sadik <tksadik92@gmail.com> Reviewed-on: wrenn/sandbox#8
52 lines
1.2 KiB
Go
52 lines
1.2 KiB
Go
// SPDX-License-Identifier: Apache-2.0
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package port
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import (
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"github.com/rs/zerolog"
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)
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// If we want to create a listener/subscriber pattern somewhere else we should move
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// from a concrete implementation to combination of generics and interfaces.
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type ScannerSubscriber struct {
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logger *zerolog.Logger
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filter *ScannerFilter
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Messages chan ([]ConnStat)
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id string
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}
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func NewScannerSubscriber(logger *zerolog.Logger, id string, filter *ScannerFilter) *ScannerSubscriber {
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return &ScannerSubscriber{
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logger: logger,
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id: id,
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filter: filter,
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Messages: make(chan []ConnStat),
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}
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}
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func (ss *ScannerSubscriber) ID() string {
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return ss.id
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}
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func (ss *ScannerSubscriber) Destroy() {
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close(ss.Messages)
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}
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func (ss *ScannerSubscriber) Signal(conns []ConnStat) {
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// Filter isn't specified. Accept everything.
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if ss.filter == nil {
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ss.Messages <- conns
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} else {
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filtered := []ConnStat{}
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for i := range conns {
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// We need to access the list directly otherwise there will be implicit memory aliasing
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// If the filter matched a connection, we will send it to a channel.
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if ss.filter.Match(&conns[i]) {
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filtered = append(filtered, conns[i])
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}
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}
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ss.Messages <- filtered
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}
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}
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