56 lines
1.9 KiB
Go
56 lines
1.9 KiB
Go
package ICCC
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import (
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"github.com/SommerEngineering/Ocean/ICCC/Scheme"
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"github.com/SommerEngineering/Ocean/Log"
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LM "github.com/SommerEngineering/Ocean/Log/Meta"
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"github.com/SommerEngineering/Ocean/Tools"
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)
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// Function to write a message to any listener.
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func WriteMessage2Any(channel, command string, message interface{}, answerPrototype interface{}) (result interface{}) {
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cacheListenerDatabaseLock.RLock()
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defer cacheListenerDatabaseLock.RUnlock()
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// Convert the message to HTTP data:
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data := Message2Data(channel, command, message)
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maxCount := cacheListenerDatabase.Len()
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entries := make([]Scheme.Listener, 0, maxCount)
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counter := 0
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// Loop over all listeners which are currently present at the cache:
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for entry := cacheListenerDatabase.Front(); entry != nil; entry = entry.Next() {
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listener := entry.Value.(Scheme.Listener)
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// If the channel and the command matches, store the listener:
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if listener.Channel == channel && listener.Command == command {
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entries = entries[:len(entries)+1]
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entries[counter] = listener
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}
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}
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count := len(entries)
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if count > 0 {
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//
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// Case: Find at least one possible listener.
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//
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// Case: There is only 1 listener
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if len(entries) == 1 {
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listener := entries[0]
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answersData := sendMessage(listener, data)
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_, _, result = Data2Message(answerPrototype, answersData)
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} else {
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// Case: Multiple listeners are available. Choose a random one and deliver:
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listener := entries[Tools.RandomInteger(count)]
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answersData := sendMessage(listener, data)
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_, _, result = Data2Message(answerPrototype, answersData)
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}
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} else {
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// Case: Find no listener at all.
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Log.LogFull(senderName, LM.CategorySYSTEM, LM.LevelWARN, LM.SeverityCritical, LM.ImpactUnknown, LM.MessageNameCONFIGURATION, `It was not able to deliver this message to any listener, because no listener was found!`, `channel=`+channel, `command=`+command)
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}
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return
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}
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