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35 lines
1.0 KiB
35 lines
1.0 KiB
package consensus
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import (
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"github.com/tendermint/tendermint/types"
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)
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// XXX: WARNING: these functions can halt the consensus as firing events is synchronous.
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// Make sure to read off the channels, and in the case of subscribeToEventRespond, to write back on it
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// NOTE: if chanCap=0, this blocks on the event being consumed
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func subscribeToEvent(evsw types.EventSwitch, receiver, eventID string, chanCap int) chan interface{} {
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// listen for event
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ch := make(chan interface{}, chanCap)
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types.AddListenerForEvent(evsw, receiver, eventID, func(data types.TMEventData) {
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ch <- data
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})
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return ch
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}
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// NOTE: this blocks on receiving a response after the event is consumed
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func subscribeToEventRespond(evsw types.EventSwitch, receiver, eventID string) chan interface{} {
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// listen for event
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ch := make(chan interface{})
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types.AddListenerForEvent(evsw, receiver, eventID, func(data types.TMEventData) {
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ch <- data
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<-ch
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})
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return ch
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}
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func discardFromChan(ch chan interface{}, n int) {
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for i := 0; i < n; i++ {
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<-ch
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}
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}
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