/
one_to_one_envelope_v2.go
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/
one_to_one_envelope_v2.go
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package diodes
import (
gendiodes "code.cloudfoundry.org/go-diodes"
"code.cloudfoundry.org/go-loggregator/v9/rpc/loggregator_v2"
)
// OneToOneEnvelopeV2 diode is optimized for a single writer and a single reader
type OneToOneEnvelopeV2 struct {
d *gendiodes.Waiter
}
// NewOneToOneWaiterEnvelopeV2 initializes a new one to one diode for V2 envelopes
// of a given size and alerter. The alerter is called whenever data is dropped
// with an integer representing the number of V2 envelopes that were dropped.
func NewOneToOneWaiterEnvelopeV2(size int, alerter gendiodes.Alerter, opts ...gendiodes.WaiterConfigOption) *OneToOneEnvelopeV2 {
return &OneToOneEnvelopeV2{
d: gendiodes.NewWaiter(gendiodes.NewOneToOne(size, alerter), opts...),
}
}
// Set inserts the given V2 envelope into the diode.
func (d *OneToOneEnvelopeV2) Set(data *loggregator_v2.Envelope) {
d.d.Set(gendiodes.GenericDataType(data))
}
// TryNext returns the next V2 envelope to be read from the diode. If the
// diode is empty it will return a nil envelope and false for the bool.
func (d *OneToOneEnvelopeV2) TryNext() (*loggregator_v2.Envelope, bool) {
data, ok := d.d.TryNext()
if !ok {
return nil, ok
}
return (*loggregator_v2.Envelope)(data), true
}
// Next will return the next V2 envelope to be read from the diode. If the
// diode is empty this method will block until anenvelope is available to be
// read.
func (d *OneToOneEnvelopeV2) Next() *loggregator_v2.Envelope {
data := d.d.Next()
return (*loggregator_v2.Envelope)(data)
}