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sink_status.go
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/
sink_status.go
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/*
* Copyright 2014-2015 Jason Woods.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package endpoint
// markActive marks an idle endpoint as active and puts it on the ready list
func (s *Sink) markActive(endpoint *Endpoint, observer Observer) {
// Ignore if not idle
if !endpoint.IsIdle() {
return
}
log.Debug("[%s] Endpoint is ready", endpoint.Server())
endpoint.mutex.Lock()
endpoint.status = endpointStatusActive
endpoint.mutex.Unlock()
s.readyList.PushBack(&endpoint.readyElement)
observer.OnStarted(endpoint)
}
// moveFailed stores the endpoint on the failed list, removing it from the
// ready list so no more events are sent to it
func (s *Sink) moveFailed(endpoint *Endpoint, observer Observer) {
// Should never get here if we're closed, caller should check
if !endpoint.IsAlive() && !endpoint.IsClosing() {
return
}
log.Info("[%s] Marking endpoint as failed", endpoint.Server())
s.ClearTimeout(&endpoint.Timeout)
if endpoint.IsActive() {
s.readyList.Remove(&endpoint.readyElement)
}
shutdown := endpoint.IsClosing()
endpoint.mutex.Lock()
endpoint.status = endpointStatusFailed
endpoint.averageLatency = 0
endpoint.mutex.Unlock()
s.failedList.PushFront(&endpoint.failedElement)
// endpoint.ForceFailure has no observer and calls with nil
if observer != nil {
observer.OnFail(endpoint)
}
// If we're shutting down, give up and complete transport shutdown
if shutdown {
endpoint.shutdownTransport()
}
}
// recoverFailed removes an endpoint from the failed list and marks it active
func (s *Sink) recoverFailed(endpoint *Endpoint, observer Observer) {
// Ignore if we haven't failed
if !endpoint.IsFailed() {
return
}
endpoint.mutex.Lock()
endpoint.status = endpointStatusIdle
endpoint.mutex.Unlock()
s.failedList.Remove(&endpoint.failedElement)
backoff := endpoint.backoff.Trigger()
log.Info("[%s] Endpoint has recovered - will resume in %v", endpoint.Server(), backoff)
// Backoff before allowing recovery
s.RegisterTimeout(
&endpoint.Timeout,
backoff,
func() {
s.markActive(endpoint, observer)
},
)
}