mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
abb20ec51f
This commit lets etcdserver skip needless log entry applying. If the result of log applying isn't required by the node (client that issued the request isn't talking with the node) and the operation has no side effects, applying can be skipped. It would contribute to reduce disk I/O on followers and be useful for a cluster that processes much serializable get.
103 lines
2.1 KiB
Go
103 lines
2.1 KiB
Go
// Copyright 2015 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package wait
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import (
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"fmt"
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"testing"
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"time"
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)
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func TestWait(t *testing.T) {
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const eid = 1
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wt := New()
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ch := wt.Register(eid)
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wt.Trigger(eid, "foo")
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v := <-ch
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if g, w := fmt.Sprintf("%v (%T)", v, v), "foo (string)"; g != w {
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t.Errorf("<-ch = %v, want %v", g, w)
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}
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if g := <-ch; g != nil {
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t.Errorf("unexpected non-nil value: %v (%T)", g, g)
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}
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}
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func TestRegisterDupPanic(t *testing.T) {
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const eid = 1
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wt := New()
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ch1 := wt.Register(eid)
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panicC := make(chan struct{}, 1)
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func() {
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defer func() {
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if r := recover(); r != nil {
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panicC <- struct{}{}
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}
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}()
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wt.Register(eid)
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}()
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select {
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case <-panicC:
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case <-time.After(1 * time.Second):
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t.Errorf("failed to receive panic")
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}
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wt.Trigger(eid, "foo")
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<-ch1
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}
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func TestTriggerDupSuppression(t *testing.T) {
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const eid = 1
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wt := New()
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ch := wt.Register(eid)
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wt.Trigger(eid, "foo")
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wt.Trigger(eid, "bar")
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v := <-ch
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if g, w := fmt.Sprintf("%v (%T)", v, v), "foo (string)"; g != w {
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t.Errorf("<-ch = %v, want %v", g, w)
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}
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if g := <-ch; g != nil {
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t.Errorf("unexpected non-nil value: %v (%T)", g, g)
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}
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}
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func TestIsRegistered(t *testing.T) {
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wt := New()
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wt.Register(0)
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wt.Register(1)
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wt.Register(2)
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for i := uint64(0); i < 3; i++ {
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if !wt.IsRegistered(i) {
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t.Errorf("event ID %d isn't registered", i)
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}
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}
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if wt.IsRegistered(4) {
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t.Errorf("event ID 4 shouldn't be registered")
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}
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wt.Trigger(0, "foo")
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if wt.IsRegistered(0) {
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t.Errorf("event ID 0 is already triggered, shouldn't be registered")
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}
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}
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