本文整理汇总了Golang中github.com/youtube/vitess/go/vt/topo.Impl.UpdateTabletFields方法的典型用法代码示例。如果您正苦于以下问题：Golang Impl.UpdateTabletFields方法的具体用法？Golang Impl.UpdateTabletFields怎么用？Golang Impl.UpdateTabletFields使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类github.com/youtube/vitess/go/vt/topo.Impl的用法示例。
在下文中一共展示了Impl.UpdateTabletFields方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Golang代码示例。
示例1: CopyTablets
// CopyTablets will create the tablets in the destination topo
func CopyTablets(ctx context.Context, fromTS, toTS topo.Impl) {
cells, err := fromTS.GetKnownCells(ctx)
if err != nil {
log.Fatalf("fromTS.GetKnownCells: %v", err)
}
wg := sync.WaitGroup{}
rec := concurrency.AllErrorRecorder{}
for _, cell := range cells {
wg.Add(1)
go func(cell string) {
defer wg.Done()
tabletAliases, err := fromTS.GetTabletsByCell(ctx, cell)
if err != nil {
rec.RecordError(fmt.Errorf("GetTabletsByCell(%v): %v", cell, err))
} else {
for _, tabletAlias := range tabletAliases {
wg.Add(1)
go func(tabletAlias *topodatapb.TabletAlias) {
defer wg.Done()
// read the source tablet
tablet, _, err := fromTS.GetTablet(ctx, tabletAlias)
if err != nil {
rec.RecordError(fmt.Errorf("GetTablet(%v): %v", tabletAlias, err))
return
}
// try to create the destination
err = toTS.CreateTablet(ctx, tablet)
if err == topo.ErrNodeExists {
// update the destination tablet
log.Warningf("tablet %v already exists, updating it", tabletAlias)
_, err = toTS.UpdateTabletFields(ctx, tablet.Alias, func(t *topodatapb.Tablet) error {
*t = *tablet
return nil
})
}
if err != nil {
rec.RecordError(fmt.Errorf("CreateTablet(%v): %v", tabletAlias, err))
return
}
}(tabletAlias)
}
}
}(cell)
}
wg.Wait()
if rec.HasErrors() {
log.Fatalf("copyTablets failed: %v", rec.Error())
}
}示例2: CheckTablet
// CheckTablet verifies the topo server API is correct for managing tablets.
func CheckTablet(ctx context.Context, t *testing.T, ts topo.Impl) {
cell := getLocalCell(ctx, t, ts)
tablet := &topodatapb.Tablet{
Alias: &topodatapb.TabletAlias{Cell: cell, Uid: 1},
Hostname: "localhost",
Ip: "10.11.12.13",
PortMap: map[string]int32{
"vt": 3333,
"mysql": 3334,
},
Tags: map[string]string{"tag": "value"},
Keyspace: "test_keyspace",
Type: topodatapb.TabletType_MASTER,
KeyRange: newKeyRange("-10"),
}
if err := ts.CreateTablet(ctx, tablet); err != nil {
t.Errorf("CreateTablet: %v", err)
}
if err := ts.CreateTablet(ctx, tablet); err != topo.ErrNodeExists {
t.Errorf("CreateTablet(again): %v", err)
}
if _, _, err := ts.GetTablet(ctx, &topodatapb.TabletAlias{Cell: cell, Uid: 666}); err != topo.ErrNoNode {
t.Errorf("GetTablet(666): %v", err)
}
nt, nv, err := ts.GetTablet(ctx, tablet.Alias)
if err != nil {
t.Errorf("GetTablet %v: %v", tablet.Alias, err)
}
if eq, err := tabletEqual(nt, tablet); err != nil {
t.Errorf("cannot compare tablets: %v", err)
} else if !eq {
t.Errorf("put and got tablets are not identical:\n%#v\n%#v", tablet, t)
}
if _, err := ts.GetTabletsByCell(ctx, "666"); err != topo.ErrNoNode {
t.Errorf("GetTabletsByCell(666): %v", err)
}
inCell, err := ts.GetTabletsByCell(ctx, cell)
if err != nil {
t.Errorf("GetTabletsByCell: %v", err)
}
if len(inCell) != 1 || *inCell[0] != *tablet.Alias {
t.Errorf("GetTabletsByCell: want [%v], got %v", tablet.Alias, inCell)
}
nt.Hostname = "remotehost"
if _, err := ts.UpdateTablet(ctx, nt, nv); err != nil {
t.Errorf("UpdateTablet: %v", err)
}
nt, nv, err = ts.GetTablet(ctx, tablet.Alias)
if err != nil {
t.Errorf("GetTablet %v: %v", tablet.Alias, err)
}
if want := "remotehost"; nt.Hostname != want {
t.Errorf("nt.Hostname: want %v, got %v", want, nt.Hostname)
}
if _, err := ts.UpdateTabletFields(ctx, tablet.Alias, func(t *topodatapb.Tablet) error {
t.Hostname = "anotherhost"
return nil
}); err != nil {
t.Errorf("UpdateTabletFields: %v", err)
}
nt, nv, err = ts.GetTablet(ctx, tablet.Alias)
if err != nil {
t.Errorf("GetTablet %v: %v", tablet.Alias, err)
}
if want := "anotherhost"; nt.Hostname != want {
t.Errorf("nt.Hostname: want %v, got %v", want, nt.Hostname)
}
if err := ts.DeleteTablet(ctx, tablet.Alias); err != nil {
t.Errorf("DeleteTablet: %v", err)
}
if err := ts.DeleteTablet(ctx, tablet.Alias); err != topo.ErrNoNode {
t.Errorf("DeleteTablet(again): %v", err)
}
if _, _, err := ts.GetTablet(ctx, tablet.Alias); err != topo.ErrNoNode {
t.Errorf("GetTablet: expected error, tablet was deleted: %v", err)
}
}