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Golang Impl.GetTablet方法代码示例

本文整理汇总了Golang中github.com/youtube/vitess/go/vt/topo.Impl.GetTablet方法的典型用法代码示例。如果您正苦于以下问题：Golang Impl.GetTablet方法的具体用法？Golang Impl.GetTablet怎么用？Golang Impl.GetTablet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.GetTablet方法的3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)
	}
	tts := topo.Server{
		Impl: toTS,
	}

	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 = tts.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())
	}
}
开发者ID:littleyang，项目名称:vitess，代码行数:56，代码来源:copy.go

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) {
	tts := topo.Server{Impl: ts}

	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)
	}

	// unconditional tablet update
	nt.Hostname = "remotehost2"
	if _, err := ts.UpdateTablet(ctx, nt, -1); err != nil {
		t.Errorf("UpdateTablet(-1): %v", err)
	}

	nt, nv, err = ts.GetTablet(ctx, tablet.Alias)
	if err != nil {
		t.Errorf("GetTablet %v: %v", tablet.Alias, err)
	}
	if want := "remotehost2"; nt.Hostname != want {
		t.Errorf("nt.Hostname: want %v, got %v", want, nt.Hostname)
	}

	// test UpdateTabletFields works
	updatedTablet, err := tts.UpdateTabletFields(ctx, tablet.Alias, func(t *topodatapb.Tablet) error {
		t.Hostname = "anotherhost"
		return nil
	})
	if err != nil {
		t.Errorf("UpdateTabletFields: %v", err)
	}
	if got, want := updatedTablet.Hostname, "anotherhost"; got != want {
		t.Errorf("updatedTablet.Hostname = %q, want %q", got, want)
	}
	nt, nv, err = ts.GetTablet(ctx, tablet.Alias)
	if err != nil {
		t.Errorf("GetTablet %v: %v", tablet.Alias, err)
	}
	if got, want := nt.Hostname, "anotherhost"; got != want {
		t.Errorf("nt.Hostname = %q, want %q", got, want)
	}

	// test UpdateTabletFields that returns ErrNoUpdateNeeded works
	if _, err := tts.UpdateTabletFields(ctx, tablet.Alias, func(t *topodatapb.Tablet) error {
//.........这里部分代码省略.........
开发者ID:littleyang，项目名称:vitess，代码行数:101，代码来源:tablet.go

示例3: 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 := &pb.Tablet{
		Alias:    &pb.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:     pb.TabletType_MASTER,
		KeyRange: newKeyRange3("-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, &pb.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 *pb.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)
	}

}
开发者ID:richarwu，项目名称:vitess，代码行数:90，代码来源:tablet.go


注：本文中的github.com/youtube/vitess/go/vt/topo.Impl.GetTablet方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。