func getActions(zconn zk.Conn, actionPath string) ([]*tm.ActionNode, error) {
actions, _, err := zconn.Children(actionPath)
if err != nil {
return nil, fmt.Errorf("getActions failed: %v %v", actionPath, err)
}
sort.Strings(actions)
wg := sync.WaitGroup{}
mu := sync.Mutex{}
nodes := make([]*tm.ActionNode, 0, len(actions))
for _, action := range actions {
wg.Add(1)
go func(action string) {
defer wg.Done()
actionNodePath := path.Join(actionPath, action)
data, _, err := zconn.Get(actionNodePath)
if err != nil && !zookeeper.IsError(err, zookeeper.ZNONODE) {
log.Warningf("getActions: %v %v", actionNodePath, err)
return
}
actionNode, err := tm.ActionNodeFromJson(data, actionNodePath)
if err != nil {
log.Warningf("getActions: %v %v", actionNodePath, err)
return
}
mu.Lock()
nodes = append(nodes, actionNode)
mu.Unlock()
}(action)
}
wg.Wait()
return nodes, nil
}
// startFakeTabletActionLoop will start the action loop for a fake tablet,
// using mysqlDaemon as the backing mysqld.
func startFakeTabletActionLoop(t *testing.T, wr *Wrangler, tabletAlias topo.TabletAlias, mysqlDaemon mysqlctl.MysqlDaemon, done chan struct{}) {
go func() {
f := func(actionPath, data string) error {
actionNode, err := tm.ActionNodeFromJson(data, actionPath)
if err != nil {
t.Fatalf("ActionNodeFromJson failed: %v\n%v", err, data)
}
ta := tm.NewTabletActor(nil, mysqlDaemon, wr.ts, tabletAlias)
if err := ta.HandleAction(actionPath, actionNode.Action, actionNode.ActionGuid, false); err != nil {
// action may just fail for any good reason
t.Logf("HandleAction failed for %v: %v", actionNode.Action, err)
}
return nil
}
wr.ts.ActionEventLoop(tabletAlias, f, done)
}()
}
func staleActions(zkts *zktopo.Server, zkActionPath string, maxStaleness time.Duration) ([]*tm.ActionNode, error) {
// get the stale strings
actionNodes, err := zkts.StaleActions(zkActionPath, maxStaleness, tm.ActionNodeIsStale)
if err != nil {
return nil, err
}
// convert to ActionNode
staleActions := make([]*tm.ActionNode, len(actionNodes))
for i, actionNodeStr := range actionNodes {
actionNode, err := tm.ActionNodeFromJson(actionNodeStr, "")
if err != nil {
return nil, err
}
staleActions[i] = actionNode
}
return staleActions, nil
}