Golang strategy.Pool类代码示例

func (ap *availablePlugins) findLatestPool(pType, name string) (strategy.Pool, serror.SnapError) {
	// see if there exists a pool at all which matches name version.
	var latest strategy.Pool
	for key, pool := range ap.table {
		tnv := strings.Split(key, ":")
		if tnv[0] == pType && tnv[1] == name {
			latest = pool
			break
		}
	}
	if latest != nil {
		for key, pool := range ap.table {
			tnv := strings.Split(key, ":")
			if tnv[0] == pType && tnv[1] == name && pool.Version() > latest.Version() {
				latest = pool
			}
		}
		return latest, nil
	}

	return nil, nil
}

// Empty handler acting as placeholder until implementation. This helps tests
// pass to ensure registration works.
func (r *runner) HandleGomitEvent(e gomit.Event) {
	switch v := e.Body.(type) {
	case *control_event.DeadAvailablePluginEvent:
		runnerLog.WithFields(log.Fields{
			"_block":  "handle-events",
			"event":   v.Namespace(),
			"aplugin": v.String,
		}).Warning("handling dead available plugin event")
		pool, err := r.availablePlugins.getPool(v.Key)
		if err != nil {
			runnerLog.WithFields(log.Fields{
				"_block":  "handle-events",
				"aplugin": v.String,
			}).Error(err.Error())
			return
		}
		if pool != nil {
			pool.Kill(v.Id, "plugin dead")
		}
	case *control_event.PluginUnsubscriptionEvent:
		runnerLog.WithFields(log.Fields{
			"_block":         "subscribe-pool",
			"event":          v.Namespace(),
			"plugin-name":    v.PluginName,
			"plugin-version": v.PluginVersion,
			"plugin-type":    core.PluginType(v.PluginType).String(),
		}).Debug("handling plugin unsubscription event")

		err := r.handleUnsubscription(core.PluginType(v.PluginType).String(), v.PluginName, v.PluginVersion, v.TaskId)
		if err != nil {
			return
		}
	case *control_event.LoadPluginEvent:
		var pool strategy.Pool
		r.availablePlugins.RLock()
		for key, p := range r.availablePlugins.pools() {
			// tuple of type name and version
			// type @ index 0, name @ index 1, version @ index 2
			tnv := strings.Split(key, ":")
			// make sure we don't panic and crash the service if a junk key is retrieved
			if len(tnv) != 3 {
				runnerLog.WithFields(log.Fields{
					"_block":         "subscribe-pool",
					"event":          v.Namespace(),
					"plugin-name":    v.Name,
					"plugin-version": v.Version,
					"plugin-type":    core.PluginType(v.Type).String(),
					"plugin-signed":  v.Signed,
				}).Info("pool has bad key ", key)
				continue
			}

			// attempt to find a pool whose type and name are the same, and whose version is
			// less than newly loaded plugin.  If we find it, break out of loop.
			if core.PluginType(v.Type).String() == tnv[0] && v.Name == tnv[1] && v.Version > p.Version() {
				pool = p
				break
			}
		}
		r.availablePlugins.RUnlock()
		// now check to see if anything was put where pool points.
		// if not, there are no older pools whose subscriptions need to be
		// moved.
		if pool == nil {
			runnerLog.WithFields(log.Fields{
				"_block":         "subscribe-pool",
				"event":          v.Namespace(),
				"plugin-name":    v.Name,
				"plugin-version": v.Version,
				"plugin-type":    core.PluginType(v.Type).String(),
			}).Info("No previous pool found for loaded plugin")
			return
		}
		plugin, err := r.pluginManager.get(fmt.Sprintf("%s:%s:%d", core.PluginType(v.Type).String(), v.Name, v.Version))
		if err != nil {
			return
		}
		newPool, err := r.availablePlugins.getOrCreatePool(plugin.Key())
		if err != nil {
			return
		}

		subs := pool.MoveSubscriptions(newPool)
		if len(subs) != 0 {
			runnerLog.WithFields(log.Fields{
				"_block":         "subscribe-pool",
				"event":          v.Namespace(),
				"plugin-name":    v.Name,
				"plugin-version": v.Version,
				"plugin-type":    core.PluginType(v.Type).String(),
			}).Info("pool with subscriptions to move found")
			for _, sub := range subs {
				r.emitter.Emit(&control_event.PluginSubscriptionEvent{
					PluginName:       v.Name,
					PluginVersion:    v.Version,
					TaskId:           sub.TaskID,
					PluginType:       v.Type,
					SubscriptionType: int(strategy.UnboundSubscriptionType),
//.........这里部分代码省略.........

// Empty handler acting as placeholder until implementation. This helps tests
// pass to ensure registration works.
func (r *runner) HandleGomitEvent(e gomit.Event) {
	switch v := e.Body.(type) {
	case *control_event.DeadAvailablePluginEvent:
		runnerLog.WithFields(log.Fields{
			"_block":  "handle-events",
			"event":   v.Namespace(),
			"aplugin": v.String,
		}).Warning("handling dead available plugin event")

		pool, err := r.availablePlugins.getPool(v.Key)
		if err != nil {
			runnerLog.WithFields(log.Fields{
				"_block":  "handle-events",
				"aplugin": v.String,
			}).Error(err.Error())
			return
		}

		if pool != nil {
			pool.Kill(v.Id, "plugin dead")
		}

		if pool.Eligible() {
			if pool.RestartCount() < MaxPluginRestartCount {
				e := r.restartPlugin(v.Key)
				if e != nil {
					runnerLog.WithFields(log.Fields{
						"_block":  "handle-events",
						"aplugin": v.String,
					}).Error(e.Error())
					return
				}
				pool.IncRestartCount()

				runnerLog.WithFields(log.Fields{
					"_block":        "handle-events",
					"event":         v.Name,
					"aplugin":       v.Version,
					"restart_count": pool.RestartCount(),
				}).Warning("plugin restarted")

				r.emitter.Emit(&control_event.RestartedAvailablePluginEvent{
					Id:      v.Id,
					Name:    v.Name,
					Version: v.Version,
					Key:     v.Key,
					Type:    v.Type,
				})
			} else {
				r.emitter.Emit(&control_event.MaxPluginRestartsExceededEvent{
					Id:      v.Id,
					Name:    v.Name,
					Version: v.Version,
					Key:     v.Key,
					Type:    v.Type,
				})
			}
		}
	case *control_event.PluginUnsubscriptionEvent:
		runnerLog.WithFields(log.Fields{
			"_block":         "subscribe-pool",
			"event":          v.Namespace(),
			"plugin-name":    v.PluginName,
			"plugin-version": v.PluginVersion,
			"plugin-type":    core.PluginType(v.PluginType).String(),
		}).Debug("handling plugin unsubscription event")

		err := r.handleUnsubscription(core.PluginType(v.PluginType).String(), v.PluginName, v.PluginVersion, v.TaskId)
		if err != nil {
			return
		}
	case *control_event.UnloadPluginEvent:
		// On plugin unload,  find the key and pool info for the plugin being unloaded.
		r.availablePlugins.RLock()
		var pool strategy.Pool
		var k string
		for key, p := range r.availablePlugins.table {
			tnv := strings.Split(key, ":")
			if core.PluginType(v.Type).String() == tnv[0] && v.Name == tnv[1] && v.Version == p.Version() {
				pool = p
				k = key
				break
			}
		}

		r.availablePlugins.RUnlock()
		if pool == nil {
			return
		}
		// Check for the highest lower version plugin and move subscriptions that
		// are not bound to a plugin version to this pool.
		plugin, err := r.pluginManager.get(fmt.Sprintf("%s:%s:%d", core.PluginType(v.Type).String(), v.Name, -1))
		if err != nil {
			return
		}
		newPool, err := r.availablePlugins.getOrCreatePool(plugin.Key())
		if err != nil {
			return
//.........这里部分代码省略.........