{"action":"created","comment":{"url":"https://api.github.com/repos/youtube/vitess/pulls/comments/81774340","pull_request_review_id":2723338,"id":81774340,"diff_hunk":"@@ -0,0 +1,355 @@\n+package workflow\n+\n+import (\n+\t\"encoding/json\"\n+\t\"fmt\"\n+\t\"path\"\n+\t\"strings\"\n+\t\"sync\"\n+\t\"time\"\n+\n+\tlog \"github.com/golang/glog\"\n+\t\"golang.org/x/net/context\"\n+\n+\t\"github.com/youtube/vitess/go/vt/topo\"\n+\n+\tworkflowpb \"github.com/youtube/vitess/go/vt/proto/workflow\"\n+)\n+\n+// This file contains the necessary object definitions and interfaces\n+// to expose a workflow display to the vtctld webapp.\n+//\n+// Most constants and variable names should match the Node object described in\n+// web/vtctld2/src/app/workflows/node.ts as it is exposed as JSON to\n+// the angular2 web app.\n+\n+// NodeDisplay constants need to match node.ts.Display.\n+type NodeDisplay int\n+\n+const (\n+\t// NodeDisplayIndeterminate is a progress bar that doesn't have\n+\t// a current value, but just shows movement.\n+\tNodeDisplayIndeterminate NodeDisplay = 0\n+\n+\t// NodeDisplayDeterminate is a progress bar driven by the\n+\t// Progress field.\n+\tNodeDisplayDeterminate NodeDisplay = 1\n+\n+\t// NodeDisplayNone shows no progress bar or status.\n+\tNodeDisplayNone NodeDisplay = 2\n+)\n+\n+// ActionState constants need to match node.ts.ActionState.\n+type ActionState int\n+\n+const (\n+\t// ActionStateEnabled is for when the action is enabled.\n+\tActionStateEnabled ActionState = 0\n+\n+\t// ActionStateDisabled is for when the action is disabled.\n+\tActionStateDisabled ActionState = 1\n+)\n+\n+// ActionStyle constants need to match node.ts.ActionStyle.\n+type ActionStyle int\n+\n+const (\n+\t// ActionStyleNormal will just trigger the action.\n+\tActionStyleNormal ActionStyle = 0\n+\n+\t// ActionStyleWarning will display a warning dialog to confirm\n+\t// action with Action.Message.\n+\tActionStyleWarning ActionStyle = 1\n+\n+\t// ActionStyleWaiting highlights to the user that the process\n+\t// is waiting on action.\n+\tActionStyleWaiting ActionStyle = 2\n+\n+\t// ActionStyleTriggered is a state where button is greyed out\n+\t// and cannot be pressed.\n+\tActionStyleTriggered ActionStyle = 3\n+)\n+\n+// Node is the UI representation of a Workflow toplevel object, or of\n+// a Workflow task. It is just meant to be a tree, and the various\n+// Workflow implementations can expose a tree of Nodes that represent\n+// what they are doing.\n+//\n+// It should match the Node object described in\n+// web/vtctld2/src/app/workflows/node.ts as it is exposed as JSON to\n+// the angular2 web app.\n+type Node struct {\n+\t// manager is the NodeManager handling this Node.\n+\t// It is set by AddRootNode, and propagated by AddChild.\n+\t// Any change to this node must take the Manager's lock.\n+\tmanager *NodeManager\n+\n+\t// workflow is the workflow which owns this node.\n+\tworkflow Workflow\n+\n+\t// insideModify is a marker set by the Modify method.\n+\t// It is checked by methods that need to be called inside Modify.\n+\tinsideModify bool\n+\n+\t// Next are all the attributes that are exported to node.ts.\n+\n+\tName            string                   `json:\"name\"`\n+\tPath            string                   `json:\"path\"`\n+\tChildren        []*Node                  `json:\"children\"`\n+\tLastChanged     int64                    `json:\"lastChanged\"`\n+\tProgress        int                      `json:\"progress\"`\n+\tProgressMessage string                   `json:\"progressMsg\"`\n+\tState           workflowpb.WorkflowState `json:\"state\"`\n+\tDisplay         NodeDisplay              `json:\"display\"`\n+\tMessage         string                   `json:\"message\"`\n+\tLog             string                   `json:\"log\"`\n+\tDisabled        bool                     `json:\"disabled\"`\n+\tActions         []*Action                `json:\"actions\"`\n+}\n+\n+// Action must match node.ts Action.\n+type Action struct {\n+\tName    string      `json:\"name\"`\n+\tState   ActionState `json:\"state\"`\n+\tStyle   ActionStyle `json:\"style\"`\n+\tMessage string      `json:\"message\"`\n+}\n+\n+// Update is the data structure we send on the websocket to the clients.\n+type Update struct {\n+\t// Nodes is a list of nodes to update.\n+\tNodes []*Node `json:\"nodes\"`\n+\n+\t// Deletes is a list of toplevel paths to delete.\n+\tDeletes []string `json:\"deletes\"`\n+\n+\t// FullUpdate is set to true if this is a full refresh of the data.\n+\tFullUpdate bool `json:\"fullUpdate\"`\n+}\n+\n+// NewToplevelNode returns a UI Node matching the toplevel workflow.\n+func NewToplevelNode(wi *topo.WorkflowInfo, w Workflow) *Node {\n+\treturn &Node{\n+\t\tworkflow: w,\n+\n+\t\tName:        wi.Name,\n+\t\tPath:        \"/\" + wi.Uuid,\n+\t\tChildren:    []*Node{},\n+\t\tLastChanged: time.Now().Unix(),\n+\t}\n+}\n+\n+// Modify executes the makeChanges function while the node is locked.\n+// FIXME(alainjobart) if the Children change, we need to notify the\n+// watchers by sending the new children.\n+func (n *Node) Modify(makeChanges func()) {\n+\tn.manager.mu.Lock()\n+\tdefer n.manager.mu.Unlock()\n+\tn.insideModify = true\n+\tmakeChanges()\n+\tn.insideModify = false\n+\tn.LastChanged = time.Now().Unix()\n+\tn.broadcast()\n+}\n+\n+// broadcast sends the new value of the node to the watchers.\n+// Has to be called with the manager lock.\n+func (n *Node) broadcast() {\n+\tu := &Update{\n+\t\tNodes: []*Node{n},\n+\t}\n+\tn.manager.broadcastUpdate(u)\n+}\n+\n+// AddChild is a helper method to add a child to the current Node.\n+// It must be called within Modify's makeChanges method.\n+func (n *Node) AddChild(relativePath string) (*Node, error) {\n+\tif !n.insideModify {\n+\t\treturn nil, fmt.Errorf(\"AddChild must be called within Modify\")\n+\t}\n+\tfullPath := path.Join(n.Path, relativePath)\n+\n+\tfor _, child := range n.Children {\n+\t\tif child.Path == fullPath {\n+\t\t\treturn nil, fmt.Errorf(\"node %v already has a child name %v\", n.Path, relativePath)\n+\t\t}\n+\t}\n+\n+\tchild := &Node{\n+\t\tmanager:  n.manager,\n+\t\tPath:     fullPath,\n+\t\tworkflow: n.workflow,","path":"go/vt/workflow/node.go","position":181,"original_position":181,"commit_id":"f5955fdbac8580d870be845dacd186608cc0c318","original_commit_id":"f5955fdbac8580d870be845dacd186608cc0c318","user":{"login":"alainjobart","id":4625714,"avatar_url":"https://avatars.githubusercontent.com/u/4625714?v=3","gravatar_id":"","url":"https://api.github.com/users/alainjobart","html_url":"https://github.com/alainjobart","followers_url":"https://api.github.com/users/alainjobart/followers","following_url":"https://api.github.com/users/alainjobart/following{/other_user}","gists_url":"https://api.github.com/users/alainjobart/gists{/gist_id}","starred_url":"https://api.github.com/users/alainjobart/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/alainjobart/subscriptions","organizations_url":"https://api.github.com/users/alainjobart/orgs","repos_url":"https://api.github.com/users/alainjobart/repos","events_url":"https://api.github.com/users/alainjobart/events{/privacy}","received_events_url":"https://api.github.com/users/alainjobart/received_events","type":"User","site_admin":false},"body":"Done.","created_at":"2016-10-04T14:49:23Z","updated_at":"2016-10-04T15:01:33Z","html_url":"https://github.com/youtube/vitess/pull/2100#discussion_r81774340","pull_request_url":"https://api.github.com/repos/youtube/vitess/pulls/2100","_links":{"self":{"href":"https://api.github.com/repos/youtube/vitess/pulls/comments/81774340"},"html":{"href":"https://github.com/youtube/vitess/pull/2100#discussion_r81774340"},"pull_request":{"href":"https://api.github.com/repos/youtube/vitess/pulls/2100"}}},"pull_request":{"url":"https://api.github.com/repos/youtube/vitess/pulls/2100","id":87742121,"html_url":"https://github.com/youtube/vitess/pull/2100","diff_url":"https://github.com/youtube/vitess/pull/2100.diff","patch_url":"https://github.com/youtube/vitess/pull/2100.patch","issue_url":"https://api.github.com/repos/youtube/vitess/issues/2100","number":2100,"state":"open","locked":false,"title":"Adding workflow library.","user":{"login":"alainjobart","id":4625714,"avatar_url":"https://avatars.githubusercontent.com/u/4625714?v=3","gravatar_id":"","url":"https://api.github.com/users/alainjobart","html_url":"https://github.com/alainjobart","followers_url":"https://api.github.com/users/alainjobart/followers","following_url":"https://api.github.com/users/alainjobart/following{/other_user}","gists_url":"https://api.github.com/users/alainjobart/gists{/gist_id}","starred_url":"https://api.github.com/users/alainjobart/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/alainjobart/subscriptions","organizations_url":"https://api.github.com/users/alainjobart/orgs","repos_url":"https://api.github.com/users/alainjobart/repos","events_url":"https://api.github.com/users/alainjobart/events{/privacy}","received_events_url":"https://api.github.com/users/alainjobart/received_events","type":"User","site_admin":false},"body":"To manage long running workflows within Vitess.\r\nIt contains a sample Sleep workflow.\r\nWiring up the UI using WebSockets.\r\nAlso adding vtctl commands.","created_at":"2016-10-03T15:55:44Z","updated_at":"2016-10-04T15:01:33Z","closed_at":null,"merged_at":null,"merge_commit_sha":"ea758dcc1f0e3d9ebed599bec0841e50cc6e007c","assignee":{"login":"michael-berlin","id":3919251,"avatar_url":"https://avatars.githubusercontent.com/u/3919251?v=3","gravatar_id":"","url":"https://api.github.com/users/michael-berlin","html_url":"https://github.com/michael-berlin","followers_url":"https://api.github.com/users/michael-berlin/followers","following_url":"https://api.github.com/users/michael-berlin/following{/other_user}","gists_url":"https://api.github.com/users/michael-berlin/gists{/gist_id}","starred_url":"https://api.github.com/users/michael-berlin/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/michael-berlin/subscriptions","organizations_url":"https://api.github.com/users/michael-berlin/orgs","repos_url":"https://api.github.com/users/michael-berlin/repos","events_url":"https://api.github.com/users/michael-berlin/events{/privacy}","received_events_url":"https://api.github.com/users/michael-berlin/received_events","type":"User","site_admin":false},"assignees":[{"login":"michael-berlin","id":3919251,"avatar_url":"https://avatars.githubusercontent.com/u/3919251?v=3","gravatar_id":"","url":"https://api.github.com/users/michael-berlin","html_url":"https://github.com/michael-berlin","followers_url":"https://api.github.com/users/michael-berlin/followers","following_url":"https://api.github.com/users/michael-berlin/following{/other_user}","gists_url":"https://api.github.com/users/michael-berlin/gists{/gist_id}","starred_url":"https://api.github.com/users/michael-berlin/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/michael-berlin/subscriptions","organizations_url":"https://api.github.com/users/michael-berlin/orgs","repos_url":"https://api.github.com/users/michael-berlin/repos","events_url":"https://api.github.com/users/michael-berlin/events{/privacy}","received_events_url":"https://api.github.com/users/michael-berlin/received_events","type":"User","site_admin":false}],"milestone":null,"commits_url":"https://api.github.com/repos/youtube/vitess/pulls/2100/commits","review_comments_url":"https://api.github.com/repos/youtube/vitess/pulls/2100/comments","review_comment_url":"https://api.github.com/repos/youtube/vitess/pulls/comments{/number}","comments_url":"https://api.github.com/repos/youtube/vitess/issues/2100/comments","statuses_url":"https://api.github.com/repos/youtube/vitess/statuses/f5955fdbac8580d870be845dacd186608cc0c318","head":{"label":"alainjobart:workflowmanager","ref":"workflowmanager","sha":"f5955fdbac8580d870be845dacd186608cc0c318","user":{"login":"alainjobart","id":4625714,"avatar_url":"https://avatars.githubusercontent.com/u/4625714?v=3","gravatar_id":"","url":"https://api.github.com/users/alainjobart","html_url":"https://github.com/alainjobart","followers_url":"https://api.github.com/users/alainjobart/followers","following_url":"https://api.github.com/users/alainjobart/following{/other_user}","gists_url":"https://api.github.com/users/alainjobart/gists{/gist_id}","starred_url":"https://api.github.com/users/alainjobart/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/alainjobart/subscriptions","organizations_url":"https://api.github.com/users/alainjobart/orgs","repos_url":"https://api.github.com/users/alainjobart/repos","events_url":"https://api.github.com/users/alainjobart/events{/privacy}","received_events_url":"https://api.github.com/users/alainjobart/received_events","type":"User","site_admin":false},"repo":{"id":37342150,"name":"vitess","full_name":"alainjobart/vitess","owner":{"login":"alainjobart","id":4625714,"avatar_url":"https://avatars.githubusercontent.com/u/4625714?v=3","gravatar_id":"","url":"https://api.github.com/users/alainjobart","html_url":"https://github.com/alainjobart","followers_url":"https://api.github.com/users/alainjobart/followers","following_url":"https://api.github.com/users/alainjobart/following{/other_user}","gists_url":"https://api.github.com/users/alainjobart/gists{/gist_id}","starred_url":"https://api.github.com/users/alainjobart/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/alainjobart/subscriptions","organizations_url":"https://api.github.com/users/alainjobart/orgs","repos_url":"https://api.github.com/users/alainjobart/repos","events_url":"https://api.github.com/users/alainjobart/events{/privacy}","received_events_url":"https://api.github.com/users/alainjobart/received_events","type":"User","site_admin":false},"private":false,"html_url":"https://github.com/alainjobart/vitess","description":"vitess 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