feat(@embark/api): Add command `service api on/off`

Add support for `service api on/off` commands.

Deprecate commands `api start/stop` in favor of `service api on/off`.

`service api on` - Enables the API server serving Cockpit. Shows an error if the API server is already starting or started.

`service api off` - Disables the API server serving Cockpit. Shows an error if the API server is already stopping or stopped.

`api start` - This command has been deprecated in favor of `service api on` and will be removed in future versions.

`api stop` - This command has been deprecated in favor of `service api off` and will be removed in future versions.

`api:start` - This event has been deprecated and will be removed in future versions.

`api:stop` - This event has been deprecated and will be removed in future versions.

packages/embark-api/src/index.ts

@@ -11,6 +11,7 @@ export default class Api {
   private port!: number;
   private api!: Server;
   private apiUrl!: string;
+  private isServiceRegistered = false;
 
   constructor(private embark: Embark, private options: any) {
     this.embark.events.emit("status", __("Starting API & Cockpit UI"));
@@ -22,7 +23,11 @@ export default class Api {
 
       this.listenToCommands();
       this.registerConsoleCommands();
+      this.init();
+    });
+  }
 
+  private init() {
     this.embark.events.request("processes:register", "api", {
       launchFn: (cb: (error: Error | null, message: string) => void) => {
         this.api.start()
@@ -44,10 +49,20 @@ export default class Api {
       }
       this.setServiceCheck();
     });
+
+    this.embark.events.on("check:wentOffline:api", () => {
+      this.embark.logger.info(__("Cockpit is offline, please close Cockpit."));
+    });
+    this.embark.events.on("check:backOnline:api", () => {
+      this.embark.logger.info(__("Cockpit is online, please open/refresh Cockpit."));
     });
   }
 
   private setServiceCheck() {
+    if (this.isServiceRegistered) {
+      return;
+    }
+    this.isServiceRegistered = true;
     this.embark.events.request("services:register", "api", (cb: (options: object) => any) => {
       checkIsAvailable(this.apiUrl, (isAvailable: boolean) => {
         const devServer = __("Cockpit UI") + " (" + this.apiUrl + ")";
@@ -55,16 +70,18 @@ export default class Api {
         return cb({ name: devServer, status: serverStatus });
       });
     });
-
-    this.embark.events.on("check:wentOffline:api", () => {
-      this.embark.logger.info(__("Cockpit UI is offline"));
-    });
   }
 
   private listenToCommands() {
     this.embark.events.setCommandHandler("api:url", (cb) => cb(this.apiUrl));
-    this.embark.events.setCommandHandler("api:start", (cb) => this.embark.events.request("processes:launch", "api", cb));
+    this.embark.events.setCommandHandler("api:start", (cb) => {
-    this.embark.events.setCommandHandler("api:stop",  (cb) => this.embark.events.request("processes:stop", "api", cb));
+      this.embark.logger.warn(__("The event 'api:start' has been deprecated and will be removed in future versions."));
+      this.embark.events.request("processes:launch", "api", cb);
+    });
+    this.embark.events.setCommandHandler("api:stop", (cb) => {
+      this.embark.logger.warn(__("The event 'api:stop' has been deprecated and will be removed in future versions."));
+      this.embark.events.request("processes:stop", "api", cb);
+    });
     this.embark.events.setCommandHandler("logs:api:enable", (cb) => {
       this.api.enableLogging();
       cb();
@@ -79,16 +96,24 @@ export default class Api {
     this.embark.registerConsoleCommand({
       description: __("Start or stop the API"),
       matches: ["api start"],
-      process: (cmd: string, callback: () => void) => {
+      process: (cmd: string, callback: (msg: string) => void) => {
-        this.embark.events.request("api:start", callback);
+        const message = __("The command 'api:start' has been deprecated in favor of 'service api on' and will be removed in future versions.");
+        this.embark.logger.warn(message); // logs to Embark's console
+        this.embark.events.request("processes:launch", "api", (err: string, msg: string) => {
+          callback(err || msg); // logs to Cockpit's console
+        });
       },
       usage: "api start/stop",
     });
 
     this.embark.registerConsoleCommand({
       matches: ["api stop"],
-      process: (cmd: string, callback: () => void) => {
+      process: (cmd: string, callback: (msg: string) => void) => {
-        this.embark.events.request("api:stop", callback);
+        const message = __("The command 'api:stop' has been deprecated in favor of 'service api off' and will be removed in future versions.");
+        this.embark.logger.warn(message); // logs to Embark's console
+        this.embark.events.request("processes:stop", "api", (err: string, msg: string) => {
+          callback(err || msg); // logs to Cockpit's console
+        });
       },
     });
 

packages/embark-api/src/server.ts

@@ -9,6 +9,7 @@ import expressWs from "express-ws";
 import findUp from "find-up";
 import helmet from "helmet";
 import * as http from "http";
+import * as net from "net";
 import * as path from "path";
 import * as ws from "ws";
 
@@ -28,6 +29,8 @@ export default class Server {
   private isLogging: boolean = false;
   private server?: http.Server;
 
+  private openSockets = new Set<net.Socket>();
+
   constructor(private embark: Embark, private port: number, private hostname: string, private plugins: Plugins) {
     this.expressInstance = this.initApp();
     this.embarkUiBuildDir = (findUp.sync("node_modules/embark-ui/build", {cwd: embarkPath()}) || embarkPath("node_modules/embark-ui/build"));
@@ -67,6 +70,15 @@ export default class Server {
       this.server = this.expressInstance.app.listen(this.port, this.hostname, () => {
         resolve();
       });
+
+      // keep track of our open websockets so we can destroy them
+      // if the api server is shutdown
+      this.server.on("connection", (socket) => {
+        this.openSockets.add(socket);
+        socket.on("close", () => {
+          this.openSockets.delete(socket);
+        });
+      });
     });
   }
 
@@ -77,6 +89,9 @@ export default class Server {
         return reject(new Error(message));
       }
 
+      // close any open sockets
+      this.openSockets.forEach((socket) => socket.destroy());
+
       this.server.close(() => {
         this.server = undefined;
         resolve();

packages/embark-typings/src/logger.d.ts

@@ -1,4 +1,5 @@
 export interface Logger {
   info(text: string): void;
+  warn(text: string): void;
   error(text: string, ...args: Array<string|Error>): void;
 }

packages/embark-ui/src/containers/ContractsContainer.js

@@ -8,6 +8,8 @@ import Contracts from '../components/Contracts';
 import ContractsList from '../components/ContractsList';
 import {getContracts} from "../reducers/selectors";
 import PageHead from "../components/PageHead";
+import Loading from '../components/Loading';
+import Error from '../components/Error';
 
 const MAX_CONTRACTS = 10;
 
@@ -78,16 +80,25 @@ class ContractsContainer extends Component {
   }
 
   render() {
+    const {error, loading, mode, updatePageHeader} = this.props;
+    if (error) {
+      return <Error error={error} />;
+    }
+
+    if (loading) {
+      return <Loading />;
+    }
+
     this.resetNums();
     let ContractsComp;
-    if (this.props.mode === "detail") {
+    if (mode === "detail") {
       ContractsComp = Contracts
-    } else if (this.props.mode === "list") {
+    } else if (mode === "list") {
       ContractsComp = ContractsList
     }
     return (
       <React.Fragment>
-        {this.props.updatePageHeader &&
+        {updatePageHeader &&
           <PageHead title="Contracts"
             description="Summary of all deployed contracts" />}
         <ContractsComp contracts={this.currentContracts}
@@ -115,7 +126,9 @@ ContractsContainer.propTypes = {
   stopContracts: PropTypes.func,
   fiddleContracts: PropTypes.array,
   mode: PropTypes.string,
-  updatePageHeader: PropTypes.bool
+  updatePageHeader: PropTypes.bool,
+  error: PropTypes.string,
+  loading: PropTypes.bool
 };
 
 ContractsContainer.defaultProps = {

packages/embark-ui/src/containers/HomeContainer.js

@@ -9,7 +9,6 @@ import {
 } from 'reactstrap';
 
 import {
-  contracts as contractsAction,
   commands as commandsAction,
   commandSuggestions as commandSuggestionsAction,
   listenToProcessLogs,
@@ -22,7 +21,7 @@ import Console from '../components/Console';
 import {EMBARK_PROCESS_NAME, LOG_LIMIT} from '../constants';
 import PageHead from '../components/PageHead';
 import ServicesContainer from './ServicesContainer';
-import {getContracts, getProcesses, getProcessLogs, getServices, getCommandSuggestions} from "../reducers/selectors";
+import {getProcesses, getProcessLogs, getServices, getCommandSuggestions} from "../reducers/selectors";
 import ContractsContainer from "./ContractsContainer";
 
 class HomeContainer extends Component {
@@ -45,7 +44,6 @@ class HomeContainer extends Component {
     this.props.fetchProcessLogs(processName, LOG_LIMIT);
     this.props.listenToProcessLogs(processName);
 
-    this.props.fetchContracts();
     this.setState({activeProcess: processName});
   }
 
@@ -71,17 +69,14 @@ class HomeContainer extends Component {
           </Card>
         )} />
 
-        <DataWrapper shouldRender={this.props.contracts.length > 0} {...this.props} render={({contracts}) => (
         <Card>
           <CardBody>
             <CardTitle>Deployed Contracts</CardTitle>
             <div style={{marginBottom: '1.5rem', overflow: 'auto'}}>
-                <ContractsContainer contracts={contracts} mode="list" numContractsToDisplay={5} updatePageHeader={false} />
+              <ContractsContainer mode="list" numContractsToDisplay={5} updatePageHeader={false} />
             </div>
           </CardBody>
         </Card>
-        )} />
-
 
       </React.Fragment>
     );
@@ -97,16 +92,13 @@ HomeContainer.propTypes = {
   stopProcessLogs: PropTypes.func,
   fetchProcessLogs: PropTypes.func,
   listenToProcessLogs: PropTypes.func,
-  fetchContracts: PropTypes.func,
+  services: PropTypes.array
-  services: PropTypes.array,
-  contracts: PropTypes.array
 };
 
 function mapStateToProps(state) {
   return {
     processes: getProcesses(state),
     services: getServices(state),
-    contracts: getContracts(state),
     error: state.errorMessage,
     processLogs: getProcessLogs(state),
     commandSuggestions: getCommandSuggestions(state),
@@ -120,7 +112,6 @@ export default connect(
     postCommand: commandsAction.post,
     postCommandSuggestions: commandSuggestionsAction.post,
     fetchProcessLogs: processLogsAction.request,
-    fetchContracts: contractsAction.request,
     listenToProcessLogs,
     stopProcessLogs
   }

packages/embark-ui/src/containers/ServicesContainer.js

@@ -31,11 +31,15 @@ class ServicesContainer extends Component {
 ServicesContainer.propTypes = {
   fetchServices: PropTypes.func,
   listenToServices: PropTypes.func,
+  error: PropTypes.string,
+  loading: PropTypes.bool
 };
 
 function mapStateToProps(state, _props) {
   return {
-    services: getServices(state)
+    services: getServices(state),
+    error: state.errorMessage,
+    loading: state.loading
   };
 }