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# Grid code samples (Java SDK)

The following code samples show how to lock a grid node that provides the capabilities required for your test, and then perform operations on that node.

In this topic:

## Lock a node as part of the launch browser step

Call BrowserFactory.launch with a browser description that includes environment capabilities. This call locks a node with the described environment, launches the browser on the node, and returns a browser handle.

    @Test
    public void grid_LaunchBrowser_BrowserDescWithEnvDesc () throws GeneralLeanFtException {

        final String      nodeOsType = "Windows";		// set this to the node OS type
        final String      nodeOsVersion = "7";		        // set this to the node OS version
        final BrowserType browserType = BrowserType.CHROME;	// set this to the requested browser type
        final String      browserVersion = ">57";		// set this to the requested browser version

        // create a browser description object that includes also the required environment
        BrowserDescription browserDesc = new BrowserDescription.Builder().build();
        browserDesc.set("type", browserType);
        browserDesc.set("version", browserVersion);
        browserDesc.set("ostype", nodeOsType);
        browserDesc.set("osversion", nodeOsVersion);

        // launch the browser (the required DesktopEnvironment is locked for you behind the scenes)
        Browser browser = BrowserFactory.launch(browserDesc);

        // your test code goes here

        browser.close();
    }

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## Lock a node and then launch a browser on that node

Call EnvironmentFactory.get with an environment description. This calls locks a node with the described environment and returns an environment handle.

Call BrowserFactory.launch with a browser description and the environment handle to launch the browser on the locked node.

    @Test
    public void grid_LaunchBrowser_OnSpecifiedEnv() throws GeneralLeanFtException {

        final String      nodeOsType = "Windows";		// set this to the node OS type
        final String      nodeOsVersion = "7";		        // set this to the node OS version
        final BrowserType browserType = BrowserType.CHROME;	// set this to the requested browser type
        final String      browserVersion = ">57";              // set this to the requested browser version

        // create an environment description object that includes required environment capabilities
        EnvironmentDescription envDesc = new EnvironmentDescription.Builder().build();
        envDesc.set("ostype", nodeOsType);
        envDesc.set("osversion", nodeOsVersion);

        // lock a matching desktop environment
        DesktopEnvironment env = EnvironmentFactory.get(envDesc);

        // create a browser description object that includes only browser description
        BrowserDescription browserDesc = new BrowserDescription.Builder().build();
        browserDesc.set("type", browserType);
        browserDesc.set("version", browserName);

        // launch the browser on the locked desktop environment
        Browser browser = BrowserFactory.launch(browserDesc, env);

        // your test code goes here

        browser.close();
    }

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## Lock a node and perform operations on a desktop application

Call EnvironmentFactory.get with an environment description. This calls locks a node with the described environment and returns an environment handle (env).

Call env.describe to specify the calculator application on the node, and then press its buttons.

    @Test
    public void grid_Describe_ClickOnDescribedObject() throws GeneralLeanFtException {

        final String nodeOsType = "Windows";		// set this to the node OS type
        final String nodeOsVersion = "7";		// set this to the node OS version

        // create capabilities map, convert it to environment description and lock a matching desktop environment
        Map<String,Object> capabilities = new HashMap<>();
        capabilities.put("osType", nodeOsType);
        capabilities.put("osversion ", nodeOsVersion);
        DesktopEnvironment env = EnvironmentFactory.get(EnvironmentDescription.fromMap(capabilities));

        // describe a window hierarchy under the desktop environment
        Window calculator = env.describe(Window.class, new WindowDescription.Builder()
            .childWindow(false)
            .ownedWindow(false)
            .windowClassRegExp("CalcFrame")
            .windowTitleRegExp("Calculator").build());

         // your test code goes here.

         // e.g. this is how you click on a button in the desktop application:
         Button btn = calculator.describe(Button.class, new ButtonDescription.Builder()
             .nativeClass("Button")
             .text("")
             .windowId(135).build());
         // click
         btn.click();
    }

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## Lock a node and perform operations using the node's mouse

Call EnvironmentFactory.get with an environment description. This calls locks a node with the described environment and returns an environment handle (env).

Call env.getMouse to gain access to the node's mouse and use it for operations.

    @Test
    public void grid_DeviceReplay_Mouse () throws GeneralLeanFtException {

        final String nodeOsType = "Windows";		// set this to the node OS type
        final String nodeOsVersion = "7";		// set this to the node OS version

        // create capabilities map, convert it to environment description and lock a matching desktop environment
        Map<String,Object> capabilities = new HashMap<>();
        capabilities.put("osType", nodeOsType);
        capabilities.put("osversion ", nodeOsVersion);
        DesktopEnvironment env = EnvironmentFactory.get(EnvironmentDescription.fromMap(capabilities));

        // get Mouse to perform low-level mouse actions
        MouseDevice mouse = env.getMouse();

        // your test code goes here.

        // e.g. this is how you right-click on point:
        mouse.click(new Point(80,80), MouseButton.RIGHT);
    }

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