Engine (JxBrowser 7.41.2 API)

All Superinterfaces:

java.lang.AutoCloseable, Closeable, Observable<EngineEvent>
```
public interface Engine
extends Closeable, Observable<EngineEvent>
```
Provides access to the Chromium engine functionality.
To perform operations with the engine, a license key is required. The license key represents a string that can be set via the "jxbrowser.license.key" system property or individually for every Engine using the EngineOptions.Builder.licenseKey(String) method. If you set the license key via the system property, then please make sure that you set it before creating an Engine instance.
The Chromium engine is running in a separate native process. Communication between the native and Java process is done through the Inter-Process Communication (IPC) layer that allows transferring data between two processes on a local machine.
The native process allocates memory and system resources that must be released. So, when the engine is no longer needed, it must be closed through the Closeable.close() method to shutdown the native process and free all the allocated memory and system resources. For example:
```
 Engine engine = Engine.newInstance(engineOptions);
 ...
 engine.close();
```
Any attempt to use an already closed engine will lead to the IllegalStateException.
To get notifications that the Engine instance has been closed subscribe to the following event:
```
 engine.on(EngineClosed.class, event -> {
     // The engine has been closed.
 });
 
```
To get notifications that the Engine instance has been unexpectedly terminated use:
```
 engine.on(EngineCrashed.class, event -> {
     // The engine has been unexpectedly terminated.
 });
 
```

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method and Description
`java.util.List<Browser>`	`browsers()` Returns an immutable list of alive `Browser` instances including child popup browsers for the default profile.
`CookieStore`	`cookieStore()` Returns the cookie store that allows managing cookies.
`Downloads`	`downloads()` Returns a service that allows managing downloads.
`HttpAuthCache`	`httpAuthCache()` Returns a service for working with HTTP authentication cache.
`HttpCache`	`httpCache()` Returns a service for working with HTTP cache.
`MediaDevices`	`mediaDevices()` Returns a service that allows managing media stream devices.
`Network`	`network()` Returns a service that allows working with network.
`Browser`	`newBrowser()` Creates a new `Browser` instance under the default profile and navigates it to the "about:blank" web page within the `Navigation.defaultTimeout()`.
`static Engine`	`newInstance(EngineOptions options)` Initializes and runs the Chromium engine with the given `options`.
`static Engine`	`newInstance(RenderingMode renderingMode)` Initializes and runs the Chromium engine in the given `renderingMode`.
`EngineOptions`	`options()` Returns the options the current engine was initialized with.
`Permissions`	`permissions()` Returns a service that allows managing permissions.
`Plugins`	`plugins()` Returns a service that allows configuring plugins.
`Profiles`	`profiles()` Returns a service for managing profiles.
`Proxy`	`proxy()` Returns a service that allows working with proxy.
`void`	`setTheme(Theme theme)` Updates the Chromium theme.
`SpellChecker`	`spellChecker()` Returns a service that allows working with spell checking functionality.
`Theme`	`theme()` Returns the current Chromium theme.
`ZoomLevels`	`zoomLevels()` Returns a service that allows working with zoom.

Methods inherited from interface com.teamdev.jxbrowser.Closeable
close, isClosed

Methods inherited from interface com.teamdev.jxbrowser.event.Observable
on

- Method Detail
  - newInstance
```
static Engine newInstance(RenderingMode renderingMode)
```
    Initializes and runs the Chromium engine in the given renderingMode.
    Depending on the hardware performance, the initialization process might take several seconds. So, do not call this method in the application UI thread.
    The method performs the following actions:
    1. Checks the environment and makes sure that it is supported.
    2. Locates the Chromium binaries and extracts them if it is necessary.
    3. Runs the main native process and initializes the Chromium engine.
    4. Setup IPC connection between Java and the main native process.
    Parameters:
    
    renderingMode - the rendering mode indicating how the content of the web pages will be rendered
    
    Returns:
    
    a new instance of the Engine
    
    Throws:
    
    EnvironmentException - when the current environment is not supported
    
    UserDataDirectoryCreationException - when the given user data directory does not exist and cannot be created
    
    UserDataDirectoryAlreadyInUseException - when the given user data directory is already in use.
    
    IpcSetupFailureException - when Inter-Process Communication (IPC) setup has been failed
    
    ChromiumProcessStartupFailureException - when startup of the Chromium process has been failed
    
    NoLicenseException - when no license found
    
    InvalidLicenseException - when no valid license found
    
    ChromiumBinariesDeliveryException - when the verification of the Chromium binary files has failed and the binaries cannot be extracted from the resources
    
    MissingDependencyException - when Chromium fails to find the required system libraries. This exception can only be thrown on Linux
  - newInstance
```
static Engine newInstance(EngineOptions options)
```
    Initializes and runs the Chromium engine with the given options.
    Depending on the hardware performance, the initialization process might take several seconds. So, do not call this method in the application UI thread.
    The method performs the following actions:
    1. Checks the environment and makes sure that it is supported.
    2. Locates the Chromium binaries and extracts them if it is necessary.
    3. Runs the main native process and initializes the Chromium engine.
    4. Setup IPC connection between Java and the main native process.
    Parameters:
    
    options - the engine options
    
    Returns:
    
    a new instance of the Engine
    
    Throws:
    
    EnvironmentException - when the current environment is not supported
    
    UserDataDirectoryCreationException - when the given user data directory does not exist and cannot be created
    
    UserDataDirectoryAlreadyInUseException - when the given user data directory is already in use.
    
    IpcSetupFailureException - when Inter-Process Communication (IPC) setup has been failed
    
    ChromiumProcessStartupFailureException - when startup of the Chromium process has been failed
    
    NoLicenseException - when no license found
    
    InvalidLicenseException - when no valid license found
    
    ChromiumBinariesDeliveryException - when the verification of the Chromium binary files has failed and the binaries cannot be extracted from the resources
    
    MissingDependencyException - when Chromium fails to find the required system libraries. This exception can only be thrown on Linux
  - options
```
EngineOptions options()
```
    Returns the options the current engine was initialized with.
  - newBrowser
```
Browser newBrowser()
```
    Creates a new Browser instance under the default profile and navigates it to the "about:blank" web page within the Navigation.defaultTimeout().
    
    Returns:
    
    a new Browser instance
    
    Throws:
    
    TimeoutException - when the engine failed to create a browser instance within the timeout
    
    NavigationException - when the navigation to the "about:blank" has failed
    
    ObjectClosedException - when the engine is already closed
  - browsers
```
java.util.List<Browser> browsers()
```
    Returns an immutable list of alive Browser instances including child popup browsers for the default profile.
    Returns an empty list if the profile does not have any alive Browser.
    
    Returns:
    
    the list of alive Browser instances for the default profile of this engine
  - zoomLevels
```
ZoomLevels zoomLevels()
```
    Returns a service that allows working with zoom.
    
    Implementation Note:
    
    The service belongs to the default profile.
  - proxy
```
Proxy proxy()
```
    Returns a service that allows working with proxy.
    
    Implementation Note:
    
    The service belongs to the default profile.
  - network
```
Network network()
```
    Returns a service that allows working with network.
    
    Implementation Note:
    
    The service belongs to the default profile.
  - spellChecker
```
SpellChecker spellChecker()
```
    Returns a service that allows working with spell checking functionality.
    
    Implementation Note:
    
    The service belongs to the default profile.
  - cookieStore
```
CookieStore cookieStore()
```
    Returns the cookie store that allows managing cookies.
    
    Implementation Note:
    
    The service belongs to the default profile.
  - httpCache
```
HttpCache httpCache()
```
    Returns a service for working with HTTP cache.
    
    Implementation Note:
    
    The service belongs to the default profile.
  - httpAuthCache
```
HttpAuthCache httpAuthCache()
```
    Returns a service for working with HTTP authentication cache.
    
    Implementation Note:
    
    The service belongs to the default profile.
  - mediaDevices
```
MediaDevices mediaDevices()
```
    Returns a service that allows managing media stream devices.
  - plugins
```
Plugins plugins()
```
    Returns a service that allows configuring plugins.
    
    Implementation Note:
    
    The service belongs to the default profile.
  - downloads
```
Downloads downloads()
```
    Returns a service that allows managing downloads.
    
    Implementation Note:
    
    The service belongs to the default profile.
  - permissions
```
Permissions permissions()
```
    Returns a service that allows managing permissions.
    
    Implementation Note:
    
    The service belongs to the default profile.
  - profiles
```
Profiles profiles()
```
    Returns a service for managing profiles.
  - setTheme
```
void setTheme(Theme theme)
```
    Updates the Chromium theme.
    This affects the appearance of web-pages and their contents, as well as Chromium dialogs, such as Print Preview and DevTools.
    
    Parameters:
    
    theme - the new Chromium theme.
    
    Since:
    
    7.41.0
  - theme
```
Theme theme()
```
    Returns the current Chromium theme.
    
    Since:
    
    7.41.0

Interface Engine

Method Summary

Methods inherited from interface com.teamdev.jxbrowser.Closeable

Methods inherited from interface com.teamdev.jxbrowser.event.Observable

Method Detail

newInstance

newInstance

options

newBrowser

browsers

zoomLevels

proxy

network

spellChecker

cookieStore

httpCache

httpAuthCache

mediaDevices

plugins

downloads

permissions

profiles

setTheme

theme