Package com.vaadin.flow.server

Class VaadinServletService

java.lang.Object

com.vaadin.flow.server.VaadinService

com.vaadin.flow.server.VaadinServletService

All Implemented Interfaces:

Serializable

public class VaadinServletService
extends VaadinService

A service implementation connected to a VaadinServlet.

Since:

1.0

Author:

Vaadin Ltd

See Also:

Serialized Form

Field Summary

Fields inherited from class com.vaadin.flow.server.VaadinService

ATMOSPHERE_MISSING_ERROR, CANNOT_ACQUIRE_CLASSLOADER_SEVERE, INVALID_ATMOSPHERE_VERSION_WARNING

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	VaadinServletService()	Creates a servlet service.
	VaadinServletService(VaadinServlet servlet, DeploymentConfiguration deploymentConfiguration)	Creates an instance connected to the given servlet and using the given configuration.

Method Summary

Modifier and Type	Method	Description
protected VaadinContext	constructVaadinContext()	Constructs VaadinContext for this service.
protected List<RequestHandler>	createRequestHandlers()	Called during initialization to add the request handlers for the service.
String	getContextRootRelativePath(VaadinRequest request)	Returns relative context path for given request.
static VaadinServletResponse	getCurrentResponse()
static javax.servlet.http.HttpServletRequest	getCurrentServletRequest()
String	getMainDivId(VaadinSession session, VaadinRequest request)	Creates and returns a unique ID for the DIV where the UI is to be rendered.
String	getMimeType(String resourceName)	Returns the MIME type of the specified file, or null if the MIME type is not known.
protected PwaRegistry	getPwaRegistry()
URL	getResource(String path)	Returns a URL to the resource at the given Vaadin URI.
InputStream	getResourceAsStream(String path)	Opens a stream to to the resource at the given Vaadin URI.
URL	getResourceInServletContext(String path)	Finds the given resource in the servlet context.
protected RouteRegistry	getRouteRegistry()	Find a route registry to use for this service.
String	getServiceName()	Gets a unique name for this service.
VaadinServlet	getServlet()	Retrieves a reference to the servlet associated with this service.
URL	getStaticResource(String path)	Returns a URL to the static resource at the given URI or null if no file found.
void	init()	Initializes this service.
protected boolean	requestCanCreateSession(VaadinRequest request)	Checks whether it's valid to create a new service session as a result of the given request.
String	resolveResource(String url)	Resolves the given url resource to be useful for VaadinService.getResource(String) and VaadinService.getResourceAsStream(String ).
protected void	setDefaultClassLoader()	Tries to acquire default class loader and sets it as a class loader for this VaadinService if found.

Methods inherited from class com.vaadin.flow.server.VaadinService

accessSession, addServiceDestroyListener, addSessionDestroyListener, addSessionInitListener, addUIInitListener, closeSession, createCriticalNotificationJSON, createCriticalNotificationJSON, createInstantiator, createSessionExpiredJSON, createUINotFoundJSON, createVaadinSession, destroy, ensureAccessQueuePurged, ensurePushAvailable, findUI, findVaadinSession, fireSessionDestroy, fireUIInitListeners, getBootstrapInitialPredicate, getBootstrapUrlPredicate, getClassLoader, getContext, getCsrfTokenAttributeName, getCurrent, getCurrentRequest, getDependencyFilters, getDeploymentConfiguration, getExistingSession, getInstantiator, getRequestHandlers, getRouter, getSessionAttributeName, getSessionLock, getSystemMessages, getSystemMessagesProvider, handleRequest, handleSessionExpired, isAtmosphereAvailable, isCsrfTokenValid, isOtherSessionLocked, isResourceAvailable, isUIActive, loadInstantiators, loadSession, lockSession, modifyBootstrapPage, modifyIndexHtmlResponse, readFromHttpSession, reinitializeSession, removeFromHttpSession, removeSession, requestEnd, requestStart, runPendingAccessTasks, setBootstrapInitialPredicate, setBootstrapUrlPredicate, setClassLoader, setCurrent, setCurrentInstances, setSystemMessagesProvider, storeSession, unlockSession, verifyNoOtherSessionLocked, writeStringResponse, writeToHttpSession, writeUncachedStringResponse

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

VaadinServletService

public VaadinServletService(VaadinServlet servlet,
                            DeploymentConfiguration deploymentConfiguration)

Creates an instance connected to the given servlet and using the given configuration.

Parameters:

servlet - the servlet which receives requests

deploymentConfiguration - the configuration to use

VaadinServletService

protected VaadinServletService()

Creates a servlet service. This method is for use by dependency injection frameworks etc. getServlet() and VaadinService.getContext() should be overridden (or otherwise intercepted) to not return null.

Method Detail

createRequestHandlers

protected List<RequestHandler> createRequestHandlers()
                                              throws ServiceException

Description copied from class: VaadinService

Called during initialization to add the request handlers for the service. Note that the returned list will be reversed so the last handler will be called first. This enables overriding this method and using add on the returned list to add a custom request handler which overrides any predefined handler.

Overrides:

createRequestHandlers in class VaadinService

Returns:

The list of request handlers used by this service.

Throws:

ServiceException - if a problem occurs when creating the request handlers

getServlet

public VaadinServlet getServlet()

Retrieves a reference to the servlet associated with this service. Should be overridden (or otherwise intercepted) if the no-arg constructor is used to prevent NPEs.

Returns:

A reference to the VaadinServlet this service is using

getMimeType

public String getMimeType(String resourceName)

Description copied from class: VaadinService

Returns the MIME type of the specified file, or null if the MIME type is not known. The MIME type is determined by the configuration of the container, and may be specified in a deployment descriptor. Common MIME types are "text/html" and "image/gif".

Specified by:

getMimeType in class VaadinService

Parameters:

resourceName - a String specifying the name of a file

Returns:

a String specifying the file's MIME type

See Also:

ServletContext.getMimeType(String)

requestCanCreateSession

protected boolean requestCanCreateSession(VaadinRequest request)

Description copied from class: VaadinService

Checks whether it's valid to create a new service session as a result of the given request.

Specified by:

requestCanCreateSession in class VaadinService

Parameters:

request - the request

Returns:

true if it's valid to create a new service session for the request; else false

init

public void init()
          throws ServiceException

Description copied from class: VaadinService

Initializes this service. The service should be initialized before it is used.

Overrides:

init in class VaadinService

Throws:

ServiceException - if a problem occurs when creating the service

getCurrentServletRequest

public static javax.servlet.http.HttpServletRequest getCurrentServletRequest()

getCurrentResponse

public static VaadinServletResponse getCurrentResponse()

getServiceName

public String getServiceName()

Description copied from class: VaadinService

Gets a unique name for this service. The name should be unique among different services of the same type but the same for corresponding instances running in different JVMs in a cluster. This is typically based on e.g. the configured servlet's name.

Specified by:

getServiceName in class VaadinService

Returns:

the unique name of this service instance.

getMainDivId

public String getMainDivId(VaadinSession session,
                           VaadinRequest request)

Description copied from class: VaadinService

Creates and returns a unique ID for the DIV where the UI is to be rendered.

Specified by:

getMainDivId in class VaadinService

Parameters:

session - The service session to which the bootstrapped UI will belong.

request - The request for which a div id is needed

Returns:

the id to use in the DOM

getRouteRegistry

protected RouteRegistry getRouteRegistry()

Description copied from class: VaadinService

Find a route registry to use for this service.

Specified by:

getRouteRegistry in class VaadinService

Returns:

the route registry to use, not null

getPwaRegistry

protected PwaRegistry getPwaRegistry()

Specified by:

getPwaRegistry in class VaadinService

resolveResource

public String resolveResource(String url)

Description copied from class: VaadinService

Resolves the given url resource to be useful for VaadinService.getResource(String) and VaadinService.getResourceAsStream(String ).

Specified by:

resolveResource in class VaadinService

Parameters:

url - the resource to resolve, not null

Returns:

the resolved URL or the same as the input url if no translation was performed

getStaticResource

public URL getStaticResource(String path)

Description copied from class: VaadinService

Returns a URL to the static resource at the given URI or null if no file found.

Specified by:

getStaticResource in class VaadinService

Parameters:

path - the URL for the resource

Returns:

the resource located at the named path, or null if there is no resource at that path

getResource

public URL getResource(String path)

Description copied from class: VaadinService

Returns a URL to the resource at the given Vaadin URI.

Specified by:

getResource in class VaadinService

Parameters:

path - the untranslated Vaadin URL for the resource

Returns:

the resource located at the named path, or null if there is no resource at that path

getResourceAsStream

public InputStream getResourceAsStream(String path)

Description copied from class: VaadinService

Opens a stream to to the resource at the given Vaadin URI.

Specified by:

getResourceAsStream in class VaadinService

Parameters:

path - the untranslated Vaadin URL for the resource

Returns:

a stream for the resource or null if no resource exists at the specified path

getResourceInServletContext

public URL getResourceInServletContext(String path)

Finds the given resource in the servlet context.

Parameters:

path - the path inside servlet context

Returns:

a URL for the resource or null if no resource was found

getContextRootRelativePath

public String getContextRootRelativePath(VaadinRequest request)

Description copied from class: VaadinService

Returns relative context path for given request. Override this method in subclasses.

Specified by:

getContextRootRelativePath in class VaadinService

Parameters:

request - Request.

Returns:

Relative context root path for that request.

constructVaadinContext

protected VaadinContext constructVaadinContext()

Description copied from class: VaadinService

Constructs VaadinContext for this service. This method will be called only once, upon first call to VaadinService.getContext().

Specified by:

constructVaadinContext in class VaadinService

Returns:

Context. This may never be null.

setDefaultClassLoader

protected void setDefaultClassLoader()

Description copied from class: VaadinService

Tries to acquire default class loader and sets it as a class loader for this VaadinService if found. If current security policy disallows acquiring class loader instance it will log a message and re-throw SecurityException

Overrides:

setDefaultClassLoader in class VaadinService