Class PwaHandler
- java.lang.Object
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- com.vaadin.flow.server.communication.PwaHandler
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- All Implemented Interfaces:
RequestHandler
,Serializable
public class PwaHandler extends Object implements RequestHandler
Handles serving of PWA resources. Resources include:- manifest
- offline fallback page
- icons
For internal use only. May be renamed or removed in a future release.
- Since:
- 1.2
- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description static String
DEFAULT_OFFLINE_STUB_PATH
static String
SW_RUNTIME_PRECACHE_PATH
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Constructor Summary
Constructors Constructor Description PwaHandler(SerializableSupplier<PwaRegistry> pwaRegistryGetter)
Creates PwaHandler fromPwaRegistry
getter.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
handleRequest(VaadinSession session, VaadinRequest request, VaadinResponse response)
Called when a request needs to be handled.
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Field Detail
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SW_RUNTIME_PRECACHE_PATH
public static final String SW_RUNTIME_PRECACHE_PATH
- See Also:
- Constant Field Values
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DEFAULT_OFFLINE_STUB_PATH
public static final String DEFAULT_OFFLINE_STUB_PATH
- See Also:
- Constant Field Values
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Constructor Detail
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PwaHandler
public PwaHandler(SerializableSupplier<PwaRegistry> pwaRegistryGetter)
Creates PwaHandler fromPwaRegistry
getter.- Parameters:
pwaRegistryGetter
- PWA registry getter
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Method Detail
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handleRequest
public boolean handleRequest(VaadinSession session, VaadinRequest request, VaadinResponse response) throws IOException
Description copied from interface:RequestHandler
Called when a request needs to be handled. If a response is written, this method should returntrue
to indicate that no more request handlers should be invoked for the request.Note that request handlers by default do not lock the session. If you are using VaadinSession or anything inside the VaadinSession you must ensure the session is locked. This can be done by extending
SynchronizedRequestHandler
or by usingVaadinSession.accessSynchronously(Command)
orUI.accessSynchronously(Command)
.- Specified by:
handleRequest
in interfaceRequestHandler
- Parameters:
session
- The session for the requestrequest
- The request to handleresponse
- The response object to which a response can be written.- Returns:
- true if a response has been written and no further request handlers should be called, otherwise false
- Throws:
IOException
- If an IO error occurred
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