DevModeHandler (Vaadin Platform (vaadin-platform-javadoc) 23.0.0 API)

All Superinterfaces:

RequestHandler, Serializable

All Known Implementing Classes:

AbstractDevServerRunner, ViteHandler, WebpackHandler
```
public interface DevModeHandler
extends RequestHandler
```

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`String`	`getFailedOutput()`	Return the dev server console output when a compilation error happened.
`File`	`getProjectRoot()`	Gets the project root folder.
`HttpURLConnection`	`prepareConnection(String path, String method)`	Prepare a HTTP connection against the dev server.
`boolean`	`serveDevModeRequest(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)`	Serve a file by proxying to the dev server.
`void`	`stop()`	Stop the dev-server.

Methods inherited from interface com.vaadin.flow.server.RequestHandler
handleRequest

- Method Detail
  - getFailedOutput
```
String getFailedOutput()
```
    Return the dev server console output when a compilation error happened.
    
    Returns:
    
    console output if error or null otherwise.
  - prepareConnection
```
HttpURLConnection prepareConnection(String path,
                                    String method)
                             throws IOException
```
    Prepare a HTTP connection against the dev server.
    
    Parameters:
    
    path - the file to request, needs to be safe
    
    method - the http method to use
    
    Returns:
    
    the connection
    
    Throws:
    
    IOException - on connection error
  - serveDevModeRequest
```
boolean serveDevModeRequest(javax.servlet.http.HttpServletRequest request,
                            javax.servlet.http.HttpServletResponse response)
                     throws IOException
```
    Serve a file by proxying to the dev server.
    
    Parameters:
    
    request - the servlet request
    
    response - the servlet response
    
    Returns:
    
    false if the dev server returned a not found, true otherwise
    
    Throws:
    
    IOException - in the case something went wrong like connection refused
  - stop
```
void stop()
```
    Stop the dev-server.
  - getProjectRoot
```
File getProjectRoot()
```
    Gets the project root folder.
    
    Returns:
    
    the project root folder