com.vaadin.server.communication.UidlWriter API 8.27.7 | Vaadin

com.vaadin.server.communication.

java.lang.Object
- com.vaadin.server.communication.UidlWriter

All Implemented Interfaces:

Serializable
```
public class UidlWriter
extends Object
implements Serializable
```
Serializes pending server-side changes to UI state to JSON. This includes shared state, client RPC invocations, connector hierarchy changes, connector type information among others.

Since:

7.1

Author:

Vaadin Ltd

See Also:

Serialized Form

- Constructor Summary
  
  Constructors
  Constructor Description
  
  UidlWriter()
- Method Summary
  
  All Methods
  Modifier and Type Method Description
  
  void write(UI ui, Writer writer, boolean async)
  Writes a JSON object containing all pending changes to the given UI.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - UidlWriter
```
public UidlWriter()
```
- Method Detail
  - write
```
public void write(UI ui,
                  Writer writer,
                  boolean async)
           throws IOException
```
    Writes a JSON object containing all pending changes to the given UI.
    
    Parameters:
    
    ui - The UI whose changes to write
    
    writer - The writer to use
    
    async - True if this message is sent by the server asynchronously, false if it is a response to a client message.
    
    Throws:
    
    IOException - If the writing fails.