MessageChannel

All Known Implementing Classes:

WebSocketChannel
```
public interface MessageChannel
```
Interface representing the channel used by the backend to send messages down to the client (the websocket).

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`close()`	Close the message channel
`java.lang.String`	`getPageId()`	Returns the view group identifier, which is used to differentiate between different instances of the same project .
`java.lang.String`	`getProject()`	Returns the name of the project, which is unique.
`boolean`	`isClosed()`
`boolean`	`isOpen()`
`void`	`send(java.lang.String protocol, java.lang.String payload)`	Sends a message to be handled by the appropriate handler (as identified by the protocol)

- Method Detail
  - getProject
```
java.lang.String getProject()
```
    Returns the name of the project, which is unique.
  - getPageId
```
java.lang.String getPageId()
```
    Returns the view group identifier, which is used to differentiate between different instances of the same project . For a live project running in a browser, this might be the unique browser tab identifier. For a designer, this may be a specific workspace tab.
  - isOpen
```
boolean isOpen()
```
    Returns:
    
    false if the message channel not connected
  - isClosed
```
boolean isClosed()
```
    Returns:
    
    true iff this channel was closed by the local side of this connection (in order words: from a call to close()
  - send
```
void send(java.lang.String protocol,
          java.lang.String payload)
   throws java.io.IOException
```
    Sends a message to be handled by the appropriate handler (as identified by the protocol)
    
    Throws:
    
    java.io.IOException
  - close
```
void close()
```
    Close the message channel