Caplin Systems - JsonChannel (StreamLink Android 7.1.13-691-3f8d3cb API Documentation)

```
public interface JsonChannel
```
Represents a JSON channel to a subject on the Liberator.

A Channel provides a bi-directional communication channel between a StreamLink application and a DataSource adapter. Using a Channel in both DataSource and StreamLink provides a simplified method of communication between the two components and can allow you just to use the Caplin platform as a bi-directional messaging pipe.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`closeChannel()`	Closes the channel to the Liberator.
`java.lang.String`	`getSubject()`	Returns the subject name to which the channel relates.
`void`	`send(java.lang.Object obj, CommandListener commandListener)`	Sends object as JSON to the channel subject

- Method Detail
  - getSubject
```
java.lang.String getSubject()
```
    Returns the subject name to which the channel relates.
    
    Returns:
    
    The subject of this channel.
  - closeChannel
```
void closeChannel()
```
    Closes the channel to the Liberator. This will result in a corresponding call to onChannelClose declared in ChannelListener on the DataSource. The delay before onChannelClose is called is defined by the Liberator configuration item, active-discard-timeout.
  - send
```
void send(java.lang.Object obj,
          CommandListener commandListener)
```
    Sends object as JSON to the channel subject
    
    Parameters:
    
    obj - the object to send in JSON format (using the installed JsonHandler to serialize the object to JSON)
    
    commandListener - optional callback for command completion (can set to null).