All Implemented Interfaces:
```
public interface OpenChannelHandler

                    
```
Open channel event handler.
Listens for all open channel event notifications in a unified manner, including:
- Operations: entering, entered, enter failure, exited, reset, and channel destruction
- Notifications: multi-device login sync, member ban/unban, and member mute/unmute
- Metadata: KV data sync after joining, and incremental KV changes (update/delete)
- Members: member join/leave changes with updated total count
Register via NCEngine.addOpenChannelHandler. All callback methods have default empty implementations; override only the callbacks you need.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description

Field Summary

Fields
Modifier and Type	Field	Description

Constructor Summary

Constructors
Constructor	Description

Enum Constant Summary

Enum Constants
Enum Constant	Description

Method Summary

Modifier and Type	Method	Description
`Unit`	`onEntering(OpenChannelEnteringEvent event)`	Called when the user is joining a channel.
`Unit`	`onEntered(OpenChannelEnteredEvent event)`	Called when the user successfully joins a channel.
`Unit`	`onEnterFailed(OpenChannelEnterFailedEvent event)`	Called when a channel operation fails.
`Unit`	`onExited(OpenChannelExitedEvent event)`	Called when the user leaves a channel.
`Unit`	`onReset(OpenChannelResetEvent event)`	Called when the channel is reset.
`Unit`	`onChannelDestroyed(OpenChannelDestroyedEvent event)`	Called when the channel is destroyed.
`Unit`	`onNotifyMultiLoginSync(OpenChannelNotifyMultiLoginSyncEvent event)`	Called for multi-device login sync events.
`Unit`	`onMemberBanned(OpenChannelMemberBannedEvent event)`	Called when a member is banned or unbanned.
`Unit`	`onMemberMuted(OpenChannelMemberMutedEvent event)`	Called when a member is muted or unmuted.
`Unit`	`onMetadataSynced(OpenChannelMetadataSyncedEvent event)`	Called when KV data sync completes after joining a channel.
`Unit`	`onMetadataChanged(OpenChannelMetadataChangedEvent event)`	Called when KV data is updated or deleted.
`Unit`	`onMemberChanged(OpenChannelMemberChangedEvent event)`	Called when channel members change.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
- Method Detail
  - onEntering
```
 Unit onEntering(OpenChannelEnteringEvent event)
```
    Called when the user is joining a channel.
    
    Parameters:
    
    event - Open channel entering event
  - onEntered
```
 Unit onEntered(OpenChannelEnteredEvent event)
```
    Called when the user successfully joins a channel.
    
    Parameters:
    
    event - Open channel entered event
  - onEnterFailed
```
 Unit onEnterFailed(OpenChannelEnterFailedEvent event)
```
    Called when a channel operation fails.
    
    Parameters:
    
    event - Open channel enter failed event
  - onExited
```
 Unit onExited(OpenChannelExitedEvent event)
```
    Called when the user leaves a channel.
    
    Parameters:
    
    event - Open channel exited event
  - onReset
```
 Unit onReset(OpenChannelResetEvent event)
```
    Called when the channel is reset.
    If the join succeeds but the channel was reset, this callback is received followed by an onEntered callback.
    
    Parameters:
    
    event - Open channel reset event
  - onChannelDestroyed
```
 Unit onChannelDestroyed(OpenChannelDestroyedEvent event)
```
    Called when the channel is destroyed.
    This callback is only received when the user is online at the time of destruction.
    
    Parameters:
    
    event - Open channel destroyed event
  - onNotifyMultiLoginSync
```
 Unit onNotifyMultiLoginSync(OpenChannelNotifyMultiLoginSyncEvent event)
```
    Called for multi-device login sync events.
    Includes notifications for multi-device join/leave and being kicked.
    
    Parameters:
    
    event - Sync event info
  - onMemberBanned
```
 Unit onMemberBanned(OpenChannelMemberBannedEvent event)
```
    Called when a member is banned or unbanned.
    
    Parameters:
    
    event - Member banned event
  - onMemberMuted
```
 Unit onMemberMuted(OpenChannelMemberMutedEvent event)
```
    Called when a member is muted or unmuted.
    
    Parameters:
    
    event - Member muted event
  - onMetadataSynced
```
 Unit onMetadataSynced(OpenChannelMetadataSyncedEvent event)
```
    Called when KV data sync completes after joining a channel.
    
    Parameters:
    
    event - Metadata synced event
  - onMetadataChanged
```
 Unit onMetadataChanged(OpenChannelMetadataChangedEvent event)
```
    Called when KV data is updated or deleted.
    Returns incremental KV changes. The first callback after joining a channel will return the full KV data.
    
    Parameters:
    
    event - Metadata changed event
  - onMemberChanged
```
 Unit onMemberChanged(OpenChannelMemberChangedEvent event)
```
    Called when channel members change.
    
    Parameters:
    
    event - Member changed event containing channel ID, changed members, and total count

Interface OpenChannelHandler

Nested Class Summary

Field Summary

Constructor Summary

Enum Constant Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Method Detail

onEntering

onEntered

onEnterFailed

onExited

onReset

onChannelDestroyed

onNotifyMultiLoginSync

onMemberBanned

onMemberMuted

onMetadataSynced

onMetadataChanged

onMemberChanged