DomainManager (OpenNMS 29.0.10 API)

All Known Implementing Classes:

AbstractDomainManager, ConnectionBasedDomainManager, ZookeeperDomainManager
```
public interface DomainManager
```
A manager that is responsible for registering and deregistering clients for a given domain.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`deregister(String id)`	Deregister with the domain being managed.
`boolean`	`isAnythingRegistered()`	Checks if anything is currently registered with the domain being managed.
`boolean`	`isRegistered(String id)`	Checks if a given Id is registered.
`void`	`register(String id, RoleChangeHandler roleChangeHandler)`	Register with the domain being managed.

- Method Detail
  - register
```
void register(String id,
              RoleChangeHandler roleChangeHandler)
```
    Register with the domain being managed. This is a non-blocking call.
    Ids must be unique to this manager. Attempting to register the same Id twice will result in an exception.
    The methods specified by the RoleChangeHandler passed to this method must not block.
    
    Parameters:
    
    id - the Id to register
    
    roleChangeHandler - the role change handler to register
  - deregister
```
void deregister(String id)
```
    Deregister with the domain being managed. This is a non-blocking call.
    
    Parameters:
    
    id - the Id to register
  - isRegistered
```
boolean isRegistered(String id)
```
    Checks if a given Id is registered.
    
    Parameters:
    
    id - the Id to check
    
    Returns:
    
    true if registered, false otherwise
  - isAnythingRegistered
```
boolean isAnythingRegistered()
```
    Checks if anything is currently registered with the domain being managed.
    
    Returns:
    
    true if one or more registrants are currently registered, false otherwise