IServiceListener (Eclipse Communication Framework (ECF) 3.14.41 API)

```
public interface IServiceListener
```
Listener for receiving service events
Note these methods will be called asynchronously when notifications of remote changes are received by the provider implementation code. The provider is free to call the methods below with an arbitrary thread, so the implementation of these methods must be appropriately prepared.
For example, if the code implementing any of these methods must interact with user interface code, then it should use code such as the following to execute on the SWT UI thread:
```
        Display.getDefault().asyncExec(new Runnable() {
                public void run() {
                ... UI code here
                }
        });
 
```
Further, the code in the implementations of these methods should not block via I/O operations or blocking UI calls.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`serviceDiscovered(IServiceEvent anEvent)`	Notification that a service has been discovered (the service is fully resolved).
`void`	`serviceUndiscovered(IServiceEvent anEvent)`	Notification that a previously discovered service has been undiscovered.
`boolean`	`triggerDiscovery()`

- Method Detail
  - triggerDiscovery
```
boolean triggerDiscovery()
```
    Returns:
    
    true iff this IServiceListener request re-discovery by the IDiscoveryLocator. The discovery IServiceEvent will be fired asynchronously.
    
    Since:
    
    5.0
  - serviceDiscovered
```
void serviceDiscovered(IServiceEvent anEvent)
```
    Notification that a service has been discovered (the service is fully resolved).
    
    Parameters:
    
    anEvent - Will not be null
  - serviceUndiscovered
```
void serviceUndiscovered(IServiceEvent anEvent)
```
    Notification that a previously discovered service has been undiscovered.
    
    Parameters:
    
    anEvent - Will not be null