| Interface | Description | 
|---|---|
| FenceMethod | 
 A fencing method is a method by which one node can forcibly prevent
 another node from making continued progress. 
 | 
| HAServiceProtocol | 
 Protocol interface that provides High Availability related primitives to
 monitor and fail-over the service. 
 | 
| Class | Description | 
|---|---|
| HAServiceProtocolHelper | 
 Helper for making  
HAServiceProtocol RPC calls. | 
| HAServiceTarget | 
 Represents a target of the client side HA administration commands. 
 | 
| Exception | Description | 
|---|---|
| BadFencingConfigurationException | 
 Indicates that the operator has specified an invalid configuration
 for fencing methods. 
 | 
| FailoverFailedException | 
 Exception thrown to indicate service failover has failed. 
 | 
| HealthCheckFailedException | 
 Exception thrown to indicate that health check of a service failed. 
 | 
| ServiceFailedException | 
 Exception thrown to indicate that an operation performed
 to modify the state of a service or application failed. 
 | 
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