| Interface | Description | 
|---|---|
| HeartbeatAware | 
QuorumFunctions which implement this interface will be notified of member heartbeats. | 
| PingAware | 
 Quorum functions that need access to ICMP ping failure detector should implement this interface; the instance of
  
PingFailureDetector used by this member's ClusterHeartbeatManager
 will be provided on initialization. | 
| Quorum | 
Quorum provides access to the current status of a quorum. | 
| QuorumFunction | 
 A function that can be used to conclude absence/presence of quorum. 
 | 
| QuorumListener | 
 Listener to get notified when a quorum state is changed
 IMPORTANT: The term "quorum" simply refers to the count of members in the cluster required for an operation to succeed. 
 | 
| QuorumService | 
 Quorum service can be used to trigger cluster quorums at any time. 
 | 
| Class | Description | 
|---|---|
| QuorumEvent | 
 An Event that is send when a  
Quorum changes. | 
| Enum | Description | 
|---|---|
| QuorumType | 
 Represents a cluster quorum type 
 | 
| Exception | Description | 
|---|---|
| QuorumException | 
 An exception thrown when the cluster size is below the defined threshold. 
 | 
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