Quorum (ActiveMQ Artemis Server 2.29.0 API)

All Known Implementing Classes:

SharedNothingBackupQuorum
```
public interface Quorum
```
A quorum can be registered with the QuorumManager to receive notifications about the state of a cluster. It can then use the QuorumManager for the quorum within a cluster to vote on a specific outcome.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`close()`	called if the quorum manager is stopping so we can clean up
`String`	`getName()`	the name of the Quorum.
`void`	`nodeDown(Topology topology, long eventUID, String nodeID)`	called by the quorum when a node in the quorum goes down
`void`	`nodeUp(Topology topology)`	called by the quorum when a node in the quorum goes up
`void`	`setQuorumManager(QuorumManager quorumManager)`	called by the quorum manager when a quorum is registered

- Method Detail
  - getName
```
String getName()
```
    the name of the Quorum. this should be unique and is used to locate the correct quorum to use for voting
  - setQuorumManager
```
void setQuorumManager(QuorumManager quorumManager)
```
    called by the quorum manager when a quorum is registered
  - nodeDown
```
void nodeDown(Topology topology,
              long eventUID,
              String nodeID)
```
    called by the quorum when a node in the quorum goes down
  - nodeUp
```
void nodeUp(Topology topology)
```
    called by the quorum when a node in the quorum goes up
  - close
```
void close()
```
    called if the quorum manager is stopping so we can clean up