MasterSelectionPolicy (Alluxio Core - Common Utilities 295 API)

All Known Implementing Classes:

AbstractMasterSelectionPolicy, SelectionPolicyAnyMaster, SelectionPolicyAnyStandbyMaster, SelectionPolicyPrimaryMaster, SelectionPolicySpecifiedMaster
```
public interface MasterSelectionPolicy
```
Interface for master selection policy that determines which master node a client should connect to.

Nested Class Summary

Nested Classes
Modifier and Type	Interface	Description
`static class`	`MasterSelectionPolicy.Factory`	Factory for `MasterSelectionPolicy`.
`static class`	`MasterSelectionPolicy.Type`	The enum for master selection policies.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.net.InetSocketAddress`	`getGrpcMasterAddress(MasterInquireClient masterInquireClient)`	Gets the master address the client makes gRPC request to.
`java.net.InetSocketAddress`	`getPrimaryMasterAddressCached(MasterInquireClient masterInquireClient)`	Get and cache the primary master address.
`MasterSelectionPolicy.Type`	`getType()`
`void`	`resetPrimaryMasterAddressCache()`	Resets the cached primary master address.

- Method Detail
  - getPrimaryMasterAddressCached
```
java.net.InetSocketAddress getPrimaryMasterAddressCached(MasterInquireClient masterInquireClient)
                                                  throws UnavailableException
```
    Get and cache the primary master address.
    
    Parameters:
    
    masterInquireClient - master inquire client
    
    Returns:
    
    the remote address of primary master gRPC server
    
    Throws:
    
    UnavailableException - if address cannot be determined
  - getGrpcMasterAddress
```
java.net.InetSocketAddress getGrpcMasterAddress(MasterInquireClient masterInquireClient)
                                         throws UnavailableException
```
    Gets the master address the client makes gRPC request to.
    
    Parameters:
    
    masterInquireClient - master inquire client
    
    Returns:
    
    the remote address of master gRPC server
    
    Throws:
    
    UnavailableException - if address cannot be determined
  - resetPrimaryMasterAddressCache
```
void resetPrimaryMasterAddressCache()
```
    Resets the cached primary master address.
  - getType
```
MasterSelectionPolicy.Type getType()
```
    Returns:
    
    the type of the master selection policy