DefaultPrincipalToLocal (Storm 2.7.1 API)

java.lang.Object
- org.apache.storm.security.auth.DefaultPrincipalToLocal

All Implemented Interfaces:

IPrincipalToLocal
```
public class DefaultPrincipalToLocal
extends Object
implements IPrincipalToLocal
```
Storm can be configured to launch worker processed as a given user. Some transports need to map the Principal to a local user name.

Constructor Summary

Constructors
Constructor Description

DefaultPrincipalToLocal()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`prepare(Map<String,Object> topoConf)`	Invoked once immediately after construction.
`String`	`toLocal(String principal)`	Convert a Principal to a local user name.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.storm.security.auth.IPrincipalToLocal
toLocal

- Constructor Detail
  - DefaultPrincipalToLocal
```
public DefaultPrincipalToLocal()
```
- Method Detail
  - prepare
```
public void prepare(Map<String,Object> topoConf)
```
    Invoked once immediately after construction.
    
    Specified by:
    
    prepare in interface IPrincipalToLocal
    
    Parameters:
    
    topoConf - Storm configuration
  - toLocal
```
public String toLocal(String principal)
```
    Convert a Principal to a local user name.
    
    Specified by:
    
    toLocal in interface IPrincipalToLocal
    
    Parameters:
    
    principal - the principal to convert
    
    Returns:
    
    The local user name.