org.jenkinsci.remoting

Class Role

java.lang.Object

org.jenkinsci.remoting.Role

public final class Role
extends Object

Represents different roles two sides of the channel plays.

Often the communication on Channel is asymmetric (for example, one side acts like a server and the other side acts like a client), and therefore it is useful to be able to mark Callable with the intended parties that are supposed to run them. This in turn allows parties to verify that it is not running Callables that it is not supposed to be executing.

Roles are compared based on the instance equality, so typically they'd be instantiated as singletons. For example, if you are designing a client/server protocol, you would have two role instances like this:

 public class MyProtocol {
     public static final Role SERVER = new Role("server");
     public static final Role CLIENT = new Role("client");
 }
 

Then the callables that are meant to be run on the client would check CLIENT from RoleSensitive.checkRoles(RoleChecker):

 // from the server
 channelToClient.call(new Callable<Void,IOException>() {
     Void call() {
         ...
     }
     void checkRoles(RoleChecker checker) {
          checker.check(this,MyProtocol.CLIENT);
     }
 });
 

Author:

Kohsuke Kawaguchi

See Also:

RoleSensitive, RoleChecker

Field Summary

Fields

Modifier and Type	Field and Description
static Role	UNKNOWN Used as a place holder when Callable didn't declare any role.
static Collection<Role>	UNKNOWN_SET Convenience singleton collection that only include UNKNOWN

Constructor Summary

Constructors

Constructor and Description
Role(Class<?> name)
Role(String name)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
String	getName() Gets a human readable name of this role.
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

UNKNOWN

public static final Role UNKNOWN

Used as a place holder when Callable didn't declare any role.

UNKNOWN_SET

public static final Collection<Role> UNKNOWN_SET

Convenience singleton collection that only include UNKNOWN

Constructor Detail

Role

public Role(String name)

Role

public Role(Class<?> name)

Method Detail

getName

public String getName()

Gets a human readable name of this role. Names are not a formal part of the role equality. That is, two Role instances are considered different even if they have the same name.

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object