Package com.caplin.permissioning

Class DefaultGlobalContext

java.lang.Object

com.caplin.permissioning.DefaultGlobalContext

All Implemented Interfaces:

GlobalContext

public class DefaultGlobalContext
extends Object
implements GlobalContext

This class implements the GlobalContext interface and is already deployed at the Permissioning Auth Module.

The methods of this class allow the Permissioning Auth Module to add data to the GlobalContext and to remove data from the GlobalContext. A custom SubjectMapper can also call one of the get() methods of this class to retrieve data from the GlobalContext.

You can also write a custom class that extends DefaultGlobalContext to provide additional methods that a custom SubjectMapper can call. If you write a custom GlobalContext, the class must be available on the classpath of the Permissioning Auth Module. It does not need to be deployed on the classpath of the PermissioningDataSource, as the PermissioningDataSource never loads the GlobalContext.

The document Caplin Xaqua: How To Create A Permissioning DataSource describes how to write, deploy, and configure a custom GlobalContext, and is included in the Permissioning DataSource kit.

The Global Context and Multiple Permissioning DataSources

Note that there is only one GlobalContext at the Permissioning Auth Module, either the DefaultGlobalContext or a custom GlobalContext, and it is shared by every PermissioningDataSource. Therefore if you have more than one PermissioningDataSource, make sure they do not overwrite each other's data.

Field Summary

Fields

Modifier and Type	Field	Description
protected final ConcurrentMap<String,Map<String,String>>	data	Stores the each Map passed in to the update() against the identifier it was passed in with.

Constructor Summary

Constructors

Constructor	Description
DefaultGlobalContext()	Creates a new empty DefaultGlobalContext.

Method Summary

Modifier and Type	Method	Description
Map<String,String>	get(String identifier)	Returns the Map of key-value pairs that are saved for the passed in identifier.
String	get(String identifier, String key)	Returns the value that is saved for the passed in identifier and key.
void	remove(String identifier)	Removes from the GlobalContext, the passed in identifier and the Map of key-value pairs for that identifier.
void	update(String identifier, Map<String,String> data)	Saves the passed in identifier and data, and makes the data available to the get() methods of this interface.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

data

protected final ConcurrentMap<String,Map<String,String>> data

Stores the each Map passed in to the update() against the identifier it was passed in with.

Constructor Details

DefaultGlobalContext

public DefaultGlobalContext()

Creates a new empty DefaultGlobalContext.

Method Details

update

public void update(String identifier,
 Map<String,String> data)

Saves the passed in identifier and data, and makes the data available to the get() methods of this interface.

If data has already been saved for this identifier, the method adds the key-value pairs in data to the saved data. If a key in data has already been saved for this identifier, the new value for the key replaces the old value.

The method is called by the Permissioning Auth Module when data for the GlobalContext is received from a PermissioningDataSource. A PermissioningDataSource sends the identifier and data to the Permissioning Auth Module when it calls updateGlobalContext() as part of a transaction.

Specified by:

update in interface GlobalContext

Parameters:

identifier - A String that identifies the passed in data.

data - A Map of key-value pairs for the passed in identifier.

get

public Map<String,String> get(String identifier)

Returns the Map of key-value pairs that are saved for the passed in identifier. This method is typically called by the mapSubject() method of a custom SubjectMapper.

Specified by:

get in interface GlobalContext

Parameters:

identifier - A String that identifies the Map to be returned.

Returns:

the Map of key-value pairs for the passed in identifier, or null if no Map has been saved for this identifier.

get

public String get(String identifier,
 String key)

Returns the value that is saved for the passed in identifier and key. This method is typically called by the mapSubject() method of a custom SubjectMapper.

A call to this method is equivalent to calling get(identifier), and then calling get(key) on the returned Map of key-value pairs.

Specified by:

get in interface GlobalContext

Parameters:

identifier - A String that identifies the Map of key-value pairs.

key - A key that identifies the value to be returned.

Returns:

the value that is saved for the passed in identifier and key, or null if no value has been saved for this identifier and key.

remove

public void remove(String identifier)

Removes from the GlobalContext, the passed in identifier and the Map of key-value pairs for that identifier. This method is called by the Permissioning Auth Module when a PermissioningDataSource calls removeGlobalContextData() as part of a transaction.

The method does not remove any data from the GlobalContext if there is no Map for this identifier.

Specified by:

remove in interface GlobalContext

Parameters:

identifier - A String that identifies the Map to be removed