Class AbstractUserProvider

java.lang.Object

io.fluxzero.sdk.tracking.handling.authentication.AbstractUserProvider

All Implemented Interfaces:

UserProvider

public abstract class AbstractUserProvider
extends Object
implements UserProvider

Abstract base class for implementing UserProviders that resolve user identities via a metadata key.

This implementation provides a reusable foundation for extracting, injecting, and managing User instances within Metadata, commonly used in message handling scenarios. Most concrete UserProvider implementations can extend this class to inherit standard behavior for:

• Retrieving a user from message metadata via a configured key
• Checking whether a user is present in metadata
• Inserting or removing user entries in metadata

Metadata key

The default metadata key used for storing user objects is DEFAULT_USER_KEY, which resolves to "$user". Custom keys can also be provided via the constructor for flexibility across different application contexts.

See Also:

• User
• UserProvider
• Metadata
• HasMessage

Field Summary

Fields

Modifier and Type	Field	Description
static String	DEFAULT_USER_KEY	Default key used in Metadata to store User objects.

Fields inherited from interface UserProvider

defaultUserProvider

Constructor Summary

Constructors

Constructor	Description
AbstractUserProvider(Class<? extends User> userClass)	Constructs an AbstractUserProvider using the default metadata key DEFAULT_USER_KEY.

Method Summary

Modifier and Type	Method	Description
Metadata	addToMetadata(Metadata metadata, User user, boolean ifAbsent)	Adds a User to the metadata using the configured key.
boolean	containsUser(Metadata metadata)	Returns true if the metadata contains a user entry under the configured key.
User	fromMessage(HasMessage message)	Extracts a User from the metadata of a message.
Metadata	removeFromMetadata(Metadata metadata)	Removes the user entry from the metadata.

Methods inherited from class Object

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

Methods inherited from interface UserProvider

addToMetadata, andThen, getActiveUser, getSystemUser, getUserById

Field Details

DEFAULT_USER_KEY

public static String DEFAULT_USER_KEY

Default key used in Metadata to store User objects.

Constructor Details

AbstractUserProvider

public AbstractUserProvider(Class<? extends User> userClass)

Constructs an AbstractUserProvider using the default metadata key DEFAULT_USER_KEY.

Parameters:

userClass - the concrete user class this provider resolves

Method Details

fromMessage

public User fromMessage(HasMessage message)

Extracts a User from the metadata of a message.

Uses the configured metadataKey to locate the user in the metadata of the given message.

Specified by:

fromMessage in interface UserProvider

Parameters:

message - the message containing metadata

Returns:

the resolved User, or null if not found

containsUser

public boolean containsUser(Metadata metadata)

Returns true if the metadata contains a user entry under the configured key.

Specified by:

containsUser in interface UserProvider

Parameters:

metadata - the metadata to inspect

Returns:

true if a user is present, otherwise false

removeFromMetadata

public Metadata removeFromMetadata(Metadata metadata)

Removes the user entry from the metadata.

Specified by:

removeFromMetadata in interface UserProvider

Parameters:

metadata - the original metadata

Returns:

a new Metadata instance without the user entry

addToMetadata

public Metadata addToMetadata(Metadata metadata,
 User user,
 boolean ifAbsent)

Adds a User to the metadata using the configured key.

Specified by:

addToMetadata in interface UserProvider

Parameters:

metadata - the original metadata

user - the user to add

ifAbsent - whether to only add the user if it is not already present

Returns:

updated metadata including the user