114 lines
3.9 KiB
Text
114 lines
3.9 KiB
Text
|
|
=== Provider interfaces
|
|
|
|
When building an implementation of the User Storage SPI you have to define a provider class and a provider factory.
|
|
Provider class instances are created per transaction by provider factories.
|
|
Provider classes do all the heavy lifting of user lookup and other user operations. They must implement the
|
|
`org.keycloak.storage.UserStorageProvider` interface.
|
|
|
|
[source,java]
|
|
----
|
|
package org.keycloak.storage;
|
|
|
|
public interface UserStorageProvider extends Provider {
|
|
|
|
|
|
/**
|
|
* Callback when a realm is removed. Implement this if, for example, you want to do some
|
|
* cleanup in your user storage when a realm is removed
|
|
*
|
|
* @param realm
|
|
*/
|
|
default
|
|
void preRemove(RealmModel realm) {
|
|
|
|
}
|
|
|
|
/**
|
|
* Callback when a group is removed. Allows you to do things like remove a user
|
|
* group mapping in your external store if appropriate
|
|
*
|
|
* @param realm
|
|
* @param group
|
|
*/
|
|
default
|
|
void preRemove(RealmModel realm, GroupModel group) {
|
|
|
|
}
|
|
|
|
/**
|
|
* Callback when a role is removed. Allows you to do things like remove a user
|
|
* role mapping in your external store if appropriate
|
|
|
|
* @param realm
|
|
* @param role
|
|
*/
|
|
default
|
|
void preRemove(RealmModel realm, RoleModel role) {
|
|
|
|
}
|
|
|
|
}
|
|
----
|
|
|
|
You may be thinking that the `UserStorageProvider` interface is pretty sparse? You'll see later in this chapter that there are other mix-in interfaces your provider class may implement to support the meat of user integration.
|
|
|
|
`UserStorageProvider` instances are created once per transaction. When the transaction is complete, the `UserStorageProvider.close()` method is invoked and the instance is then garbage collected. Instances are created by provider factories. Provider factories implement the `org.keycloak.storage.UserStorageProviderFactory` interface.
|
|
|
|
[source,java]
|
|
----
|
|
package org.keycloak.storage;
|
|
|
|
/**
|
|
* @author <a href="mailto:bill@burkecentral.com">Bill Burke</a>
|
|
* @version $Revision: 1 $
|
|
*/
|
|
public interface UserStorageProviderFactory<T extends UserStorageProvider> extends ComponentFactory<T, UserStorageProvider> {
|
|
|
|
/**
|
|
* This is the name of the provider and will be shown in the admin console as an option.
|
|
*
|
|
* @return
|
|
*/
|
|
@Override
|
|
String getId();
|
|
|
|
/**
|
|
* called per Keycloak transaction.
|
|
*
|
|
* @param session
|
|
* @param model
|
|
* @return
|
|
*/
|
|
T create(KeycloakSession session, ComponentModel model);
|
|
...
|
|
}
|
|
----
|
|
|
|
Provider factory classes must specify the concrete provider class as a template parameter when implementing the
|
|
`UserStorageProviderFactory`. This is a must as the runtime will introspect this class to scan for its capabilities
|
|
(the other interfaces it implements). So for example, if your provider class is named `FileProvider`, then the
|
|
factory class should look like this:
|
|
|
|
[source,java]
|
|
----
|
|
public class FileProviderFactory implements UserStorageProviderFactory<FileProvider> {
|
|
|
|
public String getId() { return "file-provider"; }
|
|
|
|
public FileProvider create(KeycloakSession session, ComponentModel model) {
|
|
...
|
|
}
|
|
----
|
|
|
|
The `getId()` method returns the name of the User Storage provider. This id will be displayed in the admin console's
|
|
User Federation page when you want to enable the provider for a specific realm.
|
|
|
|
The `create()` method is responsible for allocating an instance of the provider class. It takes a `org.keycloak.models.KeycloakSession`
|
|
parameter. This object can be used to look up other information and metadata as well as provide access to various other
|
|
components within the runtime. The `ComponentModel` parameter represents how the provider was enabled and configured within
|
|
a specific realm. It contains the instance id of the enabled provider as well as any configuration you may have specified
|
|
for it when you enabled through the admin console.
|
|
|
|
The `UserStorageProviderFactory` has other capabilities as well which we will go over later in this chapter.
|
|
|