org.keycloak.models.dblock.DBLockProvider Maven / Gradle / Ivy
/*
* Copyright 2016 Red Hat, Inc. and/or its affiliates
* and other contributors as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.keycloak.models.dblock;
import org.keycloak.provider.Provider;
/**
* Global database lock to ensure that some actions in DB can be done just be one cluster node at a time.
*
*
* @author Marek Posolda
*/
public interface DBLockProvider extends Provider {
/**
* Try to retrieve DB lock or wait if retrieve was unsuccessful. Throw exception if lock can't be retrieved within specified timeout (900 seconds by default)
*/
void waitForLock();
/**
* Release previously acquired lock
*/
void releaseLock();
/**
* Check if I have lock
*
* @return
*/
boolean hasLock();
/**
* @return true if provider supports forced unlock at startup
*/
boolean supportsForcedUnlock();
/**
* Will destroy whole state of DB lock (drop table/collection to track locking).
* */
void destroyLockInfo();
}