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- /*
- * SonarQube
- * Copyright (C) 2009-2019 SonarSource SA
- * mailto:info AT sonarsource DOT com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
- package org.sonar.server.util;
-
- import org.sonar.api.ce.ComputeEngineSide;
- import org.sonar.api.server.ServerSide;
- import org.sonar.db.DbClient;
- import org.sonar.db.DbSession;
-
- /**
- * Provide a simple mechanism to manage global locks across multiple nodes running in a cluster.
- * In the target use case multiple nodes try to execute something at around the same time,
- * and only the first should succeed, and the rest do nothing.
- */
- @ComputeEngineSide
- @ServerSide
- public class GlobalLockManager {
-
- static final int DEFAULT_LOCK_DURATION_SECONDS = 180;
-
- private final DbClient dbClient;
-
- public GlobalLockManager(DbClient dbClient) {
- this.dbClient = dbClient;
- }
-
- /**
- * Try to acquire a lock on the given name in the default namespace,
- * using the generic locking mechanism of {@see org.sonar.db.property.InternalPropertiesDao}.
- */
- public boolean tryLock(String name) {
- return tryLock(name, DEFAULT_LOCK_DURATION_SECONDS);
- }
-
- public boolean tryLock(String name, int durationSecond) {
- try (DbSession dbSession = dbClient.openSession(false)) {
- boolean success = dbClient.internalPropertiesDao().tryLock(dbSession, name, durationSecond);
- dbSession.commit();
- return success;
- }
- }
- }
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