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- /*
- * SonarQube
- * Copyright (C) 2009-2021 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.ce;
-
- import java.util.Set;
- import java.util.concurrent.TimeUnit;
- import java.util.concurrent.locks.Condition;
- import java.util.concurrent.locks.Lock;
- import org.sonar.ce.taskprocessor.CeWorker;
- import org.sonar.ce.taskprocessor.CeWorkerFactory;
-
- import static com.google.common.base.Preconditions.checkState;
- import static org.sonar.core.util.stream.MoreCollectors.toSet;
-
- /**
- * Provide the set of worker's UUID in a non clustered SonarQube instance
- */
- public class StandaloneCeDistributedInformation implements CeDistributedInformation {
- private final CeWorkerFactory ceCeWorkerFactory;
- private Set<String> workerUUIDs;
-
- private Lock cleanJobLock = new NonConcurrentLock();
-
- public StandaloneCeDistributedInformation(CeWorkerFactory ceCeWorkerFactory) {
- this.ceCeWorkerFactory = ceCeWorkerFactory;
- }
-
- @Override
- public Set<String> getWorkerUUIDs() {
- checkState(workerUUIDs != null, "Invalid call, broadcastWorkerUUIDs() must be called first.");
- return workerUUIDs;
- }
-
- @Override
- public void broadcastWorkerUUIDs() {
- Set<CeWorker> workers = ceCeWorkerFactory.getWorkers();
- workerUUIDs = workers.stream().map(CeWorker::getUUID).collect(toSet(workers.size()));
- }
-
- /**
- * Since StandaloneCeDistributedInformation in fact does not provide any distribution support, the lock returned by
- * this method provides no concurrency support at all.
- */
- @Override
- public Lock acquireCleanJobLock() {
- return cleanJobLock;
- }
-
- private static class NonConcurrentLock implements Lock {
- @Override
- public void lock() {
- // return immediately and never block
- }
-
- @Override
- public void lockInterruptibly() {
- // return immediately and never block
- }
-
- @Override
- public boolean tryLock() {
- // always succeed
- return true;
- }
-
- @Override
- public boolean tryLock(long time, TimeUnit unit) {
- // always succeed
- return true;
- }
-
- @Override
- public void unlock() {
- // nothing to do
- }
-
- @Override
- public Condition newCondition() {
- throw new UnsupportedOperationException("newCondition not supported");
- }
- }
- }
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