| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.sling.distribution.queue.impl.resource; |
| |
| import org.apache.sling.api.resource.LoginException; |
| import org.apache.sling.api.resource.PersistenceException; |
| import org.apache.sling.api.resource.Resource; |
| import org.apache.sling.api.resource.ResourceResolver; |
| import org.apache.sling.api.resource.ResourceResolverFactory; |
| import org.apache.sling.distribution.queue.DistributionQueueEntry; |
| import org.apache.sling.distribution.queue.DistributionQueueItem; |
| import org.apache.sling.distribution.queue.DistributionQueueItemStatus; |
| import org.apache.sling.distribution.queue.DistributionQueueStatus; |
| import org.apache.sling.distribution.queue.impl.DistributionQueueUtils; |
| import org.apache.sling.distribution.util.impl.DistributionUtils; |
| import org.jetbrains.annotations.NotNull; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /* |
| * ActiveResourceQueue, in conjunction with a queue-processor active only on a single Sling instance, |
| * provides an Active, JCR resource-backed queue. |
| * |
| * It maintains the dequeue attempts in JCR to reflect consistent dequeue attempt status across all cluster instances |
| */ |
| public class ActiveResourceQueue extends ResourceQueue { |
| |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| public ActiveResourceQueue(ResourceResolverFactory resolverFactory, String serviceName, String queueName, String rootPath) { |
| super(resolverFactory, serviceName, queueName, rootPath); |
| } |
| |
| @NotNull |
| @Override |
| public DistributionQueueStatus getStatus() { |
| ResourceResolver resourceResolver = null; |
| try { |
| resourceResolver = DistributionUtils.loginService(resolverFactory, serviceName); |
| Resource queueRoot = ResourceQueueUtils.getRootResource(resourceResolver, queueRootPath); |
| |
| int count = ResourceQueueUtils.getResourceCount(queueRoot); |
| |
| DistributionQueueEntry head = ResourceQueueUtils.getHead(queueRoot); |
| DistributionQueueItem firstItem = (null != head)? head.getItem(): null; |
| DistributionQueueItemStatus firstItemStatus = (null != head)? head.getStatus(): null; |
| log.debug("Queue has {} items, with following status for the head: {}", |
| count, firstItemStatus); |
| return new DistributionQueueStatus(count, |
| DistributionQueueUtils.calculateState(firstItem, firstItemStatus)); |
| } catch (LoginException | PersistenceException e) { |
| throw new RuntimeException(e); |
| } finally { |
| DistributionUtils.safelyLogout(resourceResolver); |
| } |
| } |
| |
| public void recordProcessingAttempt(@NotNull DistributionQueueEntry entry) { |
| ResourceResolver resourceResolver = null; |
| try { |
| resourceResolver = DistributionUtils.loginService(resolverFactory, serviceName); |
| Resource queueRoot = ResourceQueueUtils.getRootResource(resourceResolver, queueRootPath); |
| Resource queueItemResource = ResourceQueueUtils.getResourceById(queueRoot, entry.getId()); |
| ResourceQueueUtils.incrementProcessingAttemptForQueueItem(queueItemResource); |
| resourceResolver.commit(); |
| log.debug("incremented processing-attempt for queue entry with id: {}", entry.getId()); |
| } catch (Exception e) { |
| log.warn("Couldn't increment processing-attempt for queue entry with id: {}", entry.getId()); |
| } finally { |
| DistributionUtils.safelyLogout(resourceResolver); |
| } |
| } |
| } |