| /* |
| * 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.jackrabbit.oak.composite; |
| |
| import java.util.Arrays; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.stream.Stream; |
| import org.apache.jackrabbit.oak.spi.mount.MountInfoProvider; |
| import org.apache.jackrabbit.oak.spi.mount.Mounts; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.ServiceRegistration; |
| import org.osgi.service.component.annotations.Activate; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.Deactivate; |
| import org.osgi.service.component.annotations.Reference; |
| import org.osgi.service.component.annotations.ReferenceCardinality; |
| import org.osgi.service.component.annotations.ReferencePolicyOption; |
| import org.osgi.service.metatype.annotations.AttributeDefinition; |
| import org.osgi.service.metatype.annotations.Designate; |
| import org.osgi.service.metatype.annotations.ObjectClassDefinition; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import static java.util.stream.Collectors.toSet; |
| |
| import java.util.ArrayList; |
| |
| @Component |
| @Designate(ocd = MountInfoProviderService.Props.class) |
| public class MountInfoProviderService { |
| private final static Logger LOG = LoggerFactory.getLogger(MountInfoProviderService.class); |
| |
| @ObjectClassDefinition(name = "MountInfoProviderService Properties") |
| @interface Props { |
| |
| String DEFAULT_MOUNT_NAME = "private"; |
| |
| @AttributeDefinition( |
| name = "Expected mounts", |
| description = "List of all required mount names" |
| ) |
| String[] expectedMounts() default {}; |
| |
| @AttributeDefinition( |
| name = "Mounted paths", |
| description = "Paths which are part of private mount" |
| ) |
| @Deprecated |
| String[] mountedPaths() default {}; |
| |
| @AttributeDefinition( |
| name = "Mount name", |
| description = "Name of the mount" |
| ) |
| @Deprecated |
| String mountName() default DEFAULT_MOUNT_NAME; |
| |
| @AttributeDefinition( |
| name = "Readonly", |
| description = "If enabled then mount would be considered as readonly" |
| ) |
| @Deprecated |
| boolean readOnlyMount() default true; |
| |
| @AttributeDefinition( |
| name = "Paths supporting fragments", |
| description = "oak:mount-* under this paths will be included to mounts" |
| ) |
| @Deprecated |
| String[] pathsSupportingFragments() default {"/"}; |
| |
| } |
| |
| private final List<MountInfoConfig> mountInfoConfigs = new ArrayList<>(); |
| |
| private Set<String> expectedMounts; |
| private ServiceRegistration reg; |
| private BundleContext context; |
| |
| @Activate |
| public void activate(BundleContext bundleContext, Props props) { |
| String[] expectedMounts = props.expectedMounts(); |
| if (expectedMounts != null) { |
| this.expectedMounts = Stream.of(expectedMounts) |
| .map(String::trim) |
| .filter(s -> !s.isEmpty()) |
| .collect(toSet()); |
| } else { |
| this.expectedMounts = new HashSet<>(); |
| } |
| context = bundleContext; |
| addMountInfoConfigFromProperties(props); |
| registerMountInfoProvider(); |
| } |
| |
| /** |
| * @deprecated only used for backward-compatibility. Now mount configurations should be provided with the {@code MountInfoConfig} class. |
| */ |
| @Deprecated |
| private void addMountInfoConfigFromProperties(Props mountInfoProps) { |
| String[] paths = mountInfoProps.mountedPaths(); |
| String mountName = mountInfoProps.mountName(); |
| boolean readOnly = mountInfoProps.readOnlyMount(); |
| String[] pathsSupportingFragments = mountInfoProps.pathsSupportingFragments(); |
| if (paths != null && paths.length > 0) { |
| mountInfoConfigs.add(new MountInfoConfig(mountName, Arrays.asList(paths), Arrays.asList(pathsSupportingFragments), readOnly)); |
| expectedMounts.add(mountName); |
| } |
| } |
| |
| @Reference(cardinality = ReferenceCardinality.MULTIPLE, policyOption = ReferencePolicyOption.GREEDY) |
| protected void bindMountInfoConfig(MountInfoConfig config) { |
| if (!config.getPaths().isEmpty()) { // Ignore empty configs |
| mountInfoConfigs.add(config); |
| } |
| // this is a static reference, i.e. called before activate(), the registration happens during activate() |
| } |
| |
| private void registerMountInfoProvider() { |
| if (context == null || reg != null) { |
| return; |
| } |
| Set<String> providedMounts = mountInfoConfigs.stream().map(MountInfoConfig::getMountName).collect(toSet()); |
| if (!providedMounts.containsAll(expectedMounts)) { |
| LOG.info("Not all expected mounts are present yet (expected: {}, current: {}). Postponing configuration...", |
| expectedMounts, providedMounts); |
| return; |
| } |
| |
| MountInfoProvider mip; |
| |
| boolean hasPaths = mountInfoConfigs.stream().anyMatch(conf -> !conf.getPaths().isEmpty()); |
| if (hasPaths) { |
| Mounts.Builder builder = Mounts.newBuilder(); |
| |
| for (MountInfoConfig mountInfoConfig : mountInfoConfigs) { |
| if (!mountInfoConfig.getPaths().isEmpty()) { |
| builder.mount( |
| mountInfoConfig.getMountName(), |
| mountInfoConfig.isReadOnly(), // read-only |
| mountInfoConfig.getPathsSupportingFragments(), |
| mountInfoConfig.getPaths()); |
| |
| LOG.info("Enabling mount for {} with paths: {}", mountInfoConfig.getMountName(), mountInfoConfig.getPaths()); |
| } |
| } |
| mip = builder.build(); |
| } else { |
| mip = Mounts.defaultMountInfoProvider(); |
| LOG.info("No mount config provided. Mounting would be disabled"); |
| } |
| |
| reg = context.registerService(MountInfoProvider.class.getName(), mip, null); |
| } |
| |
| @Deactivate |
| private void deactivate() { |
| if (reg != null) { |
| reg.unregister(); |
| reg = null; |
| } |
| } |
| } |