Examples with Traverser com.google.common.graph.Traverser used on opensource projects

Example 1 with Traverser

use of com.google.common.graph.Traverser in project graylog2-server by Graylog2.

the class ContentPackService method getUninstallDetails.

private ContentPackUninstallDetails getUninstallDetails(ContentPackV1 contentPack, ContentPackInstallation installation) {
    final Entity rootEntity = EntityV1.createRoot(contentPack);
    final ImmutableMap<String, ValueReference> parameters = installation.parameters();
    final ImmutableGraph<Entity> dependencyGraph = buildEntityGraph(rootEntity, contentPack.entities(), parameters);
    final Traverser<Entity> entityTraverser = Traverser.forGraph(dependencyGraph);
    final Iterable<Entity> entitiesInOrder = entityTraverser.breadthFirst(rootEntity);
    final Set<NativeEntityDescriptor> nativeEntityDescriptors = new HashSet<>();
    entitiesInOrder.forEach((entity -> {
        if (entity.equals(rootEntity)) {
            return;
        }
        final Optional<NativeEntityDescriptor> nativeEntityDescriptorOptional = installation.entities().stream().filter(descriptor -> entity.id().equals(descriptor.contentPackEntityId())).findFirst();
        if (nativeEntityDescriptorOptional.isPresent()) {
            NativeEntityDescriptor nativeEntityDescriptor = nativeEntityDescriptorOptional.get();
            if (contentPackInstallationPersistenceService.countInstallationOfEntityById(nativeEntityDescriptor.id()) <= 1) {
                nativeEntityDescriptors.add(nativeEntityDescriptor);
            }
        }
    }));
    return ContentPackUninstallDetails.create(nativeEntityDescriptors);
}

Example 2 with Traverser

use of com.google.common.graph.Traverser in project graylog2-server by Graylog2.

the class ContentPackService method uninstallContentPack.

private ContentPackUninstallation uninstallContentPack(ContentPackInstallation installation, ContentPackV1 contentPack) {
    final Entity rootEntity = EntityV1.createRoot(contentPack);
    final ImmutableMap<String, ValueReference> parameters = installation.parameters();
    final ImmutableGraph<Entity> dependencyGraph = buildEntityGraph(rootEntity, contentPack.entities(), parameters);
    final Traverser<Entity> entityTraverser = Traverser.forGraph(dependencyGraph);
    final Iterable<Entity> entitiesInOrder = entityTraverser.breadthFirst(rootEntity);
    final Set<NativeEntityDescriptor> removedEntities = new HashSet<>();
    final Set<NativeEntityDescriptor> failedEntities = new HashSet<>();
    final Set<NativeEntityDescriptor> skippedEntities = new HashSet<>();
    try {
        for (Entity entity : entitiesInOrder) {
            if (entity.equals(rootEntity)) {
                continue;
            }
            final Optional<NativeEntityDescriptor> nativeEntityDescriptorOptional = installation.entities().stream().filter(descriptor -> entity.id().equals(descriptor.contentPackEntityId())).findFirst();
            final EntityWithExcerptFacade facade = entityFacades.getOrDefault(entity.type(), UnsupportedEntityFacade.INSTANCE);
            if (nativeEntityDescriptorOptional.isPresent()) {
                final NativeEntityDescriptor nativeEntityDescriptor = nativeEntityDescriptorOptional.get();
                final Optional nativeEntityOptional = facade.loadNativeEntity(nativeEntityDescriptor);
                final ModelId entityId = nativeEntityDescriptor.id();
                final long installCount = contentPackInstallationPersistenceService.countInstallationOfEntityById(entityId);
                final long systemFoundCount = contentPackInstallationPersistenceService.countInstallationOfEntityByIdAndFoundOnSystem(entityId);
                if (installCount > 1 || (installCount == 1 && systemFoundCount >= 1)) {
                    skippedEntities.add(nativeEntityDescriptor);
                    LOG.debug("Did not remove entity since other content pack installations still use them: {}", nativeEntityDescriptor);
                } else if (nativeEntityOptional.isPresent()) {
                    final Object nativeEntity = nativeEntityOptional.get();
                    LOG.trace("Removing existing native entity for {} ({})", nativeEntityDescriptor);
                    try {
                        // The EntityFacade#delete() method expects the actual entity object
                        // noinspection unchecked
                        facade.delete(((NativeEntity) nativeEntity).entity());
                        removedEntities.add(nativeEntityDescriptor);
                    } catch (Exception e) {
                        LOG.warn("Couldn't remove native entity {}", nativeEntity);
                        failedEntities.add(nativeEntityDescriptor);
                    }
                } else {
                    LOG.trace("Couldn't find existing native entity for {} ({})", nativeEntityDescriptor);
                }
            }
        }
    } catch (Exception e) {
        throw new ContentPackException("Failed to remove content pack <" + contentPack.id() + "/" + contentPack.revision() + ">", e);
    }
    final int deletedInstallations = contentPackInstallationPersistenceService.deleteById(installation.id());
    LOG.debug("Deleted {} installation(s) of content pack {}", deletedInstallations, contentPack.id());
    return ContentPackUninstallation.builder().entities(ImmutableSet.copyOf(removedEntities)).skippedEntities(ImmutableSet.copyOf(skippedEntities)).failedEntities(ImmutableSet.copyOf(failedEntities)).build();
}