Java tutorial
/* * 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.jclouds.digitalocean2.compute.functions; import static com.google.common.base.Preconditions.checkNotNull; import static com.google.common.collect.Iterables.find; import static org.jclouds.digitalocean2.compute.internal.ImageInRegion.encodeId; import java.util.Map; import java.util.Set; import javax.annotation.Resource; import javax.inject.Inject; import javax.inject.Named; import javax.inject.Singleton; import org.jclouds.collect.Memoized; import org.jclouds.compute.domain.Hardware; import org.jclouds.compute.domain.Image; import org.jclouds.compute.domain.NodeMetadata; import org.jclouds.compute.domain.NodeMetadata.Status; import org.jclouds.compute.domain.NodeMetadataBuilder; import org.jclouds.compute.functions.GroupNamingConvention; import org.jclouds.compute.reference.ComputeServiceConstants; import org.jclouds.digitalocean2.compute.internal.ImageInRegion; import org.jclouds.digitalocean2.domain.Droplet; import org.jclouds.digitalocean2.domain.Networks; import org.jclouds.digitalocean2.domain.Region; import org.jclouds.domain.Credentials; import org.jclouds.domain.Location; import org.jclouds.domain.LoginCredentials; import org.jclouds.logging.Logger; import com.google.common.base.Function; import com.google.common.base.Optional; import com.google.common.base.Predicate; import com.google.common.base.Supplier; import com.google.common.collect.FluentIterable; import com.google.common.collect.Iterables; /** * Transforms an {@link Droplet} to the jclouds portable model. */ @Singleton public class DropletToNodeMetadata implements Function<Droplet, NodeMetadata> { @Resource @Named(ComputeServiceConstants.COMPUTE_LOGGER) protected Logger logger = Logger.NULL; private final Supplier<Map<String, ? extends Image>> images; private final Supplier<Map<String, ? extends Hardware>> hardwares; private final Supplier<Set<? extends Location>> locations; private final Function<Droplet.Status, Status> toPortableStatus; private final GroupNamingConvention groupNamingConvention; private final Map<String, Credentials> credentialStore; @Inject DropletToNodeMetadata(Supplier<Map<String, ? extends Image>> images, Supplier<Map<String, ? extends Hardware>> hardwares, @Memoized Supplier<Set<? extends Location>> locations, Function<Droplet.Status, Status> toPortableStatus, GroupNamingConvention.Factory groupNamingConvention, Map<String, Credentials> credentialStore) { this.images = checkNotNull(images, "images cannot be null"); this.hardwares = checkNotNull(hardwares, "hardwares cannot be null"); this.locations = checkNotNull(locations, "locations cannot be null"); this.toPortableStatus = checkNotNull(toPortableStatus, "toPortableStatus cannot be null"); this.groupNamingConvention = checkNotNull(groupNamingConvention, "groupNamingConvention cannot be null") .createWithoutPrefix(); this.credentialStore = checkNotNull(credentialStore, "credentialStore cannot be null"); } @Override public NodeMetadata apply(Droplet input) { NodeMetadataBuilder builder = new NodeMetadataBuilder(); builder.ids(String.valueOf(input.id())); builder.name(input.name()); builder.hostname(input.name()); builder.group(groupNamingConvention.extractGroup(input.name())); builder.hardware(getHardware(input.sizeSlug())); builder.location(getLocation(input.region())); Optional<? extends Image> image = findImage(input.image(), input.region().slug()); if (image.isPresent()) { builder.imageId(image.get().getId()); builder.operatingSystem(image.get().getOperatingSystem()); } else { logger.info( ">> image with id %s for droplet %s was not found. " + "This might be because the image that was used to create the droplet has a new id.", input.image().id(), input.id()); } builder.status(toPortableStatus.apply(input.status())); builder.backendStatus(input.status().name()); if (!input.getPublicAddresses().isEmpty()) { builder.publicAddresses(FluentIterable.from(input.getPublicAddresses()) .transform(new Function<Networks.Address, String>() { @Override public String apply(final Networks.Address input) { return input.ip(); } })); } if (!input.getPrivateAddresses().isEmpty()) { builder.privateAddresses(FluentIterable.from(input.getPrivateAddresses()) .transform(new Function<Networks.Address, String>() { @Override public String apply(final Networks.Address input) { return input.ip(); } })); } // DigitalOcean does not provide a way to get the credentials. // Try to return them from the credential store Credentials credentials = credentialStore.get("node#" + input.id()); if (credentials instanceof LoginCredentials) { builder.credentials(LoginCredentials.class.cast(credentials)); } return builder.build(); } protected Optional<? extends Image> findImage(org.jclouds.digitalocean2.domain.Image image, String region) { return Optional.fromNullable(images.get().get(encodeId(ImageInRegion.create(image, region)))); } protected Hardware getHardware(final String slug) { return Iterables.find(hardwares.get().values(), new Predicate<Hardware>() { @Override public boolean apply(Hardware input) { return input.getId().equals(slug); } }); } protected Location getLocation(final Region region) { return find(locations.get(), new Predicate<Location>() { @Override public boolean apply(Location location) { return region != null && region.slug().equals(location.getId()); } }, null); } }