software.amazon.awssdk.regions.internal.PartitionServiceMetadata Maven / Gradle / Ivy

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A single bundled dependency that includes all service and dependent JARs with third-party libraries relocated to different namespaces.

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/*
 * Copyright 2010-2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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 software.amazon.awssdk.regions.internal;

import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import software.amazon.awssdk.annotations.SdkInternalApi;
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.regions.RegionMetadata;
import software.amazon.awssdk.regions.ServiceMetadata;
import software.amazon.awssdk.regions.internal.model.CredentialScope;
import software.amazon.awssdk.regions.internal.model.Endpoint;
import software.amazon.awssdk.regions.internal.model.Partition;
import software.amazon.awssdk.regions.internal.model.Service;

@SdkInternalApi
public final class PartitionServiceMetadata implements ServiceMetadata {

    private static final String SERVICE = "{service}";
    private static final String REGION = "{region}";
    private static final String DNS_SUFFIX = "{dnsSuffix}";

    private final String service;
    private final Map servicePartitionData;

    public PartitionServiceMetadata(String service,
                                    Map servicePartitionData) {
        this.service = service;
        this.servicePartitionData = servicePartitionData;
    }

    @Override
    public URI endpointFor(Region region) {
        RegionMetadata regionMetadata = RegionMetadata.of(region);
        Endpoint endpoint = computeEndpoint(service, region);
        return URI.create(endpoint.getHostname()
                                  .replace(SERVICE, service)
                                  .replace(REGION, region.id())
                                  .replace(DNS_SUFFIX, regionMetadata.domain()));
    }

    @Override
    public Region signingRegion(Region region) {
        CredentialScope credentialScope = computeEndpoint(service, region).getCredentialScope();
        return Region.of(credentialScope != null && credentialScope.getRegion() != null ?
                                 credentialScope.getRegion() : region.id());
    }

    private Endpoint computeEndpoint(String serviceName, Region region) {
        RegionMetadata regionMetadata = RegionMetadata.of(region);
        Partition partitionData = servicePartitionData.get(regionMetadata.partition());
        Service service = partitionData.getServices().get(serviceName);

        return partitionData.getDefaults()
                            .merge(service != null ? service.getDefaults() : null)
                            .merge(service != null && service.getEndpoints() != null ?
                                   service.getEndpoints().get(region.id()) : null);
    }

    @Override
    public List regions() {
        List regions = new ArrayList<>();
        servicePartitionData.forEach((key, value) -> {
            Service serviceData = value.getServices().get(service);
            if (serviceData != null) {
                serviceData.getEndpoints().keySet().forEach(r -> regions.add(Region.of(r)));
            }
        });

        return regions;
    }
}