| 1 | /** |
| 2 | * |
| 3 | * Copyright (C) 2011 Cloud Conscious, LLC. <info@cloudconscious.com> |
| 4 | * |
| 5 | * ==================================================================== |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | * ==================================================================== |
| 18 | */ |
| 19 | package org.jclouds.atmos.functions; |
| 20 | |
| 21 | import static com.google.common.base.Preconditions.checkNotNull; |
| 22 | import static org.jclouds.util.Throwables2.propagateOrNull; |
| 23 | |
| 24 | import java.net.URI; |
| 25 | |
| 26 | import javax.annotation.Nullable; |
| 27 | |
| 28 | import org.jclouds.blobstore.KeyAlreadyExistsException; |
| 29 | import org.jclouds.http.HttpRequest; |
| 30 | import org.jclouds.rest.InvocationContext; |
| 31 | |
| 32 | import com.google.common.annotations.VisibleForTesting; |
| 33 | import com.google.common.base.Function; |
| 34 | |
| 35 | /** |
| 36 | * |
| 37 | * @author Adrian Cole |
| 38 | */ |
| 39 | public class ReturnEndpointIfAlreadyExists implements Function<Exception, URI>, |
| 40 | InvocationContext<ReturnEndpointIfAlreadyExists> { |
| 41 | |
| 42 | private URI endpoint; |
| 43 | |
| 44 | public URI apply(Exception from) { |
| 45 | if (checkNotNull(from, "exception") instanceof KeyAlreadyExistsException) { |
| 46 | return endpoint; |
| 47 | } |
| 48 | return URI.class.cast(propagateOrNull(from)); |
| 49 | } |
| 50 | |
| 51 | @Override |
| 52 | public ReturnEndpointIfAlreadyExists setContext(HttpRequest request) { |
| 53 | return setEndpoint(request == null ? null : request.getEndpoint()); |
| 54 | } |
| 55 | |
| 56 | @VisibleForTesting |
| 57 | ReturnEndpointIfAlreadyExists setEndpoint(@Nullable URI endpoint) { |
| 58 | this.endpoint = endpoint; |
| 59 | return this; |
| 60 | } |
| 61 | |
| 62 | } |