| 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.openstack.filters; |
| 20 | |
| 21 | import java.util.Date; |
| 22 | |
| 23 | import javax.inject.Inject; |
| 24 | import javax.inject.Provider; |
| 25 | import javax.inject.Singleton; |
| 26 | import javax.ws.rs.core.UriBuilder; |
| 27 | |
| 28 | import org.jclouds.date.TimeStamp; |
| 29 | import org.jclouds.http.HttpException; |
| 30 | import org.jclouds.http.HttpRequest; |
| 31 | import org.jclouds.http.HttpRequestFilter; |
| 32 | import org.jclouds.http.utils.ModifyRequest; |
| 33 | |
| 34 | import com.google.common.base.Supplier; |
| 35 | |
| 36 | /** |
| 37 | * Adds a timestamp to the query line so that cache is invalidated. |
| 38 | * |
| 39 | * @author Mike Mayo |
| 40 | * |
| 41 | */ |
| 42 | @Singleton |
| 43 | public class AddTimestampQuery implements HttpRequestFilter { |
| 44 | private final Supplier<Date> dateProvider; |
| 45 | private final Provider<UriBuilder> builder; |
| 46 | |
| 47 | @Inject |
| 48 | public AddTimestampQuery(@TimeStamp Supplier<Date> dateProvider, Provider<UriBuilder> builder) { |
| 49 | this.builder = builder; |
| 50 | this.dateProvider = dateProvider; |
| 51 | } |
| 52 | |
| 53 | @Override |
| 54 | public HttpRequest filter(HttpRequest request) throws HttpException { |
| 55 | return ModifyRequest.addQueryParam(request, "now", dateProvider.get().getTime() + "", builder.get()); |
| 56 | } |
| 57 | |
| 58 | } |