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 /*
  * 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.apache.shindig.gadgets.http;
import  com.google.inject.ImplementedBy;
Service implemented by the container to support content invalidation.
@ImplementedBy(DefaultInvalidationService.class)
public interface InvalidationService {

  
Header used to tag the content with its invalidation marker. Suppressed on output
  public static final String INVALIDATION_HEADER = "X-Shindig-Invalidation";

  
Invalidate a set of cached resources that are part of the application specification itself. This includes gadget specs, manifests and message bundles

Parameters:
uris of content to invalidate
token identifying the calling application
  void invalidateApplicationResources(Set<UriurisSecurityToken token);

  
Invalidate all cached resources where the specified user ids were used as either the owner or viewer id when a signed or OAuth request was made for the content by the application identified in the security token.

Parameters:
opensocialIds Set of user ids to invalidate authenticated/signed content for
token identifying the calling application
  void invalidateUserResources(Set<StringopensocialIdsSecurityToken token);

  
Is the specified HttpResponse still valid. If the request is signed or authenticated has its content been invalidated by a call to invalidateUserResource subsequent to the response being cached.
  boolean isValid(HttpRequest requestHttpResponse response);

  
Mark the HttpResponse prior to caching it so that subsequent calls to isValid can detect if it has been invalidated.
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