| /* |
| * ==================================================================== |
| * 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| package org.apache.http.impl.client.cache; |
| |
| import java.util.concurrent.ExecutionException; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.http.HttpHost; |
| import org.apache.http.HttpResponse; |
| import org.apache.http.ProtocolException; |
| import org.apache.http.client.cache.HttpCacheContext; |
| import org.apache.http.client.cache.HttpCacheEntry; |
| import org.apache.http.client.methods.HttpRequestWrapper; |
| import org.apache.http.concurrent.BasicFuture; |
| import org.apache.http.concurrent.FutureCallback; |
| |
| /** |
| * Class used to represent an asynchronous revalidation event, such as with |
| * "stale-while-revalidate" |
| */ |
| class AsynchronousAsyncValidationRequest implements Runnable { |
| private final AsynchronousAsyncValidator parent; |
| private final CachingHttpAsyncClient cachingAsyncClient; |
| private final HttpHost target; |
| private final HttpRequestWrapper request; |
| private final HttpCacheContext clientContext; |
| private final HttpCacheEntry cacheEntry; |
| private final String identifier; |
| |
| private final Log log = LogFactory.getLog(getClass()); |
| |
| /** |
| * Used internally by {@link AsynchronousValidator} to schedule a |
| * revalidation. |
| */ |
| AsynchronousAsyncValidationRequest(final AsynchronousAsyncValidator parent, |
| final CachingHttpAsyncClient cachingClient, final HttpHost target, final HttpRequestWrapper request, |
| final HttpCacheContext clientContext, final HttpCacheEntry cacheEntry, final String identifier) { |
| this.parent = parent; |
| this.cachingAsyncClient = cachingClient; |
| this.target = target; |
| this.request = request; |
| this.clientContext = clientContext; |
| this.cacheEntry = cacheEntry; |
| this.identifier = identifier; |
| } |
| |
| @Override |
| public void run() { |
| try { |
| final FutureCallback<HttpResponse> callback = new FutureCallback<HttpResponse>() { |
| |
| @Override |
| public void cancelled() { |
| } |
| |
| @Override |
| public void completed(final HttpResponse httpResponse) { |
| } |
| |
| @Override |
| public void failed(final Exception e) { |
| log.debug("Asynchronous revalidation failed", e); |
| } |
| }; |
| final BasicFuture<HttpResponse> future = new BasicFuture<HttpResponse>(callback); |
| this.cachingAsyncClient.revalidateCacheEntry(future, this.target, this.request, |
| this.clientContext, this.cacheEntry); |
| future.get(); |
| } catch (final ProtocolException pe) { |
| this.log.error("ProtocolException thrown during asynchronous revalidation", pe); |
| } catch (ExecutionException e) { |
| this.log.error("Exception thrown during asynchronous revalidation", e.getCause()); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| } finally { |
| this.parent.markComplete(this.identifier); |
| } |
| } |
| |
| String getIdentifier() { |
| return this.identifier; |
| } |
| |
| } |