Examples of org.apache.http.impl.client.cache.CachingHttpClient$AsynchronousValidator

Package org.apache.http.impl.client.cache

Examples of org.apache.http.impl.client.cache.CachingHttpClient$AsynchronousValidator

org.apache.http.impl.client.cache.CachingHttpClient
kipedia.org/wiki/Decorator_pattern">Decorator of the backend client; for any incoming request it attempts to satisfy it from the cache, but if it can't, or if it needs to revalidate a stale cache entry, it will use the backend client to make an actual request. However, a proper HTTP/1.1 cache won't change the semantics of a request and response; in particular, if you issue an unconditional request you will get a full response (although it may be served to you from the cache, or the cache may make a conditional request on your behalf to the origin). This notion of "semantic transparency" means you should be able to drop a {@link CachingHttpClient} into an existing application without breakinganything.

Folks that would like to experiment with alternative storage backends should look at the {@link HttpCacheStorage} interface and the relatedpackage documentation there. You may also be interested in the provided {@link org.apache.http.impl.client.cache.ehcache.EhcacheHttpCacheStorage EhCache} and {@link org.apache.http.impl.client.cache.memcached.MemcachedHttpCacheStorage memcached} storage backends.
@since 4.1 @deprecated (4.3) use {@link CachingHttpClientBuilder} or {@link CachingHttpClients}.

                    client.addResponseInterceptor(new ResponseContentEncoding());
                    final CacheConfig cacheConfig = new CacheConfig();
                    cacheConfig.setMaxObjectSize(1024 * 128); // 128 kB
                    cacheConfig.setMaxCacheEntries(1000);
                    // and allow caching
                    httpClient = new CachingHttpClient(client, cacheConfig);
                }
            }
        }
        return httpClient;
    }

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        final URL url = new URL("http://json-ld.org/contexts/person.jsonld");
        DocumentLoader.fromURL(url);


        // Now try to get it again and ensure it is
        // cached
        final HttpClient client = new CachingHttpClient(DocumentLoader.getHttpClient());
        final HttpUriRequest get = new HttpGet(url.toURI());
        get.setHeader("Accept", DocumentLoader.ACCEPT_HEADER);
        final HttpContext localContext = new BasicHttpContext();
        final HttpResponse respo = client.execute(get, localContext);
        EntityUtils.consume(respo.getEntity());


        // Check cache status
        // http://hc.apache.org/httpcomponents-client-ga/tutorial/html/caching.html
        final CacheResponseStatus responseStatus = (CacheResponseStatus) localContext

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                    client.addResponseInterceptor(new ResponseContentEncoding());
                    final CacheConfig cacheConfig = new CacheConfig();
                    cacheConfig.setMaxObjectSize(1024 * 128); // 128 kB
                    cacheConfig.setMaxCacheEntries(1000);
                    // and allow caching
                    httpClient = new CachingHttpClient(client, cacheConfig);
                }
            }
        }
        return httpClient;
    }

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