Class ConditionalRequestBuilder<T extends org.apache.hc.core5.http.HttpRequest>

java.lang.Object
org.apache.hc.client5.http.impl.cache.ConditionalRequestBuilder<T>

class ConditionalRequestBuilder<T extends org.apache.hc.core5.http.HttpRequest> extends Object
  • Field Details

    • messageCopier

      private final org.apache.hc.core5.function.Factory<T extends org.apache.hc.core5.http.HttpRequest,T extends org.apache.hc.core5.http.HttpRequest> messageCopier
  • Constructor Details

    • ConditionalRequestBuilder

      ConditionalRequestBuilder(org.apache.hc.core5.function.Factory<T,T> messageCopier)
  • Method Details

    • buildConditionalRequest

      public T buildConditionalRequest(T request, HttpCacheEntry cacheEntry)
      When a HttpCacheEntry is stale but 'might' be used as a response to an HttpRequest we will attempt to revalidate the entry with the origin. Build the origin HttpRequest here and return it.
      Parameters:
      request - the original request from the caller
      cacheEntry - the entry that needs to be re-validated
      Returns:
      the wrapped request
    • buildConditionalRequestFromVariants

      public T buildConditionalRequestFromVariants(T request, Map<String,Variant> variants)
      When a HttpCacheEntry does not exist for a specific HttpRequest we attempt to see if an existing HttpCacheEntry is appropriate by building a conditional HttpRequest using the variants' ETag values. If no such values exist, the request is unmodified
      Parameters:
      request - the original request from the caller
      variants -
      Returns:
      the wrapped request
    • buildUnconditionalRequest

      public T buildUnconditionalRequest(T request)
      Returns a request to unconditionally validate a cache entry with the origin. In certain cases (due to multiple intervening caches) our cache may actually receive a response to a normal conditional validation where the Date header is actually older than that of our current cache entry. In this case, the protocol recommendation is to retry the validation and force syncup with the origin.
      Parameters:
      request - client request we are trying to satisfy
      Returns:
      an unconditional validation request