Method finalize

plugins/cachekey/cachekey.cc:745–811

* @brief Update cache key. * @return true if success, false if failed to set the cache key. */

 * @return true if success, false if failed to set the cache key.
 */
bool
CacheKey::finalize() const
{
  bool   res = false;
  String msg;

  CacheKeyDebug("finalizing %s '%s' from a %s plugin", getCacheKeyKeyTypeName(_keyType), _key.c_str(),
                (_remap ? "remap" : "global"));
  switch (_keyType) {
  case CACHE_KEY: {
    if (TS_SUCCESS == TSCacheUrlSet(_txn, &(_key[0]), _key.size())) {
      /* Set cache key successfully */
      msg.assign("set cache key to ").append(_key);
      res = true;
    } else {
      if (_remap) {
        /* Remap instance. Always runs first by design (before TS_HTTP_POST_REMAP_HOOK) */
        msg.assign("failed to set cache key");
      } else {
        /* Global instance. We would fail and get here if a per-remap instance has already set the cache key
         * (currently TSCacheUrlSet() can be called only once successfully). Don't error, just debug.
         * @todo avoid the consecutive attempts and error only on unexpected failures. */
        msg.assign("failed to set cache key");
      }
    }
  } break;
  case PARENT_SELECTION_URL: {
    /* parent selection */
    const char *start = _key.c_str();
    const char *end   = _key.c_str() + _key.length();
    TSMLoc      new_url_loc;
    if (TS_SUCCESS == TSUrlCreate(_buf, &new_url_loc)) {
      if (TS_PARSE_DONE == TSUrlParse(_buf, new_url_loc, &start, end)) {
        if (TS_SUCCESS == TSHttpTxnParentSelectionUrlSet(_txn, _buf, new_url_loc)) {
          msg.assign("set parent selection URL to ").append(_key);
          res = true;
        } else {
          msg.assign("failed to set parent selection URL");
        }
      } else {
        msg.assign("failed to parse parent selection URL");
      }
      TSHandleMLocRelease(_buf, TS_NULL_MLOC, new_url_loc);
    } else {
      msg.assign("failed to create parent selection URL");
    }
  } break;
  default: {
    msg.assign("unknown target URI type");
  } break;
  }

  /* Report status - debug level in case of success, error in case of failure.
   * Since getting effective URI is expensive add it only in case of failure */
  if (res) {
    CacheKeyDebug("%.*s", static_cast<int>(msg.length()), msg.c_str());
  } else {
    int   len;