/*
* Change the headers with current fragment information:
* 1. X-GP-DATA-DIR header is changed to the source name of the current fragment.
* We reuse the same http header to send all requests for specific fragments.
* The original header's value contains the name of the general path of the query
* (can be with wildcard or just a directory name), and this value is changed here
* to the specific source name of each fragment name.
* 2. X-GP-FRAGMENT-USER-DATA header is changed to the current fragment's user data.
* If the fragment doesn't have user data, the header will be removed.
*/
void set_current_fragment_headers(gphadoop_context* context)
{
FragmentData* frag_data = (FragmentData*)lfirst(context->current_fragment);
elog(DEBUG2, "pxf: set_current_fragment_source_name: source_name %s, index %s, has user data: %s ",
frag_data->source_name, frag_data->index, frag_data->user_data ? "TRUE" : "FALSE");
churl_headers_override(context->churl_headers, "X-GP-DATA-DIR", frag_data->source_name);
churl_headers_override(context->churl_headers, "X-GP-DATA-FRAGMENT", frag_data->index);
churl_headers_override(context->churl_headers, "X-GP-FRAGMENT-METADATA", frag_data->fragment_md);
churl_headers_override(context->churl_headers, "X-GP-FRAGMENT-INDEX", frag_data->index);
if (frag_data->user_data)
{
churl_headers_override(context->churl_headers, "X-GP-FRAGMENT-USER-DATA", frag_data->user_data);
}
else
{
churl_headers_remove(context->churl_headers, "X-GP-FRAGMENT-USER-DATA", true);
}
if (frag_data->profile)
{
/* if current fragment has optimal profile set it*/
churl_headers_override(context->churl_headers, "X-GP-PROFILE", frag_data->profile);
elog(DEBUG2, "pxf: set_current_fragment_headers: using profile: %s", frag_data->profile);
} else if (context->gphd_uri->profile)
{
/* if current fragment doesn't have any optimal profile, set to use profile from url */
churl_headers_override(context->churl_headers, "X-GP-PROFILE", context->gphd_uri->profile);
elog(DEBUG2, "pxf: set_current_fragment_headers: using profile: %s", context->gphd_uri->profile);
}
/* if there is no profile passed in url, we expect to have accessor+fragmenter+resolver so no action needed by this point */
}
/*
* Change the headers with current fragment information:
* 1. X-GP-DATA-DIR header is changed to the source name of the current fragment.
* We reuse the same http header to send all requests for specific fragments.
* The original header's value contains the name of the general path of the query
* (can be with wildcard or just a directory name), and this value is changed here
* to the specific source name of each fragment name.
* 2. X-GP-FRAGMENT-USER-DATA header is changed to the current fragment's user data.
* If the fragment doesn't have user data, the header will be removed.
*/
void set_current_fragment_headers(gphadoop_context* context)
{
FragmentData* frag_data = (FragmentData*)lfirst(context->current_fragment);
elog(DEBUG2, "pxf: set_current_fragment_source_name: source_name %s, index %s, has user data: %s ",
frag_data->source_name, frag_data->index, frag_data->user_data ? "TRUE" : "FALSE");
churl_headers_override(context->churl_headers, "X-GP-DATA-DIR", frag_data->source_name);
churl_headers_override(context->churl_headers, "X-GP-DATA-FRAGMENT", frag_data->index);
churl_headers_override(context->churl_headers, "X-GP-FRAGMENT-METADATA", frag_data->fragment_md);
if (frag_data->user_data)
{
churl_headers_override(context->churl_headers, "X-GP-FRAGMENT-USER-DATA", frag_data->user_data);
}
else
{
churl_headers_remove(context->churl_headers, "X-GP-FRAGMENT-USER-DATA", true);
}
}
