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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "searchview.h"
#include <vespa/searchcore/proton/docsummary/docsumcontext.h>
#include <vespa/searchlib/engine/searchreply.h>
#include <vespa/log/log.h>
LOG_SETUP(".proton.server.searchview");
using proton::matching::MatchContext;
using search::AttributeGuard;
using search::AttributeVector;
using search::attribute::IAttributeContext;
using search::docsummary::IDocsumStore;
using search::docsummary::ResultConfig;
using search::engine::DocsumReply;
using search::engine::DocsumRequest;
using search::engine::SearchReply;
using vespalib::ThreadBundle;
namespace proton {
using matching::ISearchContext;
using matching::Matcher;
namespace {
/**
* Maps the gids in the request to lids using the given document meta store.
* A reader guard must be taken before calling this function.
**/
void
convertGidsToLids(const DocsumRequest & request,
const search::IDocumentMetaStore &metaStore,
uint32_t docIdLimit)
{
document::GlobalId empty;
uint32_t lid = 0;
for (size_t i = 0; i < request.hits.size(); ++i) {
const DocsumRequest::Hit & h = request.hits[i];
if (metaStore.getLid(h.gid, lid) && lid < docIdLimit) {
h.docid = lid;
} else {
h.docid = search::endDocId;
LOG(debug, "Document with global id '%s' is not in the document db, will return empty docsum", h.gid.toString().c_str());
}
LOG(spam, "convertGidToLid(DocsumRequest): hit[%zu]: gid(%s) -> lid(%u)", i, h.gid.toString().c_str(), h.docid);
}
}
bool
requestHasLidAbove(const DocsumRequest & request, uint32_t docIdLimit)
{
for (const DocsumRequest::Hit & h : request.hits) {
if (h.docid >= docIdLimit) {
return true;
}
}
return false;
}
bool
hasAnyLidsMoved(const DocsumRequest & request,
const search::IDocumentMetaStore &metaStore)
{
for (const DocsumRequest::Hit & h : request.hits) {
uint32_t lid = 0;
if (h.docid != search::endDocId) {
if (!metaStore.getLid(h.gid, lid) || (lid != h.docid)) {
LOG(debug, "lid = %d moved to %d", h.docid, lid);
return true;
}
}
}
return false;
}
/**
* Maps the lids in the reply to gids using the original request.
**/
void
convertLidsToGids(DocsumReply &reply, const DocsumRequest &request)
{
LOG_ASSERT(reply.docsums.size() == request.hits.size());
for (size_t i = 0; i < reply.docsums.size(); ++i) {
const DocsumRequest::Hit & h = request.hits[i];
DocsumReply::Docsum & d = reply.docsums[i];
d.gid = h.gid;
LOG(spam, "convertLidToGid(DocsumReply): docsum[%zu]: lid(%u) -> gid(%s)", i, d.docid, d.gid.toString().c_str());
}
}
/**
* Create empty docsum reply
**/
DocsumReply::UP
createEmptyReply(const DocsumRequest & request)
{
auto reply = std::make_unique<DocsumReply>();
for (size_t i = 0; i < request.hits.size(); ++i) {
reply->docsums.push_back(DocsumReply::Docsum());
reply->docsums.back().gid = request.hits[i].gid;
}
return reply;
}
}
SearchView::SearchView(const ISummaryManager::ISummarySetup::SP & summarySetup,
const MatchView::SP & matchView)
: ISearchHandler(),
_summarySetup(summarySetup),
_matchView(matchView)
{ }
SearchView::~SearchView() = default;
DocsumReply::UP
SearchView::getDocsums(const DocsumRequest & req)
{
LOG(spam, "getDocsums(): resultClass(%s), numHits(%zu)", req.resultClassName.c_str(), req.hits.size());
if (_summarySetup->getResultConfig(). LookupResultClassId(req.resultClassName.c_str()) == ResultConfig::NoClassID()) {
LOG(warning, "There is no summary class with name '%s' in the summary config. Returning empty document summary for %zu hit(s)",
req.resultClassName.c_str(), req.hits.size());
return createEmptyReply(req);
}
SearchView::InternalDocsumReply reply = getDocsumsInternal(req);
while ( ! reply.second ) {
LOG(debug, "Must refetch docsums since the lids have moved.");
reply = getDocsumsInternal(req);
}
if ( ! req.useRootSlime()) {
convertLidsToGids(*reply.first, req);
}
return std::move(reply.first);
}
SearchView::InternalDocsumReply
SearchView::getDocsumsInternal(const DocsumRequest & req)
{
IDocumentMetaStoreContext::IReadGuard::UP readGuard = _matchView->getDocumentMetaStore()->getReadGuard();
const search::IDocumentMetaStore & metaStore = readGuard->get();
uint32_t numUsedLids = metaStore.getNumUsedLids();
uint64_t startGeneration = readGuard->get().getCurrentGeneration();
convertGidsToLids(req, metaStore, _matchView->getDocIdLimit().get());
IDocsumStore::UP store(_summarySetup->createDocsumStore(req.resultClassName));
MatchContext::UP mctx = _matchView->createContext();
auto ctx = std::make_unique<DocsumContext>(req, _summarySetup->getDocsumWriter(), *store, _matchView->getMatcher(req.ranking),
mctx->getSearchContext(), mctx->getAttributeContext(),
*_summarySetup->getAttributeManager(), *getSessionManager());
SearchView::InternalDocsumReply reply(ctx->getDocsums(), true);
uint64_t endGeneration = readGuard->get().getCurrentGeneration();
if (startGeneration != endGeneration) {
if (requestHasLidAbove(req, std::min(numUsedLids, metaStore.getNumUsedLids()))) {
if (hasAnyLidsMoved(req, metaStore)) {
reply.second = false;
}
}
}
return reply;
}
std::unique_ptr<SearchReply>
SearchView::match(const ISearchHandler::SP &self, const SearchRequest &req, ThreadBundle &threadBundle) const {
return _matchView->match(self, req, threadBundle);
}
} // namespace proton
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