C++ VPackBuilder::openObject方法代码示例

void arangodb::traverser::TraverserOptions::toVelocyPackIndexes(VPackBuilder& builder) const {
  VPackObjectBuilder guard(&builder);

  // base indexes
  builder.add("base", VPackValue(VPackValueType::Array));
  for (auto const& it : _baseLookupInfos) {
    for (auto const& it2 : it.idxHandles) {
      builder.openObject();
      it2.getIndex()->toVelocyPack(builder, false);
      builder.close();
    }
  }
  builder.close();
  
  // depth lookup indexes
  builder.add("levels", VPackValue(VPackValueType::Object));
  for (auto const& it : _depthLookupInfo) {
    builder.add(VPackValue(std::to_string(it.first)));
    builder.add(VPackValue(VPackValueType::Array));
    for (auto const& it2 : it.second) {
      for (auto const& it3 : it2.idxHandles) {
        builder.openObject();
        it3.getIndex()->toVelocyPack(builder, false);
        builder.close();
      }
    }
    builder.close();
  }
  builder.close();
}

/// @brief initializeCursor, could be called multiple times
int RemoteBlock::initializeCursor(AqlItemBlock* items, size_t pos) {
  DEBUG_BEGIN_BLOCK();
  // For every call we simply forward via HTTP

  if (!_isResponsibleForInitializeCursor) {
    // do nothing...
    return TRI_ERROR_NO_ERROR;
  }

  VPackBuilder builder;
  builder.openObject();

  if (items == nullptr) {
    // first call, items is still a nullptr
    builder.add("exhausted", VPackValue(true));
    builder.add("error", VPackValue(false));
  } else {
    builder.add("exhausted", VPackValue(false));
    builder.add("error", VPackValue(false));
    builder.add("pos", VPackValue(pos));
    builder.add(VPackValue("items"));
    builder.openObject();
    items->toVelocyPack(_engine->getQuery()->trx(), builder);
    builder.close();
  }

  builder.close();

  std::string bodyString(builder.slice().toJson());

  std::unique_ptr<ClusterCommResult> res = sendRequest(
      rest::RequestType::PUT, "/_api/aql/initializeCursor/", bodyString);
  throwExceptionAfterBadSyncRequest(res.get(), false);

  // If we get here, then res->result is the response which will be
  // a serialized AqlItemBlock:
  StringBuffer const& responseBodyBuf(res->result->getBody());
  {
    std::shared_ptr<VPackBuilder> builder = VPackParser::fromJson(
        responseBodyBuf.c_str(), responseBodyBuf.length());

    VPackSlice slice = builder->slice();

    if (slice.hasKey("code")) {
      return slice.get("code").getNumericValue<int>();
    }
    return TRI_ERROR_INTERNAL;
  }

  // cppcheck-suppress style
  DEBUG_END_BLOCK();
}

int Syncer::createCollection(VPackSlice const& slice, arangodb::LogicalCollection** dst) {
  if (dst != nullptr) {
    *dst = nullptr;
  }

  if (!slice.isObject()) {
    return TRI_ERROR_REPLICATION_INVALID_RESPONSE;
  }

  std::string const name = VelocyPackHelper::getStringValue(slice, "name", "");

  if (name.empty()) {
    return TRI_ERROR_REPLICATION_INVALID_RESPONSE;
  }

  TRI_voc_cid_t const cid = getCid(slice);

  if (cid == 0) {
    return TRI_ERROR_REPLICATION_INVALID_RESPONSE;
  }

  TRI_col_type_e const type = static_cast<TRI_col_type_e>(VelocyPackHelper::getNumericValue<int>(
      slice, "type", TRI_COL_TYPE_DOCUMENT));

  arangodb::LogicalCollection* col = getCollectionByIdOrName(cid, name);

  if (col != nullptr && col->type() == type) {
    // collection already exists. TODO: compare attributes
    return TRI_ERROR_NO_ERROR;
  }

  // merge in "isSystem" attribute
  VPackBuilder s;
  s.openObject();
  s.add("isSystem", VPackValue(true));
  s.close();

  VPackBuilder merged = VPackCollection::merge(s.slice(), slice, true);

  int res = TRI_ERROR_NO_ERROR;
  try {
    col = _vocbase->createCollection(merged.slice(), cid, true);
  } catch (basics::Exception const& ex) {
    res = ex.code();
  } catch (...) {
    res = TRI_ERROR_INTERNAL;
  }

  if (res != TRI_ERROR_NO_ERROR) {
    return res;
  }

  TRI_ASSERT(col != nullptr);

  if (dst != nullptr) {
    *dst = col;
  }

  return TRI_ERROR_NO_ERROR;
}

void RestWalHandler::transactions() {
  auto const& info =
      arangodb::wal::LogfileManager::instance()->runningTransactions();
 
  VPackBuilder builder;
  builder.openObject();
  builder.add("runningTransactions", VPackValue(static_cast<double>(std::get<0>(info))));

  // lastCollectedId
  {
    auto value = std::get<1>(info);
    if (value == UINT64_MAX) {
      builder.add("minLastCollected", VPackValue(VPackValueType::Null));
    } else {
      builder.add("minLastCollected", VPackValue(value));
    }
  }

  // lastSealedId
  {
    auto value = std::get<2>(info);
    if (value == UINT64_MAX) {
      builder.add("minLastSealed", VPackValue(VPackValueType::Null));
    } else {
      builder.add("minLastSealed", VPackValue(value));
    }
  }

  builder.close();

  generateResult(rest::ResponseCode::OK, builder.slice());
}

void arangodb::traverser::TraverserOptions::LookupInfo::buildEngineInfo(
    VPackBuilder& result) const {
  result.openObject();
  result.add(VPackValue("handle"));
  // We only run toVelocyPack on Coordinator.
  TRI_ASSERT(idxHandles.size() == 1);
  result.openObject();
  idxHandles[0].toVelocyPack(result, false);
  result.close();
  result.add(VPackValue("expression"));
  result.openObject(); // We need to encapsulate the expression into an expression object
  result.add(VPackValue("expression"));
  expression->toVelocyPack(result, true);
  result.close();
  result.add(VPackValue("condition"));
  indexCondition->toVelocyPack(result, true);
  result.add("condNeedUpdate", VPackValue(conditionNeedUpdate));
  result.add("condMemberToUpdate", VPackValue(conditionMemberToUpdate));
  result.close();
}

void RestVocbaseBaseHandler::generatePreconditionFailed(
    std::string const& collectionName, std::string const& key,
    TRI_voc_rid_t rev) {
  VPackBuilder builder;
  builder.openObject();
  builder.add(StaticStrings::IdString,
              VPackValue(assembleDocumentId(collectionName, key, false)));
  builder.add(StaticStrings::KeyString, VPackValue(key));
  builder.add(StaticStrings::RevString, VPackValue(std::to_string(rev)));
  builder.close();

  generatePreconditionFailed(builder.slice());
}

void TraverserExpression::toVelocyPack(VPackBuilder& builder) const {
  builder.openObject();
  builder.add("isEdgeAccess", VPackValue(isEdgeAccess));
  builder.add("comparisonType",
              VPackValue(static_cast<int32_t>(comparisonType)));
  
  builder.add(VPackValue("varAccess"));
  varAccess->toVelocyPack(builder, true);
  if (compareTo != nullptr) {
    builder.add("compareTo", compareTo->slice());
  }
  builder.close();
}

void SingleServerTraversalPath::pathToVelocyPack(arangodb::Transaction* trx,
                                                 VPackBuilder& result) {
  result.openObject();
  result.add(VPackValue("edges"));
  result.openArray();
  for (auto const& it : _path.edges) {
    auto cached = _traverser->_edges.find(it);
    // All edges are cached!!
    TRI_ASSERT(cached != _traverser->_edges.end());
    result.addExternal((*cached).second);
  }
  result.close();
  result.add(VPackValue("vertices"));
  result.openArray();
  for (auto const& it : _path.vertices) {
    result.add(_traverser->fetchVertexData(it).slice());
  }
  result.close();
  result.close();
}

RestStatus RestAqlFunctionsHandler::execute() {
  // extract the sub-request type
  auto const type = _request->requestType();

  if (type == rest::RequestType::GET) {
    VPackBuilder builder;

    builder.openObject();
    builder.add(VPackValue("functions"));
    aql::FunctionDefinitions::toVelocyPack(builder);
    builder.close();

    generateResult(rest::ResponseCode::OK, builder.slice());
    return RestStatus::DONE;
  }

  generateError(rest::ResponseCode::METHOD_NOT_ALLOWED,
                TRI_ERROR_HTTP_METHOD_NOT_ALLOWED);
  return RestStatus::DONE;
}

/// @brief getSome
AqlItemBlock* RemoteBlock::getSome(size_t atLeast, size_t atMost) {
  DEBUG_BEGIN_BLOCK();
  // For every call we simply forward via HTTP
  
  traceGetSomeBegin();

  VPackBuilder builder;
  builder.openObject();
  builder.add("atLeast", VPackValue(atLeast));
  builder.add("atMost", VPackValue(atMost));
  builder.close();

  std::string bodyString(builder.slice().toJson());

  std::unique_ptr<ClusterCommResult> res =
      sendRequest(rest::RequestType::PUT, "/_api/aql/getSome/", bodyString);
  throwExceptionAfterBadSyncRequest(res.get(), false);

  // If we get here, then res->result is the response which will be
  // a serialized AqlItemBlock:
  std::shared_ptr<VPackBuilder> responseBodyBuilder =
      res->result->getBodyVelocyPack();
  VPackSlice responseBody = responseBodyBuilder->slice();

  ExecutionStats newStats(responseBody.get("stats"));

  _engine->_stats.addDelta(_deltaStats, newStats);
  _deltaStats = newStats;

  if (VelocyPackHelper::getBooleanValue(responseBody, "exhausted", true)) {
    traceGetSomeEnd(nullptr);
    return nullptr;
  }

  auto r = new arangodb::aql::AqlItemBlock(responseBody);
  traceGetSomeEnd(r);
  return r;

  // cppcheck-suppress style
  DEBUG_END_BLOCK();
}

void RestVocbaseBaseHandler::generateSaved(
    arangodb::OperationResult const& result, std::string const& collectionName,
    TRI_col_type_e type, VPackOptions const* options, bool isMultiple) {
  if (result.wasSynchronous) {
    createResponse(GeneralResponse::ResponseCode::CREATED);
  } else {
    createResponse(GeneralResponse::ResponseCode::ACCEPTED);
  }

  if (isMultiple && !result.countErrorCodes.empty()) {
    VPackBuilder errorBuilder;
    errorBuilder.openObject();
    for (auto const& it : result.countErrorCodes) {
      errorBuilder.add(basics::StringUtils::itoa(it.first),
                       VPackValue(it.second));
    }
    errorBuilder.close();
    _response->setHeaderNC(StaticStrings::ErrorCodes, errorBuilder.toJson());
  }

  generate20x(result, collectionName, type, options);
}

static void JS_VersionClient(v8::FunctionCallbackInfo<v8::Value> const& args) {
  TRI_V8_TRY_CATCH_BEGIN(isolate);
  v8::HandleScope scope(isolate);

  bool details = false;
  if (args.Length() > 0) {
    details = TRI_ObjectToBoolean(args[0]);
  }

  if (!details) {
    // return version string
    TRI_V8_RETURN(TRI_V8_ASCII_STRING(ARANGODB_VERSION));
  }

  // return version details
  VPackBuilder builder;
  builder.openObject();
  rest::Version::getVPack(builder);
  builder.close();

  TRI_V8_RETURN(TRI_VPackToV8(isolate, builder.slice()));
  TRI_V8_TRY_CATCH_END
}

/// @brief skipSome
size_t RemoteBlock::skipSome(size_t atLeast, size_t atMost) {
  DEBUG_BEGIN_BLOCK();
  // For every call we simply forward via HTTP

  VPackBuilder builder;
  builder.openObject();
  builder.add("atLeast", VPackValue(atLeast));
  builder.add("atMost", VPackValue(atMost));
  builder.close();

  std::string bodyString(builder.slice().toJson());

  std::unique_ptr<ClusterCommResult> res =
      sendRequest(rest::RequestType::PUT, "/_api/aql/skipSome/", bodyString);
  throwExceptionAfterBadSyncRequest(res.get(), false);

  // If we get here, then res->result is the response which will be
  // a serialized AqlItemBlock:
  StringBuffer const& responseBodyBuf(res->result->getBody());
  {
    std::shared_ptr<VPackBuilder> builder = VPackParser::fromJson(
        responseBodyBuf.c_str(), responseBodyBuf.length());
    VPackSlice slice = builder->slice();

    if (!slice.hasKey("error") || slice.get("error").getBoolean()) {
      THROW_ARANGO_EXCEPTION(TRI_ERROR_CLUSTER_AQL_COMMUNICATION);
    }
    size_t skipped = 0;
    if (slice.hasKey("skipped")) {
      skipped = slice.get("skipped").getNumericValue<size_t>();
    }
    return skipped;
  }

  // cppcheck-suppress style
  DEBUG_END_BLOCK();
}

// read in- or outbound edges
bool RestEdgesHandler::readEdges(
    std::vector<traverser::TraverserExpression*> const& expressions) {
  std::vector<std::string> const& suffix = _request->suffix();

  if (suffix.size() != 1) {
    generateError(rest::ResponseCode::BAD,
                  TRI_ERROR_HTTP_BAD_PARAMETER,
                  "expected GET " + EDGES_PATH +
                      "/<collection-identifier>?vertex=<vertex-handle>&"
                      "direction=<direction>");
    return false;
  }

  std::string collectionName = suffix[0];
  CollectionNameResolver resolver(_vocbase);
  TRI_col_type_e colType = resolver.getCollectionTypeCluster(collectionName);
  if (colType == TRI_COL_TYPE_UNKNOWN) {
    generateError(rest::ResponseCode::NOT_FOUND,
                  TRI_ERROR_ARANGO_COLLECTION_NOT_FOUND);
    return false;
  }

  if (colType != TRI_COL_TYPE_EDGE) {
    generateError(rest::ResponseCode::BAD,
                  TRI_ERROR_ARANGO_COLLECTION_TYPE_INVALID);
    return false;
  }

  bool found;
  std::string dir = _request->value("direction", found);

  if (!found || dir.empty()) {
    dir = "any";
  }

  std::string dirString(dir);
  TRI_edge_direction_e direction;

  if (dirString == "any") {
    direction = TRI_EDGE_ANY;
  } else if (dirString == "out" || dirString == "outbound") {
    direction = TRI_EDGE_OUT;
  } else if (dirString == "in" || dirString == "inbound") {
    direction = TRI_EDGE_IN;
  } else {
    generateError(rest::ResponseCode::BAD,
                  TRI_ERROR_HTTP_BAD_PARAMETER,
                  "<direction> must by any, in, or out, not: " + dirString);
    return false;
  }

  std::string const& startVertex = _request->value("vertex", found);

  if (!found || startVertex.empty()) {
    generateError(rest::ResponseCode::BAD,
                  TRI_ERROR_ARANGO_DOCUMENT_HANDLE_BAD,
                  "illegal document handle");
    return false;
  }

  if (ServerState::instance()->isCoordinator()) {
    std::string vertexString(startVertex);
    rest::ResponseCode responseCode;
    VPackBuilder resultDocument;
    resultDocument.openObject();

    int res = getFilteredEdgesOnCoordinator(
        _vocbase->name(), collectionName, vertexString, direction, expressions,
        responseCode, resultDocument);
    if (res != TRI_ERROR_NO_ERROR) {
      generateError(responseCode, res);
      return false;
    }

    resultDocument.add("error", VPackValue(false));
    resultDocument.add("code", VPackValue(200));
    resultDocument.close();

    generateResult(rest::ResponseCode::OK, resultDocument.slice());

    return true;
  }

  // find and load collection given by name or identifier
  SingleCollectionTransaction trx(
      StandaloneTransactionContext::Create(_vocbase), collectionName,
      TRI_TRANSACTION_READ);

  // .............................................................................
  // inside read transaction
  // .............................................................................

  int res = trx.begin();
  if (res != TRI_ERROR_NO_ERROR) {
    generateTransactionError(collectionName, res, "");
    return false;
  }

  size_t filtered = 0;
//.........这里部分代码省略.........

void RestWalHandler::properties() {
  auto l = arangodb::wal::LogfileManager::instance();

  if (_request->requestType() == rest::RequestType::PUT) {
    std::shared_ptr<VPackBuilder> parsedRequest;
    VPackSlice slice;
    try {
      slice = _request->payload();
    } catch (...) {
      generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
                    "invalid body value. expecting object");
      return;
    }
    if (!slice.isObject()) {
      generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
                    "invalid body value. expecting object");
    }

    if (slice.hasKey("allowOversizeEntries")) {
      bool value = slice.get("allowOversizeEntries").getBoolean();
      l->allowOversizeEntries(value);
    }
    
    if (slice.hasKey("logfileSize")) {
      uint32_t value = slice.get("logfileSize").getNumericValue<uint32_t>();
      l->filesize(value);
    }
    
    if (slice.hasKey("historicLogfiles")) {
      uint32_t value = slice.get("historicLogfiles").getNumericValue<uint32_t>();
      l->historicLogfiles(value);
    }
    
    if (slice.hasKey("reserveLogfiles")) {
      uint32_t value = slice.get("reserveLogfiles").getNumericValue<uint32_t>();
      l->reserveLogfiles(value);
    }
    
    if (slice.hasKey("throttleWait")) {
      uint64_t value = slice.get("throttleWait").getNumericValue<uint64_t>();
      l->maxThrottleWait(value);
    }
    
    if (slice.hasKey("throttleWhenPending")) {
      uint64_t value = slice.get("throttleWhenPending").getNumericValue<uint64_t>();
      l->throttleWhenPending(value);
    }
  }

  VPackBuilder builder;
  builder.openObject();
  builder.add("allowOversizeEntries", VPackValue(l->allowOversizeEntries()));
  builder.add("logfileSize", VPackValue(l->filesize()));
  builder.add("historicLogfiles", VPackValue(l->historicLogfiles()));
  builder.add("reserveLogfiles", VPackValue(l->reserveLogfiles()));
  builder.add("syncInterval", VPackValue(l->syncInterval()));
  builder.add("throttleWait", VPackValue(l->maxThrottleWait()));
  builder.add("throttleWhenPending", VPackValue(l->throttleWhenPending()));

  builder.close();
  generateResult(rest::ResponseCode::OK, builder.slice());
}