query.cpp

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
 
#include "platform/consensus/ordering/pbft/query.h"
 
#include <glog/logging.h>
#include <unistd.h>
 
namespace resdb {
 
Query::Query(const ResDBConfig& config, MessageManager* message_manager,
             std::unique_ptr<CustomQuery> executor)
    : config_(config),
      message_manager_(message_manager),
      custom_query_executor_(std::move(executor)) {}
 
Query::~Query() {}
 
int Query::ProcessGetReplicaState(std::unique_ptr<Context> context,
                                  std::unique_ptr<Request> request) {
  ReplicaState replica_state;
  int ret = message_manager_->GetReplicaState(&replica_state);
  if (ret == 0) {
    if (context != nullptr && context->client != nullptr) {
      ret = context->client->SendRawMessage(replica_state);
      if (ret) {
        LOG(ERROR) << "send resp" << replica_state.DebugString()
                   << " fail ret:" << ret;
      }
    }
  }
  return ret;
}
 
int Query::ProcessQuery(std::unique_ptr<Context> context,
                        std::unique_ptr<Request> request) {
  QueryRequest query;
  if (!query.ParseFromString(request->data())) {
    LOG(ERROR) << "parse data fail";
    return -2;
  }
  // LOG(ERROR) << "request:" << query.DebugString();
 
  QueryResponse response;
  for (uint64_t i = query.min_seq(); i <= query.max_seq(); ++i) {
    Request* ret_request = message_manager_->GetRequest(i);
    if (ret_request == nullptr) {
      break;
    }
    Request* txn = response.add_transactions();
    txn->set_data(ret_request->data());
    txn->set_hash(ret_request->hash());
    txn->set_seq(ret_request->seq());
    txn->set_proxy_id(ret_request->proxy_id());
  }
 
  if (context != nullptr && context->client != nullptr) {
    // LOG(ERROR) << "send response:" << response.DebugString();
    int ret = context->client->SendRawMessage(response);
    if (ret) {
      LOG(ERROR) << "send resp fail ret:" << ret;
    }
  }
  return 0;
}
 
int Query::ProcessCustomQuery(std::unique_ptr<Context> context,
                              std::unique_ptr<Request> request) {
  if (custom_query_executor_ == nullptr) {
    LOG(ERROR) << "no custom executor";
    return -1;
  }
 
  std::unique_ptr<std::string> resp_str =
      custom_query_executor_->Query(request->data());
 
  CustomQueryResponse response;
  if (resp_str != nullptr) {
    response.set_resp_str(*resp_str);
  }
 
  if (context != nullptr && context->client != nullptr) {
    int ret = context->client->SendRawMessage(response);
    if (ret) {
      LOG(ERROR) << "send resp fail ret:" << ret;
    }
  }
  return 0;
}
 
}  // namespace resdb