| /* |
| * 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 <unordered_map> |
| #include <random> |
| #include <chrono> |
| #include <iomanip> |
| #include <sstream> |
| #include "openssl/evp.h" |
| #include "utils/NameUtils.h" |
| |
| std::string NameUtils::generateRandomAlphanumeric(int length) |
| { |
| std::random_device rd; |
| std::mt19937 gen(rd()); |
| std::uniform_int_distribution<> dis(0, 35); |
| std::string chars = "abcdefghijklmnopqrstuvwxyz0123456789"; |
| std::string result; |
| for (int i = 0; i < length; i++) |
| { |
| result += chars[dis(gen)]; |
| } |
| return result; |
| } |
| |
| std::string NameUtils::generateMD5Sum(const std::string &input) |
| { |
| unsigned char hash[MD5_DIGEST_LENGTH]; |
| unsigned int hash_length; |
| |
| const EVP_MD *sha256_md = EVP_sha256(); |
| EVP_MD_CTX *mdctx = EVP_MD_CTX_new(); |
| EVP_DigestInit_ex(mdctx, sha256_md, nullptr); |
| EVP_DigestUpdate(mdctx, reinterpret_cast<const unsigned char *>(input.c_str()), input.length()); |
| EVP_DigestFinal_ex(mdctx, hash, &hash_length); |
| EVP_MD_CTX_free(mdctx); |
| |
| std::stringstream ss; |
| for (unsigned int i = 0; i < hash_length; i++) |
| { |
| ss << std::hex << std::setw(2) << std::setfill('0') << static_cast<int>(hash[i]); |
| } |
| |
| return ss.str(); |
| } |
| |
| std::string NameUtils::getTopicName() |
| { |
| while (true) |
| { |
| std::string topic = "topic-server-" + generateRandomAlphanumeric(20); |
| std::lock_guard<std::mutex> lock(mtx); |
| auto it = alreadyUsed.find(topic); |
| if (it == alreadyUsed.end()) |
| { |
| alreadyUsed[topic] = topic; |
| return topic; |
| } |
| } |
| } |
| |
| std::string NameUtils::getGroupName() |
| { |
| while (true) |
| { |
| std::string gid = "GID-server-" + generateRandomAlphanumeric(20); |
| std::lock_guard<std::mutex> lock(mtx); |
| auto it = alreadyUsed.find(gid); |
| if (it == alreadyUsed.end()) |
| { |
| alreadyUsed[gid] = gid; |
| return gid; |
| } |
| } |
| } |
| |
| std::string NameUtils::getTagName() |
| { |
| while (true) |
| { |
| std::string tag = "tag-server-" + generateRandomAlphanumeric(20); |
| std::lock_guard<std::mutex> lock(mtx); |
| auto it = alreadyUsed.find(tag); |
| if (it == alreadyUsed.end()) |
| { |
| alreadyUsed[tag] = tag; |
| return tag; |
| } |
| } |
| } |
| |
| std::string NameUtils::getRandomTopicName() |
| { |
| while (true) |
| { |
| std::string topic = "topic-server-" + generateRandomAlphanumeric(20); |
| std::lock_guard<std::mutex> lock(mtx); |
| auto it = alreadyUsed.find(topic); |
| if (it == alreadyUsed.end()) |
| { |
| alreadyUsed[topic] = topic; |
| return topic; |
| } |
| } |
| } |
| |
| std::string NameUtils::getTopicName(const std::string &messageType, const std::string &className, const std::string &methodName) |
| { |
| while (true) |
| { |
| std::string topic = "topic-" + messageType + "-" + generateMD5Sum(className + methodName); |
| std::lock_guard<std::mutex> lock(mtx); |
| auto it = alreadyUsed.find(topic); |
| if (it == alreadyUsed.end()) |
| { |
| alreadyUsed[topic] = topic; |
| return topic; |
| } |
| } |
| } |
| |
| std::string NameUtils::getRandomTopicName(const std::string &suffix) |
| { |
| while (true) |
| { |
| std::string topic = "topic-" + generateRandomAlphanumeric(6) + "-" + suffix; |
| std::lock_guard<std::mutex> lock(mtx); |
| auto it = alreadyUsed.find(topic); |
| if (it == alreadyUsed.end()) |
| { |
| alreadyUsed[topic] = topic; |
| return topic; |
| } |
| } |
| } |
| |
| std::string NameUtils::getRandomGroupName() |
| { |
| while (true) |
| { |
| std::string gid = "GID-server-" + generateRandomAlphanumeric(20); |
| std::lock_guard<std::mutex> lock(mtx); |
| auto it = alreadyUsed.find(gid); |
| if (it == alreadyUsed.end()) |
| { |
| alreadyUsed[gid] = gid; |
| return gid; |
| } |
| } |
| } |
| |
| std::string NameUtils::getGroupName(const std::string &className, const std::string &methodName) |
| { |
| while (true) |
| { |
| std::string gid = "GID-" + generateMD5Sum(className + methodName); |
| std::lock_guard<std::mutex> lock(mtx); |
| auto it = alreadyUsed.find(gid); |
| if (it == alreadyUsed.end()) |
| { |
| alreadyUsed[gid] = gid; |
| return gid; |
| } |
| } |
| } |
| |
| std::string NameUtils::getRandomGroupName(const std::string &suffix) |
| { |
| while (true) |
| { |
| std::string gid = "GID-" + generateRandomAlphanumeric(6) + "-" + suffix; |
| std::lock_guard<std::mutex> lock(mtx); |
| auto it = alreadyUsed.find(gid); |
| if (it == alreadyUsed.end()) |
| { |
| alreadyUsed[gid] = gid; |
| return gid; |
| } |
| } |
| } |
| |
| std::string NameUtils::getRandomTagName() |
| { |
| while (true) |
| { |
| std::string tag = "tag-server-" + generateRandomAlphanumeric(20); |
| std::lock_guard<std::mutex> lock(mtx); |
| auto it = alreadyUsed.find(tag); |
| if (it == alreadyUsed.end()) |
| { |
| alreadyUsed[tag] = tag; |
| return tag; |
| } |
| } |
| } |