odboy
7bf1dff3ce
核心功能： - JSON 解析：使用 cJSON 解析服务端返回的配置 - 配置缓存：自动保存到本地 .kenaito-config-cache.json 文件 - 定时同步：后台线程定时拉取配置变更（默认 10 秒） - 配置变更回调：配置变更时自动触发回调函数 - 全量/增量拉取：首次全量拉取，后续通过 lastTime 增量拉取 - 优雅退出：支持信号处理，Ctrl+C 优雅关闭 API： - config_client_init() - 初始化客户端 - config_client_start() - 启动客户端（全量拉取 + 后台同步） - config_client_get() - 获取配置值 - config_client_stop() - 停止客户端并保存缓存 依赖： - libcurl（HTTP 请求） - cJSON（JSON 解析） - pthread（后台同步线程） 编译： - SDK: gcc -c main.c -o kenaito_conf.o -lcurl -lcjson - Demo: gcc -o demo main.c ../kenaito-conf-c-client/main.c -lcurl -lcjson -lpthread
120 lines
3.6 KiB
C
120 lines
3.6 KiB
C
/**
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* Kenaito Config Center C Client Demo
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*
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* 演示如何使用 C 客户端 SDK：
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* - 初始化客户端
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* - 注册配置变更回调
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* - 启动/停止客户端
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* - 读取配置
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*
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* 编译：
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* gcc -o demo main.c -I../kenaito-conf-c-client -L../kenaito-conf-c-client -lkenaito_conf -lcurl -lcjson -lpthread
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*
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* 或直接编译所有源文件：
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* gcc -o demo main.c ../kenaito-conf-c-client/main.c -lcurl -lcjson -lpthread
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*
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* 运行：
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* ./demo
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <signal.h>
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#include "../kenaito-conf-c-client/main.c"
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/* 全局客户端实例，用于信号处理 */
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static ConfigClient *g_demo_client = NULL;
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/**
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* 配置变更回调示例
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*/
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void on_config_change(const char *key, const char *value) {
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printf("\n[Callback] Config changed: %s = %s\n", key, value);
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/* 示例：根据配置键执行不同操作 */
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if (strcmp(key, "log.level") == 0) {
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printf(" -> Log level changed to: %s\n", value);
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} else if (strcmp(key, "database.host") == 0) {
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printf(" -> Database host changed to: %s\n", value);
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/* 实际应用中可在此重新初始化数据库连接 */
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} else if (strcmp(key, "database.port") == 0) {
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printf(" -> Database port changed to: %s\n", value);
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} else if (strcmp(key, "feature.enabled") == 0) {
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printf(" -> Feature flag changed: %s\n", value);
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}
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}
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/**
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* 信号处理 - 优雅退出
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*/
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static void signal_handler(int sig) {
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printf("\n[Signal] Received signal %d, shutting down...\n", sig);
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if (g_demo_client) {
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g_demo_client->running = 0;
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}
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}
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int main() {
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printf("========================================\n");
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printf(" Kenaito Config Center C Client Demo\n");
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printf("========================================\n\n");
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/* 注册信号处理 */
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signal(SIGINT, signal_handler);
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signal(SIGTERM, signal_handler);
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/* 初始化 CURL */
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curl_global_init(CURL_GLOBAL_DEFAULT);
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/* 配置客户端 */
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Config config = {
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.baseUrl = "http://localhost:8080",
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.appName = "kenaito-springboot-demo",
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.env = "daily",
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.version = "latest",
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.token = "",
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.syncInterval = 10,
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.ignoreGlobal = 0,
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.cacheDir = "."
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};
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ConfigClient client;
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config_client_init(&client, &config);
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client.onChange = on_config_change;
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g_demo_client = &client;
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/* 启动客户端 */
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config_client_start(&client);
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/* 主循环：演示配置读取 */
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printf("\n[Demo] Running... Press Ctrl+C to stop\n\n");
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int iterations = 0;
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while (client.running && iterations < 10) {
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sleep(5);
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/* 演示：定期读取并打印配置 */
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const char *dbHost = config_client_get(&client, "database.host");
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const char *dbPort = config_client_get(&client, "database.port");
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const char *logLevel = config_client_get(&client, "log.level");
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const char *featureEnabled = config_client_get(&client, "feature.enabled");
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printf("\n[Current Configs @ %ld]\n", time(NULL));
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printf(" database.host = %s\n", dbHost ? dbHost : "(not set)");
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printf(" database.port = %s\n", dbPort ? dbPort : "(not set)");
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printf(" log.level = %s\n", logLevel ? logLevel : "(not set)");
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printf(" feature.enabled = %s\n", featureEnabled ? featureEnabled : "(not set)");
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printf(" Total configs: %d\n\n", client.configs.count);
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iterations++;
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}
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/* 停止客户端 */
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config_client_stop(&client);
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printf("\n[Demo] Finished\n");
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return 0;
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}
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