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#include "bus_server_socket.h"
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#include "shm_mod_socket.h"
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#include "bus_error.h"
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static Logger *logger = LoggerFactory::getLogger();
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void BusServerSocket::foreach_subscripters(std::function<void(SHMKeySet *, int)> cb) {
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SHMTopicSubMap *topic_sub_map = mem_pool_attach<SHMTopicSubMap>(BUS_MAP_KEY);
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SHMKeySet *subscripter_set;
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SHMKeySet::iterator set_iter;
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SHMTopicSubMap::iterator map_iter;
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if(topic_sub_map != NULL) {
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for (map_iter = topic_sub_map->begin(); map_iter != topic_sub_map->end(); map_iter++) {
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subscripter_set = map_iter->second;
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if(subscripter_set != NULL) {
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for(set_iter = subscripter_set->begin(); set_iter != subscripter_set->end(); set_iter++) {
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cb(subscripter_set, *set_iter);
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}
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}
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}
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}
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}
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// bool BusServerSocket::include_in_keys(int key, int keys[], size_t length) {
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// if(length == 0) {
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// return false;
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// }
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// for(int i = 0; i < length; i++) {
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// if(keys[i] == key)
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// return true;
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// }
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// return false;
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// }
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size_t BusServerSocket::remove_subscripters(int keys[], size_t length) {
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size_t count = 0;
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int key;
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for(int i = 0; i < length; i++) {
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key = keys[i];
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SHMTopicSubMap *topic_sub_map = mem_pool_attach<SHMTopicSubMap>(BUS_MAP_KEY);
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SHMKeySet *subscripter_set;
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SHMKeySet::iterator set_iter;
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SHMTopicSubMap::iterator map_iter;
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if(topic_sub_map != NULL) {
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for (map_iter = topic_sub_map->begin(); map_iter != topic_sub_map->end(); map_iter++) {
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subscripter_set = map_iter->second;
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if(subscripter_set != NULL && (set_iter = subscripter_set->find(key) ) != subscripter_set->end()) {
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subscripter_set->erase(set_iter);
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// printf("remove_subscripter %s, %d\n", map_iter->first, key);
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count++;
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}
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}
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}
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}
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return count;
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}
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BusServerSocket::BusServerSocket() {
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logger->debug("BusServerSocket Init");
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shm_socket = shm_open_socket(SHM_SOCKET_DGRAM);
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topic_sub_map = NULL;
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}
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BusServerSocket::~BusServerSocket() {
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SHMKeySet *subscripter_set;
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SHMTopicSubMap::iterator map_iter;
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logger->debug("BusServerSocket destory 1");
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stop();
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logger->debug("BusServerSocket destory 2");
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if(topic_sub_map != NULL) {
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for (map_iter = topic_sub_map->begin(); map_iter != topic_sub_map->end(); map_iter++) {
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subscripter_set = map_iter->second;
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if(subscripter_set != NULL) {
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subscripter_set->clear();
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mm_free((void *)subscripter_set);
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}
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}
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topic_sub_map->clear();
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mem_pool_free_by_key(BUS_MAP_KEY);
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}
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shm_close_socket(shm_socket);
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logger->debug("BusServerSocket destory 3");
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}
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int BusServerSocket::bind(int key) {
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return shm_socket_bind(shm_socket, key);
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}
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/**
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* 强制绑定端口到socket, 适用于程序非正常关闭的情况下，重启程序绑定原来还没释放的key
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* @return 0 成功， 其他值 失败的错误码
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*/
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int BusServerSocket::force_bind(int key) {
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return shm_socket_force_bind(shm_socket, key);
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}
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/**
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* 启动bus
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*
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* @return 0 成功， 其他值 失败的错误码
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*/
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int BusServerSocket::start(){
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topic_sub_map = mem_pool_attach<SHMTopicSubMap>(BUS_MAP_KEY);
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run_pubsub_proxy();
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// 进程停止的时候，预留3秒资源回收的时间。否则，会发生调用close的时候，共享内存的资源还没来得及回收进程就退出了
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return 0;
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}
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int BusServerSocket::stop(){
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int ret;
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logger->debug("====>stopping");
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if( shm_socket->key <= 0) {
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return -1;
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}
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// snprintf(buf, 128, "%sstop%s%s%s%s", ACTION_LIDENTIFIER, ACTION_RIDENTIFIER, TOPIC_LIDENTIFIER, "", TOPIC_RIDENTIFIER);
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// return shm_sendto(shm_socket, buf, strlen(buf), shm_socket->key, NULL, 0);
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bus_head_t head = {};
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memcpy(head.action, "stop", sizeof(head.action));
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head.topic_size = 0;
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head.content_size = 0;
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void *buf;
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int size = ShmModSocket::get_bus_sendbuf(head, NULL, 0, NULL, 0, &buf);
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if(size > 0) {
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ret = shm_sendandrecv_unsafe(shm_socket, buf, size, shm_socket->key, NULL, NULL);
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free(buf);
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return ret;
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} else {
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return -1;
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}
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}
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/*
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* 处理订阅
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*/
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void BusServerSocket::_proxy_sub( char *topic, int key) {
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SHMKeySet *subscripter_set;
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SHMTopicSubMap::iterator map_iter;
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SHMKeySet::iterator set_iter;
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//printf("_proxy_sub topic = %s\n", topic);
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if( (map_iter = topic_sub_map->find(topic) ) != topic_sub_map->end()) {
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subscripter_set = map_iter->second;
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} else {
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void *set_ptr = mm_malloc(sizeof(SHMKeySet));
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subscripter_set = new(set_ptr) SHMKeySet;
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topic_sub_map->insert({topic, subscripter_set});
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}
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subscripter_set->insert(key);
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}
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/*
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* 处理取消订阅
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*/
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void BusServerSocket::_proxy_desub( char *topic, int key) {
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SHMKeySet *subscripter_set;
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SHMTopicSubMap::iterator map_iter;
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// SHMKeySet::iterator set_iter;
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if( (map_iter = topic_sub_map->find(topic) ) != topic_sub_map->end()) {
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subscripter_set = map_iter->second;
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subscripter_set->erase(key);
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}
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}
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/*
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* 处理取消所有订阅
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*/
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void BusServerSocket::_proxy_desub_all(int key) {
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SHMKeySet *subscripter_set;
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SHMTopicSubMap::iterator map_iter;
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// SHMKeySet::iterator set_iter;
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for (auto map_iter = topic_sub_map->begin(); map_iter != topic_sub_map->end(); map_iter++) {
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subscripter_set = map_iter->second;
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subscripter_set->erase(key);
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}
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}
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/*
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* 处理发布，代理转发
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*/
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void BusServerSocket::_proxy_pub( char *topic, void *buf, size_t size, int key) {
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SHMKeySet *subscripter_set;
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SHMTopicSubMap::iterator map_iter;
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SHMKeySet::iterator set_iter;
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std::vector<int> subscripter_to_del;
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std::vector<int>::iterator vector_iter;
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int send_key;
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struct timespec timeout = {1,0};
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if( (map_iter = topic_sub_map->find(topic) ) != topic_sub_map->end()) {
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subscripter_set = map_iter->second;
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for(set_iter = subscripter_set->begin(); set_iter != subscripter_set->end(); set_iter++) {
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send_key = *set_iter;
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// printf("_proxy_pub send before %d \n", send_key);
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if (shm_sendto(shm_socket, buf, size, send_key, &timeout) == EBUS_CLOSED ) {
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//对方已关闭的连接放到待删除队列里。如果直接删除会让iter指针出现错乱
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subscripter_to_del.push_back(send_key);
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} else {
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// printf("_proxy_pub send after: %d \n", send_key);
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}
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}
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// 删除已关闭的端
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for(vector_iter = subscripter_to_del.begin(); vector_iter != subscripter_to_del.end(); vector_iter++) {
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if((set_iter = subscripter_set->find(*vector_iter)) != subscripter_set->end()) {
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subscripter_set->erase(set_iter);
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logger->debug("remove closed subscripter %d \n", send_key);
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}
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}
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subscripter_to_del.clear();
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}
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}
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void * BusServerSocket::run_pubsub_proxy() {
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// pthread_detach(pthread_self());
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int size;
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int key;
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char * action, *topic, *topics, *buf, *content;
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size_t head_len;
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char resp_buf[128];
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bus_head_t head;
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const char *topic_delim = ",";
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// printf("run_pubsub_proxy server receive before\n");
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while(shm_recvfrom(shm_socket, (void **)&buf, &size, &key) == 0) {
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//printf("run_pubsub_proxy server recv after: %s \n", buf);
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head = ShmModSocket::decode_bus_head(buf);
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topics = buf + BUS_HEAD_SIZE;
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action = head.action;
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// printf("run_pubsub_proxy : %s, %s \n", action, topics);
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if(strcmp(action, "sub") == 0) {
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// 订阅支持多主题订阅
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topic = strtok(topics, topic_delim);
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//printf("run_pubsub_proxy topic = %s\n", topic);
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while(topic) {
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_proxy_sub(trim(topic, 0), key);
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topic = strtok(NULL, topic_delim);
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}
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}
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else if(strcmp(action, "desub") == 0) {
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// printf("desub topic=%s,%s,%d\n", topics, trim(topics, 0), strcmp(trim(topics, 0), ""));
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if(strcmp(trim(topics, 0), "") == 0) {
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// 取消所有订阅
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_proxy_desub_all(key);
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} else {
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topic = strtok(topics, topic_delim);
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while(topic) {
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_proxy_desub(trim(topic, 0), key);
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topic = strtok(NULL, topic_delim);
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}
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}
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}
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else if(strcmp(action, "pub") == 0) {
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content = topics + head.topic_size;
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_proxy_pub(topics, content, head.content_size, key);
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}
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else if(strcmp(action, "stop") == 0) {
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free(buf);
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break;
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} else {
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logger->error( "BusServerSocket::run_pubsub_proxy : unrecognized action %s", action);
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}
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free(buf);
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}
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logger->info( "Stopping Bus...");
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shm_sendto(shm_socket, "stop_finished", strlen( "stop_finished") +1, key);
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return NULL;
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}
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/**
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* deprecate
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* @str "<**sub**>{经济}"
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*/
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int BusServerSocket::parse_pubsub_topic(char *str, size_t size, char **_action, char **_topic, size_t *head_len ) {
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char *ptr = str;
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char *str_end_ptr = str + size;
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char *action_start_ptr;
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char *action_end_ptr;
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size_t action_len = 0;
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char *topic_start_ptr;
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char *topic_end_ptr;
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size_t topic_len = 0;
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// if (strlen(identifier) > strlen(str)) {
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// return 0;
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// }
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if (strncmp(ptr, ACTION_LIDENTIFIER, strlen(ACTION_LIDENTIFIER)) == 0) {
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ptr += strlen(ACTION_LIDENTIFIER);
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action_start_ptr = ptr;
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while(strncmp(++ptr, ACTION_RIDENTIFIER, strlen(ACTION_RIDENTIFIER)) != 0) {
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if(ptr >= str_end_ptr) {
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return 0;
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}
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}
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// printf("%s\n", ptr);
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action_end_ptr = ptr;
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action_len = action_end_ptr - action_start_ptr;
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ptr += strlen(ACTION_RIDENTIFIER);
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// printf("%s\n", ptr);
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// printf("%s\n", str_end_ptr-1);
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if(strncmp(ptr, TOPIC_LIDENTIFIER, strlen(TOPIC_LIDENTIFIER)) == 0 ) {
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topic_start_ptr = ptr+strlen(TOPIC_LIDENTIFIER);
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while(strncmp(++ptr, TOPIC_RIDENTIFIER, strlen(TOPIC_RIDENTIFIER)) != 0) {
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if(ptr >= str_end_ptr) {
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return 0;
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}
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}
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topic_end_ptr = ptr;
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topic_len = topic_end_ptr - topic_start_ptr;
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ptr += strlen(TOPIC_RIDENTIFIER);
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} else {
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return 0;
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}
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} else {
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return 0;
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}
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char *topic = (char *)malloc(topic_len+1);
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strncpy(topic, topic_start_ptr, topic_len);
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*(topic+topic_len) = '\0';
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*_topic = topic;
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char *action = (char *)malloc(action_len+1);
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strncpy(action, action_start_ptr, action_len);
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*(action+action_len) = '\0';
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*_action = action;
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*head_len = ptr-str;
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return 1;
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}
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