写了一个关于zookeepeer应用的简单demo
服务端定时的向zookeeper集群注册,客户端监听zookeeper服务节点变化,一旦变化,立刻响应,更新服务端列表
服务端代码:
#include <zookeeper/zookeeper.h>
#include <zookeeper/zookeeper_log.h>
#include <iostream>
using namespace std;
void InitWatch(zhandle_t* zh, int type, int state, const char* path, void* watcher) {
if (type == ZOO_SESSION_EVENT) {
if (state == ZOO_CONNECTED_STATE) {
cout << "build connection ok" << endl;
} else if (state == ZOO_EXPIRED_SESSION_STATE) {
cout << "connection disconnect" << endl;
}
}
}
void CreateWatch(int rc, const char *name, const void *data) {
if (rc == ZNODEEXISTS || rc == ZOK) {
if (rc == ZOK) {
cout << "registry ok" << endl;
} else {
cout << "node exist" << endl;
}
} else {
cout << "registry error" << endl;
}
}
int main(int argc, char* argv[]) {
const char* host = "10.7.18.31:2181,10.7.18.199:2181";
int timeout = 100000;
zoo_set_debug_level(ZOO_LOG_LEVEL_WARN);
zhandle_t* zkhandle = NULL;
zkhandle = zookeeper_init(host, InitWatch, timeout, 0, const_cast<char*>("TODO"), 0);
while (1) {
if (!zkhandle) {
zookeeper_close(zkhandle);
zkhandle = zookeeper_init(host, InitWatch, timeout, 0, const_cast<char*>("TODO"), 0);
}
if (NULL == zkhandle) {
cout << "zookeeper init error" << endl;
sleep(1);
continue;
}
int ret = zoo_acreate(zkhandle, "/cluster/index+endpoint", "", 8, &ZOO_OPEN_ACL_UNSAFE, ZOO_EPHEMERAL, CreateWatch, "create");
if (ret) {
cout << "zoo_acreate error :" << ret << endl;
}
sleep(5);
}
zookeeper_close(zkhandle);
}
客户端代码:
#include <zookeeper/zookeeper.h>
#include <zookeeper/zookeeper_log.h>
#include <iostream>
using namespace std;
void InitWatch(zhandle_t* zh, int type, int state, const char* path, void* watcher) {
if (type == ZOO_SESSION_EVENT) {
if (state == ZOO_CONNECTED_STATE) {
cout << "build connection ok" << endl;
} else if (state == ZOO_EXPIRED_SESSION_STATE) {
cout << "connection disconnect" << endl;
}
}
}
void CreateWatch(int rc, const char *name, const void *data) {
if (rc == ZNODEEXISTS || rc == ZOK) {
if (rc == ZOK) {
cout << "registry ok" << endl;
} else {
cout << "node exist" << endl;
}
} else {
cout << "registry error" << endl;
}
}
int main(int argc, char* argv[]) {
const char* host = "10.7.18.31:2181,10.7.18.199:2181";
int timeout = 100000;
zoo_set_debug_level(ZOO_LOG_LEVEL_WARN);
zhandle_t* zkhandle = NULL;
zkhandle = zookeeper_init(host, InitWatch, timeout, 0, const_cast<char*>("TODO"), 0);
while (1) {
if (!zkhandle) {
zookeeper_close(zkhandle);
zkhandle = zookeeper_init(host, InitWatch, timeout, 0, const_cast<char*>("TODO"), 0);
}
if (NULL == zkhandle) {
cout << "zookeeper init error" << endl;
sleep(1);
continue;
}
int ret = zoo_acreate(zkhandle, "/cluster/index+endpoint", "", 8, &ZOO_OPEN_ACL_UNSAFE, ZOO_EPHEMERAL, CreateWatch, "create");
if (ret) {
cout << "zoo_acreate error :" << ret << endl;
}
sleep(5);
}
zookeeper_close(zkhandle);
}
原文:http://my.oschina.net/hejiula/blog/358097