基于zookeeper实现分布式配置中心(二)
上一篇(基于zookeeper实现分布式配置中心(一))讲述了zookeeper相关概念和工作原理。接下来根据zookeeper的特性,简单实现一个分布式配置中心。
配置中心的优势
1、各环境配置集中管理。
2、配置更改,实时推送,jvm环境变量及时生效。
3、依靠配置变更,动态扩展功能,减少二次上线带来的成本。
4、减少开发人员、运维人员修改配置带来的额外开销。
配置中心架构图
配置中心功能
1、配置管理平台中,操作人员可以创建项目所属系统、应用名称、实例名称、配置分组等信息。
2、配置管理平台中,操作人员可以上传配置文件,对属性有增、删、改、查的操作。
3、配置内容通过配置管理平台后台服务进行持久化(保存到数据库中)。
4、操作人员通过配置平台进行推送操作,将配置推送到zk集群相应结点(/cfgcenter/系统名称/应用名称/实例名称/分组名称)。
5、配置中心客户端监听zk集群中对应结点数据发生变化,读取变更后的内容,解析内容,刷新本地备份(分布式容灾)和Spring环境变量。
6、配置中心客户端如果和zk集群丢失连接,将加载本地本分配置到Spring环境变量。
7、配置中心客户端重新和zk集群建立连接,从zk集群中拉取最新配置内容,解析配置,刷新本地备份(分布式容灾)和Spring环境变量。
8、配置中心客户端将Spring环境变量刷新之后,动态刷新依赖配置中心配置的bean。
配置中心代码视图
配置中心客户端设计解析
配置中心客户端初始化
- @Component
- public class CfgcenterInit implements ApplicationContextInitializer<ConfigurableWebApplicationContext>, ApplicationListener<ApplicationEvent> {
- private static Logger LOGGER = LoggerFactory.getLogger(CfgcenterInit.class);
- @Override
- public void onApplicationEvent(ApplicationEvent event) {
- if (event instanceof ContextRefreshedEvent) {
- LOGGER.info("初始化配置中心客户端监听器...");
- ZKClient.getInstance()
- .init();
- } else if (event instanceof RefreshEvent) {
- ZKClient.getInstance()
- .getAeb()
- .post(event);
- } else if (event instanceof ContextClosedEvent) {
- if (null != ZKClient.getInstance().getCw()) {
- ZKClient.getInstance()
- .getCw()
- .close();
- }
- }
- }
- @Override
- public void initialize(ConfigurableWebApplicationContext cac) {
- try {
- ZookeeperProperties zookeeperProperties = ConfigurationBinder
- .withPropertySources(cac.getEnvironment())
- .bind(ZookeeperProperties.class);
- if (!zookeeperProperties.isEnabled()) {
- LOGGER.info("未开启配置中心客戶端...");
- return;
- }
- ZKClient.getInstance()
- .binding(
- zookeeperProperties
- , new ZookeeperConfigProperties()
- , cac
- );
- } catch (Exception e) {
- LOGGER.error("配置中心客户端初始化异常...", e);
- }
- }
- }
1、ApplicationContextInitializer#initialize方法中,获取zk连接信息配置,如果开启配置中心客户端,将ZookeeperProperties(zk集群连接信息)、ZookeeperConfigProperties(客户端监听zk集群结点信息)、ConfigurableWebApplicationContext (应用上下文)绑定到ZKClient实例中去。
2、ApplicationListener#onApplicationEvent方法中监听ContextRefreshedEvent(初始化配置中心客户端监听器)、RefreshEvent(配置刷新事件,通过guava的事件总线进行推送)、ContextClosedEvent(关闭配置中心客户端资源)。
配置中心客户端监听器
- public class ConfigWatcher implements Closeable, TreeCacheListener {
- private static Logger LOGGER = LoggerFactory.getLogger(ConfigWatcher.class);
- private AtomicBoolean running = new AtomicBoolean(false);
- private String context;
- private CuratorFramework source;
- private HashMap<String, TreeCache> caches;
- public ConfigWatcher(String context, CuratorFramework source) {
- this.context = context;
- this.source = source;
- }
- public void start() {
- if (this.running.compareAndSet(false, true)) {
- this.caches = new HashMap<>();
- if (!context.startsWith("/")) {
- context = "/" + context;
- }
- try {
- TreeCache cache = TreeCache.newBuilder(this.source, context).build();
- cache.getListenable().addListener(this);
- cache.start();
- this.caches.put(context, cache);
- // no race condition since ZookeeperAutoConfiguration.curatorFramework
- // calls curator.blockUntilConnected
- } catch (KeeperException.NoNodeException e) {
- // no node, ignore
- } catch (Exception e) {
- LOGGER.error("Error initializing listener for context " + context, e);
- }
- }
- }
- @Override
- public void close() {
- if (this.running.compareAndSet(true, false)) {
- for (TreeCache cache : this.caches.values()) {
- cache.close();
- }
- this.caches = null;
- }
- }
- @Override
- public void childEvent(CuratorFramework client, TreeCacheEvent event) {
- TreeCacheEvent.Type eventType = event.getType();
- switch (eventType) {
- case INITIALIZED:
- LOGGER.info("配置中心客户端同步服务端状态完成...");
- refreshEnvAndBeans(event);
- break;
- case NODE_REMOVED:
- case NODE_UPDATED:
- refreshEnvAndBeans(event);
- break;
- case CONNECTION_SUSPENDED:
- case CONNECTION_LOST:
- LOGGER.info("配置中心客户端与服务端连接异常...");
- break;
- case CONNECTION_RECONNECTED:
- LOGGER.info("配置中心客户端与服务端重新建立连接...");
- break;
- }
- }
- private void refreshEnvAndBeans(TreeCacheEvent event) {
- //刷新环境变量
- ZKClient.getInstance()
- .refreshEnvironment();
- //刷新Bean
- ZKClient.getInstance()
- .getAep()
- .publishEvent(
- new RefreshEvent(this, event, getEventDesc(event))
- );
- }
- private String getEventDesc(TreeCacheEvent event) {
- StringBuilder out = new StringBuilder();
- out.append("type=").append(event.getType());
- TreeCacheEvent.Type eventType = event.getType();
- if (eventType == NODE_UPDATED
- || eventType == NODE_REMOVED) {
- out.append(", path=").append(event.getData().getPath());
- byte[] data = event.getData().getData();
- if (data != null) {
- out.append(", data=").append(new String(data, StandardCharsets.UTF_8));
- }
- }
- return out.toString();
- }
- }
1、通过TreeCache监听路径/cfgcenter/系统名称/应用名称/实例名称/分组名称(该路径下可能会存在多个子节点,每个子节点对应一份配置,每一份配置大小不能超过64k)。
2、TreeCache监听事件类型如下
- INITIALIZED(完成同步服务端状态,同步状态【NODE_REMOVED、 NODE_UPDATED、CONNECTION_RECONNECTED】之后触发)
- NODE_REMOVED(结点移除触发)
- NODE_UPDATED(结点数据更新触发)
- CONNECTION_SUSPENDED(连接丢失触发)
- CONNECTION_LOST(完全丢失连接触发)
- CONNECTION_RECONNECTED(重新连接触发)
3、监听到INITIALIZED、NODE_UPDATED、NODE_REMOVED事件之后,执行refreshEnvAndBeans方法,刷新spring环境变量,同时刷新spring容器相关的Bean。
配置中心客户端刷新spring环境变量
- public class ZookeeperPropertySourceLocator {
- public static final String ZOOKEEPER_PREPERTY_SOURCE_NAME = "cfg-zookeeper";
- private ZookeeperConfigProperties properties;
- private CuratorFramework curator;
- private static Logger LOGGER = LoggerFactory.getLogger(ZookeeperPropertySourceLocator.class);
- public ZookeeperPropertySourceLocator(CuratorFramework curator, ZookeeperConfigProperties properties) {
- this.curator = curator;
- this.properties = properties;
- }
- public String getContext() {
- return this.properties.getContext();
- }
- public PropertySource getCfgcenterPropertySource(Environment environment) {
- ConfigurableEnvironment env = (ConfigurableEnvironment) environment;
- return env.getPropertySources().get(ZOOKEEPER_PREPERTY_SOURCE_NAME);
- }
- public void locate(Environment environment) {
- if (environment instanceof ConfigurableEnvironment) {
- ConfigurableEnvironment env = (ConfigurableEnvironment) environment;
- String context = properties.getContext();
- CompositePropertySource composite = new CompositePropertySource(ZOOKEEPER_PREPERTY_SOURCE_NAME);
- try {
- PropertySource propertySource = create(context);
- composite.addPropertySource(propertySource);
- if (null != env.getPropertySources().get(ZOOKEEPER_PREPERTY_SOURCE_NAME)) {
- LOGGER.info("替换PropertySource: " + ZOOKEEPER_PREPERTY_SOURCE_NAME);
- env.getPropertySources().replace(ZOOKEEPER_PREPERTY_SOURCE_NAME, composite);
- } else {
- LOGGER.info("添加PropertySource: " + ZOOKEEPER_PREPERTY_SOURCE_NAME);
- env.getPropertySources().addFirst(composite);
- }
- } catch (Exception e) {
- if (this.properties.isFailFast()) {
- ReflectionUtils.rethrowRuntimeException(e);
- } else {
- LOGGER.error("Unable to load zookeeper config from " + context, e);
- }
- }
- }
- }
- @PreDestroy
- public void destroy() {
- }
- private void backupZookeeperPropertySource(ZookeeperPropertySource zps) {
- String backupDir = BASE_BACKUP_DIR + this.properties.getContext();
- String backupFile = String.format("%s/%s", backupDir, APP_NAME + ".properties");
- File bakFile = new File(backupFile);
- StringBuilder data = new StringBuilder();
- for (String propertyName : zps.getPropertyNames()) {
- data.append(propertyName)
- .append("=")
- .append(zps.getProperty(propertyName))
- .append(System.lineSeparator());
- }
- try {
- FileUtils.writeStringToFile(bakFile, data.toString(), Charsets.UTF_8);
- LOGGER.info("配置中心客户端刷新本地备份完成, path: " + backupDir);
- } catch (IOException e) {
- LOGGER.error("配置中心客户端刷新本地备份异常..., path: " + backupDir, e);
- }
- }
- private PropertySource<CuratorFramework> create(String context) {
- ZookeeperPropertySource zps;
- if (ZKClient.getInstance().isConnected()) {
- zps = new ZookeeperPropertySource(context, this.curator, false);
- this.backupZookeeperPropertySource(zps);
- } else {
- zps = new ZookeeperPropertySource(context, this.curator, true);
- }
- return zps;
- }
- }
ZookeeperPropertySourceLocator会创建ZookeeperPropertySource,然后放入Spring的Environment变量中。如果配置中心客户端和zk集群处于连接状态,加载完ZookeeperPropertySource之后,备份到本地。
- public class ZookeeperPropertySource extends AbstractZookeeperPropertySource {
- private static Logger LOGGER = LoggerFactory.getLogger(ZookeeperPropertySource.class);
- private Map<String, String> properties = new LinkedHashMap<>();
- public ZookeeperPropertySource(String context, CuratorFramework source, boolean backup) {
- super(context, source);
- //加载本地配置
- if (backup) {
- String backupDir = BASE_BACKUP_DIR + this.getContext();
- String backupFile = String.format("%s/%s", backupDir, APP_NAME + ".properties");
- try {
- InputStream is = FileUtils.openInputStream(new File(backupFile));
- InputStreamReader isr = new InputStreamReader(is);
- Properties properties = new Properties();
- properties.load(isr);
- properties.forEach((k, v) -> this.properties.put((String) k, (String) v));
- } catch (Exception e) {
- LOGGER.error("配置中心客户端本地配置加载异常...", e);
- }
- }
- //加载远程配置
- else {
- findProperties(this.getContext(), null);
- }
- }
- @Override
- public Object getProperty(String name) {
- return this.properties.get(name);
- }
- private byte[] getPropertyBytes(String fullPath) {
- try {
- byte[] bytes = null;
- try {
- bytes = this.getSource().getData().forPath(fullPath);
- } catch (KeeperException e) {
- if (e.code() != KeeperException.Code.NONODE) {
- throw e;
- }
- }
- return bytes;
- } catch (Exception exception) {
- ReflectionUtils.rethrowRuntimeException(exception);
- }
- return null;
- }
- @Override
- public String[] getPropertyNames() {
- Set<String> strings = this.properties.keySet();
- return strings.toArray(new String[strings.size()]);
- }
- private void findProperties(String path, List<String> children) {
- try {
- LOGGER.info("entering findProperties for path: " + path);
- if (children == null) {
- children = getChildren(path);
- }
- if (children == null || children.isEmpty()) {
- return;
- }
- for (String child : children) {
- String childPath = path + "/" + child;
- List<String> childPathChildren = getChildren(childPath);
- byte[] bytes = getPropertyBytes(childPath);
- if (!ArrayUtils.isEmpty(bytes)) {
- registerKeyValue(childPath, new String(bytes, Charset.forName("UTF-8")));
- }
- // Check children even if we have found a value for the current znode
- findProperties(childPath, childPathChildren);
- }
- LOGGER.info("leaving findProperties for path: " + path);
- } catch (Exception exception) {
- ReflectionUtils.rethrowRuntimeException(exception);
- }
- }
- private void registerKeyValue(String path, String value) {
- String key = sanitizeKey(path);
- LOGGER.info(String.format("配置中心客户端解析配置节点(%s),数据:%s", key, value));
- try {
- Properties properties = new Properties();
- properties.load(new StringReader(value));
- properties.forEach((k, v) -> this.properties.put((String) k, (String) v));
- } catch (IOException e) {
- LOGGER.info(String.format("配置中心客户端解析配置节点(%s)异常...", key));
- }
- }
- private List<String> getChildren(String path) throws Exception {
- List<String> children = null;
- try {
- children = this.getSource().getChildren().forPath(path);
- } catch (KeeperException e) {
- if (e.code() != KeeperException.Code.NONODE) {
- throw e;
- }
- }
- return children;
- }
- }
ZookeeperPropertySource通过构造参数backup来判断是加载zk集群中的配置还是本地备份配置。
配置中心客户端刷新Spring容器Bean
- public abstract class BaseCfgcenterBean implements InitializingBean {
- private static Logger LOGGER = LoggerFactory.getLogger(BaseCfgcenterBean.class);
- @PostConstruct
- public void init() {
- //注册到时间总线中
- ZKClient.getInstance()
- .getAeb()
- .register(this);
- }
- /**
- * z
- * 绑定自身目标
- **/
- protected void doBind() {
- Class<? extends BaseCfgcenterBean> clazz = this.getClass();
- if (org.springframework.util.ClassUtils.isCglibProxy(this)) {
- clazz = (Class<? extends BaseCfgcenterBean>) AopUtils.getTargetClass(this);
- }
- BaseCfgcenterBean target = binding(clazz, this.getDefaultResourcePath());
- this.copyProperties(target);
- }
- private void copyProperties(BaseCfgcenterBean target) {
- ReflectionUtils.doWithFields(this.getClass(), field -> {
- field.setAccessible(true);
- field.set(this, field.get(target));
- }, field -> AnnotatedElementUtils.isAnnotated(field, ConfigField.class));
- }
- /**
- * 绑定其他目标
- *
- * @param clazz 目标类
- **/
- protected <T> T doBind(Class<T> clazz) {
- T target = binding(clazz, this.getDefaultResourcePath());
- if (target instanceof InitializingBean) {
- try {
- ((InitializingBean) target).afterPropertiesSet();
- } catch (Exception e) {
- LOGGER.error(String.format("属性初始化失败[afterPropertiesSet], class=%s", ClassUtils.getSimpleName(clazz), e));
- }
- }
- return target;
- }
- private <T> T binding(Class<T> clazz, String defaultResourcePath) {
- Optional<PropertySource> propertySource = Optional.empty();
- //加载配置中心配置
- if (ZKClient.getInstance().isZkInit()) {
- propertySource = Optional.ofNullable(
- ZKClient.getInstance()
- .resolvePropertySource()
- );
- }
- //加载本地配置
- else {
- Optional<ResourcePropertySource> resourcePropertySource = ResourceUtils.getResourcePropertySource(defaultResourcePath);
- if (resourcePropertySource.isPresent()) {
- propertySource = Optional.ofNullable(resourcePropertySource.get());
- }
- }
- if (propertySource.isPresent()) {
- T target;
- try {
- target = ConfigurationBinder
- .withPropertySources(propertySource.get())
- .bind(clazz);
- } catch (Exception e) {
- LOGGER.error(String.format("属性绑定失败, class=%s", ClassUtils.getSimpleName(clazz)), e);
- return null;
- }
- return target;
- }
- return null;
- }
- @Override
- public void afterPropertiesSet() {
- Class<?> target = this.getClass();
- if (AopUtils.isAopProxy(this)) {
- target = AopUtils.getTargetClass(this);
- }
- LOGGER.info(String.format("%s->%s模块引入配置中心%s..."
- , this.getModuleName()
- , ClassUtils.getSimpleName(target)
- , (ZKClient.getInstance()
- .isConnected() ? "生效" : "无效")
- ));
- }
- public String getModuleName() {
- return StringUtils.EMPTY;
- }
- @Subscribe
- public void listenRefreshEvent(RefreshEvent refreshEvent) {
- this.afterPropertiesSet();
- LOGGER.info(refreshEvent.getEventDesc());
- this.refresh();
- }
- //通过事件进行刷新
- protected void refresh() {
- this.doBind();
- }
- //获取本地配置默认路径
- protected abstract String getDefaultResourcePath();
- }
1、对象自身实现guava事件总线监听,监听RefreshEvent事件,触发对象属性刷新操作。
2、对象初始化时,注册自身目标到guava的事件总线对象中。
3、对象属性刷新,获取到PropertySource对象(配置中心配置或者项目自身静态配置),通过ConfigurationBinder工具类将配置重新绑定的对象属性。
配置管理平台接口
- @RestController
- @RequestMapping("cfg")
- public class CfgController {
- private static Logger LOGGER = LoggerFactory.getLogger(CfgController.class);
- private static final String ZK_PATH_PATTERN0 = "/wmhcfg/projects/%s/%s";
- private static final String ZK_PATH_PATTERN1 = ZK_PATH_PATTERN0 + "/%s";
- private static final String ZK_PATH_PATTERN = ZK_PATH_PATTERN1 + "/%s";
- @Autowired
- private CfgMapper mapper;
- @GetMapping(value = "/search", produces = MediaType.TEXT_PLAIN_VALUE)
- public String findCfgContents(@RequestBody @Validated SearchVO searchVO
- , @RequestParam(required = false) String cfgId) {
- List<CfgRecord> records = mapper.findRecords(searchVO);
- if (CollectionUtils.isEmpty(records)) {
- return StringUtils.EMPTY;
- }
- if (StringUtils.isNotBlank(cfgId)) {
- records = records.stream().filter(record -> cfgId.equals(record.getCfgId())).collect(Collectors.toList());
- }
- StringBuilder response = new StringBuilder();
- Properties properties = new Properties();
- records.forEach(record -> {
- try {
- properties.clear();
- properties.load(new StringReader(record.getCfgContent()));
- properties.forEach((key, value) -> response.append(key)
- .append("=")
- .append(value)
- .append(System.lineSeparator())
- .append(System.lineSeparator())
- );
- } catch (IOException e) {
- LOGGER.error("配置解析异常...", e);
- }
- });
- return response.toString();
- }
- @PostMapping(value = "/send/{systemId}/{appId}/{groupId}/{cfgId}", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
- public BaseResponse sendCfgContent(@RequestBody String cfgContent
- , @PathVariable String systemId
- , @PathVariable String appId
- , @PathVariable String groupId
- , @PathVariable String cfgId) {
- BaseResponse baseResponse = new BaseResponse();
- baseResponse.setRestStatus(RestStatus.SUCCESS);
- SearchVO searchVO = new SearchVO();
- searchVO.setSystemId(systemId);
- searchVO.setAppId(appId);
- searchVO.setGroupId(groupId);
- List<CfgRecord> records = mapper.findRecords(searchVO);
- CfgRecord record = null;
- if (!CollectionUtils.isEmpty(records)) {
- for (CfgRecord cfgRecord : records) {
- if (cfgId.equals(cfgRecord.getCfgId())) {
- record = cfgRecord;
- record.setCfgContent(cfgContent);
- break;
- }
- }
- }
- if (null == record) {
- record = new CfgRecord();
- record.setSystemId(systemId);
- record.setAppId(appId);
- record.setGroupId(groupId);
- record.setCfgId(cfgId);
- record.setCfgContent(cfgContent);
- }
- StringBuilder cfgContentSB = new StringBuilder();
- Properties properties = new Properties();
- try {
- properties.load(new StringReader(record.getCfgContent()));
- } catch (IOException e) {
- LOGGER.error("配置解析异常...", e);
- baseResponse.setErrors(e.getMessage());
- baseResponse.setRestStatus(RestStatus.FAIL_50001);
- return baseResponse;
- }
- properties.forEach((key, value) -> cfgContentSB.append(key)
- .append("=")
- .append(value)
- .append(System.lineSeparator())
- );
- record.setCfgContent(cfgContentSB.toString());
- if (null == record.getId()) {
- mapper.insertRecord(record);
- } else {
- mapper.updateRecord(record);
- }
- return baseResponse;
- }
- @PostMapping(value = "/push", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
- public BaseResponse pushCfgContent(@RequestBody @Validated PushVO pushVO) {
- BaseResponse baseResponse = new BaseResponse();
- baseResponse.setRestStatus(RestStatus.SUCCESS);
- String path = String.format(ZK_PATH_PATTERN
- , pushVO.getSystemId()
- , pushVO.getAppId()
- , pushVO.getGroupId()
- , pushVO.getCfgId()
- );
- try {
- SearchVO searchVO = new SearchVO();
- searchVO.setSystemId(pushVO.getSystemId());
- searchVO.setAppId(pushVO.getAppId());
- searchVO.setGroupId(pushVO.getGroupId());
- List<CfgRecord> records = mapper.findRecords(searchVO);
- StringBuilder cfgContent = new StringBuilder();
- records.forEach(record -> cfgContent.append(record.getCfgContent()).append(System.lineSeparator()));
- if (!ZKHelper.setData(path, cfgContent.toString().getBytes())) {
- baseResponse.setRestStatus(RestStatus.FAIL_50001);
- }
- } catch (Exception e) {
- LOGGER.error("配置推送异常...", e);
- baseResponse.setRestStatus(RestStatus.FAIL_50001);
- baseResponse.setErrors(e.getMessage());
- }
- return baseResponse;
- }
- @PostMapping(value = "/create", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
- public BaseResponse createCfg(@RequestBody @Validated PushVO pushVO) {
- BaseResponse baseResponse = new BaseResponse();
- String path = String.format(ZK_PATH_PATTERN
- , pushVO.getSystemId()
- , pushVO.getAppId()
- , pushVO.getGroupId()
- , pushVO.getCfgId()
- );
- if (ZKHelper.createPath(path)) {
- baseResponse.setRestStatus(RestStatus.SUCCESS);
- } else {
- baseResponse.setRestStatus(RestStatus.FAIL_50001);
- }
- return baseResponse;
- }
- @PostMapping(value = "/delete", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
- public BaseResponse deleteCfg(@RequestBody @Validated DeleteVO deleteVO) {
- BaseResponse baseResponse = new BaseResponse();
- String path;
- if (StringUtils.isBlank(deleteVO.getGroupId())) {
- path = String.format(ZK_PATH_PATTERN0
- , deleteVO.getSystemId()
- , deleteVO.getAppId()
- );
- } else if (StringUtils.isNotBlank(deleteVO.getGroupId()) && StringUtils.isBlank(deleteVO.getCfgId())) {
- path = String.format(ZK_PATH_PATTERN1
- , deleteVO.getSystemId()
- , deleteVO.getAppId()
- , deleteVO.getGroupId()
- );
- } else {
- path = String.format(ZK_PATH_PATTERN
- , deleteVO.getSystemId()
- , deleteVO.getAppId()
- , deleteVO.getGroupId()
- , deleteVO.getCfgId()
- );
- }
- if (ZKHelper.deletePath(path)) {
- baseResponse.setRestStatus(RestStatus.SUCCESS);
- } else {
- baseResponse.setRestStatus(RestStatus.FAIL_50001);
- }
- return baseResponse;
- }
- @GetMapping(value = "/getdata", produces = MediaType.TEXT_PLAIN_VALUE)
- public String getData(@RequestParam String path) {
- return ZKHelper.getData(path);
- }
- }
为配置管理前端提供配置保存、配置推送、配置删除等操作。
配置中心测试
- @Component
- @ConfigurationProperties(prefix = "cfg.test")
- public class TestCfgcenterBean extends BaseCfgcenterBean {
- @ConfigField
- private String text;
- @ConfigField
- private Map<String, List<String>> map;
- public String getText() {
- return text;
- }
- public void setText(String text) {
- this.text = text;
- }
- public Map<String, List<String>> getMap() {
- return map;
- }
- public void setMap(Map<String, List<String>> map) {
- this.map = map;
- }
- @Override
- protected String getDefaultResourcePath() {
- return StringUtils.EMPTY;
- }
- @Override
- protected void refresh() {
- super.refresh();
- System.out.println("text=" + this.text);
- System.out.println("map=" + JSON.toJSONString(map));
- }
- }
TestCfgcenterBean继承BaseCfgcenterBean,配置中心配置变更后可以自动将新的配置绑定到对象上。
- @SpringBootApplication(exclude = RedissonAutoConfiguration.class)
- @EnableAspectJAutoProxy(proxyTargetClass = true, exposeProxy = true)
- @EnableRetry
- public class SpringbootApplication {
- public static void main(String[] args) {
- System.setProperty("xxx.system.id", "test_system");
- System.setProperty("xxx.app.id", "test_app");
- System.setProperty("groupenv", "x");
- SpringApplication.run(SpringbootApplication.class, args);
- }
- }
启动类设置配置中心客户端需要的环境变量:系统标识、项目标识、分组标识。
客户端与zk第一建立连接,同步完状态之后,触发INITIALIZED事件,刷新bean属性配置。
客户端与zk断开重连之后,同步完状态后触发INITIALIZED事件,刷新bean属性配置。
需要源码
请关注订阅号,回复:cfgcenter, 便可查看。
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