SpringBoot admin 2.0 詳解
1、什麼是Spring Boot Admin ？
Spring Boot Admin是一個開源社區項目，用於管理和監控SpringBoot應用程序。 應用程序做爲Spring Boot Admin Client向爲Spring Boot Admin Server註冊（經過HTTP）或使用SpringCloud註冊中心（例如Eureka，Consul）發現。 UI是的Vue.js應用程序，展現Spring Boot Admin Client的Actuator端點上的一些監控。服務端採用Spring WebFlux + Netty的方式。Spring Boot Admin爲註冊的應用程序提供如下功能：php
- 顯示健康情況
- 顯示詳細信息，例如
- JVM和內存指標
- micrometer.io指標
- 數據源指標
- 緩存指標
- 顯示構建信息編號
- 關注並下載日誌文件
- 查看jvm system-和environment-properties
- 查看Spring Boot配置屬性
- 支持Spring Cloud的postable / env-和/ refresh-endpoint
- 輕鬆的日誌級管理
- 與JMX-beans交互
- 查看線程轉儲
- 查看http-traces
- 查看auditevents
- 查看http-endpoints
- 查看計劃任務
- 查看和刪除活動會話（使用spring-session）
- 查看Flyway / Liquibase數據庫遷移
- 下載heapdump
- 狀態變動通知（經過電子郵件，Slack，Hipchat，......）
- 狀態更改的事件日誌（非持久性）
2、入門
1. 建立 Spring Boot Admin Server
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.gf</groupId>
<artifactId>admin-server</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>admin-server</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-boot-admin.version>2.1.0</spring-boot-admin.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-starter-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-dependencies</artifactId>
<version>${spring-boot-admin.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
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application.yml
spring:
application:
name: admin-server
server:
port: 8769
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啓動類 AdminServerApplication
啓動類加上@EnableAdminServer註解，開啓AdminServer的功能：java
@SpringBootApplication
@EnableAdminServer
public class AdminServerApplication {
public static void main(String[] args) {
SpringApplication.run( AdminServerApplication.class, args );
}
}
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2. 建立 Spring Boot Admin Client
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.gf</groupId>
<artifactId>admin-client</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>admin-client</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-boot-admin.version>2.1.0</spring-boot-admin.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-starter-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-dependencies</artifactId>
<version>${spring-boot-admin.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
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application.yml
- spring.boot.admin.client.url：要註冊的Spring Boot Admin Server的URL。
- management.endpoints.web.exposure.include：與Spring Boot 2同樣，默認狀況下，大多數actuator的端口都不會經過http公開，* 表明公開全部這些端點。對於生產環境，應該仔細選擇要公開的端點。
spring:
application:
name: admin-client
boot:
admin:
client:
url: http://localhost:8769
server:
port: 8768
management:
endpoints:
web:
exposure:
include: '*'
endpoint:
health:
show-details: ALWAYS
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啓動類 AdminClientApplication
@SpringBootApplication
public class AdminClientApplication {
public static void main(String[] args) {
SpringApplication.run( AdminClientApplication.class, args );
}
}
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啓動兩個工程，在瀏覽器上輸入localhost:8769 ，瀏覽器顯示的界面以下：git
查看wallboard：github
點擊wallboard，能夠查看admin-client具體的信息，好比內存狀態信息：web
查看spring bean的狀況：redis
查看應用程序運行情況，信息和詳細：spring
還有不少監控信息，多點一點就知道。數據庫
3、集成 Eureka
1. 建立 sc-eureka-server
這是一個 eureka-server 註冊中心。apache
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.gf</groupId>
<artifactId>sc-admin-server</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>sc-admin-server</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-boot-admin.version>2.1.0</spring-boot-admin.version>
<spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-starter-server</artifactId>
<version>2.1.0</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>
<groupId>org.jolokia</groupId>
<artifactId>jolokia-core</artifactId>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-dependencies</artifactId>
<version>${spring-boot-admin.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
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application.yml
spring:
application:
name: sc-eureka-server
server:
port: 8761
eureka:
client:
service-url:
defaultZone: http://localhost:8761/eureka
register-with-eureka: false
fetch-registry: false
management:
endpoints:
web:
exposure:
include: "*"
endpoint:
health:
show-details: ALWAYS
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啓動類 ScEurekaServerApplication
@SpringBootApplication
@EnableEurekaServer
public class ScEurekaServerApplication {
public static void main(String[] args) {
SpringApplication.run( ScEurekaServerApplication.class, args );
}
}
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2. 建立 sc-admin-server
這是一個 Spring Boot Admin Server端。瀏覽器
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.gf</groupId>
<artifactId>sc-admin-server</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>sc-admin-server</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-boot-admin.version>2.1.0</spring-boot-admin.version>
<spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-starter-server</artifactId>
<version>2.1.0</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>
<groupId>org.jolokia</groupId>
<artifactId>jolokia-core</artifactId>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-dependencies</artifactId>
<version>${spring-boot-admin.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
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application.yml
spring:
application:
name: admin-server
server:
port: 8769
eureka:
client:
registryFetchIntervalSeconds: 5
service-url:
defaultZone: ${EUREKA_SERVICE_URL:http://localhost:8761}/eureka/
instance:
leaseRenewalIntervalInSeconds: 10
health-check-url-path: /actuator/health
management:
endpoints:
web:
exposure:
include: "*"
endpoint:
health:
show-details: ALWAYS
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啓動類 ScAdminServerApplication
@SpringBootApplication
@EnableAdminServer
@EnableDiscoveryClient
public class ScAdminServerApplication {
public static void main(String[] args) {
SpringApplication.run( ScAdminServerApplication.class, args );
}
}
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3. 建立 sc-admin-client
這是一個 Spring Boot Admin client 端。
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.gf</groupId>
<artifactId>sc-admin-client</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>sc-admin-client</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-boot-admin.version>2.1.0</spring-boot-admin.version>
<spring-cloud.version>Finchley.SR2</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-starter-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-dependencies</artifactId>
<version>${spring-boot-admin.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
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application.yml
spring:
application:
name: sc-admin-client
eureka:
instance:
leaseRenewalIntervalInSeconds: 10
health-check-url-path: /actuator/health
client:
registryFetchIntervalSeconds: 5
service-url:
defaultZone: ${EUREKA_SERVICE_URL:http://localhost:8761}/eureka/
management:
endpoints:
web:
exposure:
include: "*"
endpoint:
health:
show-details: ALWAYS
server:
port: 8762
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啓動類 ScAdminClientApplication
@SpringBootApplication
@EnableDiscoveryClient
public class ScAdminClientApplication {
public static void main(String[] args) {
SpringApplication.run( ScAdminClientApplication.class, args );
}
}
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啓動三個工程，訪問localhost:8769，出現以下界面：
admin 會本身拉取 Eureka 上註冊的 app 信息，主動去註冊。這也是惟一區別以前入門中手動註冊的地方，就是 client 端不須要 admin-client 的依賴，也不須要配置 admin 地址了，一切所有由 admin-server 本身實現。這樣的設計對環境變化很友好，不用改了admin-server後去改全部app 的配置了。
4、集成 Spring Security
Web應用程序中的身份驗證和受權有多種方法，所以Spring Boot Admin不提供默認方法。默認狀況下，spring-boot-admin-server-ui提供登陸頁面和註銷按鈕。咱們結合 Spring Security 實現須要用戶名和密碼登陸的安全認證。
sc-admin-server工程的pom文件須要增長如下的依賴：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
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在 sc-admin-server工的配置文件 application.yml 中配置 spring security 的用戶名和密碼，這時須要在服務註冊時帶上 metadata-map 的信息，以下：
spring:
security:
user:
name: "admin"
password: "admin"
eureka:
instance:
metadata-map:
user.name: ${spring.security.user.name}
user.password: ${spring.security.user.password}
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@EnableWebSecurity註解以及WebSecurityConfigurerAdapter一塊兒配合提供基於web的security。繼承了WebSecurityConfigurerAdapter以後，再加上幾行代碼，咱們就能實現要求用戶在進入應用的任何URL以前都進行驗證的功能，寫一個配置類SecuritySecureConfig繼承WebSecurityConfigurerAdapter，配置以下：
@Configuration
public class SecuritySecureConfig extends WebSecurityConfigurerAdapter {
private final String adminContextPath;
public SecuritySecureConfig(AdminServerProperties adminServerProperties) {
this.adminContextPath = adminServerProperties.getContextPath();
}
@Override
protected void configure(HttpSecurity http) throws Exception {
// @formatter:off
SavedRequestAwareAuthenticationSuccessHandler successHandler = new SavedRequestAwareAuthenticationSuccessHandler();
successHandler.setTargetUrlParameter("redirectTo");
successHandler.setDefaultTargetUrl(adminContextPath + "/");
http.authorizeRequests()
//授予對全部靜態資產和登陸頁面的公共訪問權限。
.antMatchers(adminContextPath + "/assets/**").permitAll()
.antMatchers(adminContextPath + "/login").permitAll()
//必須對每一個其餘請求進行身份驗證
.anyRequest().authenticated()
.and()
//配置登陸和註銷
.formLogin().loginPage(adminContextPath + "/login").successHandler(successHandler).and()
.logout().logoutUrl(adminContextPath + "/logout").and()
//啓用HTTP-Basic支持。這是Spring Boot Admin Client註冊所必需的
.httpBasic().and();
// @formatter:on
}
}
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從新訪問 http://localhost:8769/ 會出現登陸界面，密碼是 配置文件中配置好的，帳號 admin 密碼 admin，界面以下：
5、通知
1. 郵件通知
在 Spring Boot Admin 中 當註冊的應用程序狀態更改成DOWN、UNKNOWN、OFFLINE 均可以指定觸發通知，下面講解配置郵件通知。
在sc-admin-server工程pom文件，加上mail的依賴，以下：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
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在配置文件application.yml文件中，配置收發郵件的配置：
spring:
mail:
host: smtp.163.com
username: xxxx@163.com
password: xxxx
properties:
mail:
smtp:
auth: true
starttls:
enable: true
required: true
boot:
admin:
notify:
mail:
from: xxxx@163.com
to: xxxx@qq.com
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配置後，重啓sc-admin-server工程，以後若出現註冊的客戶端的狀態從 UP 變爲 OFFLINE 或其餘狀態，服務端就會自動將電子郵件發送到上面配置的收件地址。
注意 : 配置了郵件通知後，會出現 反覆通知 service offline / up。這個問題的緣由在於 查詢應用程序的狀態和信息超時，下面給出兩種解決方案：
#方法一：增長超時時間（單位:ms）
spring.boot.admin.monitor.read-timeout=20000
#方法二：關閉閉未使用或不重要的檢查點
management.health.db.enabled=false
management.health.mail.enabled=false
management.health.redis.enabled=false
management.health.mongo.enabled=false
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2. 自定義通知
能夠經過添加實現Notifier接口的Spring Beans來添加您本身的通知程序，最好經過擴展 AbstractEventNotifier或AbstractStatusChangeNotifier。在sc-admin-server工程中編寫一個自定義的通知器：
@Component
public class CustomNotifier extends AbstractStatusChangeNotifier {
private static final Logger LOGGER = LoggerFactory.getLogger( LoggingNotifier.class);
public CustomNotifier(InstanceRepository repository) {
super(repository);
}
@Override
protected Mono<Void> doNotify(InstanceEvent event, Instance instance) {
return Mono.fromRunnable(() -> {
if (event instanceof InstanceStatusChangedEvent) {
LOGGER.info("Instance {} ({}) is {}", instance.getRegistration().getName(), event.getInstance(),
((InstanceStatusChangedEvent) event).getStatusInfo().getStatus());
String status = ((InstanceStatusChangedEvent) event).getStatusInfo().getStatus();
switch (status) {
// 健康檢查沒經過
case "DOWN":
System.out.println("發送 健康檢查沒經過 的通知！");
break;
// 服務離線
case "OFFLINE":
System.out.println("發送 服務離線 的通知！");
break;
//服務上線
case "UP":
System.out.println("發送 服務上線 的通知！");
break;
// 服務未知異常
case "UNKNOWN":
System.out.println("發送 服務未知異常 的通知！");
break;
default:
break;
}
} else {
LOGGER.info("Instance {} ({}) {}", instance.getRegistration().getName(), event.getInstance(),
event.getType());
}
});
}
}
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