[CAMEL-8482] Camel requires restart of Spring applicationcontext to fetch new values for properties managed by Spring Cloud

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Cannot Reproduce
• Affects Version/s: 2.15.0
• Component/s: camel-spring-boot
• Estimated Complexity: Unknown
• Assignee: Henryk Konsek
• Reporter: Manuel Rivas
• Created: 13/Mar/15 14:06
• Updated: 12/May/15 15:37
• Resolved: 12/May/15 15:37

Description

When having a camel route builder making use of a property managed by spring cloud config server, the beans in the application managed by Spring get the property values refreshed when invoking the Spring cloud config RefreshEndpoint but the camel routebuilders does not pick up the new values. Restarting the camel context does not help either. Restart of Spring application context is required.

Example that works for Spring managed beans:

package se.comhem.service;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.stereotype.Component;

@Component
@RefreshScope()
public class CosmosProperties {

@Value("${cosmos.someappconf}")
private String someAppConf;

public String getSomeAppConf()

{ return someAppConf; }

}

When using this bean together with a camel routebuilder it does not work until Spring Application context is restarted:

package se.comhem.service;

import org.apache.camel.model.language.SimpleExpression;
import org.apache.camel.spring.SpringRouteBuilder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class ConfigClientRouteBuilder extends SpringRouteBuilder {
pansowa
private final static String URI = "servlet:///testCamel";

@Autowired
private CosmosProperties cosmosProperties;

@Override
public void configure() throws Exception

{ from(URI) .setBody(new SimpleExpression(cosmosProperties.getSomeAppConf())) .to("log:se.comhem?level=INFO&showBody=true&multiline=true") .end(); }

}

Main application class:

package se.comhem.service;

import org.apache.camel.component.servlet.CamelHttpTransportServlet;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.context.embedded.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@Configuration
@EnableAutoConfiguration
@RestController
@ComponentScan
public class Application {

private static final String CAMEL_URL_MAPPING = "/camel/*";
private static final String CAMEL_SERVLET_NAME = "CamelServlet";

@Autowired
private CosmosProperties cosmosProperties;

@RequestMapping("/")
public String home()

{ return "Config client running correctly"; }

public static void main( String[] args )

{ SpringApplication.run(Application.class, args); }

@RequestMapping("/some-app-conf")
public String someAppConf()

{ return "Some app conf " + this.cosmosProperties.getSomeAppConf(); }

@Bean
public ServletRegistrationBean servletRegistrationBean()

{ ServletRegistrationBean registration = new ServletRegistrationBean(new CamelHttpTransportServlet(), CAMEL_URL_MAPPING); registration.setName(CAMEL_SERVLET_NAME); return registration; }

}

Bootstrap configuration

spring:
boot:
admin:
url: http://localhost:8880
application:
name: config-client
config:
name: config-client
profiles:
active: ${environment}
cloud:
config:
uri: http://localhost:8110
enabled: true
failFast: true

pom:

<?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>

<groupId>se.comhem.service</groupId>
<artifactId>config-client</artifactId>
<version>1.0-SNAPSHOT</version>

<properties>
<org.springframework.version>4.1.5.RELEASE</org.springframework.version>
<camel.version>2.15.0</camel.version>
<java.version>1.8</java.version>
</properties>

<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-parent</artifactId>
<version>1.0.0.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>

<dependencies>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>log4j-over-slf4j</artifactId>
</exclusion>
</exclusions>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jetty</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter</artifactId>
</dependency>

<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-starter-admin-client</artifactId>
<version>1.1.2</version>
</dependency>

<dependency>
<groupId>se.comhem.common</groupId>
<artifactId>decrypt</artifactId>
<version>1.0.0</version>
</dependency>

<!-- Camel -->
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-core</artifactId>
<version>${camel.version}</version>
<exclusions>
<exclusion>
<artifactId>slf4j-api</artifactId>
<groupId>org.slf4j</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-spring-boot</artifactId>
<version>${camel.version}</version>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-servlet</artifactId>
<version>${camel.version}</version>
</dependency>

</dependencies>

<build>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>

<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.2</version><!-$NO-MVN-MAN-VER$->
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-source-plugin</artifactId>
<executions>
<execution>
<id>attach-sources</id>
<phase>verify</phase>
<goals>
<goal>jar-no-fork</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>

</project>

Issue Links

• is duplicated by: CAMEL-8460 camel-spring-boot - Routes restart during startup