For spring boot + integration application, I'm attempting to load configuration from database, allow it to be accessible to Spring's Environment & inject-able via @Value annotation and be override-able by externalized configurations as described in the spring boot reference documentation under the Externalized Configuration Section.
The problem I'm having is that my spring Integration XML contains ${input} property placeholders that can not be resolved, because I can't get the database backed configuration to be loaded before Spring attempts to load the XML configurations.
The entry point to the application:
@SpringBootApplication
public class TestApplication {
public static void main(String[] args) {
SpringApplication.run(TestApplication.class, args);
}
}
How database configuration would be loaded:
@Configuration
public class DbPropertiesConfig {
@Autowired
private org.springframework.core.env.Environment env;
@PostConstruct
public void initializeDatabasePropertySourceUsage() {
MutablePropertySources propertySources = ((ConfigurableEnvironment) env).getPropertySources();
try {
// The below code will be replace w/ code to load config from DB
Map<String,Object> map = new HashMap<>();
map.put("input-dir","target/input");
map.put("output-dir","target/output");
DbPropertySource dbPropertySource = new DbPropertySource("si",map);
propertySources.addLast(dbPropertySource);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
How Spring Integration config is loaded:
@Profile("IN")
@Configuration
@ImportResource({"si-common-context.xml","si-input-context.xml"})
public class SiInputAppConfig {
}
The Spring Integration XML configurationsi-input-context.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/integration"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:int="http://www.springframework.org/schema/integration"
xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:int-file="http://www.springframework.org/schema/integration/file"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/integration
http://www.springframework.org/schema/integration/spring-integration.xsd
http://www.springframework.org/schema/integration/file
http://www.springframework.org/schema/integration/file/spring-integration-file.xsd" default-lazy-init="true">
<int-file:inbound-channel-adapter channel="input2" directory="${input-dir}" filename-pattern="*">
<int:poller fixed-rate="500"/>
</int-file:inbound-channel-adapter>
<int:service-activator input-channel="input2" ref="sampleEndpoint" method="hello" output-channel="output2"/>
<int:channel id="output2"/>
<int-file:outbound-channel-adapter channel="output2" directory="${output-dir}"/>
</beans:beans>
The error I get:
2015-10-28 17:22:18.283 INFO 3816 --- [ main] o.s.b.f.xml.XmlBeanDefinitionReader : Loading XML bean definitions from class path resource [si-common-context.xml]
2015-10-28 17:22:18.383 INFO 3816 --- [ main] o.s.b.f.xml.XmlBeanDefinitionReader : Loading XML bean definitions from class path resource [si-mail-in-context.xml]
2015-10-28 17:22:18.466 INFO 3816 --- [ main] o.s.b.f.config.PropertiesFactoryBean : Loading properties file from URL [jar:file:/C:/Users/xxx/.m2/repository/org/springframework/integration/spring-integration-core/4.1.6.RELEASE/spring-integration-core-4.1.6.RELEASE.jar!/META-INF/spring.integration.default.properties]
2015-10-28 17:22:18.471 INFO 3816 --- [ main] o.s.i.config.IntegrationRegistrar : No bean named 'integrationHeaderChannelRegistry' has been explicitly defined. Therefore, a default DefaultHeaderChannelRegistry will be created.
2015-10-28 17:22:18.604 INFO 3816 --- [ main] o.s.b.f.s.DefaultListableBeanFactory : Overriding bean definition for bean 'beanNameViewResolver': replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; ...
2015-10-28 17:22:18.930 WARN 3816 --- [ main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt
org.springframework.beans.factory.BeanDefinitionStoreException: Invalid bean definition with name 'org.springframework.integration.config.SourcePollingChannelAdapterFactoryBean#0.source' defined in null: Could not resolve placeholder 'si.in-input' in string value "${si.in-input}"; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'input-dir' in string value "${input-dir}" ...
Spring loads DbPropertiesConfig after XML configuration is attempted to be loaded.
How can I resolve this issue?
Thanks in advance
AP
