I am trying to create a AnnotationConfigApplicationContext programmatically. I am getting a list of Configuration classes and a list of property files to go with it in a Spring XML file.
Using that file, I am able to use XmlBeanDefinitionReader and load all #Configuration definitions fine. But, I am not able to load properties.
This is what I am doing to load properties..
PropertiesBeanDefinitionReader propReader = new PropertiesBeanDefinitionReader(ctx);
for (String propFile : propertyFiles) {
propReader.loadBeanDefinitions(new ClassPathResource(propFile));
}
Code just runs through this without any issues, but once I call
ctx.refresh() -- it throws an exception
Caused by: java.lang.IllegalStateException: No bean class specified on bean definition
at org.springframework.beans.factory.support.AbstractBeanDefinition.getBeanClass(AbstractBeanDefinition.java:381)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:54)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:990)
All the classes are available on the classpath, if I just don't load the above properties programmatically application just comes up fine (Because I am using other way to load properties).
Not sure, what I am doing wrong here. Any ideas? Thanks.
I am not sure why you are loading properties manually, but Spring standard for AnnotationConfigApplicationContext is
#Configuration
#PropertySource({"/props1.properties", "/props2.properties"})
public class Test {
...
as for programatic loading, use PropertySourcesPlaceholderConfigurer instead of PropertiesBeanDefinitionReader, this example works OK
#Configuration
public class Test {
#Value("${prop1}") //props1.properties contains prop1=val1
String prop1;
public static void main(String[] args) throws Exception {
AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
ctx.register(Test.class);
PropertySourcesPlaceholderConfigurer pph = new PropertySourcesPlaceholderConfigurer();
pph.setLocation(new ClassPathResource("/props1.properties"));
ctx.addBeanFactoryPostProcessor(pph);
ctx.refresh();
Test test = ctx.getBean(Test.class);
System.out.println(test.prop1);
}
}
prints
val1
Related
I have created one spring boot application, I do not want to keep datasource information in application.properties file as this information will keep on changing. So, All data source information have mentioned in external .txt file. This file is placed outside of project. I am reading this file programmatically. Here is the code,
#SpringBootApplication
public class SpringBootApplicationLuncher {
public static void main(String[] args) throws IOException {
Properties mainProperties = new Properties();
mainProperties.load(new FileInputStream("dbconnection.txt"));
SpringApplication.run(SpringBootApplicationLuncher.class,args);
}
file dbconnection.txt is having below information.
spring.datasource.url=jdbc:mysql://<ip address>:3306/<dbname>
spring.datasource.username=<username>
spring.datasource.password=<password>
When i execute the application, I am getting an error,
Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.
Can anyone please help ?
If you want to pass mainProperties into Spring Boot application, you can use SpringApplicationBuilder for this:
#SpringBootApplication
public class SpringBootApplicationLuncher {
public static void main(String[] args) throws Exception {
Properties mainProperties = new Properties();
mainProperties.load(new FileInputStream("dbconnection.txt"));
new SpringApplicationBuilder()
.sources(SpringBootApplicationLuncher.class)
.properties(mainProperties)
.run(args);
}
}
However Spring Boot already provides a way to externiliaze your configuration, check this documentation for more details
This is how I load application.properties if the file is on the classpath.
#ComponentScan
#Configuration
#PropertySource("classpath:application.properties")
public class MyApplication {
// Have some public methods
}
public class Application {
public static void main(String[] args) {
AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(MyApplication.class);
MyApplication app = context.getBean(MyApplication.class);
// execute methods in app
}
}
We are trying to deploy the application where the properties file is stored externally on a Google Cloud bucket (GCS). I can load the properties file from GCS and save it in memory. How do I pass the properties to the Application context and override the properties loaded from the classpath?
If it matters, it's a standalone app, not Spring Boot.
If you have it in memory then it should not be a problem. Get rid of #PropertySource("classpath:application.properties") annotation and register PropertySourcesPlaceholderConfigurer bean manually.
#Bean
public PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
PropertySourcesPlaceholderConfigurer properties = new PropertySourcesPlaceholderConfigurer();
properties.setLocation([any implementation of Resource interface - use most applicable out of available or implement it by yourself]);
return properties;
}
You can read external properties file following way.
#PropertySources({
#PropertySource("classpath:application.properties"),
#PropertySource(value = "${external.properties}", ignoreResourceNotFound = true)
})
When you run the jar file, pass external.properties filepath following way
java -Dexternal.properties=file:/path_to_properties my-service.jar
I have to load file from outside of my classpath.
The location depends of env properties:
in dev properties I want to load file from resources folder
in prod properties I want to load file from path (/location/file)
What is the best way to do it?
A possible solution is to use configuration properties and the use of Resource. For example, define your properties like this:
#ConfigurationProperties(prefix = "app")
public class SomeProperties {
private Resource file;
// Getters + Setters
}
Then enable your configuration properties by using the #EnableConfigurationProperties annotation on any class, for example your main class:
#SpringBootApplication
#EnableConfigurationProperties(SomeProperties.class)
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
To configure the file location, you can use the following in development:
app.file=classpath:test.txt
And in the production environment you could use:
app.file=file:/usr/local/test.txt
And now you can just autowire the SomeProperties class within any other service. The Resource class has a getFile() method that allows you to retrieve the file, but in addition it contains several other useful methods as well.
So I have read dosens af articles on how to configure Spring boot to be aware of more yml files than application.yml and how to include these - even from subprojects. It is however hard to come by articles describing the same for "pure" Spring. I think however that i'm heading in the right direction I just can't get my configuration values back.
It's a straight forward multi-project gradle build with - for simplicity - two projects. One project is the "main" spring project - ie. Spring Context is initialized in this project. The other is a "support" module with some database entities and datasource configuration. We use annotation based configuration.
I would like to be able to define a set of configuration properties in the support module and based on whatever spring profile is active, the datasource configuration is loaded accordingly.
This SA post got me quite far following the different links in the different answers and composing my solution from this. The structure and code is as follows:
mainproject
src
main
groovy
Application.groovy
resourcers
application.yml
submodule
src
main
groovy
PropertiesConfiguration.groovy
DataSource.groovy
resources
datasource.yml
The PropertiesConfiguration.groovy adds the datasource.yml by using PropertySourcesPlaceholderConfigurer:
#Configuration
class PropertiesConfiguration {
#Bean
public PropertySourcesPlaceholderConfigurer configure() {
PropertySourcesPlaceholderConfigurer configurer = new PropertySourcesPlaceholderConfigurer()
YamlPropertiesFactoryBean yamlPropertiesFactoryBean = new YamlPropertiesFactoryBean()
yamlPropertiesFactoryBean.setResources(new ClassPathResource("datasource.yml"))
configurer.setProperties(yamlPropertiesFactoryBean.getObject())
return configurer
}
}
The Datasource.groovy should then read values based on the spring profile using (code reduced for readability):
#Autowired
Environment env
datasource.username = env.getProperty("datasource.username")
The env.getProperty returns null. No matter what spring profile is active. I can access the configuration value using the #Value annotation, however then the active profile is not respected and it return a value even if it is not defined for that profile. My yml looks (something) like this:
---
spring:
profiles: development
datasource:
username: sa
password:
databaseUrl: jdbc:h2:mem:tests
databaseDriver: org.h2.Driver
I can from Application.groovy inspect my ApplicationContext using a debugger and confirm that my PropertySourcesPlaceholderConfigurer exist and the values are loaded. Inspecting applicationContext.environment.propertySources it is NOT there.
What am I missing?
Using a PropertySourcesPlaceholderConfigurer does not add properties to Environment. Using something like #PropertySource("classpath:something.properties") on the class level of your configuration class will add properties to Environment, but sadly this does not work with yaml-files.
So, you would have to manually add the properties read from the yaml file to your Environment. Here is one way to do this:
#Bean
public PropertySourcesPlaceholderConfigurer config(final ConfigurableEnvironment confenv) {
final PropertySourcesPlaceholderConfigurer configurer = new PropertySourcesPlaceholderConfigurer();
final YamlPropertiesFactoryBean yamlProperties = new YamlPropertiesFactoryBean();
yamlProperties.setResources(new ClassPathResource("datasource.yml"));
configurer.setProperties(yamlProperties.getObject());
confenv.getPropertySources().addFirst(new PropertiesPropertySource("datasource", yamlProperties.getObject()));
return configurer;
}
With this code, you can inject properties in either of these two fashions:
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration(classes = PropertiesConfiguration.class)
public class ConfigTest {
#Autowired
private Environment environment;
#Value("${datasource.username}")
private String username;
#Test
public void props() {
System.out.println(environment.getProperty("datasource.username"));
System.out.println(username);
}
}
With the properties supplied in the question, this will print "sa" two times.
Edit: It doesn't seem that the PropertySourcesPlaceholderConfigurer is actually needed now, so the code can be simplified to the below and still produce the same output.
#Autowired
public void config(final ConfigurableEnvironment confenv) {
final YamlPropertiesFactoryBean yamlProperties = new YamlPropertiesFactoryBean();
yamlProperties.setResources(new ClassPathResource("datasource.yml"));
confenv.getPropertySources().addFirst(new PropertiesPropertySource("datasource", yamlProperties.getObject()));
}
Edit 2:
I see now that you are looking to use the yaml-file with multiple documents in one file, and Spring boot-style selection by profile. It does not seem to be possible using regular Spring. So I think you have to split your yaml files into several, named "datasource-{profile}.yml". Then, this should work (perhaps with some more advanced checking for multiple profiles, etc)
#Autowired
public void config(final ConfigurableEnvironment confenv) {
final YamlPropertiesFactoryBean yamlProperties = new YamlPropertiesFactoryBean();
yamlProperties.setResources(new ClassPathResource("datasource-" + confenv.getActiveProfiles()[0] + ".yml"));
confenv.getPropertySources().addFirst(new PropertiesPropertySource("datasource", yamlProperties.getObject()));
}
Edit 3:
It could also be possible to use functionality from Spring boot without doing a full conversion of your project (I haven't actually tried it on a real project though). By adding a dependency to org.springframework.boot:spring-boot:1.5.9.RELEASE I was able to get it working with the single datasource.yml and multiple profiles, like this:
#Autowired
public void config (final ConfigurableEnvironment confenv) {
final YamlPropertySourceLoader yamlPropertySourceLoader = new YamlPropertySourceLoader();
try {
final PropertySource<?> datasource =
yamlPropertySourceLoader.load("datasource",
new ClassPathResource("datasource.yml"),
confenv.getActiveProfiles()[0]);
confenv.getPropertySources().addFirst(datasource);
} catch (final IOException e) {
throw new RuntimeException("Failed to load datasource properties", e);
}
}
To my surprise I have had a difficult time finding an answer to this question. I have Seen many examples where you can use #PropertySource to load a specific properties file for a class. I have also seen examples where you can easily add different property files in spring boot projects. But what I want to do is to do this for a spring project that is NOT spring boot and load a properties file so that the values of this file can be injected in classes annotated with #Component which is dependent on the server environment. So for example if I am on development server I want a particular properties file loaded and on production a different properties file. The reason that I am doing it like this is because my data and service layers are their own modules. These modules contain their own unit tests and can be imported as their own modules in other spring boot projects. I need properties files to be loaded to serve these modules which use spring but not spring boot. I have tried the following, but this does not work.
#Configuration
#Profile("test")
#EnableJpaRepositories("com.hi.repository")
#EnableTransactionManagement
#EnableScheduling
public class InfrastructureConfig {
...
#Bean
public static PropertySourcesPlaceholderConfigurer placeHolderConfigurer() {
PropertySourcesPlaceholderConfigurer configurer = new PropertySourcesPlaceholderConfigurer();
Map<String, String> env = System.getenv();
String propertiesFile=null;
String e = env.get("SERVER_ENV");
if (e.equals("dev")) {
propertiesFile = "environment/development.properties";
} else if (e.equals("prod")) {
propertiesFile = "environment/production.properties";
}
configurer.setLocation(new ClassPathResource(propertiesFile));
return configurer;
}
Then I have a test which looks like this
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration(locations = {"classpath:/spring/DealServiceTest-context.xml"})
#ActiveProfiles("test")
public class LogTest {
private static final Logger log = LogManager.getLogger(LogTest.class);
#Autowired
PathsService pathsService;
#Autowired
Environment environment;
#Test
public void testBeans(){
System.out.println("********** WASSUP from LogTest");
System.out.println(environment.getProperty("imageBucket"));
}
Although the test prints out null which indicates to me the properties file has not been loaded and prepared for its values to be injected. How can I achieve this?
You don't really need to set properties yourself, but you can do this using spring configuration. Check the documentation: https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html#boot-features-external-config-profile-specific-properties
If you're using spring boot - all you need to do is create multiple properties file for your environments. And only for properties you need to override.
So your main properties file would be at
src/main/resources/application.properties
Production
src/main/resources/application-prod.properties
Development
src/main/resources/application-dev.properties
Testing
src/main/resources/application-test.properties
And then just use the profile name as your environment variable
java -jar -Dspring.profiles.active=prod demo-0.0.1-SNAPSHOT.jar
Actually, you can just use a placeholder in #PropertySource annotation.
See documentation:
Any ${...} placeholders present in a #PropertySource resource location will be resolved against the set of property sources already registered against the environment.
Assuming that placeholder is present in one of the property sources already registered, e.g. system properties or environment variables, the placeholder will be resolved to the corresponding value.
I've made a simple example, it receives a 'property.environment' value to choose, which .properties file should be used as property source. I have two resource files in my classpath - application-test.properties and application-dev.properties, each one contains a 'test.property' value ('test-env' and 'dev-env' respectively).
Property configuration:
#Configuration
#PropertySource("classpath:/config/application-${property.environment}.properties")
public class PropertyConfig {
#Bean
public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer = new PropertySourcesPlaceholderConfigurer();
return propertySourcesPlaceholderConfigurer;
}
}
Component with #Value
#Component
public class TestService {
#Value("${test.property}")
String testProperty;
#PostConstruct
void init() {
System.out.println("---------------------------------------------------------");
System.out.println("Running in " + testProperty + " environment");
System.out.println("---------------------------------------------------------");
}
}
Build command line example (it runs tests with test environment properties)
mvn clean install -DargLine="-Dproperty.environment=test"
Output
---------------------------------------------------------
Running in test-env environment
---------------------------------------------------------
Run command line example
java -jar -Dproperty.environment=dev PATH_TO_YOUR_JAR.jar
Output
---------------------------------------------------------
Running in dev-env environment
---------------------------------------------------------
Don't hard code based on different environment, in spring boot you can able to maintain properties specific environment easily. Refer https://spapas.github.io/2016/03/31/spring-boot-settings/
I would try to take advantage of the profile mechanism already in place in Spring. You basically have done the job yourself already, the only thing you need to change is to have different configurations for "test" and "production" profiles. I prefer to keep everything related to test away from production code (allowing me to place the TestConfig class below in the test source path), so I would probably do something like this:
#Configuration
#Profile("!test")
#PropertySource(value = "classpath:/environment/production.properties")
#Import(AppConfig.class)
public class ProductionConfig
{
// Your production-specific config goes here
}
#Configuration
#Profile("test")
#PropertySource(value = "classpath:/environment/development.properties")
#Import(AppConfig.class)
public class TestConfig
{
// Your test-specific config goes here
}
#Configuration
public class AppConfig
{
// Needed for spring to handle ${property:default} syntax
#Bean
public static PropertySourcesPlaceholderConfigurer propertyConfigIn() {
return new PropertySourcesPlaceholderConfigurer();
}
}
If you prefer to have one config for both cases, you can let the AppConfig import the TestConfig and the ProductionConfig instead, but that will put test code in to production...
Good luck with your project!