I have a standard springboot web app. I want to load properties file that's not in the classpath. application.properties is in the classpath and is being read correctly.
I don't have an issue when I'm building a jar. I just put the .properties alongside the jar and it works. But when I package a war, I couldn't get the application to read the properties file .
You put the properties file parallel to application.properties file and load it in a class like this:
#PropertySource("classpath:foo.properties")
public class My class {
#Value( "${some.property}" )
String myProp;
}
You can using ClassPathResource. given Class for loading resources.
This is sample code for you
ClassPathResource resource = new ClassPathResource("/application/context/blabla.yml");
InputStream inputStream = resource.getInputStream();
File file = resource.getFile();
// using inputStream or file
ClassPathResource
You can use spring application.properties to have spring profiles and use the spring profiles to define separate properties for each environment as you like.You can even separate out the spring profiles in to different files like appication-dev.properties etc so that you can have each spring profile in different files.
You can read the properties by using #Configuration annotation :
#Configuration
#EnableConfigurationProperties(TestProperties.class)
public class MySampleConfiguration {
}
Here TestProperties.class is used to map the values from the property file or yaml .
Reference in detail : https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html
Related
In spring boot application how do I give an external windows path using #Value Spring annotation and Resource
The below example works fine that look into resources folder but I want to give the path outside of application like c:\data\sample2.csv
#Value("classPath:/sample2.csv")
private Resource inputResource;
...
#Bean
public FlatFileItemReader<Employee> reader() {
FlatFileItemReader<Employee> itemReader = new FlatFileItemReader<Employee>();
itemReader.setLineMapper(lineMapper());
itemReader.setLinesToSkip(1);
itemReader.setResource(inputResource);
and if I want to get the value from properties file in annotaion, whats the format to put the path in windows?
i tried these, none of them worked:
in code
#Value("${inputfile}")
in properties file:
inputfile="C:\Users\termine\dev\sample2.csv"
inputfile="\\C:\\Users\\termine\\dev\\sample2.csv"
inputfile="C:/Users/termine/dev/sample2.csv"
inputfile="file:\\C:\Users\termine\dev\sample2.csv"
inputfile="file://C://Users//termine///dev//sample2.csv"
When you use classpath spring will try to search with the classpath even if you provide the outside file path.
so instead of using classpath: you can use file:
Ex.
#Value("file:/sample2.csv") //provide full file path if any
Use the key spring.config.location in properties to set the config location. Spring-boot will by default load properties from the locations, with precedence like below :
A /config subdir of the current directory.
The current directory
A classpath /config package
The classpath root
and apart from this when you start the jar or in application.properties you can provide the location of the config file like :
$ java -jar myproject.jar --spring.config.location=classpath:/default.properties,classpath:/override.properties
You can serve static files from the local disk, by making the resource(s) "sample2.csv" as a static resource. An easy way to do this is by adding spring.resources.static-locations configuration to your applicaiton.properties file. Example:
spring.resources.static-locations=file:///C:/Temp/whatever/path/sample2.csv",classpath:/static-files, classpath:/more-static-resource
When I did this in one of the projects, I was able to access the file form the browser using localhost:8080/sample2.csv.
I have two configuration files that have to be read using spring boot application, however, only the first configuration property file is resolved (external_application.properties) , later one (queries_config.properties) is not getting detected any issue in passing in the command line.
java -Dexternal.app.properties=file:external_application.properties -Dqueries.config.properties=file:queries_config.properties -jar testsnapshot.jar
If you are using spring boot so you can use
java
-Dspring.config.location=file:external_application.properties,file:queries_config.properties
source
I did like below which resolved over all problem..
java -Dspring.config.location=classpath:file:///C:\Users\configfiles\ -jar testsnapshot.jar
secondly to lookup for external config
#Component
#PropertySource(value = "${spring.config.location}queries_config-${spring.profiles.active}.properties")
#ConfigurationProperties("query")
public class QueriesConfig {
}
#Component
#PropertySource(value = "${spring.config.location}external_application-${spring.profiles.active}.properties")
#ConfigurationProperties("query")
public class ExternalConfig {
}
I can't find an answer to this question on stackoverflow hence im asking here so I could get some ideas.
I have a Spring Boot application that I have deployed as a war package on Tomcat 8. I followed this guide Create a deployable war file which seems to work just fine.
However the issue I am currently having is being able to externalize the configuration so I can manage the configuration as puppet templates.
In the project what I have is,
src/main/resources
-- config/application.yml
-- config/application.dev.yml
-- config/application.prod.yml
-- logback-spring.yml
So how can I possibly load config/application.dev.yml and config/application.prod.yml externally and still keep config/application.yml ? (contains default properties including spring.application.name)
I have read that the configuration is load in this order,
A /config subdirectory of the current directory.
The current directory
A classpath /config package
The classpath root
Hence I tried to load the configuration files from /opt/apache-tomcat/lib to no avail.
What worked so far
Loading via export CATALINA_OPTS="-Dspring.config.location=/opt/apache-tomcat/lib/application.dev.yml"
however what I would like to know is,
Find out why loading via /opt/apache-tomcat/lib classpath doesn't work.
And is there a better method to achieve this ?
You are correct about load order. According to Spring boot documentation
SpringApplication will load properties from application.properties files in the following locations and add them to the Spring Environment:
A /config subdirectory of the current directory.
The current directory
A classpath /config package
The classpath root
The list is ordered by precedence (properties defined in locations higher in the list override those defined in lower locations).
[Note]
You can also use YAML ('.yml') files as an alternative to '.properties'.
This means that if you place your application.yml file to /opt/apache-tomcat/lib or /opt/apache-tomcat/lib/config it will get loaded.
Find out why loading via /opt/apache-tomcat/lib classpath doesn't work.
However, if you place application.dev.yml to that path, it will not be loaded because application.dev.yml is not filename Spring is looking for. If you want Spring to read that file as well, you need to give it as option
--spring.config.name=application.dev or -Dspring.config.name=application.dev.
But I do not suggest this method.
And is there a better method to achieve this ?
Yes. Use Spring profile-specific properties. You can rename your files from application.dev.yml to application-dev.yml, and give -Dspring.profiles.active=dev option. Spring will read both application-dev.yml and application.yml files, and profile specific configuration will overwrite default configuration.
I would suggest adding -Dspring.profiles.active=dev (or prod) to CATALINA_OPTS on each corresponding server/tomcat instance.
I have finally simplified solution for reading custom properties from external location i.e outside of the spring boot project. Please refer to below steps.
Note: This Solution created and executed windows.Few commands and folders naming convention may vary if you are deploying application on other operating system like Linux..etc.
1. Create a folder in suitable drive.
eg: D:/boot-ext-config
2. Create a .properties file in above created folder with relevant property key/values and name it as you wish.I created dev.properties for testing purpose.
eg :D:/boot-ext-config/dev.properties
sample values:
dev.hostname=www.example.com
3. Create a java class in your application as below
------------------------------------------------------
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.PropertySource;
#PropertySource("classpath:dev.properties")
#ConfigurationProperties("dev")
public class ConfigProperties {
private String hostname;
//setters and getters
}
--------------------------------------------
4. Add #EnableConfigurationProperties(ConfigProperties.class) to SpringBootApplication as below
--------------------------------------------
#SpringBootApplication
#EnableConfigurationProperties(ConfigProperties.class)
public class RestClientApplication {
public static void main(String[] args) {
SpringApplication.run(RestClientApplication.class, args);
}
}
---------------------------------------------------------
5. In Controller classes we can inject the instance using #Autowired and fetch properties
#Autowired
private ConfigProperties configProperties;
and access properties using getter method
System.out.println("**********hostName******+configProperties.getHostName());
Build your spring boot maven project and run the below command to start application.
-> set SPRING_CONFIG_LOCATION=<path to your properties file>
->java -jar app-name.jar
I'm trying to convert a traditional Tomcat Spring MVC webapp to Spring Boot. The new application should still use .war deployment.
For various reasons I have the obligatory requirement that the application.properties file resides inside a WEB-INF/conf folder in the deployed app and NOT inside the WEB-INF/classes folder where Spring Boot puts it by default.
In the original webapp I could put the application.properties file inside the src/main/webapp/WEB-INF/conf folder (so they get copied to WEB-INF/conf in the deployed application) and then use it like this:
<context:property-placeholder location="/WEB-INF/conf/application.properties"/>
What is the Spring Boot way to refer to this location?
I tried adding each of the following:
spring.config.location=WEB-INF/conf/application.properties
but my application.properties file still doesn't get loaded.
What finally worked was the following #PropertySource annotation.
#SpringBootApplication
#PropertySource(value = {"WEB-INF/conf/application.properties"})
public class MyApplication {
public static void main(String[] args) {
SpringApplication.run(MyApplication.class, args);
}
}
It seems that not specifying classpath: or file: at the beginning of a path makes it use a path relative to the webapp.
I'm still not sure as to why specifying
spring.config.location=WEB-INF/conf/application.properties
didn't have the same effect.
I would like externalize the configuration of my aplication, I use Spring Boot 1.3.0, and I kwnow that the class ConfigFileApplicationListener has a default value DEFAULT_SEARCH_LOCATIONS. How can I change the source of my configuration, before this class load the default properties source?
You can use #PropertySource annotation on your configuration class (which is annotated #SpringBootApplication or #Configuration).
Like this:
#SpringBootApplication
#PropertySource(value = { "classpath:other.properties", "file:./other-external.properties" }, ignoreResourceNotFound = true)
public class MyApplication {
It will search first other.properties in your classpath and then looks the external file other-external.properties right outside of your jar or war file. Latest files overwrites values of other files (if they exists)
See https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html for more details.