Spring Boot not picking up properties from application.properties - spring-boot

Question

I have a small spring-boot application, where I am trying to pickup properties from application.properties into my #Component class.
However, I get the following error
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'bucket4jRateLimiterV2' defined in file [/Users/npatira/Documents/workspace-spring-tool-suite-4-4.15.3.RELEASE/assessment/target/classes/com/nishit/ninesixteen/listener/Bucket4jRateLimiterV2.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.nishit.ninesixteen.listener.Bucket4jRateLimiterV2]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: 0 is wrong value for period tokens, because tokens should be positive
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1334)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1232)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1391)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1311)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:656)
... 34 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.nishit.ninesixteen.listener.Bucket4jRateLimiterV2]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: 0 is wrong value for period tokens, because tokens should be positive
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:224)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:87)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1326)
... 45 common frames omitted
Caused by: java.lang.IllegalArgumentException: 0 is wrong value for period tokens, because tokens should be positive
at io.github.bucket4j.BucketExceptions.nonPositivePeriodTokens(BucketExceptions.java:106)
at io.github.bucket4j.Refill.<init>(Refill.java:46)
at io.github.bucket4j.Refill.intervally(Refill.java:108)
at com.nishit.ninesixteen.listener.Bucket4jRateLimiterV2.<init>(Bucket4jRateLimiterV2.java:24)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:211)
... 47 common frames omitted
My interpretation of this error is that it has not been able to pick up either the value from application.properties or the default value assigned.
Below is the code for the Component.
#Component
public class Bucket4jRateLimiterV2 {
#Value("${ratelimit:100}")
private int throttleRate;
#Value("${thrrotleDuration:1}")
private int refillDuration;
private Refill refill;
private Bandwidth limit;
private Bucket BUCKET;
public Bucket4jRateLimiterV2() {
System.out.println("Values are : " + throttleRate + " " + refillDuration);
refill = Refill.intervally(throttleRate, Duration.ofMinutes(refillDuration));
limit = Bandwidth.classic(5, refill);
BUCKET = Bucket4j.builder().addLimit(limit).build();
}
public boolean isAPICallAllowed() {
System.out.println("thrrotleRate : " + throttleRate);
System.out.println("Available tokens are : " + BUCKET.getAvailableTokens() + " called from thread : "
+ Thread.currentThread().getName());
return BUCKET.tryConsume(TOKEN_COUNT);
}
}
This gave an output
Values are : 0 0
which means the int were initialized without picking up the value from the properties file.
and this is how my application.properties looks
ratelimit = 500
throttleDuration = 1
My main class has the following annotations.
#EnableAsync
#SpringBootApplication
#ComponentScan(basePackages = "com.nishit")
#EnableCaching(proxyTargetClass = true)
What have I tried?
I first thought that application.properties is not in my classpath. Verified that.
I tried #Component, #Service, #Controller in all these annotations, to see if the property gets picked up somewhere.
Any idea of what it is that I have done wrong?

Answer 1

try,This works with here as well.