How to convert spring-boot-web-application to spring application - spring

Question

I'm following this spring-data-aerospike tutorial and setup the sample application and it is working fine.
Now I want to convert this spring boot application to spring application so I wrote the below code.
package com.aerospike.demo.simplespringbootaerospikedemo;
import com.aerospike.demo.simplespringbootaerospikedemo.configuration.AerospikeConfiguration;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.data.aerospike.core.AerospikeTemplate;
public class TestSpringConfig {
public static void main(String[] args) throws IOException {
ApplicationContext ctx = new AnnotationConfigApplicationContext(AerospikeConfiguration.class);
AerospikeTemplate template = ctx.getBean(AerospikeTemplate.class);
}
}
18:33:25.430 [main] WARN org.springframework.context.annotation.AnnotationConfigApplicationContext - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'aerospikeTemplate' defined in com.aerospike.demo.simplespringbootaerospikedemo.configuration.AerospikeConfiguration: Unsatisfied dependency expressed through method 'aerospikeTemplate' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'aerospikeClient' defined in com.aerospike.demo.simplespringbootaerospikedemo.configuration.AerospikeConfiguration: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.aerospike.client.AerospikeClient]: Factory method 'aerospikeClient' threw exception; nested exception is com.aerospike.client.AerospikeException$Connection: Error -8: Failed to connect to host(s):
null 0 Error -8: java.net.ConnectException: Can't assign requested address (connect failed)
org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800)
org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:541)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1334)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:564)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524)
org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:944)
org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:917)
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:582)
org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:93)
com.aerospike.demo.simplespringbootaerospikedemo.TestSpringConfig.main(TestSpringConfig.java:10)
So I did tweak the code liitle bit like below to set the properties into system -
import com.aerospike.demo.simplespringbootaerospikedemo.configuration.AerospikeConfiguration;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.data.aerospike.core.AerospikeTemplate;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import java.util.stream.Stream;
public class TestSpringConfig {
public static void main(String[] args) throws IOException {
System.out.println(ClassLoader.getSystemResourceAsStream("application.properties").available());
Properties props = new Properties();
InputStream resourceAsStream = ClassLoader.getSystemResourceAsStream("application.properties");
if (resourceAsStream != null) {
props.load(resourceAsStream);
}
if(props != null) {
System.setProperties(props);
}
try {
ApplicationContext ctx = new AnnotationConfigApplicationContext(AerospikeConfiguration.class);
AerospikeTemplate template = ctx.getBean(AerospikeTemplate.class);
} catch (Exception e) {
StackTraceElement[] st = e.getStackTrace();
if(st != null) {
System.out.println("st.length = " + st.length);
}
Stream.of(st).forEach(System.out::println);
} catch (ExceptionInInitializerError e) {
System.out.println(e.getCause());
e.getCause().printStackTrace();
}
}
}
When I run the program with the changes above I get the below stack trace for e.getCause().printStackTrace() -
java.lang.NullPointerException
at ch.qos.logback.core.CoreConstants.<clinit>(CoreConstants.java:47)
at ch.qos.logback.classic.layout.TTLLLayout.doLayout(TTLLLayout.java:52)
at ch.qos.logback.classic.layout.TTLLLayout.doLayout(TTLLLayout.java:23)
at ch.qos.logback.core.encoder.LayoutWrappingEncoder.encode(LayoutWrappingEncoder.java:115)
at ch.qos.logback.core.OutputStreamAppender.subAppend(OutputStreamAppender.java:230)
at ch.qos.logback.core.OutputStreamAppender.append(OutputStreamAppender.java:102)
at ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:84)
at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:51)
at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:270)
at ch.qos.logback.classic.Logger.callAppenders(Logger.java:257)
at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:421)
at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:383)
at ch.qos.logback.classic.Logger.log(Logger.java:765)
at org.apache.commons.logging.LogAdapter$Slf4jLocationAwareLog.debug(LogAdapter.java:468)
at org.springframework.context.support.AbstractApplicationContext.prepareRefresh(AbstractApplicationContext.java:628)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
at org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:93)
at com.aerospike.demo.simplespringbootaerospikedemo.TestSpringConfig.main(TestSpringConfig.java:26)
I'm running out of the the available options. How to fix this error.
The code is on github here

Answer 1

I added line.separator=\n to the application.properties which fixed the issue