iamitshri

// Get annotations on the class object
Annotation[] annotations = classobject.getClass()
                                     .getAnnotations();
for (Annotation annotation : annotations) {
            log.debug("annotation type: {}", annotation.annotationType());
            Class<? extends Annotation> type = annotation.annotationType();
            for (Method method : type.getDeclaredMethods()) {
                Object val = method.invoke(annotation, (Object[]) null);
                log.debug("method name: {}, return value:{} return type:{}", method.getName(), val, val.getClass()
                                                                                                       .getName());

iamitshri

package edu.wgu.dm.config;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import javax.servlet.http.HttpServletResponse;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.ResponseStatus;

iamitshri

package edu.wgu.dm.datagenerator;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Future;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;

iamitshri

 
spring.datasource.url=jdbc:mysql://host:3306/dbname?autoReconnect=true&useSSL=false&zeroDateTimeBehavior=convertToNull&useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
spring.datasource.username=username
spring.datasource.password=password

spring.jpa.show-sql=true
spring.jpa.properties.hibernate.format_sql=true

spring.jpa.generate-ddl=true
spring.jpa.hibernate.ddl-auto=none

iamitshri

Efficient JPA Querying

• Use join fetch
• Named Entity Graphs https://blog.ippon.tech/boost-the-performance-of-your-spring-data-jpa-application/
  • graph definition can be on the query
  • graph definition can be on the entity so that other methods can re use it.
  • Annotation Named Entity : Used to specify the path and boundaries for a find operation or query.
• Use appropriate fetch types (lazy or eager)

MultipleBagFetchException

• Caused by: org.hibernate.loader.MultipleBagFetchException: cannot simultaneously fetch multiple bags: [com.jpa.experiments.entity.TaskEntity.aspects, com.jpa.experiments.entity.AspectEntity.anchors]

iamitshri

@Component
@Data
@ConfigurationProperties(prefix = "config.demo")
@Validated
public class ConfigPropertiesDemo {
    int numTests;
    @Size(min=3)
    String name;
    float expense;
    boolean booleanYes;

iamitshri

<?xml version="1.0" encoding="UTF-8"?>
<configuration>

	

	<property name="logPattern"
		value="%d %-5level %logger{35} - %msg%n" />
	<property name="logEncoding" value="UTF-8" />
	<property name="logDirectory" value="logs" />

iamitshri

    private void getFile() throws IOException {
        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        List<Resource> files = Arrays.asList(resolver.getResources("classpath*:folder-name"));
        for(Resource file : files) {
            for(File file1 : file.getFile().listFiles()) {
                 
            }
        }

iamitshri

package com.amit;

import org.apache.commons.lang3.time.StopWatch;
import lombok.extern.slf4j.Slf4j;

/**
 * Hello world!
 *
 */

iamitshri

<h1>
  This link helps to quickly create a sample spring boot project
</h1>


https://start.spring.io/starter.zip?name=autoTestExperiment&groupId=edu.wgu.ema&artifactId=autoTestExperiment&version=0.0.1-SNAPSHOT&description=Demo+project+for+Spring+Boot&packageName=edu.wgu.ema.katas&type=maven-project&packaging=jar&javaVersion=1.8&language=java&bootVersion=1.5.19.RELEASE&dependencies=lombok&dependencies=configuration-processor&dependencies=devtools&dependencies=mysql&dependencies=data-jpa&dependencies=web

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