Merge pull request #6988 from j7-juarez/BAEL-2908
BAEL-2908 lazy initialization with spring boot 2.2
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rpvilao
GitHub
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This is a parent module for projects that want to take advantage of the latest Spring Boot improvements/features.
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<artifactId>parent-boot-performance</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<name>parent-boot-performance</name>
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<packaging>pom</packaging>
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<description>Parent for all modules that want to take advantage of the latest Spring Boot improvements/features. Current version: 2.2</description>
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<parent>
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<groupId>com.baeldung</groupId>
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<artifactId>parent-modules</artifactId>
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<version>1.0.0-SNAPSHOT</version>
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</parent>
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<properties>
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<rest-assured.version>3.1.0</rest-assured.version>
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<!-- plugins -->
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<thin.version>1.0.21.RELEASE</thin.version>
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<spring-boot.version>2.2.0.M3</spring-boot.version>
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</properties>
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<dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-dependencies</artifactId>
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<version>${spring-boot.version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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</dependencies>
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</dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>io.rest-assured</groupId>
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<artifactId>rest-assured</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<pluginManagement>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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<version>${spring-boot.version}</version>
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<configuration>
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<mainClass>${start-class}</mainClass>
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<!-- this is necessary as we're not using the Boot parent -->
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</configuration>
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</plugin>
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</plugins>
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</pluginManagement>
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</build>
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<repositories>
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<repository>
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<id>spring-milestones</id>
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<name>Spring Milestones</name>
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<url>https://repo.spring.io/milestone</url>
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</repository>
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</repositories>
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<profiles>
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<profile>
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<id>thin-jar</id>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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<dependencies>
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<!-- The following enables the "thin jar" deployment option. -->
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<dependency>
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<groupId>org.springframework.boot.experimental</groupId>
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<artifactId>spring-boot-thin-layout</artifactId>
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<version>${thin.version}</version>
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</dependency>
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</dependencies>
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</plugin>
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</plugins>
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</build>
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</profile>
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</profiles>
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</project>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<artifactId>spring-boot-performance</artifactId>
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<name>spring-boot-performance</name>
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<packaging>war</packaging>
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<description>This is a simple Spring Boot application taking advantage of the latest Spring Boot improvements/features. Current version: 2.2</description>
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<parent>
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<artifactId>parent-boot-performance</artifactId>
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<groupId>com.baeldung</groupId>
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<version>0.0.1-SNAPSHOT</version>
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<relativePath>../parent-boot-performance</relativePath>
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</parent>
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<properties>
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<!-- The main class to start by executing java -jar -->
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<start-class>com.baeldung.lazyinitialization.Application</start-class>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter</artifactId>
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</dependency>
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</dependencies>
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<build>
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<finalName>spring-boot-performance</finalName>
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<resources>
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<resource>
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<directory>src/main/resources</directory>
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<filtering>true</filtering>
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</resource>
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</resources>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-war-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>
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package com.baeldung.lazyinitialization;
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import com.baeldung.lazyinitialization.services.Writer;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.context.ApplicationContext;
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import org.springframework.context.annotation.Bean;
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@SpringBootApplication
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public class Application {
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@Bean("writer1")
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public Writer getWriter1() {
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return new Writer("Writer 1");
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}
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@Bean("writer2")
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public Writer getWriter2() {
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return new Writer("Writer 2");
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}
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public static void main(String[] args) {
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ApplicationContext ctx = SpringApplication.run(Application.class, args);
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System.out.println("Application context initialized!!!");
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Writer writer1 = ctx.getBean("writer1", Writer.class);
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writer1.write("First message");
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Writer writer2 = ctx.getBean("writer2", Writer.class);
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writer2.write("Second message");
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}
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}
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package com.baeldung.lazyinitialization.services;
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public class Writer {
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private final String writerId;
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public Writer(String writerId) {
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this.writerId = writerId;
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System.out.println(writerId + " initialized!!!");
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}
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public void write(String message) {
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System.out.println(writerId + ": " + message);
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}
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}
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spring:
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main:
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lazy-initialization: true
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