Build Tools

Materials

• Download Maven
• Maven Installation

Practice

Task 1

1. Find root pom.xml in stage-2-module-1-build-tools-maven project. Now it looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>stage-2-module-1-build-tools-maven</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>utils</module>
        <module>demo</module>
    </modules>

    <properties>
        <junit.version>5.8.1</junit.version>
        <maven.jar.plugin.version>2.2</maven.jar.plugin.version>
        <maven.compiler.plugin.version>2.2</maven.compiler.plugin.version>
        <maven.surefire.plugin.version>2.22.2</maven.surefire.plugin.version>
    </properties>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.junit.jupiter</groupId>
                <artifactId>junit-jupiter-engine</artifactId>
                <version>${junit.version}</version>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>org.junit.jupiter</groupId>
                <artifactId>junit-jupiter-params</artifactId>
                <version>${junit.version}</version>
                <scope>test</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>${maven.surefire.plugin.version}</version>
            </plugin>
            <plugin>
<!--                add something here-->
            </plugin>
        </plugins>
    </build>
</project>

• Add something to plugin section and make sure it is compatible with java 8

Task 2

Custom jar utils-1.3.5.jar will be created with the following instructions:

• The jar should contain class StringUtils with method boolean isPositiveNumber(String str).
• Apache Commons Lang 3.10 library is used to implement this method.

1. Find pom.xml in 'utils' and fill it with proper groupId, artifactId and Apache Commons Lang 3.10 (or higher) dependency

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <artifactId>stage-2-module-1-build-tools-maven</artifactId>
        <groupId>org.example</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    
    <groupId> <!-- something should be here--></groupId>
    <artifactId> <!-- something should be here--></artifactId>
    <version> <!-- something should be here--></version>

    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
        <!-- something should be here-->
        
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-params</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
        </dependency>
    </dependencies>
</project>

2. Implement method in StringUtils.class:

public class StringUtils {
    public static boolean isPositiveNumber(String str) {
        //here magic will happen
    }
}

Task 3

Now we will use the created util class:

1. Find pom.xml in 'demo' and fill in everything that is missed:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>stage-2-module-1-build-tools-maven</artifactId>
        <groupId>org.example</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>demo</artifactId>
    <dependencies>
        <!-- something should be here-->
        
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-params</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

2. Provide required implementation:

public class Utils {
    public static boolean isAllPositiveNumbers(List<String> args) {
       //magic happens here
    }
}

Task 4

Make sure that application passes all test suits.