CODEWITHSUNDEEP
javamavengeoip
2Big2BeSmall
2Big2BeSmall

Reputation: 1378

What is the difference between the GeoIP2 MaxMind pom and my local one?

I'm following this guide:

https://github.com/maxmind/GeoIP2-java

It says:

We recommend installing this package with Maven. To do this, add the dependency to your pom.xml:

<dependency>
    <groupId>com.maxmind.geoip2</groupId>
    <artifactId>geoip2</artifactId>
    <version>2.2.0</version>
</dependency>

There is also pom.xml file in the Git repository of GeoIP2 which is much longer - what is the difference between them?

Upvotes: 0

Views: 301

Answers (1)

Magnilex
Magnilex

Reputation: 11978

Cited from the official homepage:

Apache Maven is a software project management and comprehension tool. Based on the concept of a project object model (POM), Maven can manage a project's build, reporting and documentation from a central piece of information.

Think of the pom.xml as the heart of Maven. In the file you can specify dependencies (most typically jar files), and other information, such as how the project should be built. Without digging to deep into this, one of Maven's strengths is that it manages the dependencies of projects.

To answer your concrete question, GeoIP2 manages its dependencies using Maven. This section of its pom.xml defines them:

<dependencies>
    <dependency>
        <groupId>com.maxmind.db</groupId>
        <artifactId>maxmind-db</artifactId>
        <version>1.0.0</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>com.google.http-client</groupId>
        <artifactId>google-http-client</artifactId>
        <version>1.20.0</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.5.3</version>
    </dependency>
</dependencies>

By using Maven in your own project, you will only need to add the one dependency to GeoIP2. Maven will then search for the dependency in a repository, typically the Maven Central Repository if Maven isn't configured to use another. It will also automatically download all other needed dependencies (transitive dependencies), in this case it would be the dependencies listed above, plus any other dependencies those in turn depend on, and so on.

So, a short recap: Without a dependency management tool like Maven, you would need to manually make sure you have all the correct dependencies on the classpath. Maven fixes this for you.

Upvotes: 2

Related Questions