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SonaType Nexus
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-> Nexus is an Open Source Software (OSS) & It is free.

-> It is used as Artifactory Repository server.

-> It is used to store project build artifacts.
		
		Ex: jar, war etc.

Note: Project artifacts will be stored in artifactory repository server for backup purpose.		

-> Nexus software developed using java language.

-> The current version of nexus is 3.x

Note : The alternate for nexus is JFrog.

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Q) What is difference between Nexus repo and GitHub repo ?
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-> Github is a SCM software which is used to store source code of the project.

-> Nexus is an Artifact Repository server which is used to store build artifacts (jar / war).


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Nexus Setup
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Git Repo : https://github.com/ashokitschool/DevOps-Documents/blob/main/07-Nexus-Setup-Docker.md


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Working with Nexus Repository
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=> In nexus server, we can create 2 types of repositories to store project artifacts.

		1) snapshot repository

		2) release repository

-> If project is under development then that project build artifacts will be stored into snapshot repository.

-> If project development completed and released to production then that project build artifacts will be stored to release repository.


Note: Based on <version/> name available in project pom.xml file it will decide artifacts should be stored into which repository.


<version>0.0.1-SNAPSHOT</version> => It will go to snapshot repository

<version>RELEASE-1.0</version> => It will go release repository


-> Create Repositories by selecting "Maven 2 (Hosted)"

		- select policy


-> After repositories created note down repo urls like below

	Snapshot repo url : http://3.108.191.58:8081/repository/ashokit-snapshot-repo/

	Release repo url : http://3.108.191.58:8081/repository/ashokit-release-repo/


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Integrate Nexus Server Repos in our Maven Project
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## Step-1:  Nexus Repos details we will configure in project pom.xml file like below

  <distributionManagement> 

		<repository>
			<id>nexus</id>
			<name>Ashok IT Releases Nexus Repo</name>
			<url>http://3.108.191.58:8081/repository/ashokit-release-repo/</url>
		</repository>
		
		<snapshotRepository>
			<id>nexus</id>
			<name>Ashok IT Snapshots Nexus Repo</name>
			<url>http://3.108.191.58:8081/repository/ashokit-snapshot-repo/</url>
		</snapshotRepository>	

  </distributionManagement>

## Step-2: We need to configure Nexus Server Credentials in Maven "settings.xml" file  

		Maven settings.xml file Location : C:\apache-maven-3.8.5\conf

-> In settings.xml file, under <servers> tag add below <server> tag

	<server>
		<id>nexus</id>
		<username>admin</username>
		<password>admin@321</password>
	</server>		


## Step-3:  Once these details are configured then we can run below maven goal to upload build artifacts to Nexus Server

	$ mvn clean deploy

Note: When we execute maven deploy goal, internally it will execute 'compile + test + package + install + deploy' goals.