Release Handle JAR to Maven Central

Sonatype Release requirements

As of 2019, Sonatype has strict validation requirements for all JAR projects. They include:

• Must include the JAR itself
• Must include a "*-sources.jar"
• Must include a "*-javadoc.jar"
• Must include a valid "pom.xml"
• All JARs must be signed (an ".asc" signature file must 

Download Handle Software and Create Release Files

1. Download Handle software distribution package: http://handle.net/download_hnr.html
2. Unzip the distribution package. 
   1. The main "handle-[version].jar" can be found in the "/lib" folder
   2. The "handle-[version]-sources.jar" can be created from the embedded "handle-[version]-src.zip".  Just extract that, and rename it to "handle-[version]-sources.jar"
   3. The "handle-[version]-javadoc.jar" can be created from the "/doc/apidoc" folder. Just extract that, zip it up and rename it to "handle-[version]-javadoc.jar"

3. Create a valid POM for this release. Here's the one created for v9.1.0 (with help from CNRI staff)

   <?xml version="1.0" encoding="UTF-8"?>
   <project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
     <modelVersion>4.0.0</modelVersion>
     <groupId>org.dspace</groupId>
     <artifactId>handle</artifactId>
     <version>9.1.0</version>
     <name>CNRI Handle.net software</name>
     <description>
      	CNRI Handle.net Software (Permission granted for redistribution by Giridhar Manepalli at CNRI)
     </description>
     <url>http://handle.net/</url>
     <dependencies>
       <dependency>
         <groupId>com.google.code.gson</groupId>
         <artifactId>gson</artifactId>
         <version>2.8.2</version>
         <scope>compile</scope>
       </dependency>
       <dependency>
         <groupId>net.cnri</groupId>
         <artifactId>cnriutil</artifactId>
         <version>2.0</version>
         <scope>compile</scope>
       </dependency>
       <dependency>
         <groupId>commons-codec</groupId>
         <artifactId>commons-codec</artifactId>
         <version>1.11</version>
         <scope>compile</scope>
       </dependency>
       <dependency>
         <groupId>org.python</groupId>
         <artifactId>jython</artifactId>
         <version>2.2.1</version>
         <scope>compile</scope>
         <optional>true</optional>
       </dependency>
       <dependency>
         <groupId>org.bouncycastle</groupId>
         <artifactId>bcprov-jdk15on</artifactId>
         <version>1.59</version>
         <scope>compile</scope>
         <optional>true</optional>
       </dependency>
       <dependency>
         <groupId>org.bouncycastle</groupId>
         <artifactId>bcpkix-jdk15on</artifactId>
         <version>1.59</version>
         <scope>compile</scope>
         <optional>true</optional>
       </dependency>
       <dependency>
         <groupId>javax.servlet</groupId>
         <artifactId>javax.servlet-api</artifactId>
         <version>3.0.1</version>
         <scope>compile</scope>
         <optional>true</optional>
       </dependency>
       <dependency>
         <groupId>org.eclipse.jetty.aggregate</groupId>
         <artifactId>jetty-all</artifactId>
         <version>8.1.22.v20160922</version>
         <scope>compile</scope>
         <exclusions>
           <exclusion>
             <artifactId>javax.servlet</artifactId>
             <groupId>org.eclipse.jetty.orbit</groupId>
           </exclusion>
         </exclusions>
         <optional>true</optional>
       </dependency>
       <dependency>
         <groupId>com.sleepycat</groupId>
         <artifactId>je</artifactId>
         <version>7.5.11</version>
         <scope>compile</scope>
         <optional>true</optional>
       </dependency>
       <dependency>
         <groupId>org.hyperic</groupId>
         <artifactId>sigar</artifactId>
         <version>1.6.5.132-7</version>
         <scope>compile</scope>
         <optional>true</optional>
       </dependency>
       <dependency>
         <groupId>junit</groupId>
         <artifactId>junit</artifactId>
         <version>4.12</version>
         <scope>test</scope>
       </dependency>
       <dependency>
         <groupId>org.hamcrest</groupId>
         <artifactId>hamcrest-core</artifactId>
         <version>1.3</version>
         <scope>test</scope>
       </dependency>
       <dependency>
         <groupId>net.minidev</groupId>
         <artifactId>json-smart</artifactId>
         <version>2.3</version>
         <scope>test</scope>
       </dependency>
       <dependency>
         <groupId>com.googlecode.json-simple</groupId>
         <artifactId>json-simple</artifactId>
         <version>1.1.1</version>
         <scope>test</scope>
       </dependency>
       <dependency>
         <groupId>com.nimbusds</groupId>
         <artifactId>nimbus-jose-jwt</artifactId>
         <version>2.26.1</version>
         <scope>test</scope>
       </dependency>
     </dependencies>
     <licenses>
       <license>
   	  <name>Handle.Net Public License Agreement (ver.2)</name>
   	  <url>http://hdl.handle.net/20.1000/112</url>
   	  <distribution>manual</distribution>
   	</license>
     </licenses>
     <developers>
       <developer>
         <name>CNRI</name>
         <email>hdladmin@cnri.reston.va.us</email>
         <url>http://handle.net/hnr_support.html</url>
       </developer>
     </developers>
   </project>