Add signing in sub module

Author: clun

astra-db-java/pom.xml

@@ -3,6 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <artifactId>astra-db-java</artifactId>
     <name>Data API Client Java</name>
+    <packaging>jar</packaging>
     <description>Implementation of a client to the Astra/Stargate Data API written in Java</description>
 
     <!-- Reference to parent -->
@@ -136,6 +137,53 @@
                     </execution>
                 </executions>
             </plugin>
+
+            <!-- Signing -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-gpg-plugin</artifactId>
+                <version>${version.maven.plugin.gpg}</version>
+                <executions>
+                    <execution>
+                        <id>sign-artifacts</id>
+                        <phase>verify</phase>
+                        <goals>
+                            <goal>sign</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+
+            <!-- Sources JAR -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-source-plugin</artifactId>
+                <version>${version.maven.plugin.source}</version>
+                <executions>
+                    <execution>
+                        <id>attach-sources</id>
+                        <goals>
+                            <goal>jar</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+
+            <!-- Javadoc JAR -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+                <version>${version.maven.plugin.javadoc}</version>
+                <executions>
+                    <execution>
+                        <id>attach-javadocs</id>
+                        <goals>
+                            <goal>jar</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            
         </plugins>
     </build>