extract version into properties tag & moved common properties in parent

persistence-modules/redis/pom.xml

@@ -33,7 +33,7 @@
         <dependency>
             <groupId>redis.clients</groupId>
             <artifactId>jedis</artifactId>
-            <version>3.3.0</version>
+            <version>${redisson.version}</version>
         </dependency>
         <dependency>
             <groupId>com.github.kstyrc</groupId>

persistence-modules/spring-data-jpa-5/pom.xml

@@ -42,7 +42,7 @@
         <dependency>
             <groupId>org.mapstruct</groupId>
             <artifactId>mapstruct-jdk8</artifactId>
-            <version>1.3.1.Final</version>
+            <version>${mapstruct.version}</version>
             <scope>provided</scope>
         </dependency>
       
@@ -68,4 +68,14 @@
             </plugin>
         </plugins>
     </build>
+
+    <properties>
+        <spring-boot-version>2.1.9.RELEASE</spring-boot-version>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <start-class>com.baeldung.springdatageode.app.ClientCacheApp</start-class>
+        <spring-geode-starter-version>1.1.1.RELEASE</spring-geode-starter-version>
+        <spring.boot.starter.version>2.1.9.RELEASE</spring.boot.starter.version>
+        <mapstruct.version>1.3.1.Final</mapstruct.version>
+    </properties>
+
 </project>

persistence-modules/spring-data-mongodb/pom.xml

@@ -22,7 +22,7 @@
         <dependency>
             <groupId>org.springframework.data</groupId>
             <artifactId>spring-data-releasetrain</artifactId>
-            <version>Lovelace-SR9</version>
+            <version>${spring-releasetrain}</version>
             <type>pom</type>
         </dependency>
 
@@ -101,6 +101,7 @@
         <mysema.maven.version>1.1.3</mysema.maven.version>
         <mongodb-reactivestreams.version>1.9.2</mongodb-reactivestreams.version>
         <projectreactor.version>3.2.0.RELEASE</projectreactor.version>
+        <spring-releasetrain>Lovelace-SR9</spring-releasetrain>
     </properties>
 
 </project>