Move optional tags to module POMs

Author: hisener

extended/pom.xml

@@ -34,6 +34,11 @@
             <artifactId>client-java-api-fluent</artifactId>
             <version>${project.version}</version>
         </dependency>
+        <dependency>
+            <groupId>io.prometheus</groupId>
+            <artifactId>simpleclient</artifactId>
+            <optional>${prometheus.client.optional}</optional>
+        </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>

pom.xml

@@ -69,6 +69,15 @@
     <prometheus.client.version>0.16.0</prometheus.client.version>
     <reflections.version>0.10.2</reflections.version>
 
+    <!-- The `optional` tag in `dependencyManagement` is not inherited; see
+    https://issues.apache.org/jira/browse/MNG-5227 and
+    https://issues.apache.org/jira/browse/MNG-5632. Therefore, we specify
+    optional dependencies here to manage them in a single location. -->
+    <prometheus.client.optional>true</prometheus.client.optional>
+    <com.amazonaws.aws-java-sdk-sts.optional>true</com.amazonaws.aws-java-sdk-sts.optional>
+    <com.google.auth.google-auth-library-oauth2-http.optional>true</com.google.auth.google-auth-library-oauth2-http.optional>
+    <org.springframework.boot.spring-boot-actuator.optional>true</org.springframework.boot.spring-boot-actuator.optional>
+
     <e2e.skip>true</e2e.skip>
 
     <gpg.keyname>48540ECBBF00A28EACCF04E720FD12AFB0C9EBA9</gpg.keyname>
@@ -185,19 +194,16 @@
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-actuator</artifactId>
         <version>${spring.boot.version}</version>
-        <optional>true</optional>
       </dependency>
       <dependency>
         <groupId>io.prometheus</groupId>
         <artifactId>simpleclient</artifactId>
         <version>${prometheus.client.version}</version>
-        <optional>true</optional>
       </dependency>
       <dependency>
         <groupId>io.prometheus</groupId>
         <artifactId>simpleclient_httpserver</artifactId>
         <version>${prometheus.client.version}</version>
-        <optional>true</optional>
       </dependency>
       <dependency>
         <groupId>com.google.code.gson</groupId>

spring/pom.xml

@@ -26,7 +26,11 @@
       <artifactId>client-java-extended</artifactId>
       <version>${project.version}</version>
     </dependency>
-
+    <dependency>
+      <groupId>io.prometheus</groupId>
+      <artifactId>simpleclient</artifactId>
+      <optional>${prometheus.client.optional}</optional>
+    </dependency>
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot</artifactId>
@@ -38,6 +42,7 @@
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-actuator</artifactId>
+      <optional>${org.springframework.boot.spring-boot-actuator.optional}</optional>
     </dependency>
     <dependency>
       <groupId>com.github.ben-manes.caffeine</groupId>

util/pom.xml

@@ -15,10 +15,12 @@
         <dependency>
             <groupId>io.prometheus</groupId>
             <artifactId>simpleclient</artifactId>
+            <optional>${prometheus.client.optional}</optional>
         </dependency>
         <dependency>
             <groupId>io.prometheus</groupId>
             <artifactId>simpleclient_httpserver</artifactId>
+            <optional>${prometheus.client.optional}</optional>
         </dependency>
         <dependency>
             <groupId>io.kubernetes</groupId>
@@ -65,6 +67,7 @@
         <dependency>
             <groupId>com.amazonaws</groupId>
             <artifactId>aws-java-sdk-sts</artifactId>
+            <optional>${com.amazonaws.aws-java-sdk-sts.optional}</optional>
         </dependency>
         <dependency>
             <groupId>ch.qos.logback</groupId>
@@ -86,7 +89,7 @@
         <dependency>
             <groupId>com.google.auth</groupId>
             <artifactId>google-auth-library-oauth2-http</artifactId>
-            <optional>true</optional>
+            <optional>${com.google.auth.google-auth-library-oauth2-http.optional}</optional>
         </dependency>
         <!-- test dependencies -->
         <dependency>