chore(project): switch to jdk 11 source code level

.ci/daily/Jenkinsfile

@@ -1,6 +1,6 @@
 // https://github.com/camunda/jenkins-global-shared-library
 // https://github.com/camunda/cambpm-jenkins-shared-library
-@Library(['camunda-ci', 'cambpm-jenkins-shared-library']) _
+@Library(['camunda-ci', 'cambpm-jenkins-shared-library@3690']) _
 
 def failedStageTypes = []
 
@@ -13,6 +13,7 @@ pipeline {
   environment {
     LOGGER_LOG_LEVEL = 'DEBUG'
     MAVEN_VERSION = 'maven-3.8-latest'
+    DEF_JDK_VERSION = 'jdk-11-latest'
   }
   parameters {
     booleanParam name: 'TRIGGERED_BY_UPSTREAM', defaultValue: false, description: 'Is the current build triggered in the scope of an upstream pipeline (pull request or default branch)'

.ci/main-trigger/Jenkinsfile

@@ -1,6 +1,6 @@
 // https://github.com/camunda/jenkins-global-shared-library
 // https://github.com/camunda/cambpm-jenkins-shared-library
-@Library(['camunda-ci', 'cambpm-jenkins-shared-library']) _
+@Library(['camunda-ci', 'cambpm-jenkins-shared-library@3690']) _
 
 pipeline {
   agent {
@@ -11,6 +11,7 @@ pipeline {
   environment {
     LOGGER_LOG_LEVEL = 'DEBUG'
     MAVEN_VERSION = 'maven-3.8-latest'
+    DEF_JDK_VERSION = 'jdk-11-latest'
   }
   options {
     buildDiscarder(logRotator(numToKeepStr: '5'))

.ci/sidetrack/Jenkinsfile

@@ -1,6 +1,6 @@
 // https://github.com/camunda/jenkins-global-shared-library
 // https://github.com/camunda/cambpm-jenkins-shared-library
-@Library(['camunda-ci', 'cambpm-jenkins-shared-library']) _
+@Library(['camunda-ci', 'cambpm-jenkins-shared-library@3690']) _
 
 pipeline {
   agent {
@@ -11,6 +11,7 @@ pipeline {
   environment {
     LOGGER_LOG_LEVEL = 'DEBUG'
     MAVEN_VERSION = 'maven-3.8-latest'
+    DEF_JDK_VERSION = 'jdk-11-latest'
   }
   parameters {
     booleanParam name: 'TRIGGERED_BY_UPSTREAM', defaultValue: false, description: 'Is the current build triggered in the scope of an upstream pipeline (pull request or default branch)'

Jenkinsfile

@@ -1,6 +1,6 @@
 // https://github.com/camunda/jenkins-global-shared-library
 // https://github.com/camunda/cambpm-jenkins-shared-library
-@Library(['camunda-ci', 'cambpm-jenkins-shared-library']) _
+@Library(['camunda-ci', 'cambpm-jenkins-shared-library@3690']) _
 
 def failedStageTypes = []
 
@@ -13,6 +13,7 @@ pipeline {
   environment {
     LOGGER_LOG_LEVEL = 'DEBUG'
     MAVEN_VERSION = 'maven-3.8-latest'
+    DEF_JDK_VERSION = 'jdk-11-latest'
   }
   options {
     buildDiscarder(logRotator(numToKeepStr: '5'))
@@ -50,7 +51,7 @@ pipeline {
                   withCatch: false,
                   withNpm: true,
                   // we use JDK 17 to build the artifacts, as it is required for supporting Spring Boot 3
-                  // the compiler source and target is set to JDK 8 in the release parents
+                  // the compiler source and target is set to JDK 11 in the release parents
                   jdkVersion: 'jdk-17-latest')
             }
 
@@ -227,7 +228,7 @@ pipeline {
                   'clean install -Pwildfly,postgresql,engine-integration-jakarta', 
                   runtimeStash: true, 
                   archiveStash: true,
-                  // we need to use JDK 17 for WildFly 27+ + Spring 6
+                  // we need to use JDK 17 for Spring 6
                   jdkVersion: 'jdk-17-latest')
               },
               postFailure: {
@@ -272,7 +273,7 @@ pipeline {
                   'clean install -Pwildfly,postgresql,postgresql-xa,engine-integration-jakarta', 
                   runtimeStash: true, 
                   archiveStash: true,
-                  // we need to use JDK 17 for WildFly 27+ + Spring 6
+                  // we need to use JDK 17 for Spring 6
                   jdkVersion: 'jdk-17-latest')
               },
               postFailure: {
@@ -333,9 +334,7 @@ pipeline {
                 cambpmRunMaven('qa/',
                   'clean install -Pwildfly,h2,webapps-integration',
                   runtimeStash: true,
-                  archiveStash: true,
-                  // we need to use JDK 11 for WildFly 27+
-                  jdkVersion: 'jdk-11-latest')
+                  archiveStash: true)
               },
               postFailure: {
                 cambpmPublishTestResult()
@@ -495,7 +494,7 @@ pipeline {
                   'clean install -Pwildfly-domain,h2,engine-integration-jakarta',
                   runtimeStash: true,
                   archiveStash: true,
-                  // we need to use JDK 17 for WildFly 27+ + Spring 6
+                  // we need to use JDK 17 for Spring 6
                   jdkVersion: 'jdk-17-latest')
               },
               postFailure: {
@@ -518,7 +517,7 @@ pipeline {
                   'clean install -Pwildfly,wildfly-servlet,h2,engine-integration-jakarta',
                   runtimeStash: true,
                   archiveStash: true,
-                  // we need to use JDK 17 for WildFly 27+ + Spring 6
+                  // we need to use JDK 17 for Spring 6
                   jdkVersion: 'jdk-17-latest')
               },
               postFailure: {

clients/java/README.md

@@ -24,8 +24,8 @@ The **Camunda External Task Client (Java)** allows to set up remote Service Task
 * The topic subscription can be configured with the fluent api of the [TopicSubscriptionBuilder](client/src/main/java/org/camunda/bpm/client/topic/TopicSubscriptionBuilder.java).
 
 ## Prerequisites
-* Oracle Hotspot v1.8+ (JDK 8)
-* Camunda BPM Platform 7.9.0+
+* Java (supported version by the used Camunda Platform 7)
+* Camunda Platform 7
 
 ## Maven coordinates
 The following Maven coordinate needs to be added to the projects `pom.xml`:
@@ -37,16 +37,6 @@ The following Maven coordinate needs to be added to the projects `pom.xml`:
 </dependency>
 ```
 
-### JDK 9+ Support
-If you want to use a JDK higher than 1.8, please add the following dependency to the projects `pom.xml`:
-```xml
-<dependency>
-  <groupId>com.sun.xml.bind</groupId>
-  <artifactId>jaxb-impl</artifactId>
-  <version>2.2.4</version>
-</dependency>
-```
-
 ## Contributing
 
 Have a look at our [contribution guide](https://github.com/camunda/camunda-bpm-platform/blob/master/CONTRIBUTING.md) for how to contribute to this repository.

clients/java/client/pom.xml

@@ -157,6 +157,13 @@
       <version>${project.version}</version>
     </dependency>
 
+    <dependency>
+      <groupId>com.sun.xml.bind</groupId>
+      <artifactId>jaxb-impl</artifactId>
+      <version>${version.xml.jaxb-impl}</version>
+      <scope>provided</scope>
+    </dependency>
+
   </dependencies>
 
   <build>
@@ -314,22 +321,4 @@
 
   </build>
 
-  <profiles>
-    <profile>
-      <id>jdk-9-plus</id>
-      <activation>
-        <jdk>(1.8,)</jdk>
-      </activation>
-
-      <dependencies>
-        <dependency>
-          <groupId>com.sun.xml.bind</groupId>
-          <artifactId>jaxb-impl</artifactId>
-          <version>${version.xml.jaxb-impl}</version>
-          <scope>provided</scope>
-        </dependency>
-      </dependencies>
-    </profile>
-  </profiles>
-
 </project>

database/pom.xml

@@ -18,7 +18,7 @@
 
     <!-- database driver versions -->
     <version.h2>2.1.214</version.h2>
-    <version.h2-v1>1.4.190</version.h2-v1><!-- used for instance migration qa -->
+    <version.h2-v1>1.4.200</version.h2-v1><!-- used for instance migration qa -->
     <version.oracle>19.3.0.0</version.oracle>
     <version.mariadb>1.7.6</version.mariadb>
     <version.mariadb-v1>1.1.8</version.mariadb-v1>

distro/run/core/pom.xml

@@ -53,19 +53,6 @@
       <groupId>org.camunda.bpm.springboot</groupId>
       <artifactId>camunda-bpm-spring-boot-starter-rest</artifactId>
     </dependency>
-
-    <!-- jersey-server (transitive dependency of camunda-bpm-spring-boot-starter-rest)
-      requires JAXB API and Activation API
-      to be present; Its pom has an optional profile 
-      (activated by Java 11+) that adds these dependencies.
-      However, in order to be able to build Run with Java 8 and
-      operate it with Java 11+, we must have a 
-      direct dependency to JAXB, regardless which Java version we 
-      use for building -->
-    <dependency>
-      <groupId>jakarta.xml.bind</groupId>
-      <artifactId>jakarta.xml.bind-api</artifactId>
-    </dependency>
 
     <dependency>
       <groupId>org.springframework.boot</groupId>

distro/wildfly/pom.xml

@@ -45,7 +45,7 @@
                   <message>
                     *****************************************************************************************************
                     *                                                                                                   *
-                    *                You must use at least JDK 11 to compile Camunda Platform Wildfly!!!               *
+                    *                You must use at least JDK 11 to compile Camunda Platform Wildfly!!!                *
                     *                                                                                                   *
                     *****************************************************************************************************
                   </message>

distro/wildfly26/pom.xml

@@ -41,11 +41,11 @@
             <configuration>
               <rules>
                 <requireJavaVersion>
-                  <version>[1.8,)</version>
+                  <version>[11,)</version>
                   <message>
                     *****************************************************************************************************
                     *                                                                                                   *
-                    *                You must use at least JDK 1.8 to compile Camunda Platform Wildfly!!!               *
+                    *                You must use at least JDK 11 to compile Camunda Platform Wildfly!!!                *
                     *                                                                                                   *
                     *****************************************************************************************************
                   </message>

engine-plugins/spin-plugin/pom.xml

@@ -128,6 +128,11 @@
       <scope>test</scope>
     </dependency>
 
+    <dependency>
+      <groupId>com.sun.xml.bind</groupId>
+      <artifactId>jaxb-impl</artifactId>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 
   <build>
@@ -141,21 +146,4 @@
     </plugins>
   </build>
 
-  <profiles>
-    <profile>
-      <id>jdk9-and-onwards</id>
-      <activation>
-        <jdk>[9,)</jdk>
-      </activation>
-
-      <dependencies>
-        <dependency>
-          <groupId>com.sun.xml.bind</groupId>
-          <artifactId>jaxb-impl</artifactId>
-          <scope>test</scope>
-        </dependency>
-      </dependencies>
-    </profile>
-  </profiles>
-
 </project>

engine-rest/engine-rest/pom.xml

@@ -40,7 +40,8 @@
       <artifactId>jackson-jaxrs-json-provider</artifactId>
       <!--
       * Since version 2.10.0 this dependency comes with transitive Jakarta dependencies
-      * These trans-deps are directly included in JDKs <= Java 8 * For Java >= 9 compatible containers, we make sure to include these dependencies
+      * These trans-deps are directly included in JDKs <= Java 8
+      * For Java >= 9 compatible containers, we make sure to include these dependencies
       -->
       <exclusions>
         <exclusion>

engine/pom.xml

@@ -348,10 +348,10 @@
     </camunda.artifact>
     <camunda.osgi.export.pkg>
       !${camunda.artifact}.engine.variable.*,
-      ${camunda.artifact};${camunda.osgi.version};-noimport:=true,
-      ${camunda.artifact}.application.*;${camunda.osgi.version};-noimport:=true,
-      ${camunda.artifact}.container.*;${camunda.osgi.version};-noimport:=true,
-      ${camunda.artifact}.engine.*;${camunda.osgi.version};-noimport:=true
+      ${camunda.artifact},
+      ${camunda.artifact}.application.*,
+      ${camunda.artifact}.container.*,
+      ${camunda.artifact}.engine.*
     </camunda.osgi.export.pkg>
     <camunda.osgi.import.additional>
       !com.google.gson.*,