pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--

    Copyright The OpenZipkin Authors
    SPDX-License-Identifier: Apache-2.0

-->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>io.zipkin.aws</groupId>
  <artifactId>zipkin-aws-parent</artifactId>
  <version>1.2.6-SNAPSHOT</version>
  <packaging>pom</packaging>

  <modules>
    <module>aws-junit</module>
    <module>collector/kinesis</module>
    <module>collector/sqs</module>
    <module>brave/instrumentation-aws-java-sdk-core</module>
    <module>brave/instrumentation-aws-java-sdk-v2-core</module>
    <module>brave/instrumentation-aws-java-sdk-sqs</module>
    <module>brave/propagation-aws</module>
    <module>module</module>
    <module>reporter/reporter-xray-udp</module>
    <module>reporter/sender-awssdk-sqs</module>
    <module>reporter/sender-kinesis</module>
    <module>reporter/sender-sqs</module>
    <module>storage/xray-udp</module>
  </modules>

  <distributionManagement>
    <snapshotRepository>
      <id>ossrh</id>
      <url>https://oss.sonatype.org/content/repositories/snapshots</url>
    </snapshotRepository>
    <repository>
      <id>ossrh</id>
      <url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
    </repository>
  </distributionManagement>

  <issueManagement>
    <system>Github</system>
    <url>https://github.com/openzipkin/zipkin-aws/issues</url>
  </issueManagement>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.build.resourceEncoding>UTF-8</project.build.resourceEncoding>
    <project.build.outputEncoding>UTF-8</project.build.outputEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

    <main.basedir>${project.basedir}</main.basedir>

    <!-- default bytecode version for src/main -->
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <!-- We don't use animal-sniffer anymore as release obviates it.
         See https://github.com/mojohaus/animal-sniffer/issues/62 -->
    <maven.compiler.release>8</maven.compiler.release>

    <!-- Tests use the floor Java version (used in release) -->
    <maven.compiler.testSource>17</maven.compiler.testSource>
    <maven.compiler.testTarget>17</maven.compiler.testTarget>
    <maven.compiler.testRelease>17</maven.compiler.testRelease>

    <!-- groupId overrides allow testing feature branches with jitpack -->
    <!-- matching armeria/grpc/zipkin -->
    <zipkin.groupId>io.zipkin.zipkin2</zipkin.groupId>
    <!-- when updating, update docker/Dockerfile and storage/src/test/java/zipkin2/storage/kafka/IT* -->
    <zipkin.version>3.4.1</zipkin.version>
    <zipkin-reporter.version>3.4.0</zipkin-reporter.version>
    <spring-boot.version>3.3.3</spring-boot.version>
    <jackson.version>2.17.2</jackson.version>
    <!-- This allows you to test feature branches with jitpack -->
    <armeria.groupId>com.linecorp.armeria</armeria.groupId>
    <armeria.version>1.28.4</armeria.version>
    <!-- Match Armeria version to avoid conflicts including running tests in the IDE -->
    <netty.version>4.1.113.Final</netty.version>
    <log4j.version>2.23.1</log4j.version>

    <!-- This allows you to test feature branches with jitpack -->
    <!--    <brave.groupId>com.github.openzipkin.brave</brave.groupId>-->
    <!--    <brave.version>master-SNAPSHOT</brave.version>-->
    <brave.groupId>io.zipkin.brave</brave.groupId>
    <brave.version>6.0.3</brave.version>

    <aws-java-sdk.version>1.12.730</aws-java-sdk.version>
    <sdk-core.version>2.25.60</sdk-core.version>

    <okhttp.version>4.12.0</okhttp.version>

    <assertj.version>3.25.3</assertj.version>
    <awaitility.version>4.2.2</awaitility.version>
    <junit-jupiter.version>5.11.0</junit-jupiter.version>
    <mockito.version>5.13.0</mockito.version>

    <!-- override to set exclusions per-project -->
    <errorprone.args />
    <errorprone.version>2.30.0</errorprone.version>
    <auto-value.version>1.11.0</auto-value.version>

    <license.skip>${skipTests}</license.skip>

    <maven-surefire-plugin.argLine />
    <maven-failsafe-plugin.argLine />

    <go-offline-maven-plugin.version>1.2.8</go-offline-maven-plugin.version>
    <!-- TODO: cleanup any redundant ignores now also in the 4.0 release (once final) -->
    <license-maven-plugin.version>4.5</license-maven-plugin.version>
    <maven-bundle-plugin.version>5.1.9</maven-bundle-plugin.version>
    <maven-compiler-plugin.version>3.13.0</maven-compiler-plugin.version>
    <!-- Use same version as https://github.com/openzipkin/docker-java -->
    <maven-dependency-plugin.version>3.6.1</maven-dependency-plugin.version>
    <maven-deploy-plugin.version>3.1.2</maven-deploy-plugin.version>
    <maven-enforcer-plugin.version>3.4.1</maven-enforcer-plugin.version>
    <!-- Use same version as https://github.com/openzipkin/docker-java -->
    <maven-help-plugin.version>3.4.0</maven-help-plugin.version>
    <maven-install-plugin.version>3.1.2</maven-install-plugin.version>
    <maven-javadoc-plugin.version>3.6.3</maven-javadoc-plugin.version>
    <maven-jar-plugin.version>3.4.1</maven-jar-plugin.version>
    <maven-release-plugin.version>3.0.1</maven-release-plugin.version>
    <maven-shade-plugin.version>3.6.0</maven-shade-plugin.version>
    <maven-source-plugin.version>3.3.1</maven-source-plugin.version>
    <maven-surefire-plugin.version>3.5.0</maven-surefire-plugin.version>
    <nexus-staging-maven-plugin.version>1.6.13</nexus-staging-maven-plugin.version>
  </properties>

  <name>Zipkin Amazon Web Services (Parent)</name>
  <description>Zipkin Amazon Web Services (Parent)</description>
  <url>https://github.com/openzipkin/zipkin-aws</url>
  <inceptionYear>2016</inceptionYear>

  <organization>
    <name>OpenZipkin</name>
    <url>https://zipkin.io/</url>
  </organization>

  <licenses>
    <license>
      <name>The Apache Software License, Version 2.0</name>
      <url>https://www.apache.org/licenses/LICENSE-2.0.txt</url>
      <distribution>repo</distribution>
    </license>
  </licenses>

  <scm>
    <url>https://github.com/openzipkin/zipkin-aws</url>
    <connection>scm:git:https://github.com/openzipkin/zipkin-aws.git</connection>
    <developerConnection>scm:git:https://github.com/openzipkin/zipkin-aws.git</developerConnection>
    <tag>HEAD</tag>
  </scm>

  <!-- Developer section is needed for Maven Central, but doesn't need to include each person -->
  <developers>
    <developer>
      <id>openzipkin</id>
      <name>OpenZipkin Gitter</name>
      <url>https://gitter.im/openzipkin/zipkin</url>
    </developer>
  </developers>

  <dependencyManagement>
    <!-- Be careful here, especially to not import BOMs as it causes version confusion.

         For example, if you imported Netty's BOM here, end users would also download that BOM. As
         Brave is indirectly used, this can be extremely confusing when people are troubleshooting
         library version assignments. -->
  </dependencyManagement>

  <dependencies>
    <!-- Only add absolutely required dependencies as compile scope. Adding more can pin versions,
         causing problems for end users difficult to unravel. -->

    <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter-api</artifactId>
      <version>${junit-jupiter.version}</version>
      <scope>test</scope>
    </dependency>
    <!-- needed for surefire.
         https://maven.apache.org/surefire/maven-surefire-plugin/examples/junit-platform.html -->
    <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter-engine</artifactId>
      <version>${junit-jupiter.version}</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>${zipkin.groupId}</groupId>
      <artifactId>zipkin-tests</artifactId>
      <version>${zipkin.version}</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.assertj</groupId>
      <artifactId>assertj-core</artifactId>
      <version>${assertj.version}</version>
      <scope>test</scope>
    </dependency>
    <!-- Main code uses jul and tests log with log4j -->
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-core</artifactId>
      <version>${log4j.version}</version>
      <scope>test</scope>
    </dependency>
    <!-- route jul over log4j2 during integration tests -->
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-jul</artifactId>
      <version>${log4j.version}</version>
      <scope>test</scope>
    </dependency>
    <!-- route log4j over log4j2 during integration tests -->
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-1.2-api</artifactId>
      <version>${log4j.version}</version>
      <scope>test</scope>
    </dependency>
    <!-- route slf4j over log4j2 during integration tests -->
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-slf4j-impl</artifactId>
      <version>${log4j.version}</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.mockito</groupId>
      <artifactId>mockito-core</artifactId>
      <version>${mockito.version}</version>
      <scope>test</scope>
    </dependency>
  </dependencies>

  <build>
    <pluginManagement>
      <plugins>
        <!-- mvn de.qaware.maven:go-offline-maven-plugin:resolve-dependencies -->
        <plugin>
          <groupId>de.qaware.maven</groupId>
          <artifactId>go-offline-maven-plugin</artifactId>
          <version>${go-offline-maven-plugin.version}</version>
          <configuration>
            <!-- Add dependencies indirectly referenced by build plugins -->
            <dynamicDependencies>
              <DynamicDependency>
                <groupId>com.mycila</groupId>
                <artifactId>license-maven-plugin-git</artifactId>
                <version>${license-maven-plugin.version}</version>
                <repositoryType>MAIN</repositoryType>
              </DynamicDependency>
              <DynamicDependency>
                <groupId>com.google.errorprone</groupId>
                <artifactId>error_prone_core</artifactId>
                <version>${errorprone.version}</version>
                <repositoryType>MAIN</repositoryType>
              </DynamicDependency>
              <DynamicDependency>
                <groupId>org.apache.maven.surefire</groupId>
                <artifactId>surefire-junit-platform</artifactId>
                <version>${maven-surefire-plugin.version}</version>
                <repositoryType>PLUGIN</repositoryType>
              </DynamicDependency>
            </dynamicDependencies>
          </configuration>
        </plugin>

        <!-- Uploads occur as a last step (which also adds checksums) -->
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>${maven-deploy-plugin.version}</version>
        </plugin>

        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>${maven-install-plugin.version}</version>
        </plugin>

        <plugin>
          <artifactId>maven-jar-plugin</artifactId>
          <version>${maven-jar-plugin.version}</version>
          <configuration>
            <archive>
              <!-- prevents huge pom file from also being added to the jar under META-INF/maven -->
              <addMavenDescriptor>false</addMavenDescriptor>
            </archive>
          </configuration>
        </plugin>

        <plugin>
          <artifactId>maven-release-plugin</artifactId>
          <version>${maven-release-plugin.version}</version>
          <configuration>
            <useReleaseProfile>false</useReleaseProfile>
            <releaseProfiles>release</releaseProfiles>
            <autoVersionSubmodules>true</autoVersionSubmodules>
            <tagNameFormat>@{project.version}</tagNameFormat>
          </configuration>
        </plugin>

        <plugin>
          <groupId>org.sonatype.plugins</groupId>
          <artifactId>nexus-staging-maven-plugin</artifactId>
          <version>${nexus-staging-maven-plugin.version}</version>
        </plugin>
      </plugins>
    </pluginManagement>

    <plugins>
      <!-- Ensure common utility commands use coherent versions (avoid lazy downloads) -->
      <plugin>
        <artifactId>maven-dependency-plugin</artifactId>
        <version>${maven-dependency-plugin.version}</version>
      </plugin>
      <plugin>
        <artifactId>maven-help-plugin</artifactId>
        <version>${maven-help-plugin.version}</version>
      </plugin>

      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>${maven-compiler-plugin.version}</version>
        <inherited>true</inherited>
        <configuration>
          <fork>true</fork>
          <showWarnings>true</showWarnings>
        </configuration>
      </plugin>

      <plugin>
        <artifactId>maven-surefire-plugin</artifactId>
        <version>${maven-surefire-plugin.version}</version>
        <configuration>
          <!-- Ensure scope leak cause ends up in the console -->
          <trimStackTrace>false</trimStackTrace>
          <!-- Don't add org.apache.logging.log4j.jul.LogManager here as it conflicts with
               classloading, causing brave.test.propagation.PropagationTest to flake. -->
          <classpathDependencyExcludes>
            <classpathDependencyExclude>org.apache.logging.log4j:log4j-jul
            </classpathDependencyExclude>
          </classpathDependencyExcludes>
        </configuration>
        <dependencies>
          <!-- needed for surefire.
               https://maven.apache.org/surefire/maven-surefire-plugin/examples/junit-platform.html -->
          <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <version>${junit-jupiter.version}</version>
          </dependency>
        </dependencies>
      </plugin>

      <plugin>
        <artifactId>maven-failsafe-plugin</artifactId>
        <version>${maven-surefire-plugin.version}</version>
        <executions>
          <execution>
            <id>integration-test</id>
            <phase>verify</phase>
            <goals>
              <goal>integration-test</goal>
              <goal>verify</goal>
            </goals>
          </execution>
        </executions>
        <configuration>
          <!-- Try to prevent flakes in CI -->
          <reuseForks>false</reuseForks>
          <!-- workaround to SUREFIRE-1831 -->
          <useModulePath>false</useModulePath>
          <!-- Brave and OkHttp MockWebServer log with java.util.logging. Adding the bridge allows
               allows us to change scope and format via log4j2.properties -->
          <systemPropertyVariables>
            <java.util.logging.manager>org.apache.logging.log4j.jul.LogManager
            </java.util.logging.manager>
          </systemPropertyVariables>
          <!-- Ensure scope leak cause ends up in the console -->
          <trimStackTrace>false</trimStackTrace>
        </configuration>
      </plugin>

      <plugin>
        <artifactId>maven-enforcer-plugin</artifactId>
        <version>${maven-enforcer-plugin.version}</version>
        <executions>
          <execution>
            <id>enforce-java</id>
            <goals>
              <goal>enforce</goal>
            </goals>
            <configuration>
              <rules>
                <requireJavaVersion>
                  <!-- Change this to control LTS JDK versions allowed to build
                       the project. Keep in sync with .github/workflows -->
                  <version>[11,12),[17,18),[21,22)</version>
                </requireJavaVersion>
              </rules>
            </configuration>
          </execution>
        </executions>
      </plugin>

      <plugin>
        <groupId>com.mycila</groupId>
        <artifactId>license-maven-plugin</artifactId>
        <version>${license-maven-plugin.version}</version>
        <configuration>
          <skip>${license.skip}</skip>
          <header>${main.basedir}/src/etc/header.txt</header>
          <mapping>
            <!-- Don't use javadoc style as this makes code formatters break it by adding tags! -->
            <java>SLASHSTAR_STYLE</java>
            <!-- build-bin/docker -->
            <configure_docker>SCRIPT_STYLE</configure_docker>
            <configure_docker_push>SCRIPT_STYLE</configure_docker_push>
            <docker_arch>SCRIPT_STYLE</docker_arch>
            <docker_args>SCRIPT_STYLE</docker_args>
            <docker_block_on_health>SCRIPT_STYLE</docker_block_on_health>
            <docker_build>SCRIPT_STYLE</docker_build>
            <docker_push>SCRIPT_STYLE</docker_push>
            <docker_test_image>SCRIPT_STYLE</docker_test_image>
            <!-- build-bin/git -->
            <login_git>SCRIPT_STYLE</login_git>
            <version_from_trigger_tag>SCRIPT_STYLE</version_from_trigger_tag>
            <!-- build-bin/gpg -->
            <configure_gpg>SCRIPT_STYLE</configure_gpg>
            <!-- build-bin/maven -->
            <maven_build>SCRIPT_STYLE</maven_build>
            <maven_build_or_unjar>SCRIPT_STYLE</maven_build_or_unjar>
            <maven_deploy>SCRIPT_STYLE</maven_deploy>
            <maven_go_offline>SCRIPT_STYLE</maven_go_offline>
            <maven_release>SCRIPT_STYLE</maven_release>
            <maven_opts>SCRIPT_STYLE</maven_opts>
            <maven_unjar>SCRIPT_STYLE</maven_unjar>
          </mapping>
          <excludes>
            <exclude>.docker.env</exclude>
            <exclude>.gitignore</exclude>
            <exclude>.editorconfig</exclude>
            <exclude>.mvn/**</exclude>
            <exclude>mvnw*</exclude>
            <exclude>etc/header.txt</exclude>
            <exclude>**/.idea/**</exclude>
            <exclude>LICENSE</exclude>
            <exclude>**/*.md</exclude>
            <exclude>src/test/resources/**</exclude>
            <exclude>src/main/resources/**</exclude>
            <exclude>.dockerignore</exclude>
            <exclude>build-bin/*</exclude>
          </excludes>
          <strictCheck>true</strictCheck>
        </configuration>
        <dependencies>
          <dependency>
            <groupId>com.mycila</groupId>
            <artifactId>license-maven-plugin-git</artifactId>
            <version>${license-maven-plugin.version}</version>
          </dependency>
        </dependencies>
        <executions>
          <execution>
            <goals>
              <goal>check</goal>
            </goals>
            <phase>compile</phase>
          </execution>
        </executions>
      </plugin>
    </plugins>

    <resources>
      <!-- This adds the LICENSE and NOTICE file to the jar and -sources jar of each module -->
      <resource>
        <filtering>false</filtering>
        <directory>${main.basedir}</directory>
        <targetPath>META-INF/</targetPath>
        <includes>
          <include>LICENSE</include>
          <include>NOTICE</include>
        </includes>
      </resource>
      <!-- This ensures any Spring Boot YAML are included in the jar -->
      <resource>
        <filtering>false</filtering>
        <directory>src/main/resources</directory>
        <includes>
          <include>*.yml</include>
        </includes>
      </resource>
    </resources>
  </build>

  <profiles>
    <profile>
      <id>error-prone-11+</id>
      <activation>
        <!-- Only LTS versions -->
        <jdk>[11,12),[17,18),[21,22)</jdk>
      </activation>
      <build>
        <plugins>
          <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>${maven-compiler-plugin.version}</version>
            <inherited>true</inherited>
            <configuration>
              <fork>true</fork>
              <showWarnings>true</showWarnings>
            </configuration>
            <executions>
              <execution>
                <!-- only use errorprone on main source tree -->
                <id>default-compile</id>
                <phase>compile</phase>
                <goals>
                  <goal>compile</goal>
                </goals>
                <configuration>
                  <forceJavacCompilerUse>true</forceJavacCompilerUse>
                  <compilerArgs>
                    <arg>-XDcompilePolicy=simple</arg>
                    <arg>-Xplugin:ErrorProne ${errorprone.args}</arg>
                    <!-- below needed for JDK16+ per https://errorprone.info/docs/installation -->
                    <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED</arg>
                    <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED</arg>
                    <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.main=ALL-UNNAMED</arg>
                    <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.model=ALL-UNNAMED</arg>
                    <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED</arg>
                    <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.processing=ALL-UNNAMED</arg>
                    <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED</arg>
                    <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED</arg>
                    <arg>-J--add-opens=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED</arg>
                    <arg>-J--add-opens=jdk.compiler/com.sun.tools.javac.comp=ALL-UNNAMED</arg>
                  </compilerArgs>
                  <annotationProcessorPaths>
                    <processorPath>
                      <groupId>com.google.errorprone</groupId>
                      <artifactId>error_prone_core</artifactId>
                      <version>${errorprone.version}</version>
                    </processorPath>
                    <!-- auto-value is placed here even though not needed for all projects as
                         configuring along with errorprone is tricky in subprojects -->
                    <processorPath>
                      <groupId>com.google.auto.value</groupId>
                      <artifactId>auto-value</artifactId>
                      <version>${auto-value.version}</version>
                    </processorPath>
                  </annotationProcessorPaths>
                </configuration>
              </execution>
            </executions>
          </plugin>
        </plugins>
      </build>
    </profile>

    <profile>
      <id>release</id>
      <build>
        <plugins>
          <plugin>
            <groupId>org.sonatype.plugins</groupId>
            <artifactId>nexus-staging-maven-plugin</artifactId>
            <extensions>true</extensions>
            <configuration>
              <serverId>ossrh</serverId>
              <nexusUrl>https://oss.sonatype.org/</nexusUrl>
              <!-- Zipkin release is about ~100M mostly from the two server distributions. Default
                   will timeout after 5 minutes, which can trigger fairly easily with this size. -->
              <stagingProgressPauseDurationSeconds>20</stagingProgressPauseDurationSeconds>
              <stagingProgressTimeoutMinutes>30</stagingProgressTimeoutMinutes>
              <autoReleaseAfterClose>true</autoReleaseAfterClose>
            </configuration>
          </plugin>

          <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-gpg-plugin</artifactId>
            <version>3.2.4</version>
            <executions>
              <execution>
                <id>sign-artifacts</id>
                <phase>verify</phase>
                <goals>
                  <goal>sign</goal>
                </goals>
                <configuration>
                  <gpgArguments>
                    <arg>--pinentry-mode</arg>
                    <arg>loopback</arg>
                  </gpgArguments>
                </configuration>
              </execution>
            </executions>
          </plugin>

          <!-- Creates source jar -->
          <plugin>
            <artifactId>maven-source-plugin</artifactId>
            <version>${maven-source-plugin.version}</version>
            <executions>
              <execution>
                <id>attach-sources</id>
                <goals>
                  <goal>jar</goal>
                </goals>
              </execution>
            </executions>
          </plugin>

          <!-- Creates javadoc jar, skipping internal classes -->
          <plugin>
            <artifactId>maven-javadoc-plugin</artifactId>
            <version>${maven-javadoc-plugin.version}</version>
            <configuration>
              <sourceFileExcludes>
                <exclude>**/internal/*.java</exclude>
                <exclude>**/Internal*.java</exclude>
              </sourceFileExcludes>
              <excludePackageNames>*.internal.*</excludePackageNames>
              <failOnError>false</failOnError>
              <!-- hush pedantic warnings: we don't put param and return on everything! -->
              <doclint>none</doclint>
              <!-- While we publish modules, our source is pre-Java9 so tell javadoc that. -->
              <source>8</source>
            </configuration>
            <executions>
              <execution>
                <id>attach-javadocs</id>
                <goals>
                  <goal>jar</goal>
                </goals>
                <phase>package</phase>
              </execution>
            </executions>
          </plugin>
        </plugins>
      </build>
    </profile>
  </profiles>
</project>