Build Javadoc in docker-compose job

Author: wesm

.travis.yml

@@ -206,7 +206,7 @@ matrix:
     - if [ $ARROW_CI_JAVA_AFFECTED != "1" ]; then exit; fi
     - docker-compose pull java-all-jdks
     script:
-    - docker-compose run java-all-jdk
+    - docker-compose run java-all-jdks
   - name: "Integration w/ OpenJDK 8, conda-forge toolchain"
     language: java
     os: linux

ci/docker_build_java.sh

@@ -31,4 +31,9 @@ popd
 
 pushd $arrow_src/java
 mvn -B -DskipTests -Drat.skip=true install
+
+if [ "$ARROW_JAVADOC" == "1" ]; then
+  export MAVEN_OPTS="$MAVEN_OPTS -Dorg.slf4j.simpleLogger.defaultLogLevel=warn"
+  mvn -B site
+fi
 popd

ci/docker_build_java_all.sh

@@ -21,7 +21,9 @@ set -e
 SOURCE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
 export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
+export ARROW_JAVADOC=1
 bash $SOURCE_DIR/docker_build_java.sh
 
 export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64
+export ARROW_JAVADOC=0
 bash $SOURCE_DIR/docker_build_java.sh

ci/travis_script_javadoc.sh

@@ -30,9 +30,8 @@ RUN export DEBIAN_FRONTEND=noninteractive && \
         rsync \
         tzdata \
         openjdk-8-jdk \
-        openjdk-11-jdk
-
-RUN apt-get clean && rm -rf /var/lib/apt/lists/*
+        openjdk-11-jdk && \
+    apt-get clean && rm -rf /var/lib/apt/lists/*
 
 # Test all supported JDKs
 CMD ["arrow/ci/docker_build_java_all.sh"]