GH-6: Add Linux test CI

Fixes #6.

.env

@@ -0,0 +1,52 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+# All of the following environment variables are required to set default values
+# for the parameters in docker-compose.yml.
+
+# empty prefix means that the docker-compose configuration will use named
+# volumes which potentially improves the performance on docker for macos and
+# docker for windows, it also prevents the contamination of the source
+# directory
+# a non-empty prefix means that directories from the host are bind-mounted
+# into the container, it should be set to ".docker/" on github actions to keep
+# the cache plugin functional
+DOCKER_VOLUME_PREFIX=
+
+# turn on inline build cache, this is a docker buildx feature documented
+# at https://github.com/docker/buildx#--cache-tonametypetypekeyvalue
+BUILDKIT_INLINE_CACHE=1
+COMPOSE_DOCKER_CLI_BUILD=1
+DOCKER_BUILDKIT=1
+
+# different architecture notations
+ARCH=amd64
+ARCH_ALIAS=x86_64
+ARCH_SHORT=amd64
+
+# Default repository to pull and push images from
+REPO=apache/arrow-dev
+
+# The setup attempts to generate coredumps by default, in order to disable the
+# coredump generation set it to 0
+ULIMIT_CORE=-1
+
+# Default versions for platforms
+
+# Default versions for various dependencies
+JDK=11
+MAVEN=3.9.6

.github/workflows/java.yml

@@ -0,0 +1,73 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+name: Test
+
+on:
+  push:
+    branches:
+      - '**'
+      - '!dependabot/**'
+    tags:
+      - '**'
+  pull_request:
+
+concurrency:
+  group: ${{ github.repository }}-${{ github.head_ref || github.sha }}-${{ github.workflow }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+env:
+  DOCKER_VOLUME_PREFIX: ".docker/"
+
+jobs:
+  ubuntu:
+    name: AMD64 Ubuntu 22.04 JDK ${{ matrix.jdk }} Maven ${{ matrix.maven }}
+    runs-on: ubuntu-latest
+    if: ${{ !contains(github.event.pull_request.title, 'WIP') }}
+    timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      matrix:
+        jdk: [11, 17, 21, 22]
+        maven: [3.9.6]
+        image: [java]
+    env:
+      JDK: ${{ matrix.jdk }}
+      MAVEN: ${{ matrix.maven }}
+    steps:
+      - name: Checkout Arrow
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
+        with:
+          fetch-depth: 0
+          submodules: recursive
+      - name: Cache Docker Volumes
+        uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2 # v4.0.0
+        with:
+          path: .docker
+          key: maven-${{ hashFiles('java/**') }}
+          restore-keys: maven-
+      - name: Execute Docker Build
+        env:
+          DEVELOCITY_ACCESS_KEY: ${{ secrets.GE_ACCESS_TOKEN }}
+        run: |
+          docker compose run \
+            -e CI=true \
+            -e "DEVELOCITY_ACCESS_KEY=$DEVELOCITY_ACCESS_KEY" \
+            ${{ matrix.image }}

.gitignore

@@ -21,3 +21,4 @@ arrow-git.properties
 cmake_install.cmake
 install_manifest.txt
 target/
+/.mvn/.develocity/

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "testing"]
+	path = testing
+	url = [email protected]:apache/arrow-testing

arrow-format/File.fbs

@@ -0,0 +1,52 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+include "Schema.fbs";
+
+namespace org.apache.arrow.flatbuf;
+
+/// ----------------------------------------------------------------------
+/// Arrow File metadata
+///
+
+table Footer {
+  version: org.apache.arrow.flatbuf.MetadataVersion;
+
+  schema: org.apache.arrow.flatbuf.Schema;
+
+  dictionaries: [ Block ];
+
+  recordBatches: [ Block ];
+
+  /// User-defined metadata
+  custom_metadata: [ KeyValue ];
+}
+
+struct Block {
+
+  /// Index to the start of the RecordBlock (note this is past the Message header)
+  offset: long;
+
+  /// Length of the metadata
+  metaDataLength: int;
+
+  /// Length of the data (this is aligned so there can be a gap between this and
+  /// the metadata).
+  bodyLength: long;
+}
+
+root_type Footer;