Add Alluxio file system

lib/trino-filesystem-alluxio/pom.xml

@@ -0,0 +1,125 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<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>
+
+    <parent>
+        <groupId>io.trino</groupId>
+        <artifactId>trino-root</artifactId>
+        <version>460-SNAPSHOT</version>
+        <relativePath>../../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>trino-filesystem-alluxio</artifactId>
+    <description>Trino Filesystem - Alluxio</description>
+
+    <properties>
+        <air.main.basedir>${project.parent.basedir}</air.main.basedir>
+        <air.compiler.fail-warnings>true</air.compiler.fail-warnings>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.google.inject</groupId>
+            <artifactId>guice</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>io.trino</groupId>
+            <artifactId>trino-filesystem</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>io.trino</groupId>
+            <artifactId>trino-memory-context</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>io.trino</groupId>
+            <artifactId>trino-spi</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.alluxio</groupId>
+            <artifactId>alluxio-core-client-fs</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.alluxio</groupId>
+            <artifactId>alluxio-core-common</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.alluxio</groupId>
+            <artifactId>alluxio-core-transport</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>com.github.docker-java</groupId>
+            <artifactId>docker-java-api</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>io.airlift</groupId>
+            <artifactId>junit-extensions</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>io.trino</groupId>
+            <artifactId>trino-filesystem</artifactId>
+            <version>${project.version}</version>
+            <classifier>tests</classifier>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>io.trino</groupId>
+            <artifactId>trino-spi</artifactId>
+            <type>test-jar</type>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>io.trino</groupId>
+            <artifactId>trino-testing</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>io.trino</groupId>
+            <artifactId>trino-testing-containers</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.testcontainers</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.testcontainers</groupId>
+            <artifactId>testcontainers</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>

lib/trino-filesystem-alluxio/src/main/java/io/trino/filesystem/alluxio/AlluxioFileIterator.java

@@ -0,0 +1,64 @@
+/*
+ * Licensed 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.
+ */
+package io.trino.filesystem.alluxio;
+
+import alluxio.client.file.URIStatus;
+import io.trino.filesystem.FileEntry;
+import io.trino.filesystem.FileIterator;
+import io.trino.filesystem.Location;
+
+import java.io.IOException;
+import java.time.Instant;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Optional;
+
+import static io.trino.filesystem.alluxio.AlluxioUtils.convertToLocation;
+import static java.util.Objects.requireNonNull;
+
+public class AlluxioFileIterator
+        implements FileIterator
+{
+    private final Iterator<URIStatus> files;
+    private final String mountRoot;
+
+    public AlluxioFileIterator(List<URIStatus> files, String mountRoot)
+    {
+        this.files = requireNonNull(files.iterator(), "files is null");
+        this.mountRoot = requireNonNull(mountRoot, "mountRoot is null");
+    }
+
+    @Override
+    public boolean hasNext()
+            throws IOException
+    {
+        return files.hasNext();
+    }
+
+    @Override
+    public FileEntry next()
+            throws IOException
+    {
+        if (!hasNext()) {
+            return null;
+        }
+        URIStatus fileStatus = files.next();
+        Location location = convertToLocation(fileStatus, mountRoot);
+        return new FileEntry(
+                location,
+                fileStatus.getLength(),
+                Instant.ofEpochMilli(fileStatus.getLastModificationTimeMs()),
+                Optional.empty());
+    }
+}