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[FLUSS-2686] Add COS filesystem support #2836

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[FLUSS-2686] Add COS filesystem support #2836

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b813d7e
[FLUSS-2686] Add COS filesystem support
XuQianJin-Stars Mar 10, 2026
e1086d1
[FLUSS-2686] Add COS filesystem support
XuQianJin-Stars Mar 12, 2026
460e379
fix some comments
XuQianJin-Stars Mar 22, 2026
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250 changes: 250 additions & 0 deletions fluss-filesystems/fluss-fs-cos/pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
<!--
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.
-->

<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>org.apache.fluss</groupId>
<artifactId>fluss-filesystems</artifactId>
<version>0.10-SNAPSHOT</version>
</parent>

<artifactId>fluss-fs-cos</artifactId>
<name>Fluss : FileSystems : COS FS</name>

<properties>
<fs.cosn.sdk.version>3.3.5</fs.cosn.sdk.version>
<fs.cos.api.version>5.6.139</fs.cos.api.version>
</properties>

<dependencies>
<dependency>
<groupId>org.apache.fluss</groupId>
<artifactId>fluss-common</artifactId>
<version>${project.version}</version>
<scope>provided</scope>
</dependency>

<dependency>
<groupId>org.apache.fluss</groupId>
<artifactId>fluss-fs-hadoop-shaded</artifactId>
<version>${project.version}</version>
</dependency>

<dependency>
<groupId>org.apache.fluss</groupId>
<artifactId>fluss-fs-hadoop</artifactId>
<version>${project.version}</version>
</dependency>

<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-cos</artifactId>
<version>${fs.cosn.sdk.version}</version>
<exclusions>
<exclusion>
<groupId>com.qcloud</groupId>
<artifactId>cos_api</artifactId>
</exclusion>
<exclusion>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
</exclusion>
<exclusion>
<groupId>ch.qos.reload4j</groupId>
<artifactId>reload4j</artifactId>
</exclusion>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-reload4j</artifactId>
</exclusion>
</exclusions>
</dependency>

<dependency>
<groupId>com.qcloud</groupId>
<artifactId>cos_api</artifactId>
<version>${fs.cos.api.version}</version>
<exclusions>
<exclusion>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
</exclusion>
</exclusions>
</dependency>

<dependency>
<!-- Hadoop requires jaxb-api for javax.xml.bind.JAXBException -->
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>${jaxb.api.version}</version>
<!-- packaged as an optional dependency that is only accessible on Java 11+ -->
<scope>provided</scope>
</dependency>

<dependency>
<groupId>org.apache.fluss</groupId>
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@leekeiabstraction leekeiabstraction Mar 18, 2026

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Should this be in test scope?

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@XuQianJin-Stars XuQianJin-Stars Mar 22, 2026

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Should this be in test scope?

The test scope for fluss-test-utils is already defined in the parent pom's dependencyManagement section (line 336 in root pom.xml), so child modules inherit it automatically without needing to declare test explicitly. This is consistent with how other filesystem modules (oss, s3, gs, azure, obs, hdfs) declare this dependency.

<artifactId>fluss-test-utils</artifactId>
</dependency>
<!-- for the behavior test suite -->
<dependency>
<groupId>org.apache.fluss</groupId>
<artifactId>fluss-common</artifactId>
<version>${project.version}</version>
<scope>test</scope>
<type>test-jar</type>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<executions>
<execution>
<id>default-jar</id>
<goals>
<goal>jar</goal>
</goals>
</execution>
<execution>
<id>test-jar</id>
<goals>
<goal>test-jar</goal>
</goals>
</execution>
</executions>
<configuration>
<archive>
<manifestEntries>
<!-- jaxb-api is packaged as an optional dependency that is only accessible on Java 11 -->
<Multi-Release>true</Multi-Release>
</manifestEntries>
</archive>
</configuration>
</plugin>
Comment on lines +119 to +144
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Copilot AI Mar 11, 2026

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The same maven-jar-plugin is declared twice. This is easy to misread and can lead to configuration being overridden unexpectedly depending on Maven’s model merging. Consider merging the jar and test-jar executions into a single maven-jar-plugin declaration so the Multi-Release manifest configuration applies consistently.

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<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>copy-javax-jars</id>
<phase>process-resources</phase>
<goals>
<goal>copy</goal>
</goals>
</execution>
</executions>
<configuration>
<artifactItems>
<artifactItem>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>${jaxb.api.version}</version>
<type>jar</type>
<overWrite>true</overWrite>
</artifactItem>
</artifactItems>
<outputDirectory>${project.build.directory}/temporary</outputDirectory>
</configuration>
</plugin>

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<executions>
<execution>
<id>unpack-javax-libraries</id>
<phase>process-resources</phase>
<goals>
<goal>run</goal>
</goals>
<configuration>
<target>
<echo message="unpacking javax jars"/>
<unzip dest="${project.build.directory}/classes/META-INF/versions/11">
<fileset dir="${project.build.directory}/temporary">
<include name="*"/>
</fileset>
</unzip>
</target>
</configuration>
</execution>
</executions>
</plugin>

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<executions>
<execution>
<id>shade-fluss</id>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<artifactSet>
<includes>
<include>*:*</include>
</includes>
<excludes>
<exclude>javax.servlet:servlet-api</exclude>
<exclude>xmlenc:xmlenc</exclude>
</excludes>
</artifactSet>
<filters>
<filter>
<artifact>*</artifact>
<excludes>
<exclude>.gitkeep</exclude>
<exclude>mime.types</exclude>
<exclude>mozilla/**</exclude>
<exclude>LICENSE.txt</exclude>
<exclude>license/LICENSE*</exclude>
<exclude>okhttp3/internal/publicsuffix/NOTICE</exclude>
<exclude>NOTICE</exclude>
</excludes>
</filter>
<filter>
<artifact>org.apache.fluss:fluss-fs-hadoop</artifact>
<excludes>
<exclude>META-INF/**</exclude>
</excludes>
</filter>
</filters>
<relocations>
<relocation>
<pattern>org.apache.commons</pattern>
<shadedPattern>org.apache.fluss.shaded.org.apache.commons</shadedPattern>
</relocation>
</relocations>
</configuration>
</execution>
</executions>
</plugin>

</plugins>
</build>

</project>
64 changes: 64 additions & 0 deletions fluss-filesystems/fluss-fs-cos/src/main/java/org/apache/fluss/fs/cos/COSFileSystem.java
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/*
* 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.
*/

package org.apache.fluss.fs.cos;

import org.apache.fluss.fs.cos.token.COSSecurityTokenProvider;
import org.apache.fluss.fs.hdfs.HadoopFileSystem;
import org.apache.fluss.fs.token.ObtainedSecurityToken;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;

import java.io.IOException;

/**
* A {@link FileSystem} for Tencent Cloud COS that wraps an {@link HadoopFileSystem}, but overwrite
* method to generate access security token.
*/
class COSFileSystem extends HadoopFileSystem {

private final Configuration conf;
private volatile COSSecurityTokenProvider cosSecurityTokenProvider;
private final String scheme;

COSFileSystem(FileSystem hadoopFileSystem, String scheme, Configuration conf) {
super(hadoopFileSystem);
this.scheme = scheme;
this.conf = conf;
}

@Override
public ObtainedSecurityToken obtainSecurityToken() throws IOException {
try {
mayCreateSecurityTokenProvider();
return cosSecurityTokenProvider.obtainSecurityToken(scheme);
} catch (Exception e) {
throw new IOException(e);
}
}

private void mayCreateSecurityTokenProvider() throws IOException {
if (cosSecurityTokenProvider == null) {
synchronized (this) {
if (cosSecurityTokenProvider == null) {
cosSecurityTokenProvider = new COSSecurityTokenProvider(conf);
}
}
}
}
}
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