Migrating v1 to v2 for uploading images to S3 bucket

[greenenvy17]

Hi everyone,

I was rewriting a part of code that used the version 1.X.X of the aws sdk. We only need to upload or remove images from an S3 bucket in a spring boot project. I was able to produce a working piece of code, but i'm a bit confused by the amount of transitive dependencies that s3 bring with it.

The pom file looks like this:

.
.
.
<dependencyManagement>
     <dependency>
        <groupId>software.amazon.awssdk</groupId>
        <artifactId>s3</artifactId>
        <version>2.30.13</version>
        <exclusions>
          <exclusion>
            <groupId>software.amazon.awssdk</groupId>
            <artifactId>netty-nio-client</artifactId>  
          </exclusion>
        </exclusions>
      </dependency>

      <dependency>
        <groupId>software.amazon.awssdk</groupId>
        <artifactId>aws-core</artifactId>
        <version>2.30.13</version>
      </dependency>

      <dependency>
        <groupId>software.amazon.awssdk</groupId>
        <artifactId>sdk-core</artifactId>
        <version>2.30.13</version>
      </dependency>

      <dependency>
        <groupId>software.amazon.awssdk</groupId>
        <artifactId>auth</artifactId>
        <version>2.30.13</version>
      </dependency>

      <dependency>
        <groupId>software.amazon.awssdk</groupId>
        <artifactId>http-client-spi</artifactId>
        <version>2.30.13</version>
      </dependency>

      <dependency>
        <groupId>software.amazon.awssdk</groupId>
        <artifactId>regions</artifactId>
        <version>2.30.13</version>
      </dependency>
</dependencyManagement>
.
.
.
<dependencies>
    <dependency>
      <groupId>software.amazon.awssdk</groupId>
      <artifactId>s3</artifactId>
    </dependency>

    <dependency>
      <groupId>software.amazon.awssdk</groupId>
      <artifactId>aws-core</artifactId>
    </dependency>

    <dependency>
      <groupId>software.amazon.awssdk</groupId>
      <artifactId>sdk-core</artifactId>
    </dependency>

    <dependency>
      <groupId>software.amazon.awssdk</groupId>
      <artifactId>auth</artifactId>
    </dependency>

    <dependency>
      <groupId>software.amazon.awssdk</groupId>
      <artifactId>http-client-spi</artifactId>
    </dependency>

    <dependency>
      <groupId>software.amazon.awssdk</groupId>
      <artifactId>regions</artifactId>
    </dependency>
</dependencies>

When i execute mvn dependency:tree i see a lot of deps for s3

Can something of the transitive dependencies be omitted or should all stay there?

Let me know if you need the part of code related to the S3Client and it's use.

Thanks in advance!

[debora-ito]

They should all be there, but you don't have to explicitly add them to the pom.

All you need to add is the service module (s3 in this case), and the SDK will include its inner dependencies.

So try this:

<properties>
    <aws.java.sdk.version>2.30.13</aws.java.sdk.version>
</properties>

<dependencyManagement>
    <dependency>
        <groupId>software.amazon.awssdk</groupId>
        <artifactId>bom</artifactId>
        <version>${aws.java.sdk.version}</version>
        <type>pom</type>
        <scope>import</scope>
    </dependency>
</dependencyManagement>
.
.
.
<dependencies>
    <dependency>
        <groupId>software.amazon.awssdk</groupId>
        <artifactId>s3</artifactId>
        <exclusions>
            <exclusion>
                <groupId>software.amazon.awssdk</groupId>
                <artifactId>netty-nio-client</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
<dependencies>

Note that the artifactId in <DependencyManagement> should be bom, and netty-nio-client is being explicitly excluded in this example, so if you try to use the s3 async client it will thrown an exception saying it could not load an async http implementation from the classpath.

Relevant documentation:

• Declare the SDK as a dependency (link)
• Http clients (link)