We will create a Java Maven project and set the parent as serverless-cookbook-parent-aws-java.
- Create a Java Maven project and set dependencies:
<parent>
<groupId>tech.heartin.books.serverlesscookbook</groupId>
<artifactId>serverless-cookbook-parent-aws-java</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
- Specify dependencies in the POM file:
<dependencies>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-lambda-java-core</artifactId>
<version>${aws.lambda.java.core.version}</version>
</dependency>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk-iam</artifactId>
<version>${aws.sdk.version}</version>
</dependency>
</dependencies>
Do not directly define the whole AWS Java SDK (aws-java-sdk) dependency for a Lambda handler. Instead, only declare the dependencies you need (such as aws-java-sdk-iam). I tried adding aws-java-sdk to our Lambda and generated the Uber JAR. It was around 93 MB. AWS console did not allow me to upload the file manually into the Lambda function as the limit was 50MB. So, I uploaded it to S3. However, it failed again while extracting the JAR as the size of the extracted contents exceeded the allowed size of 262144000 bytes.