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feat: Support CRaC and priming of powertools batch #2590

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feat: Support CRaC and priming of powertools batch #2590

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25 changes: 25 additions & 0 deletions powertools-batch/pom.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -60,6 +60,10 @@
<artifactId>sdk-core</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.crac</groupId>
<artifactId>crac</artifactId>
</dependency>

<!-- Test dependencies -->
<dependency>
Expand Down Expand Up @@ -94,4 +98,25 @@
</dependency>
</dependencies>

<profiles>
<profile>
<id>generate-classesloaded-file</id>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<argLine>
-Xlog:class+load=info:classesloaded.txt
--add-opens java.base/java.util=ALL-UNNAMED
--add-opens java.base/java.lang=ALL-UNNAMED
</argLine>
</configuration>
</plugin>
</plugins>
</build>
</profile>
</profiles>

</project>
24 changes: 23 additions & 1 deletion ...tch/src/main/java/software/amazon/lambda/powertools/batch/BatchMessageHandlerBuilder.java
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Original file line number Diff line number Diff line change
Expand Up @@ -14,9 +14,13 @@

package software.amazon.lambda.powertools.batch;

import org.crac.Context;
import org.crac.Core;
import org.crac.Resource;
import software.amazon.lambda.powertools.batch.builder.DynamoDbBatchMessageHandlerBuilder;
import software.amazon.lambda.powertools.batch.builder.KinesisBatchMessageHandlerBuilder;
import software.amazon.lambda.powertools.batch.builder.SqsBatchMessageHandlerBuilder;
import software.amazon.lambda.powertools.common.internal.ClassPreLoader;

/**
* A builder-style interface we can use to build batch processing handlers for SQS, Kinesis Streams,
Expand All @@ -27,7 +31,15 @@
*
* @see <a href="https://docs.powertools.aws.dev/lambda/java/utilities/batch/">Powertools for AWS Lambda (Java) Batch Documentation</a>
**/
public class BatchMessageHandlerBuilder {
public class BatchMessageHandlerBuilder implements Resource {

// Dummy instance to register BatchMessageHandlerBuilder with CRaC
private static final BatchMessageHandlerBuilder INSTANCE = new BatchMessageHandlerBuilder();

// Static block to ensure CRaC registration happens at class loading time
static {
Core.getGlobalContext().register(INSTANCE);
}

/**
* Build an SQS-batch message handler.
Expand Down Expand Up @@ -55,4 +67,14 @@ public DynamoDbBatchMessageHandlerBuilder withDynamoDbBatchHandler() {
public KinesisBatchMessageHandlerBuilder withKinesisBatchHandler() {
return new KinesisBatchMessageHandlerBuilder();
}

@Override
public void beforeCheckpoint(Context<? extends Resource> context) throws Exception {
ClassPreLoader.preloadClasses();
}

@Override
public void afterRestore(Context<? extends Resource> context) throws Exception {
// No action needed after restore
}
}
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