Package org.scoverage.plugin

Class SCoverageAggregationCoordinator

java.lang.Object

org.scoverage.plugin.SCoverageAggregationCoordinator

public class SCoverageAggregationCoordinator
extends Object

Coordinates aggregated coverage report generation in multi-threaded Maven builds.
Uses RepositorySystemSession.getData() which provides build-global, thread-safe storage that works across different plugin classloaders and all modules in the reactor.
Only stores standard Java types (ConcurrentHashMap, AtomicBoolean) loaded by the bootstrap classloader to avoid ClassCastException across different plugin classloaders.
Ensures that:

• Only one thread (the last module) performs the aggregation
• Other threads skip aggregation and continue

Implementation Note: Uses synchronized block with SessionData.get()/set() instead of computeIfAbsent() for backward compatibility with Maven 3.6.3+ (computeIfAbsent was added in Maven Resolver 1.9.x / Maven 3.9.x).

Constructor Summary

Constructors

Constructor	Description
SCoverageAggregationCoordinator()

Method Summary

Modifier and Type	Method	Description
static boolean	shouldPerformAggregation(org.eclipse.aether.RepositorySystemSession repositorySession, String moduleId, Set<String> expectedModuleIds)	Notifies the coordinator that this module has completed testing and determines if it should perform aggregation.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SCoverageAggregationCoordinator

public SCoverageAggregationCoordinator()

Method Details

shouldPerformAggregation

public static boolean shouldPerformAggregation(org.eclipse.aether.RepositorySystemSession repositorySession,
 String moduleId,
 Set<String> expectedModuleIds)

Notifies the coordinator that this module has completed testing and determines if it should perform aggregation. Only the last module to complete (in a parallel build) will return true, and only once.

Parameters:

repositorySession - Repository system session providing build-global storage

moduleId - unique identifier for the module (e.g., groupId:artifactId)

expectedModuleIds - set of expected module IDs (auto-registers build if needed)

Returns:

true if this module should perform aggregation, false otherwise