import org.gradle.tooling.events.FinishEvent;
import org.gradle.tooling.events.OperationCompletionListener;
import org.gradle.tooling.events.task.TaskFinishEvent;

public abstract class TaskEventsService implements BuildService<BuildServiceParameters.None>,
    OperationCompletionListener { // <1>

    @Override
    public void onFinish(FinishEvent finishEvent) {

    @Override
    public void apply(Project project) {
        Provider<TaskEventsService> serviceProvider =
            project.getGradle().getSharedServices().registerIfAbsent(
                "taskEvents", TaskEventsService.class, spec -> {}); // <2>

        getEventsListenerRegistry().onTaskCompletion(serviceProvider); // <3>
    }

====
[source.multi-language-sample,java]
.TaskEventsService.java
----
include::{snippetsPath}/plugins/buildServiceListener/groovy/buildSrc/src/main/java/TaskEventsService.java[tags=build-service]
----
====
<1> Implement the `OperationCompletionListener` interface and the `BuildService` interface.