/**
 * Superclass template for actions that only work for Build.
 *
 * If an action of this type receives a command that is not Build it will throw an exception.
 */
public abstract class BuildCommandOnly implements DaemonCommandAction {

    @Override
    public void execute(DaemonCommandExecution execution) {
        Command command = execution.getCommand();
        if (!(command instanceof Build)) {

/**
 * Updates the daemon idle/busy status, sending a DaemonUnavailable result back to the client if the daemon is busy.
 */
public class StartBuildOrRespondWithBusy extends BuildCommandOnly {
    
    private static final Logger LOGGER = Logging.getLogger(StartBuildOrRespondWithBusy.class);
    private final DaemonDiagnostics diagnostics;

import org.gradle.launcher.exec.BuildActionResult;

/**
 * Actually executes the build.
 *
 * Typically the last action in the pipeline.
 */
public class ExecuteBuild extends BuildCommandOnly {

    private static final Logger LOGGER = Logging.getLogger(ExecuteBuild.class);

    final private BuildActionExecutor<BuildActionParameters, BuildRequestContext> actionExecuter;

import java.util.Locale;
import java.util.Map;
import java.util.Properties;

/**
 * Aims to make the local environment the same as the client's environment.
 */
public class EstablishBuildEnvironment extends BuildCommandOnly {
    private final static Logger LOGGER = Logging.getLogger(EstablishBuildEnvironment.class);

    private final ProcessEnvironment processEnvironment;

 * However, the next build is not allowed to start until the cleanup is finished.
 */
@NonNullApi
public class CleanUpVirtualFileSystemAfterBuild extends BuildCommandOnly implements Stoppable {
    private static final Logger LOGGER = LoggerFactory.getLogger(CleanUpVirtualFileSystemAfterBuild.class);

    private final GradleUserHomeScopeServiceRegistry userHomeServiceRegistry;

import org.gradle.launcher.daemon.server.api.DaemonConnection;

import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.CountDownLatch;

public class LogToClient extends BuildCommandOnly {

    public static final String DISABLE_OUTPUT = "org.gradle.daemon.disable-output";
    private static final Logger LOGGER = Logging.getLogger(LogToClient.class);

Class <org.gradle.launcher.daemon.server.exec.BuildCommandOnly> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (BuildCommandOnly.java:0)