Liferay Groovy Verify if Master

LiferayIsMaster.groovy

#https://liferay.dev/blogs/-/blogs/how-to-diagnose-and-recover-liferay-cluster

import com.liferay.portal.kernel.cache.MultiVMPool;
import com.liferay.registry.RegistryUtil;
import com.liferay.registry.Registry;
import com.liferay.portal.kernel.cache.PortalCache;
import com.liferay.registry.ServiceReference;
import com.liferay.portal.kernel.cluster.ClusterExecutorUtil;
import com.liferay.portal.kernel.cluster.ClusterMasterExecutorUtil;

private MultiVMPool getMultiVMPool() {
    Registry registry = RegistryUtil.getRegistry();

    ServiceReference serviceReference = registry.getServiceReference(MultiVMPool.class);

    return registry.getService(serviceReference);
}

out.println("=== Execution in: " + ClusterExecutorUtil.getLocalClusterNode());
out.println("=== isMaster: "+ ClusterMasterExecutorUtil.isMaster());