net.jqwik.engine.support.LazyServiceLoaderCache Maven / Gradle / Ivy
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package net.jqwik.engine.support;
import java.util.*;
import java.util.concurrent.*;
import java.util.logging.*;
public class LazyServiceLoaderCache {
private static final Logger LOG = Logger.getLogger(LazyServiceLoaderCache.class.getName());
private final Class clz;
private List services;
public LazyServiceLoaderCache(Class clz) {
this.clz = clz;
}
public List getServices() {
if (services == null) {
loadServices();
}
return services;
}
private synchronized void loadServices() {
services = new CopyOnWriteArrayList<>();
try {
for (S s : ServiceLoader.load(clz)) {
services.add(s);
}
} catch (ServiceConfigurationError serviceConfigurationError) {
String message = String.format(
"Cannot load services of type [%s].%n %s",
clz.getName(),
serviceConfigurationError.getMessage()
);
LOG.log(Level.SEVERE, message);
}
}
}