io.robe.guice.JerseyUtil Maven / Gradle / Ivy
package io.robe.guice;
import com.google.inject.Injector;
import com.google.inject.Key;
import com.google.inject.servlet.GuiceFilter;
import io.dropwizard.jersey.setup.JerseyEnvironment;
import io.dropwizard.setup.Environment;
import org.glassfish.jersey.server.model.Resource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.ws.rs.Path;
import java.lang.reflect.Type;
//Copied from https://github.com/HubSpot/dropwizard-guice/blob/master/src/main/java/com/hubspot/dropwizard/guice/JerseyUtil.java;
/**
* Functionality used to help link Guice with Jersey
*/
public class JerseyUtil {
private static final Logger logger = LoggerFactory.getLogger(JerseyUtil.class);
/**
* Registers any Guice-bound providers or root resources.
*/
public static void registerGuiceBound(Injector injector, final JerseyEnvironment environment) {
while (injector != null) {
for (Key key : injector.getBindings().keySet()) {
Type type = key.getTypeLiteral().getType();
if (type instanceof Class) {
Class c = (Class) type;
if (isProviderClass(c)) {
logger.info("Registering {} as a provider class", c.getName());
environment.register(c);
} else if (isRootResourceClass(c)) {
// Jersey rejects resources that it doesn't think are acceptable
// Including abstract classes and interfaces, even if there is a valid Guice binding.
if (Resource.isAcceptable(c)) {
logger.info("Registering {} as a root resource class", c.getName());
environment.register(c);
} else {
logger.warn("Class {} was not registered as a resource. Bind a concrete implementation instead.", c.getName());
}
}
}
}
injector = injector.getParent();
}
}
private static boolean isProviderClass(Class c) {
return c != null && c.isAnnotationPresent(javax.ws.rs.ext.Provider.class);
}
private static boolean isRootResourceClass(Class c) {
if (c == null) {
return false;
}
if (c.isAnnotationPresent(Path.class)) {
return true;
}
for (Class i : c.getInterfaces()) {
if (i.isAnnotationPresent(Path.class)) {
return true;
}
}
return false;
}
public static void registerGuiceFilter(Environment environment) {
environment.servlets().addFilter("Guice Filter", GuiceFilter.class)
.addMappingForUrlPatterns(null, false, environment.getApplicationContext().getContextPath() + "*");
}
}