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package org.glassfish.jersey.server.spring;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletContext;
import org.glassfish.hk2.api.DynamicConfiguration;
import org.glassfish.hk2.api.Factory;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.hk2.utilities.ServiceLocatorUtilities;
import org.glassfish.hk2.utilities.binding.ServiceBindingBuilder;
import org.glassfish.jersey.internal.inject.Injections;
import org.glassfish.jersey.server.ApplicationHandler;
import org.glassfish.jersey.server.spi.ComponentProvider;
import org.jvnet.hk2.spring.bridge.api.SpringBridge;
import org.jvnet.hk2.spring.bridge.api.SpringIntoHK2Bridge;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.stereotype.Component;
import org.springframework.web.context.support.WebApplicationContextUtils;
/**
* Custom ComponentProvider class.
* Responsible for 1) bootstrapping Jersey 2 Spring integration and
* 2) making Jersey skip JAX-RS Spring component life-cycle management and leave it to us.
*
* @author Marko Asplund (marko.asplund at yahoo.com)
*/
public class SpringComponentProvider implements ComponentProvider {
private static final Logger LOGGER = Logger.getLogger(SpringComponentProvider.class.getName());
private static final String DEFAULT_CONTEXT_CONFIG_LOCATION = "applicationContext.xml";
private static final String PARAM_CONTEXT_CONFIG_LOCATION = "contextConfigLocation";
private static final String PARAM_SPRING_CONTEXT = "contextConfig";
private volatile ServiceLocator locator;
private volatile ApplicationContext ctx;
@Override
public void initialize(ServiceLocator locator) {
this.locator = locator;
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine(LocalizationMessages.CTX_LOOKUP_STARTED());
}
ServletContext sc = locator.getService(ServletContext.class);
if(sc != null) {
// servlet container
ctx = WebApplicationContextUtils.getWebApplicationContext(sc);
} else {
// non-servlet container
ctx = createSpringContext();
}
if(ctx == null) {
LOGGER.severe(LocalizationMessages.CTX_LOOKUP_FAILED());
return;
}
LOGGER.config(LocalizationMessages.CTX_LOOKUP_SUCESSFUL());
// initialize HK2 spring-bridge
SpringBridge.getSpringBridge().initializeSpringBridge(locator);
SpringIntoHK2Bridge springBridge = locator.getService(SpringIntoHK2Bridge.class);
springBridge.bridgeSpringBeanFactory(ctx);
// register Spring @Autowired annotation handler with HK2 ServiceLocator
ServiceLocatorUtilities.addOneConstant(locator, new AutowiredInjectResolver(ctx));
ServiceLocatorUtilities.addOneConstant(locator, ctx, "SpringContext", ApplicationContext.class);
LOGGER.config(LocalizationMessages.SPRING_COMPONENT_PROVIDER_INITIALIZED());
}
// detect JAX-RS classes that are also Spring @Components.
// register these with HK2 ServiceLocator to manage their lifecycle using Spring.
@Override
public boolean bind(Class<?> component, Set<Class<?>> providerContracts) {
if (ctx == null) {
return false;
}
if(AnnotationUtils.findAnnotation(component, Component.class) != null) {
DynamicConfiguration c = Injections.getConfiguration(locator);
String[] beanNames = ctx.getBeanNamesForType(component);
if(beanNames == null || beanNames.length != 1) {
LOGGER.severe(LocalizationMessages.NONE_OR_MULTIPLE_BEANS_AVAILABLE(component));
return false;
}
String beanName = beanNames[0];
ServiceBindingBuilder bb = Injections.newFactoryBinder(new SpringComponentProvider.SpringManagedBeanFactory(ctx, locator, beanName));
bb.to(component);
Injections.addBinding(bb, c);
c.commit();
LOGGER.config(LocalizationMessages.BEAN_REGISTERED(beanName));
return true;
}
return false;
}
@Override
public void done() {
}
private ApplicationContext createSpringContext() {
ApplicationHandler applicationHandler = locator.getService(ApplicationHandler.class);
ApplicationContext springContext = (ApplicationContext) applicationHandler.getConfiguration().getProperty(PARAM_SPRING_CONTEXT);
if (springContext == null) {
String contextConfigLocation = (String) applicationHandler.getConfiguration().getProperty(PARAM_CONTEXT_CONFIG_LOCATION);
springContext = createXmlSpringConfiguration(contextConfigLocation);
}
return springContext;
}
private ApplicationContext createXmlSpringConfiguration(String contextConfigLocation) {
if (contextConfigLocation == null) {
contextConfigLocation = DEFAULT_CONTEXT_CONFIG_LOCATION;
}
return ctx = new ClassPathXmlApplicationContext(contextConfigLocation, "jersey-spring-applicationContext.xml");
}
private static class SpringManagedBeanFactory implements Factory {
private final ApplicationContext ctx;
private final ServiceLocator locator;
private final String beanName;
private SpringManagedBeanFactory(ApplicationContext ctx, ServiceLocator locator, String beanName) {
this.ctx = ctx;
this.locator = locator;
this.beanName = beanName;
}
@Override
public Object provide() {
Object bean = ctx.getBean(beanName);
locator.inject(bean);
return bean;
}
@Override
public void dispose(Object instance) {
}
}
}