org.jvnet.hk2.internal.ServiceHandleImpl Maven / Gradle / Ivy
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package org.jvnet.hk2.internal;
import java.util.LinkedList;
import java.util.List;
import org.glassfish.hk2.api.ActiveDescriptor;
import org.glassfish.hk2.api.Context;
import org.glassfish.hk2.api.Injectee;
import org.glassfish.hk2.api.PerLookup;
import org.glassfish.hk2.api.ServiceHandle;
import org.glassfish.hk2.utilities.reflection.ReflectionHelper;
/**
* This handle does the underlying work of getting the service. Only
* at the time that the getService call is made is the service gotten
* from the context. Once a service has been gotten, it is not looked
* up again.
*
* @author jwells
* @param The type of service to create
*
*/
public class ServiceHandleImpl implements ServiceHandle {
private ActiveDescriptor root;
private final ServiceLocatorImpl locator;
private final Injectee injectee;
private final Object lock = new Object();
private boolean serviceDestroyed = false;
private boolean serviceSet = false;
private T service;
private Object serviceData;
private final List> subHandles = new LinkedList>();
/* package */ ServiceHandleImpl(ServiceLocatorImpl locator, ActiveDescriptor root, Injectee injectee) {
this.root = root;
this.locator = locator;
this.injectee = injectee;
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.ServiceHandle#getService()
*/
@Override
public T getService() {
return getService(this);
}
/* package */ T getService(ServiceHandle handle) {
if (root instanceof Closeable) {
Closeable closeable = (Closeable) root;
if (closeable.isClosed()) {
throw new IllegalStateException("This service has been unbound: " + root);
}
}
synchronized (lock) {
if (serviceDestroyed) throw new IllegalStateException("Service has been disposed");
if (serviceSet) return service;
Class requiredClass = (injectee == null) ? null : ReflectionHelper.getRawClass(injectee.getRequiredType());
service = Utilities.createService(root, injectee, locator, handle, requiredClass);
serviceSet = true;
return service;
}
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.ServiceHandle#getActiveDescriptor()
*/
@Override
public ActiveDescriptor getActiveDescriptor() {
return root;
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.ServiceHandle#isActive()
*/
@Override
public boolean isActive() {
// No lock needed, nothing changes state
if (serviceDestroyed) return false;
if (serviceSet) return true;
try {
Context context = locator.resolveContext(root.getScopeAnnotation());
return context.containsKey(root);
}
catch (IllegalStateException ise) {
return false;
}
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.ServiceHandle#destroy()
*/
@Override
public void destroy() {
boolean localServiceSet;
boolean serviceActive;
if (!root.isReified()) return;
synchronized (lock) {
serviceActive = isActive();
if (serviceDestroyed) return;
serviceDestroyed = true;
localServiceSet = serviceSet;
}
if (root.getScopeAnnotation().equals(PerLookup.class)) {
if (localServiceSet) {
// Otherwise it is the scope responsible for the lifecycle
root.dispose(service);
}
}
else if (serviceActive) {
Context context;
try {
context = locator.resolveContext(root.getScopeAnnotation());
}
catch (Throwable th) {
return;
}
context.destroyOne(root);
}
for (ServiceHandleImpl subHandle : subHandles) {
subHandle.destroy();
}
}
@Override
public void setServiceData(Object serviceData) {
synchronized (lock) {
this.serviceData = serviceData;
}
}
@Override
public Object getServiceData() {
synchronized (lock) {
return serviceData;
}
}
/**
* Add a sub handle to this for proper destruction
*
* @param subHandle A handle to add for proper destruction
*/
public void addSubHandle(ServiceHandleImpl subHandle) {
subHandles.add(subHandle);
}
public String toString() {
return "ServiceHandle(" + root + "," + System.identityHashCode(this) + ")";
}
}