org.glassfish.hk2.utilities.ImmediateContext Maven / Gradle / Ivy
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package org.glassfish.hk2.utilities;
import java.lang.annotation.Annotation;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import javax.inject.Inject;
import javax.inject.Singleton;
import org.glassfish.hk2.api.ActiveDescriptor;
import org.glassfish.hk2.api.Context;
import org.glassfish.hk2.api.DescriptorVisibility;
import org.glassfish.hk2.api.Filter;
import org.glassfish.hk2.api.Immediate;
import org.glassfish.hk2.api.MultiException;
import org.glassfish.hk2.api.ServiceHandle;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.hk2.api.Visibility;
import org.glassfish.hk2.internal.HandleAndService;
import org.glassfish.hk2.internal.ImmediateLocalLocatorFilter;
/**
* This is the {@link Context} implementation for the {@link Immediate}
* scope
*
* @author jwells
*
*/
@Singleton @Visibility(DescriptorVisibility.LOCAL)
public class ImmediateContext implements Context{
private final HashMap, HandleAndService> currentImmediateServices = new HashMap, HandleAndService>();
private final HashMap, Long> creating = new HashMap, Long>();
private final ServiceLocator locator;
private final Filter validationFilter;
@Inject
private ImmediateContext(ServiceLocator locator) {
this.locator = locator;
validationFilter = new ImmediateLocalLocatorFilter(locator.getLocatorId());
}
@Override
public Class getScope() {
return Immediate.class;
}
/**
* @param activeDescriptor The descriptor to create
* @param root The root handle
* @return The service
*/
@Override
@SuppressWarnings("unchecked")
public U findOrCreate(ActiveDescriptor activeDescriptor,
ServiceHandle root) {
U retVal = null;
synchronized (this) {
HandleAndService has = currentImmediateServices.get(activeDescriptor);
if (has != null) {
return (U) has.getService();
}
while (creating.containsKey(activeDescriptor)) {
long alreadyCreatingThread = creating.get(activeDescriptor);
if (alreadyCreatingThread == Thread.currentThread().getId()) {
throw new MultiException(new IllegalStateException(
"A circular dependency involving Immediate service " + activeDescriptor.getImplementation() +
" was found. Full descriptor is " + activeDescriptor));
}
try {
this.wait();
}
catch (InterruptedException ie) {
throw new MultiException(ie);
}
}
has = currentImmediateServices.get(activeDescriptor);
if (has != null) {
return (U) has.getService();
}
creating.put(activeDescriptor, Thread.currentThread().getId());
}
try {
retVal = activeDescriptor.create(root);
}
finally {
synchronized (this) {
ServiceHandle discoveredRoot = null;
if (root != null) {
if (root.getActiveDescriptor().equals(activeDescriptor)) {
discoveredRoot = root;
}
}
if (retVal != null) {
currentImmediateServices.put(activeDescriptor, new HandleAndService(discoveredRoot, retVal));
}
creating.remove(activeDescriptor);
this.notifyAll();
}
}
return retVal;
}
/**
* @param descriptor The descriptor to find
* @return true if this service has been created
*/
@Override
public synchronized boolean containsKey(ActiveDescriptor descriptor) {
return currentImmediateServices.containsKey(descriptor);
}
@Override
public void destroyOne(ActiveDescriptor descriptor) {
destroyOne(descriptor, null);
}
/**
* Destroys a single descriptor
*
* @param descriptor The descriptor to destroy
* @param errorHandlers The handlers for exceptions (if null will get from service locator)
*/
@SuppressWarnings("unchecked")
private void destroyOne(ActiveDescriptor descriptor, List errorHandlers) {
if (errorHandlers == null) {
errorHandlers = locator.getAllServices(ImmediateErrorHandler.class);
}
synchronized (this) {
HandleAndService has = currentImmediateServices.remove(descriptor);
Object instance = has.getService();
try {
((ActiveDescriptor