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package org.glassfish.jersey.model.internal;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.ws.rs.ConstrainedTo;
import javax.ws.rs.RuntimeType;
import javax.ws.rs.core.Configuration;
import javax.ws.rs.core.Feature;
import javax.ws.rs.core.FeatureContext;
import org.glassfish.jersey.ExtendedConfig;
import org.glassfish.jersey.internal.LocalizationMessages;
import org.glassfish.jersey.internal.inject.Injections;
import org.glassfish.jersey.internal.inject.Providers;
import org.glassfish.jersey.internal.spi.AutoDiscoverable;
import org.glassfish.jersey.internal.util.PropertiesHelper;
import org.glassfish.jersey.model.ContractProvider;
import org.glassfish.jersey.process.Inflector;
import org.glassfish.hk2.api.DynamicConfiguration;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.hk2.utilities.Binder;
import com.google.common.base.Function;
import com.google.common.base.Predicate;
import com.google.common.collect.Collections2;
import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
/**
* Common immutable {@link javax.ws.rs.core.Configuration} implementation for
* server and client.
*
* @author Michal Gajdos (michal.gajdos at oracle.com)
* @author Marek Potociar (marek.potociar at oracle.com)
*/
public class CommonConfig implements FeatureContext, ExtendedConfig {
private static final Logger LOGGER = Logger.getLogger(CommonConfig.class.getName());
private static final Function<Object, Binder> CAST_TO_BINDER = new Function<Object, Binder>() {
@Override
public Binder apply(Object input) {
return Binder.class.cast(input);
}
};
/**
* Configuration runtime type.
*/
private final RuntimeType type;
/**
* Configuration properties collection and it's immutable views.
*/
private final Map<String, Object> properties;
private final Map<String, Object> immutablePropertiesView;
private final Collection<String> immutablePropertyNames;
/**
* Configured providers, does not include features and binders.
*/
private final ComponentBag componentBag;
/**
* Collection of unprocessed feature registrations.
*/
private final List<FeatureRegistration> newFeatureRegistrations;
/**
* Collection of enabled feature classes.
*/
private final Set<Class<? extends Feature>> enabledFeatureClasses;
/**
* Collection of enabled feature instances.
*/
private final Set<Feature> enabledFeatures;
/**
* A single feature registration record.
*/
private static final class FeatureRegistration {
private final Class<? extends Feature> featureClass;
private final Feature feature;
private FeatureRegistration(final Class<? extends Feature> featureClass) {
this.featureClass = featureClass;
this.feature = null;
}
private FeatureRegistration(final Feature feature) {
this.featureClass = feature.getClass();
this.feature = feature;
}
/**
* Get the registered feature class.
*
* @return registered feature class.
*/
public Class<? extends Feature> getFeatureClass() {
return featureClass;
}
/**
* Get the registered feature instance or {@code null} if this is a
* class based feature registration.
*
* @return the registered feature instance or {@code null} if this is a
* class based feature registration.
*/
public Feature getFeature() {
return feature;
}
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof FeatureRegistration)) {
return false;
}
FeatureRegistration other = (FeatureRegistration) obj;
return (featureClass == other.featureClass)
|| (feature != null && (feature == other.feature || feature.equals(other.feature)));
}
@Override
public int hashCode() {
int hash = 47;
hash = 13 * hash + (feature != null ? feature.hashCode() : 0);
hash = 13 * hash + (featureClass != null ? featureClass.hashCode() : 0);
return hash;
}
}
/**
* Create a new {@code RuntimeConfig} instance.
* <p>
* The constructor provides a way for defining a {@link ContractProvider contract
* provider model} registration strategy. Once a registration model is built
* for a newly registered contract, the provided registration strategy filter is
* consulted whether the model should be registered or not.
* </p>
* <p>
* Clients can use the method to cancel any contract provider model registration
* that does not meet the criteria of a given configuration context, such as a model
* that does not have any recognized contracts associated with it.
* </p>
*
* @param type configuration runtime type.
* @param registrationStrategy function driving the decision (based on the introspected
* {@link ContractProvider contract provider model}) whether
* or not should the component class registration continue
* towards a successful completion.
*/
public CommonConfig(RuntimeType type, Predicate<ContractProvider> registrationStrategy) {
this.type = type;
this.properties = new HashMap<String, Object>();
this.immutablePropertiesView = Collections.unmodifiableMap(properties);
this.immutablePropertyNames = Collections.unmodifiableCollection(properties.keySet());
this.componentBag = ComponentBag.newInstance(registrationStrategy);
this.newFeatureRegistrations = new LinkedList<FeatureRegistration>();
this.enabledFeatureClasses = Sets.newIdentityHashSet();
this.enabledFeatures = Sets.newHashSet();
}
/**
* Copy constructor.
*
* @param config configurable to copy class properties from.
*/
public CommonConfig(CommonConfig config) {
this.type = config.type;
this.properties = new HashMap<String, Object>(config.properties);
this.immutablePropertiesView = Collections.unmodifiableMap(this.properties);
this.immutablePropertyNames = Collections.unmodifiableCollection(this.properties.keySet());
this.componentBag = config.componentBag.copy();
this.newFeatureRegistrations = Lists.newLinkedList(config.newFeatureRegistrations);
this.enabledFeatureClasses = Sets.newIdentityHashSet();
this.enabledFeatureClasses.addAll(config.enabledFeatureClasses);
this.enabledFeatures = Sets.newHashSet();
this.enabledFeatures.addAll(config.enabledFeatures);
}
@Override
public ExtendedConfig getConfiguration() {
return this;
}
@Override
public RuntimeType getRuntimeType() {
return type;
}
@Override
public Map<String, Object> getProperties() {
return immutablePropertiesView;
}
@Override
public Object getProperty(final String name) {
return properties.get(name);
}
@Override
public boolean isProperty(String name) {
return PropertiesHelper.isProperty(getProperty(name));
}
@Override
public Collection<String> getPropertyNames() {
return immutablePropertyNames;
}
@Override
public boolean isEnabled(final Class<? extends Feature> featureClass) {
return enabledFeatureClasses.contains(featureClass);
}
@Override
public boolean isEnabled(final Feature feature) {
return enabledFeatures.contains(feature);
}
@Override
public boolean isRegistered(Object component) {
return componentBag.getInstances().contains(component);
}
@Override
public boolean isRegistered(Class<?> componentClass) {
return componentBag.getRegistrations().contains(componentClass);
}
@Override
public Map<Class<?>, Integer> getContracts(Class<?> componentClass) {
final ContractProvider model = componentBag.getModel(componentClass);
return (model == null) ? Collections.<Class<?>, Integer>emptyMap() : model.getContractMap();
}
@Override
public Set<Class<?>> getClasses() {
return componentBag.getClasses();
}
@Override
public Set<Object> getInstances() {
return componentBag.getInstances();
}
/**
* Returns a {@link ComponentBag} instance associated with the configuration.
*
* @return a non-null component bag instance.
*/
public final ComponentBag getComponentBag() {
return componentBag;
}
/**
* An extension point that provides a way how to define a custom enhancement/update
* operation of a contract provider model registration being produced for a given
* component class.
* Default implementation return an enhancer just builds the model.
* <p>
* Derived implementations may use this method to e.g. filter out all contracts not
* applicable in the given configuration context or change the model scope. The returned
* set of filtered contracts is then used for the actual provider registration.
* </p>
*
* @param componentClass class of the component being registered.
* @return filter for the contracts that being registered for a given component class.
*/
protected Inflector<ContractProvider.Builder, ContractProvider> getModelEnhancer(final Class<?> componentClass) {
return ComponentBag.AS_IS;
}
/**
* Set the configured properties to the provided map of properties.
*
* @param properties new map of properties to be set.
* @return updated configuration instance.
*/
public CommonConfig setProperties(final Map<String, ?> properties) {
this.properties.clear();
if (properties != null) {
this.properties.putAll(properties);
}
return this;
}
/**
* Add properties to {@code ResourceConfig}.
*
* If any of the added properties exists already, he values of the existing
* properties will be replaced with new values.
*
* @param properties properties to add.
* @return updated configuration instance.
*/
public CommonConfig addProperties(final Map<String, ?> properties) {
if (properties != null) {
this.properties.putAll(properties);
}
return this;
}
@Override
public CommonConfig property(final String name, final Object value) {
if (value == null) {
properties.remove(name);
} else {
properties.put(name, value);
}
return this;
}
@Override
public CommonConfig register(final Class<?> componentClass) {
checkComponentClassNotNull(componentClass);
if (componentBag.register(componentClass, getModelEnhancer(componentClass))) {
processFeatureRegistration(null, componentClass);
}
return this;
}
@Override
public CommonConfig register(final Class<?> componentClass, final int bindingPriority) {
checkComponentClassNotNull(componentClass);
if (componentBag.register(componentClass, bindingPriority, getModelEnhancer(componentClass))) {
processFeatureRegistration(null, componentClass);
}
return this;
}
@Override
public CommonConfig register(final Class<?> componentClass, final Class<?>... contracts) {
checkComponentClassNotNull(componentClass);
if (contracts == null || contracts.length == 0) {
LOGGER.warning(LocalizationMessages.COMPONENT_CONTRACTS_EMPTY_OR_NULL(componentClass));
return this;
}
if (componentBag.register(componentClass, asNewIdentitySet(contracts), getModelEnhancer(componentClass))) {
processFeatureRegistration(null, componentClass);
}
return this;
}
@Override
public CommonConfig register(final Class<?> componentClass, Map<Class<?>, Integer> contracts) {
checkComponentClassNotNull(componentClass);
if (componentBag.register(componentClass, contracts, getModelEnhancer(componentClass))) {
processFeatureRegistration(null, componentClass);
}
return this;
}
@Override
public CommonConfig register(final Object component) {
checkProviderNotNull(component);
final Class<?> componentClass = component.getClass();
if (componentBag.register(component, getModelEnhancer(componentClass))) {
processFeatureRegistration(component, componentClass);
}
return this;
}
@Override
public CommonConfig register(final Object component, final int bindingPriority) {
checkProviderNotNull(component);
final Class<?> componentClass = component.getClass();
if (componentBag.register(component, bindingPriority, getModelEnhancer(componentClass))) {
processFeatureRegistration(component, componentClass);
}
return this;
}
@Override
public CommonConfig register(final Object component, final Class<?>... contracts) {
checkProviderNotNull(component);
final Class<?> componentClass = component.getClass();
if (contracts == null || contracts.length == 0) {
LOGGER.warning(LocalizationMessages.COMPONENT_CONTRACTS_EMPTY_OR_NULL(componentClass));
return this;
}
if (componentBag.register(component, asNewIdentitySet(contracts), getModelEnhancer(componentClass))) {
processFeatureRegistration(component, componentClass);
}
return this;
}
@Override
public CommonConfig register(final Object component, Map<Class<?>, Integer> contracts) {
checkProviderNotNull(component);
final Class<?> componentClass = component.getClass();
if (componentBag.register(component, contracts, getModelEnhancer(componentClass))) {
processFeatureRegistration(component, componentClass);
}
return this;
}
private void processFeatureRegistration(Object component, Class<?> componentClass) {
ContractProvider model = componentBag.getModel(componentClass);
if (model.getContracts().contains(Feature.class)) {
@SuppressWarnings("unchecked")
final FeatureRegistration registration = (component != null) ?
new FeatureRegistration((Feature) component) :
new FeatureRegistration((Class<? extends Feature>) componentClass);
newFeatureRegistrations.add(registration);
}
}
/**
* Load the internal configuration state from an externally provided configuration state.
*
* Calling this method effectively replaces existing configuration state of the instance
* with the state represented by the externally provided configuration.
*
* @param config external configuration state to replace the configuration of this configurable
* instance.
* @return the updated common configuration instance.
*/
public CommonConfig loadFrom(Configuration config) {
setProperties(config.getProperties());
this.enabledFeatures.clear();
this.enabledFeatureClasses.clear();
componentBag.clear();
resetRegistrations();
for (Class<?> cls : config.getClasses()) {
register(cls, config.getContracts(cls));
}
for (Object o : config.getInstances()) {
register(o, config.getContracts(o.getClass()));
}
return this;
}
private Set<Class<?>> asNewIdentitySet(Class<?>... contracts) {
Set<Class<?>> result = Sets.newIdentityHashSet();
result.addAll(Arrays.asList(contracts));
return result;
}
private void checkProviderNotNull(Object provider) {
if (provider == null) {
throw new IllegalArgumentException(LocalizationMessages.COMPONENT_CANNOT_BE_NULL());
}
}
private void checkComponentClassNotNull(Class<?> componentClass) {
if (componentClass == null) {
throw new IllegalArgumentException(LocalizationMessages.COMPONENT_CLASS_CANNOT_BE_NULL());
}
}
/**
* Configure {@link AutoDiscoverable auto-discoverables} in the HK2 service locator.
*
* @param locator locator in which the auto-discoverables should be configured.
*/
public void configureAutoDiscoverableProviders(final ServiceLocator locator) {
for (final AutoDiscoverable autoDiscoverable : Providers.getProviders(locator, AutoDiscoverable.class)) {
final ConstrainedTo constrainedTo = autoDiscoverable.getClass().getAnnotation(ConstrainedTo.class);
if (constrainedTo == null || type.equals(constrainedTo.value())) {
try {
autoDiscoverable.configure(this);
} catch (Exception e) {
LOGGER.log(Level.FINE,
LocalizationMessages.AUTODISCOVERABLE_CONFIGURATION_FAILED(autoDiscoverable.getClass()), e);
}
}
}
}
/**
* Configure HK2 binders in the HK2 service locator and enable JAX-RS features.
*
* @param locator locator in which the binders and features should be configured.
*/
public void configureMetaProviders(final ServiceLocator locator) {
// First, configure existing binders
final Set<Binder> configuredBinders = configureBinders(locator, Collections.<Binder>emptySet());
// Next, configure all features
configureFeatures(
locator,
new HashSet<FeatureRegistration>(),
resetRegistrations());
// At last, configure any new binders added by features
configureBinders(locator, configuredBinders);
}
private Set<Binder> configureBinders(final ServiceLocator locator, final Set<Binder> configured) {
Set<Binder> allConfigured = Sets.newIdentityHashSet();
allConfigured.addAll(configured);
final Collection<Binder> binders = getBinders(configured);
if (!binders.isEmpty()) {
final DynamicConfiguration dc = Injections.getConfiguration(locator);
for (Binder binder : binders) {
binder.bind(dc);
allConfigured.add(binder);
}
dc.commit();
}
return allConfigured;
}
private Collection<Binder> getBinders(final Set<Binder> configured) {
return Collections2.filter(
Collections2.transform(componentBag.getInstances(ComponentBag.BINDERS_ONLY), CAST_TO_BINDER),
new Predicate<Binder>() {
@Override
public boolean apply(Binder binder) {
return !configured.contains(binder);
}
});
}
private void configureFeatures(final ServiceLocator locator,
final Set<FeatureRegistration> processed,
final List<FeatureRegistration> unprocessed) {
for (FeatureRegistration registration : unprocessed) {
if (processed.contains(registration)) {
LOGGER.config(LocalizationMessages.FEATURE_HAS_ALREADY_BEEN_PROCESSED(registration.getFeatureClass()));
continue;
}
Feature feature = registration.getFeature();
if (feature == null) {
feature = locator.create(registration.getFeatureClass());
} else {
locator.inject(feature);
}
if (enabledFeatures.contains(feature)) {
LOGGER.config(LocalizationMessages.FEATURE_HAS_ALREADY_BEEN_PROCESSED(feature));
continue;
}
boolean success = feature.configure(this);
if (success) {
processed.add(registration);
configureFeatures(locator, processed, resetRegistrations());
enabledFeatureClasses.add(registration.getFeatureClass());
enabledFeatures.add(feature);
}
}
}
private List<FeatureRegistration> resetRegistrations() {
List<FeatureRegistration> result = new ArrayList<FeatureRegistration>(newFeatureRegistrations);
newFeatureRegistrations.clear();
return result;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof CommonConfig)) return false;
CommonConfig that = (CommonConfig) o;
if (type != that.type) return false;
if (!properties.equals(that.properties)) return false;
if (!componentBag.equals(that.componentBag)) return false;
if (!enabledFeatureClasses.equals(that.enabledFeatureClasses)) return false;
if (!enabledFeatures.equals(that.enabledFeatures)) return false;
if (!newFeatureRegistrations.equals(that.newFeatureRegistrations)) return false;
return true;
}
@Override
public int hashCode() {
int result = type.hashCode();
result = 31 * result + properties.hashCode();
result = 31 * result + componentBag.hashCode();
result = 31 * result + newFeatureRegistrations.hashCode();
result = 31 * result + enabledFeatures.hashCode();
result = 31 * result + enabledFeatureClasses.hashCode();
return result;
}
}