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package com.sun.enterprise.server.pluggable;
import com.sun.enterprise.pluggable.PluggableFeatureFactoryBaseImpl;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.sun.logging.LogDomains;
/**
* An implementation of PluggableFeatureFactory interface using dynamic
* proxies. This class does not directly implement the interface
* PluggableFeatureFactory, but an proxy instance implementing the interface
* can be obtained by a call to the static method getInstance(). In reality,
* this class implements InvocationHnalder interface used to handle method
* invocations on a dynamic proxy object.
*/
public class PluggableFeatureFactoryImpl extends PluggableFeatureFactoryBaseImpl {
/**
* Name of the property class containing feature name and feature
* implementation class names.
*/
private static final String DEFAULT_FEATURES_PROPERTY_CLASS =
"com.sun.enterprise.server.pluggable.PEPluggableFeatureImpl";
private static Logger _logger = LogDomains.getLogger(LogDomains.CORE_LOGGER);
/**
* Private constructor. The public instances of this object are not
* available. The instance of this class is however used as invocation
* handler for dynamic proxy returned by static method getInstance().
*/
public PluggableFeatureFactoryImpl(Logger logger) {
super(logger);
}
public static PluggableFeatureFactory getFactory() {
String featurePropClass = System.getProperty(
PluggableFeatureFactory.PLUGGABLE_FEATURES_PROPERTY_NAME,
DEFAULT_FEATURES_PROPERTY_CLASS);
_logger.log(Level.FINER, "featurePropClass: " + featurePropClass);
PluggableFeatureFactoryImpl featureFactoryImpl =
new PluggableFeatureFactoryImpl(_logger);
PluggableFeatureFactory featureFactory = (PluggableFeatureFactory)
featureFactoryImpl.getInstance(featurePropClass);
if (featureFactory == null) {
_logger.log(Level.WARNING,
"j2eerunner.pluggable_feature_noinit", featurePropClass);
}
return featureFactory;
}
protected String getDefaultFeatureFactoryPropertyName() {
return System.getProperty(
PluggableFeatureFactory.PLUGGABLE_FEATURES_PROPERTY_NAME);
}
protected Object createFeatureFactory(InvocationHandler handler) {
return Proxy.newProxyInstance(
PluggableFeatureFactory.class.getClassLoader(),
new Class[] { PluggableFeatureFactory.class },
handler);
}
}
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