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/*
* EnvironmentFactory.java
*
* Created on January 9, 2004, 11:42 AM
*/
package com.sun.enterprise.config.pluggable;
import com.sun.enterprise.config.ConfigRuntimeException;
import com.sun.enterprise.config.impl.ConfigEnvironmentImpl;
import com.sun.enterprise.config.impl.DefaultConfigBeanInterceptor;
import com.sun.enterprise.config.util.LocalStringsHelper;
import com.sun.enterprise.config.util.LoggerHelper;
/**
* provides a implementation of factory. Users can
* extend this class and implement required methods and set their
* class in environment variable ENVIRONMENT_FACTORY_CLASS. The
* statis create method in this class reads the variable and
* instantiates the class. Note that the implemented factory
* needs a no arg constructor
* @author sridatta
*/
public class EnvironmentFactory {
static final String ENVIRONMENT_FACTORY_CLASS =
"com.sun.enterprise.config.config_environment_factory_class";
private static EnvironmentFactory _ENV = null;
/** Creates a new instance of EnvironmentFactory */
public EnvironmentFactory() {
}
public static synchronized EnvironmentFactory getEnvironmentFactory() {
if(_ENV == null) {
_ENV = createEnvironmentFactory();
}
return _ENV;
}
private static EnvironmentFactory createEnvironmentFactory() {
String factoryClassName = System.getProperty(ENVIRONMENT_FACTORY_CLASS);
Class factoryClass;
try {
if(factoryClassName!= null && !"".equals(factoryClassName)) {
factoryClass = Class.forName(factoryClassName);
} else {
factoryClass = EnvironmentFactory.class;
}
}catch(Exception e) {
throw new ConfigRuntimeException(
"error_loading_environment_factory_class",
LocalStringsHelper.
getString("error_loading_environment_factory_class"),
e);
}
LoggerHelper.fine(
"com.sun.enterprise.config.pluggable.EnvironmentFactory.getEnvironmentFactory():" +
"Factory Class is " + factoryClass);
EnvironmentFactory result = null;
try {
result = (EnvironmentFactory) factoryClass.newInstance();
} catch(Exception e) {
throw new ConfigRuntimeException(
"error_creating_environment_factory",
LocalStringsHelper.
getString("error_creating_environment_factory"),
e);
}
return result;
}
/**
* creates a new configEnvironmentImpl with
* defaults
*/
public ConfigEnvironment getConfigEnvironment() {
ConfigEnvironment ce = new ConfigEnvironmentImpl();
ce.setConfigBeanInterceptor(new DefaultConfigBeanInterceptor());
return ce;
}
}