com.sun.enterprise.resource.pool.ResourceGateway Maven / Gradle / Ivy
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package com.sun.enterprise.resource.pool;
import com.sun.logging.LogDomains;
import com.sun.appserv.connectors.internal.api.PoolingException;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Resource gateway used to restrict the resource access. eg: based on priority.
*
* @author Jagadish Ramu
*/
public class ResourceGateway {
protected final static Logger _logger = LogDomains.getLogger(ResourceGateway.class, LogDomains.RSR_LOGGER);
/**
* indicates whether resource access is allowed or not.
*
* @return boolean
*/
public boolean allowed() {
return true;
}
/**
* used to indicate the gateway that a resource is acquired.
*/
public void acquiredResource() {
// no-op
}
public static ResourceGateway getInstance(String className) throws PoolingException {
ResourceGateway gateway = null;
if (className != null) {
gateway = initializeCustomResourceGatewayInPrivilegedMode(className);
} else {
gateway = new ResourceGateway();
}
return gateway;
}
private static ResourceGateway initializeCustomResourceGatewayInPrivilegedMode(final String className)
throws PoolingException {
Object result = AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
Object result = null;
try {
result = initializeCustomResourceGateway(className);
} catch (Exception e) {
_logger.log(Level.WARNING, "pool.resource.gateway.init.failure", className);
_logger.log(Level.WARNING, "pool.resource.gateway.init.failure", e);
}
return result;
}
});
if (result != null) {
return (ResourceGateway) result;
} else {
throw new PoolingException("Unable to initalize custom ResourceGateway : " + className);
}
}
private static ResourceGateway initializeCustomResourceGateway(String className) throws Exception {
ResourceGateway gateway;
Class class1 = Class.forName(className);
gateway = (ResourceGateway) class1.newInstance();
return gateway;
}
protected static void debug(String debugStatement) {
if (_logger.isLoggable(Level.FINE))
_logger.log(Level.FINE, debugStatement);
}
}