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package com.sun.enterprise.connectors.util;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.*;
import com.sun.logging.LogDomains;
import java.util.logging.*;
/**
* A simple class to get the properties of a ConnectionDefinition class , that
* could be overridden by the administrator during deployment.
*
* @author Sivakumar Thyagarjan
*/
public class ConnectionDefinitionUtils {
static Logger _logger= LogDomains.getLogger(LogDomains.RSR_LOGGER);
/**
* Gets the properties of the Java bean connection definition class that
* have setter methods defined
*
* @param connectionDefinitionClassName
* The Connection Definition Java bean class for which
* overrideable properties are required.
* @return A Set of properties that have a setter method defined in the
* Connection Definition class
*/
public static Set getConnectionDefinitionProperties(String connectionDefinitionClassName) {
TreeMap propertySet= new TreeMap();
try {
Method[] methods=
Thread.currentThread().getContextClassLoader().loadClass(connectionDefinitionClassName).getMethods();
for (int i= 0; i < methods.length; i++) {
//Method starts with "set" and has only one parameter and has
// a
// valid argument
if (isValidSetterMethod(methods[i])) {
String name= methods[i].getName();
String propertyName=
name.substring(
(name.indexOf("set") + "set".length()),
name.length());
propertySet.put(propertyName, propertyName);
}
}
} catch (SecurityException e) {
handleException(e);
} catch (ClassNotFoundException e) {
handleException(e);
}
ignoreOracle10gProperties(connectionDefinitionClassName, propertySet);
return propertySet.keySet();
}
/**
* Oracle 10g (10.x) jdbc driver has two properties,
* <i>connectionCachingEnabled</i>, <i>fastConnectionFailoverEnabled</i> when set with
* their default values(false) throws exceptions. This workaround (IT 2525) will remove
* these properties during connection pool creation.
* @param className DataSource Classname
* @param map list of properties
*/
private static void ignoreOracle10gProperties(String className, Map map){
Set<String> oracleClasses = new HashSet<String>();
oracleClasses.add("oracle.jdbc.pool.oracledatasource");
oracleClasses.add("oracle.jdbc.pool.oracleconnectionpooldatasource");
oracleClasses.add("oracle.jdbc.xa.client.oraclexadatasource");
oracleClasses.add("oracle.jdbc.xa.oraclexadataSource");
if(oracleClasses.contains(className.toLowerCase())){
boolean property1Removed = removePropertyFromMap("connectionCachingEnabled", map);
boolean property2Removed = removePropertyFromMap("fastConnectionFailoverEnabled",map);
if(property1Removed || property2Removed){
_logger.log(Level.FINE, "Removing properties 'connectionCachingEnabled'," +
" 'fastConnectionFailoverEnabled' from Datasource : " + className );
}
}
}
private static boolean removePropertyFromMap(String property, Map map){
boolean entryRemoved = false ;
Iterator iterator = map.keySet().iterator();
while(iterator.hasNext()){
String key = (String)iterator.next();
if(property.equalsIgnoreCase(key)){
iterator.remove();
entryRemoved = true;
}
}
return entryRemoved;
}
private static boolean isValidSetterMethod(Method method) {
return (
(method.getName().startsWith("set"))
&& (method.getParameterTypes().length == 1)
&& (isValidArgumentType(method)));
}
private static boolean isValidArgumentType(Method method) {
Class[] parameters= method.getParameterTypes();
boolean isValid= true;
for (int i= 0; i < parameters.length; i++) {
Class param= parameters[i];
if (!(param.isPrimitive() || param.equals(String.class)))
return false;
}
return isValid;
}
/**
* Gets the properties of the Java bean connection definition class that
* have setter methods defined and the default values as provided by the
* Connection Definition java bean developer.<br>
* This util method is used to get properties of jdbc-data-source<br>
* To get Connection definition properties for Connector Connection Pool,
* use ConnectorRuntime.getMCFConfigProperties()<br>
* When the connection definition class is not found, standard JDBC
* properties (of JDBC 3.0 Specification) will be returned.<br>
*
* @param connectionDefinitionClassName
* The Connection Definition Java bean class for which
* overrideable properties are required.
* @return Map [property, defaultValue]
*/
public static Map getConnectionDefinitionPropertiesAndDefaults(String connectionDefinitionClassName) {
Set s= getConnectionDefinitionProperties(connectionDefinitionClassName);
TreeMap hm= new TreeMap();
Class connectionDefinitionClass;
try {
connectionDefinitionClass=
Thread.currentThread().getContextClassLoader().loadClass(connectionDefinitionClassName);
Object obj= connectionDefinitionClass.newInstance();
for (Iterator iter= s.iterator(); iter.hasNext();) {
String property= (String) iter.next();
Object defaultVal= null;
try {
Method m=
connectionDefinitionClass.getMethod(
"get" + property,
new Class[] {});
defaultVal= m.invoke(obj, new Object[] {});
//ignore these exceptions. Some drivers have a setter but
// no getters for properties [example the password property
// in the OracleDataSource
} catch (NoSuchMethodException e) {
//ignore
} catch (IllegalArgumentException e) {
//ignore
} catch (InvocationTargetException e) {
//ignore
}
//If the property does not have a corresponding getter method,
// a null is placed as the default value.
hm.put(property, defaultVal);
}
} catch (ClassNotFoundException e) {
handleException(e);
//since the specified connectionDefinitionClassName is not found,
//return the standard JDBC properties
addDefaultJDBCProperties(hm);
} catch (InstantiationException e) {
handleException(e);
} catch (IllegalAccessException e) {
handleException(e);
} catch (SecurityException e) {
handleException(e);
}
return hm;
}
private static void addDefaultJDBCProperties(Map map){
String[] defaultProperties = {
"databaseName", "serverName", "portNumber", "networkProtocol",
"user", "password", "roleName", "datasourceName" };
//assuming that the provided map is not null
for(int i=0; i<defaultProperties.length; i++){
map.put(defaultProperties[i],null);
}
}
private static void handleException(Exception ex) {
ex.printStackTrace();
_logger.log(
Level.SEVERE,
"Exception while trying to find properties ",
ex.getMessage());
}
//test code
public static void main(String[] args) {
//oracle.jdbc.xa.client.OracleXADataSource
//com.pointbase.jdbc.jdbcDataSource
Map m=
ConnectionDefinitionUtils
.getConnectionDefinitionPropertiesAndDefaults(
"sun.jdbc.odbc.ee.DataSource");
for (Iterator iter= m.keySet().iterator(); iter.hasNext();) {
String element= (String) iter.next();
System.out.println(element + " : " + m.get(element));
}
}
}
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