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package com.sun.ejb.base.sfsb.initialization;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.sun.logging.LogDomains;
import com.sun.appserv.ha.util.*;
import com.sun.ejb.base.sfsb.store.FileTxStoreManager;
import com.sun.ejb.spi.sfsb.store.SFSBTxStoreManager;
/**
* Factory for creating SFSBTxStoreManager. SFSBTxStoreManager is
* responsible for checkpointing an Array of SFSBBeanState(s)
* (as a single transactional unit if possible)
*
* @author Mahesh Kannan
*/
public class SFSBTxStoreManagerFactory {
private static final Logger _logger =
LogDomains.getLogger(LogDomains.EJB_LOGGER);
protected static final String DEFAULT_EE_PACKAGE =
"com.sun.ejb.ee.sfsb.store";
public static SFSBTxStoreManager createSFSBTxStoreManager(
String persistenceType)
{
if ("file".equalsIgnoreCase(persistenceType)) {
return new FileTxStoreManager();
}
String resolvedPersistenceType
= getResolvedPersistenceType(persistenceType);
Exception exception = null;
try {
String className = createClassNameFrom(resolvedPersistenceType);
return (SFSBTxStoreManager)
(Class.forName(className)).newInstance();
} catch (ClassNotFoundException cnfEx) {
exception = cnfEx;
_logger.log(Level.FINE,
"Exception while creating SFSBTxStoreManager for persistence "
+ "type: " + persistenceType + ". Exception: " + cnfEx);
} catch (Exception ex) {
exception = ex;
_logger.log(Level.FINE,
"Exception while creating SFSBTxStoreManager for "
+ "persistence type: " + persistenceType, ex);
}
if (_logger.isLoggable(Level.WARNING)) {
_logger.log(Level.WARNING, "Created FileTxStoreManager for persistence"
+ " type: " + persistenceType, exception);
}
return new FileTxStoreManager();
}
/**
*
* @param persistenceType
*/
private static String createClassNameFrom(String persistenceType) {
StringBuffer sbuf = new StringBuffer();
sbuf.append(getEEPackage()).append(".")
.append(camelCase(persistenceType))
.append("TxStoreManager");
String classname = sbuf.toString();
return classname;
}
/**
* this method strips out all non-alpha characters; camelCases the result
*
* @param inputString
*/
private static String camelCase(String inputString) {
String strippedString = stripNonAlphas(inputString);
String firstLetter = (strippedString.substring(0, 1)).toUpperCase();
String remainingPart =
(strippedString.substring(1, strippedString.length())).toLowerCase();
return firstLetter + remainingPart;
}
/**
* this method strips out all non-alpha characters
*
* @param inputString
*/
private static String stripNonAlphas(String inputString) {
StringBuffer sb = new StringBuffer(50);
for(int i=0; i<inputString.length(); i++) {
char nextChar = inputString.charAt(i);
if(Character.isLetter(nextChar)) {
sb.append(nextChar);
}
}
return sb.toString();
}
/**
* return the path where the ee builders reside
* although this method allows this to be configurable
* via an property in server.xml we do not expose it
* and it should not be re-configured
*
*/
private static String getEEPackage() {
return DEFAULT_EE_PACKAGE;
}
private static String getResolvedPersistenceType(String persistenceType) {
String resolverClassName
= "com.sun.enterprise.ee.web.sessmgmt.EEPersistenceTypeResolver";
String resolvedPersistenceType = persistenceType;
PersistenceTypeResolver persistenceTypeResolver = null;
try {
persistenceTypeResolver =
(PersistenceTypeResolver) (Class.forName(resolverClassName)).newInstance();
if(persistenceTypeResolver != null) {
resolvedPersistenceType
= persistenceTypeResolver.resolvePersistenceType(persistenceType);
//this is because file not memory is the correct 'default'
if("memory".equalsIgnoreCase(resolvedPersistenceType)) {
resolvedPersistenceType = "file";
} else if("replicated".equalsIgnoreCase(resolvedPersistenceType)) {
//this is because replicated can make use of the same
//HaTxStoreManager that ha uses
resolvedPersistenceType = "ha";
}
}
} catch (Exception ex) {
_logger.log(Level.WARNING, "unable to create persistence type resolver");
}
return resolvedPersistenceType;
}
}
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