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Seam core module for Seam framework integrated with JSF2

There is a newer version: 3.2.26.ayg

package org.jboss.seam.transaction;

import static org.jboss.seam.annotations.Install.BUILT_IN;

import javax.naming.InitialContext;
import javax.naming.NameNotFoundException;
import javax.naming.NamingException;

import org.jboss.seam.Component;
import org.jboss.seam.ScopeType;
import org.jboss.seam.annotations.Install;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Scope;
import org.jboss.seam.annotations.Unwrap;
import org.jboss.seam.annotations.intercept.BypassInterceptors;
import org.jboss.seam.util.EJB;
import org.jboss.seam.util.Naming;

/**
 * Supports injection of a Seam UserTransaction object that
 * wraps the current JTA transaction or EJB container managed
 * transaction.
 * 
 * @author Mike Youngstrom
 * @author Gavin King
 * 
 */
@Name("org.jboss.seam.transaction.transaction")
@Scope(ScopeType.EVENT)
@Install(precedence = BUILT_IN)
@BypassInterceptors
public class Transaction {
	// Event keys
	public static final String TRANSACTION_FAILED = "org.jboss.seam.transaction.transactionFailed";

	public Transaction() {
		super();
	}
	
	public static UserTransaction instance() {
		return (UserTransaction) Component.getInstance(Transaction.class, ScopeType.EVENT);
	}

	@Unwrap
	public UserTransaction getTransaction() throws NamingException {
		try {
			return createUTTransaction();
		} catch (NameNotFoundException nnfe) {
			try {
				return createCMTTransaction();
			} catch (NameNotFoundException nnfe2) {
				return createNoTransaction();
			}
		}
	}

	protected UserTransaction createNoTransaction() {
		return new NoTransaction();
	}

	protected UserTransaction createCMTTransaction() throws NamingException {
		return new CMTTransaction(EJB.getEJBContext());
	}

	protected UserTransaction createUTTransaction() throws NamingException {
		return new UTTransaction(getUserTransaction());
	}

	protected javax.transaction.UserTransaction getUserTransaction() throws NamingException {
		InitialContext context = Naming.getInitialContext();
		try {
			return (javax.transaction.UserTransaction) context.lookup("java:comp/UserTransaction");
		} catch (NamingException ne) {
			try {
				//Embedded JBoss has no java:comp/UserTransaction
				javax.transaction.UserTransaction ut = (javax.transaction.UserTransaction) context.lookup("UserTransaction");
				ut.getStatus(); //for glassfish, which can return an unusable UT
				return ut;
			} catch (NamingException nnfe2) {
				// Try the other JBoss location in JBoss AS7
				return (javax.transaction.UserTransaction) context.lookup("java:jboss/UserTransaction");
			} catch (Exception e) {
				throw ne;
			}
		}
	}

}