public ThreadLocalCachingConnectionInterceptor(ConnectionInterceptor next,
    boolean matchConnections) 
{
        this.next = next;
        this.matchConnections = matchConnections;
}

 public  void getConnection(ConnectionInfo connectionInfo) throws ResourceException 
{
        if (connectionInfo.isUnshareable()) {
            next.getConnection(connectionInfo);
            return;
        }
        ManagedConnectionInfo managedConnectionInfo = (ManagedConnectionInfo) connections.get();
        if (managedConnectionInfo != null) {
            if (matchConnections) {
                ManagedConnectionInfo mciRequest = connectionInfo.getManagedConnectionInfo();
                if (null != managedConnectionInfo.getManagedConnectionFactory().matchManagedConnections(
                        Collections.singleton(managedConnectionInfo.getManagedConnection()),
                        mciRequest.getSubject(),
                        mciRequest.getConnectionRequestInfo()
                )) {
                    connectionInfo.setManagedConnectionInfo(managedConnectionInfo);
                    return;
                } else {
                    //match failed, get a new cx after returning this one
                    connections.set(null);
                    next.returnConnection(connectionInfo, ConnectionReturnAction.RETURN_HANDLE);
                }
            } else {
                connectionInfo.setManagedConnectionInfo(managedConnectionInfo);
                return;
            }
        }
        //nothing for this thread or match failed
        next.getConnection(connectionInfo);
        connections.set(connectionInfo.getManagedConnectionInfo());
}

 public  void returnConnection(ConnectionInfo connectionInfo,
    ConnectionReturnAction connectionReturnAction) 
{
        if (connectionReturnAction == ConnectionReturnAction.DESTROY || connectionInfo.isUnshareable()) {
            next.returnConnection(connectionInfo, connectionReturnAction);
        }
}