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package com.sun.ejb.base.sfsb.store;

import java.util.logging.Logger;
import java.util.logging.Level;
import com.sun.logging.LogDomains;

import com.sun.ejb.spi.sfsb.store.SFSBTxStoreManager;
import com.sun.ejb.spi.sfsb.store.SFSBStoreManager;
import com.sun.ejb.spi.sfsb.store.SFSBBeanState;
import com.sun.ejb.spi.sfsb.store.SFSBStoreManagerException;


/**
 * A SFSBTxStoreManager that <b>CANNOT</b> save multiple SFSBBeanStates
 *  as a single transactional unit (Example file system).
 *
 * This implementation simply stores each BeanState separately by
 *  calling the appropriate StoreManager's checkpointSave method
 *
 * @author Mahesh Kannan
 */
public class FileTxStoreManager
    implements SFSBTxStoreManager
{

    private static final Level TRACE_LEVEL = Level.FINE;

    protected static final Logger _logger =
        LogDomains.getLogger(LogDomains.EJB_LOGGER);

    public FileTxStoreManager() {
    }

    public void checkpointSave(SFSBBeanState[] beanStates)
        throws SFSBStoreManagerException
    {
	int sz = beanStates.length;
	for (int i=0; i<sz; i++) {
	    SFSBStoreManager manager = beanStates[i].getSFSBStoreManager();
	    try {
		if (manager == null) {
		    _logger.log(Level.WARNING,
			"StoreManager is null. Cannot checkpoint");
		} else {
		    manager.checkpointSave(beanStates[i]);
		    if (_logger.isLoggable(TRACE_LEVEL)) {
			_logger.log(TRACE_LEVEL, "Successfully txCheckpointed "
			    + beanStates.length + " beans...");
		    }
		}
	    } catch (SFSBStoreManagerException smEx) {
		_logger.log(Level.WARNING,
			"StoreManagerException during checkpointSave", smEx);
	    } catch (Throwable th) {
		_logger.log(Level.WARNING,
			"Exception during checkpointSave", th);
	    }
	}
    }

}