package com.atlassian.activeobjects.internal;
   
   import com.atlassian.sal.api.transaction.TransactionCallback;
   import org.slf4j.Logger;
   import org.slf4j.LoggerFactory;
   
   /**
    * An abstract implementation that log at debug level runtime exception that cross the boundary
    * of a transaction.
   */
  abstract class AbstractLoggingTransactionManager implements TransactionManager {
      protected final Logger logger = LoggerFactory.getLogger(this.getClass());
  
      public final <T> T doInTransaction(TransactionCallback<T> callback) {
          try {
              return inTransaction(callback);
          } catch (RuntimeException e) {
              logger.debug("Exception thrown within transaction", e);
              throw e;
          }
      }
  
      abstract <T> T inTransaction(TransactionCallback<T> callback);
  }