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  package org.apache.cayenne.tx;
  
  import org.apache.cayenne.ObjectContext;
  import org.apache.cayenne.di.Inject;
  import org.apache.cayenne.log.JdbcEventLogger;
  import org.apache.cayenne.testdo.testmap.Artist;
  import org.apache.cayenne.unit.di.runtime.CayenneProjects;
  import org.apache.cayenne.unit.di.runtime.RuntimeCase;
  import org.apache.cayenne.unit.di.runtime.UseCayenneRuntime;
  import org.junit.Test;
  
  import javax.sql.DataSource;
  import java.sql.Connection;
  import java.sql.SQLException;
  import java.util.Map;
  
  import static org.junit.Assert.assertEquals;
  
  @UseCayenneRuntime(CayenneProjects.TESTMAP_PROJECT)
  public class UserTransactionIT extends RuntimeCase {
  
      @Inject
      private ObjectContext context;
  
      @Inject
      private JdbcEventLogger logger;
  
      @Test
      public void testCommit() throws Exception {
  
          Artist a = context.newObject(Artist.class);
          a.setArtistName("AAA");
  
          TxWrapper t = new TxWrapper(new CayenneTransaction(logger));
          BaseTransaction.bindThreadTransaction(t);
  
          try {
              context.commitChanges();
          } finally {
              t.rollback();
              BaseTransaction.bindThreadTransaction(null);
          }
  
          assertEquals(0, t.commitCount);
          assertEquals(1, t.getConnections().size());
      }
  
      class TxWrapper implements Transaction {
  
          int commitCount;
          private Transaction delegate;
  
          TxWrapper(Transaction delegate) {
              this.delegate = delegate;
          }
  
          public void begin() {
              delegate.begin();
          }
  
          public void commit() {
              commitCount++;
              delegate.commit();
          }
  
          public void rollback() {
              delegate.rollback();
          }
  
          public void setRollbackOnly() {
              delegate.setRollbackOnly();
          }
  
          public boolean isRollbackOnly() {
              return delegate.isRollbackOnly();
          }
  
          @Override
          public Connection getOrCreateConnection(String connectionName, DataSource dataSource) throws SQLException {
              return delegate.getOrCreateConnection(connectionName, dataSource);
          }
  
          @Override
          public Map<String, Connection> getConnections() {
              return delegate.getConnections();
          }
  
          @Override
          public void addListener(TransactionListener listener) {
              delegate.addListener(listener);
          }
  
          @Override
          public boolean isExternal() {
              return false;
          }
      }
  
  }
  