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  package org.apache.cayenne.access;
  
  import org.apache.cayenne.DataChannel;
  import org.apache.cayenne.DataChannelListener;
  import org.apache.cayenne.ObjectContext;
  import org.apache.cayenne.access.util.RuntimeCaseSyncModule;
  import org.apache.cayenne.di.Inject;
  import org.apache.cayenne.graph.GraphEvent;
  import org.apache.cayenne.runtime.CayenneRuntime;
  import org.apache.cayenne.test.parallel.ParallelTestContainer;
  import org.apache.cayenne.testdo.testmap.Artist;
  import org.apache.cayenne.unit.di.runtime.CayenneProjects;
  import org.apache.cayenne.unit.di.runtime.ExtraModules;
  import org.apache.cayenne.unit.di.runtime.RuntimeCase;
  import org.apache.cayenne.unit.di.runtime.UseCayenneRuntime;
  import org.apache.cayenne.util.EventUtil;
  import org.junit.Test;
  
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  
  /**
   * Tests that DataContext sends DataChannel events.
   */
  @UseCayenneRuntime(CayenneProjects.TESTMAP_PROJECT)
  @ExtraModules(RuntimeCaseSyncModule.class)
  public class DataContextDataChannelEventsIT extends RuntimeCase {
  
      @Inject
      private DataContext context;
  
      @Inject
      private DataContext peer;
  
      @Inject
      private CayenneRuntime runtime;
  
      @Test
      public void testCommitEvent() throws Exception {
          Artist a = context.newObject(Artist.class);
          a.setArtistName("X");
          context.commitChanges();
  
          final MockChannelListener listener = new MockChannelListener();
          EventUtil.listenForChannelEvents(context, listener);
  
          a.setArtistName("Y");
          context.commitChanges();
  
          new ParallelTestContainer() {
  
              @Override
              protected void assertResult() throws Exception {
                  assertTrue(listener.graphCommitted);
                  assertFalse(listener.graphChanged);
                  assertFalse(listener.graphRolledBack);
              }
          }.runTest(10000);
  
      }
  
      @Test
      public void testRollbackEvent() throws Exception {
          Artist a = context.newObject(Artist.class);
          a.setArtistName("X");
          context.commitChanges();
  
          final MockChannelListener listener = new MockChannelListener();
          EventUtil.listenForChannelEvents(context, listener);
  
          a.setArtistName("Y");
          context.rollbackChanges();
  
          new ParallelTestContainer() {
  
              @Override
              protected void assertResult() throws Exception {
                  assertFalse(listener.graphCommitted);
                  assertFalse(listener.graphChanged);
                  assertTrue(listener.graphRolledBack);
              }
          }.runTest(10000);
      }
  
      @Test
      public void testChangeEventOnChildChange() throws Exception {
          Artist a = context.newObject(Artist.class);
          a.setArtistName("X");
          context.commitChanges();
  
          final MockChannelListener listener = new MockChannelListener();
          EventUtil.listenForChannelEvents(context, listener);
  
          ObjectContext childContext = runtime.newContext(context);
  
          Artist a1 = childContext.localObject(a);
  
          a1.setArtistName("Y");
          childContext.commitChangesToParent();
  
          new ParallelTestContainer() {
  
              @Override
              protected void assertResult() throws Exception {
                  assertFalse(listener.graphCommitted);
                  assertTrue(listener.graphChanged);
                  assertFalse(listener.graphRolledBack);
              }
          }.runTest(10000);
      }
  
      @Test
      public void testChangeEventOnPeerChange() throws Exception {
          Artist a = context.newObject(Artist.class);
          a.setArtistName("X");
          context.commitChanges();
  
          final MockChannelListener listener = new MockChannelListener();
          EventUtil.listenForChannelEvents(context, listener);
  
          Artist a1 = peer.localObject(a);
  
          a1.setArtistName("Y");
          peer.commitChangesToParent();
  
          new ParallelTestContainer() {
  
              @Override
              protected void assertResult() throws Exception {
                  assertFalse(listener.graphCommitted);
                  assertTrue(listener.graphChanged);
                  assertFalse(listener.graphRolledBack);
              }
          }.runTest(10000);
      }
  
      @Test
      public void testChangeEventOnPeerChangeSecondNestingLevel() throws Exception {
          ObjectContext childPeer1 = runtime.newContext(context);
  
          Artist a = childPeer1.newObject(Artist.class);
          a.setArtistName("X");
          childPeer1.commitChanges();
  
          final MockChannelListener listener = new MockChannelListener();
          EventUtil.listenForChannelEvents((DataChannel) childPeer1, listener);
  
          ObjectContext childPeer2 = runtime.newContext(context);
  
          Artist a1 = childPeer2.localObject(a);
  
          a1.setArtistName("Y");
          childPeer2.commitChangesToParent();
  
          new ParallelTestContainer() {
  
              @Override
              protected void assertResult() throws Exception {
                  assertFalse(listener.graphCommitted);
                  assertTrue(listener.graphChanged);
                  assertFalse(listener.graphRolledBack);
              }
          }.runTest(10000);
      }
  
      class MockChannelListener implements DataChannelListener {
  
          boolean graphChanged;
          boolean graphCommitted;
          boolean graphRolledBack;
  
          public void graphChanged(GraphEvent event) {
              graphChanged = true;
          }
  
          public void graphFlushed(GraphEvent event) {
              graphCommitted = true;
          }
  
          public void graphRolledback(GraphEvent event) {
              graphRolledBack = true;
          }
      }
  }
  