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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
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package org.apache.cayenne.access;
import java.util.Date;
import org.apache.cayenne.DataObject;
import org.apache.cayenne.DataRow;
import org.apache.cayenne.PersistenceState;
import org.apache.cayenne.testdo.testmap.Artist;
import org.apache.cayenne.unit.MultiContextCase;
import org.apache.cayenne.unit.util.ThreadedTestHelper;
public class DataContextDelegateSharedCacheTest extends MultiContextCase {
protected Artist artist;
protected DataContext context;
@Override
protected void setUp() throws Exception {
super.setUp();
context = createDataContextWithSharedCache(true);
// prepare a single artist record
artist = (Artist) context.newObject("Artist");
artist.setArtistName("version1");
artist.setDateOfBirth(new Date());
context.commitChanges();
}
/**
* Test case to prove that delegate method is invoked on external change of object in
* the store.
*
* @throws Exception
*/
public void testShouldMergeChanges() throws Exception {
DataContext altContext = createDataContext();
final boolean[] methodInvoked = new boolean[1];
DataContextDelegate delegate = new MockDataContextDelegate() {
@Override
public boolean shouldMergeChanges(DataObject object, DataRow snapshotInStore) {
methodInvoked[0] = true;
return true;
}
};
// make sure we have a fully resolved copy of an artist object
// in the second context
Artist altArtist = (Artist) altContext.localObject(artist.getObjectId(), null);
assertNotNull(altArtist);
assertNotSame(altArtist, artist);
assertEquals(artist.getArtistName(), altArtist.getArtistName());
assertEquals(PersistenceState.COMMITTED, altArtist.getPersistenceState());
altContext.setDelegate(delegate);
// Update and save artist in peer context
artist.setArtistName("version2");
context.commitChanges();
// assert that delegate was consulted when an object store
// was refreshed
ThreadedTestHelper helper = new ThreadedTestHelper() {
@Override
protected void assertResult() throws Exception {
assertTrue("Delegate was not consulted", methodInvoked[0]);
}
};
helper.assertWithTimeout(3000);
}
/**
* Test case to prove that delegate method can block changes made by ObjectStore.
*
* @throws Exception
*/
public void testBlockedShouldMergeChanges() throws Exception {
String oldName = artist.getArtistName();
DataContext altContext = mirrorDataContext(context);
DataContextDelegate delegate = new MockDataContextDelegate() {
@Override
public boolean shouldMergeChanges(DataObject object, DataRow snapshotInStore) {
return false;
}
};
altContext.setDelegate(delegate);
// make sure we have a fully resolved copy of an artist object
// in the second context
Artist altArtist = (Artist) altContext.getObjectStore().getNode(
artist.getObjectId());
assertNotNull(altArtist);
assertFalse(altArtist == artist);
assertEquals(oldName, altArtist.getArtistName());
assertEquals(PersistenceState.COMMITTED, altArtist.getPersistenceState());
// Update and save artist in peer context
artist.setArtistName("version2");
context.commitChanges();
// assert that delegate was able to block the merge
assertEquals(oldName, altArtist.getArtistName());
}
/**
* Test case to prove that delegate method is invoked on external change of object in
* the store.
*
* @throws Exception
*/
public void testShouldProcessDeleteOnExternalChange() throws Exception {
DataContext altContext = mirrorDataContext(context);
final boolean[] methodInvoked = new boolean[1];
DataContextDelegate delegate = new MockDataContextDelegate() {
@Override
public boolean shouldProcessDelete(DataObject object) {
methodInvoked[0] = true;
return true;
}
};
altContext.setDelegate(delegate);
// make sure we have a fully resolved copy of an artist object
// in the second context
Artist altArtist = (Artist) altContext.getGraphManager().getNode(
artist.getObjectId());
assertNotNull(altArtist);
assertFalse(altArtist == artist);
assertEquals(artist.getArtistName(), altArtist.getArtistName());
assertEquals(PersistenceState.COMMITTED, altArtist.getPersistenceState());
// Update and save artist in peer context
context.deleteObject(artist);
context.commitChanges();
// assert that delegate was consulted when an object store
// was refreshed
ThreadedTestHelper helper = new ThreadedTestHelper() {
@Override
protected void assertResult() throws Exception {
assertTrue("Delegate was not consulted", methodInvoked[0]);
}
};
helper.assertWithTimeout(3000);
}
/**
* Test case to prove that delegate method is invoked on external change of object in
* the store, and is able to block further object processing.
*
* @throws Exception
*/
public void testBlockShouldProcessDeleteOnExternalChange() throws Exception {
DataContext altContext = mirrorDataContext(context);
final boolean[] methodInvoked = new boolean[1];
DataContextDelegate delegate = new MockDataContextDelegate() {
@Override
public boolean shouldProcessDelete(DataObject object) {
methodInvoked[0] = true;
return false;
}
};
altContext.setDelegate(delegate);
// make sure we have a fully resolved copy of an artist object
// in the second context
Artist altArtist = (Artist) altContext.getObjectStore().getNode(
artist.getObjectId());
assertNotNull(altArtist);
assertFalse(altArtist == artist);
assertEquals(artist.getArtistName(), altArtist.getArtistName());
assertEquals(PersistenceState.COMMITTED, altArtist.getPersistenceState());
// Update and save artist in peer context
context.deleteObject(artist);
context.commitChanges();
// assert that delegate was consulted when an object store
// was refreshed, and actually blocked object expulsion
ThreadedTestHelper helper = new ThreadedTestHelper() {
@Override
protected void assertResult() throws Exception {
assertTrue("Delegate was not consulted", methodInvoked[0]);
}
};
helper.assertWithTimeout(3000);
assertEquals(PersistenceState.COMMITTED, altArtist.getPersistenceState());
assertNotNull(altArtist.getObjectContext());
}
}