public void merge(Revision base, Revision fork) {
if (base != fork || base != head.get()) {
while (!head.compareAndSet(base, fork)) {
Revision h = head.get();
fork = base.merge(h, fork, conflictResolver, foreignKeyResolver);
base = h;
}
for (Runnable listener : listeners.get()) {
listener.run();
}
}
}
@Test
public void test() {
RevisionServer rawServer =
new SimpleRevisionServer(ConflictResolvers.Restrict, ForeignKeyResolvers.Restrict);
MyTaskHandler handler = new MyTaskHandler();
RevisionServer asyncServer =
Servers.asynchronousRevisionServer(
rawServer, ConflictResolvers.Restrict, ForeignKeyResolvers.Restrict, handler);
Column<Integer> number = new Column<Integer>(Integer.class);
Column<String> name = new Column<String>(String.class);
Table numbers = new Table(cols(number));
Revision base = rawServer.head();
rawServer.merge(base, base.builder().table(numbers).row(11).update(name, "once").commit());
assertEquals("once", rawServer.head().query(name, numbers.primaryKey, 11));
assertEquals(null, asyncServer.head().query(name, numbers.primaryKey, 11));
handler.flush();
assertEquals("once", rawServer.head().query(name, numbers.primaryKey, 11));
assertEquals("once", asyncServer.head().query(name, numbers.primaryKey, 11));
base = asyncServer.head();
asyncServer.merge(base, base.builder().table(numbers).row(12).update(name, "twelve").commit());
base = asyncServer.head();
asyncServer.merge(base, base.builder().table(numbers).row(12).update(name, "doce").commit());
base = rawServer.head();
rawServer.merge(base, base.builder().table(numbers).row(10).update(name, "diez").commit());
assertEquals("diez", rawServer.head().query(name, numbers.primaryKey, 10));
assertEquals(null, asyncServer.head().query(name, numbers.primaryKey, 10));
assertEquals("once", rawServer.head().query(name, numbers.primaryKey, 11));
assertEquals("once", asyncServer.head().query(name, numbers.primaryKey, 11));
assertEquals("doce", rawServer.head().query(name, numbers.primaryKey, 12));
assertEquals("doce", asyncServer.head().query(name, numbers.primaryKey, 12));
handler.flush();
assertEquals("diez", rawServer.head().query(name, numbers.primaryKey, 10));
assertEquals("diez", asyncServer.head().query(name, numbers.primaryKey, 10));
assertEquals("once", rawServer.head().query(name, numbers.primaryKey, 11));
assertEquals("once", asyncServer.head().query(name, numbers.primaryKey, 11));
assertEquals("doce", rawServer.head().query(name, numbers.primaryKey, 12));
assertEquals("doce", asyncServer.head().query(name, numbers.primaryKey, 12));
}
