public void TestDBObserver()
{
RunTestVariants(() =>
{
var handle = GCHandle.Alloc(this);
try
{
_dbObserver = Native.c4dbobs_create(Db, DatabaseCallback, GCHandle.ToIntPtr(handle).ToPointer());
CreateRev("A", FLSlice.Constant("1-aa"), FleeceBody);
_dbCallbackCalls.Should().Be(1, "because we should have received a callback");
CreateRev("B", FLSlice.Constant("1-bb"), FleeceBody);
_dbCallbackCalls.Should().Be(1, "because we should have received a callback");
CheckChanges(new[] { "A", "B" }, new[] { "1-aa", "1-bb" });
CreateRev("B", FLSlice.Constant("2-bbbb"), FleeceBody);
_dbCallbackCalls.Should().Be(2, "because we should have received a callback");
CreateRev("C", FLSlice.Constant("1-cc"), FleeceBody);
_dbCallbackCalls.Should().Be(2, "because we should have received a callback");
CheckChanges(new[] { "B", "C" }, new[] { "2-bbbb", "1-cc" });
Native.c4dbobs_free(_dbObserver);
_dbObserver = null;
CreateRev("A", FLSlice.Constant("2-aaaa"), FleeceBody);
_dbCallbackCalls.Should().Be(2, "because the observer was disposed");
}
finally
{
handle.Free();
}
});
}
private void Observe(C4DatabaseObserver *observer)
{
Write("!");
lock (_observerMutex) {
_changesToObserve = true;
}
}
private static void DbObserverCallback(C4DatabaseObserver *db, object context)
{
var dbObj = (Database)context;
dbObj?._callbackFactory.StartNew(() => {
dbObj.PostDatabaseChanged();
});
}
private static void DbObserverCallback(C4DatabaseObserver *observer, void *context)
{
var idHolder = GCHandle.FromIntPtr((IntPtr)context);
var id = (Guid)idHolder.Target;
var obj = _ObserverMap[id];
obj._callback?.Invoke(observer, obj._context);
}
protected override void TeardownVariant(int option)
{
Native.c4dbobs_free(_dbObserver);
_dbObserver = null;
Native.c4docobs_free(_docObserver);
_docObserver = null;
base.TeardownVariant(option);
}
public void TestMultiDbObserver()
{
RunTestVariants(() =>
{
var handle = GCHandle.Alloc(this);
try
{
_dbObserver = Native.c4dbobs_create(Db, DatabaseCallback, GCHandle.ToIntPtr(handle).ToPointer());
CreateRev("A", FLSlice.Constant("1-aa"), FleeceBody);
_dbCallbackCalls.Should().Be(1, "because we should have received a callback");
CreateRev("B", FLSlice.Constant("1-bb"), FleeceBody);
_dbCallbackCalls.Should().Be(1, "because we should have received a callback");
CheckChanges(new[] { "A", "B" }, new[] { "1-aa", "1-bb" });
// Open another database on the same file
var otherdb = (C4Database *)LiteCoreBridge.Check(err =>
Native.c4db_open(DatabasePath(), Native.c4db_getConfig(Db), err));
LiteCoreBridge.Check(err => Native.c4db_beginTransaction(otherdb, err));
try {
CreateRev(otherdb, "C", FLSlice.Constant("1-cc"), FleeceBody);
CreateRev(otherdb, "D", FLSlice.Constant("1-dd"), FleeceBody);
CreateRev(otherdb, "E", FLSlice.Constant("1-ee"), FleeceBody);
} finally {
LiteCoreBridge.Check(err => Native.c4db_endTransaction(otherdb, true, err));
}
_dbCallbackCalls.Should().Be(2, "because the observer should cover all connections");
CheckChanges(new[] { "C", "D", "E" }, new[] { "1-cc", "1-dd", "1-ee" }, true);
Native.c4dbobs_free(_dbObserver);
_dbObserver = null;
CreateRev("A", FLSlice.Constant("2-aaaa"), FleeceBody);
_dbCallbackCalls.Should().Be(2, "because the observer was disposed");
LiteCoreBridge.Check(err => Native.c4db_close(otherdb, err));
Native.c4db_release(otherdb);
}
finally
{
handle.Free();
}
});
}
private static void ObsCallback(C4DatabaseObserver *observer, object context)
{
((ThreadingTest)context).Observe(observer);
}
public static extern uint c4dbobs_getChanges(C4DatabaseObserver *observer, [Out] C4DatabaseChange[] outChanges, uint maxChanges, bool *outExternal);
public static extern void c4dbobs_free(C4DatabaseObserver *observer);
private static void ObsCallback(C4DatabaseObserver *observer, void *context)
{
var obj = GCHandle.FromIntPtr((IntPtr)context).Target as ThreadingTest;
obj.Observe(observer);
}
private void DbObserverCalled(C4DatabaseObserver *obs)
{
((long)obs).Should().Be((long)_dbObserver, "because the callback should be for the proper DB");
_dbCallbackCalls++;
}
private static void DBObserverCallback(C4DatabaseObserver *obs, void *context)
{
var obj = GCHandle.FromIntPtr((IntPtr)context).Target as ObserverTest;
obj.DbObserverCalled(obs);
}
public void c4dbobs_free(C4DatabaseObserver *observer) => Native.c4dbobs_free(observer);
public uint c4dbobs_getChanges(C4DatabaseObserver *observer, C4DatabaseChange[] outChanges, uint maxChanges, bool *outExternal) => Native.c4dbobs_getChanges(observer, outChanges, maxChanges, outExternal);
public static void c4dbobs_free(C4DatabaseObserver *observer) => Impl.c4dbobs_free(observer);
private static void DBObserverCallback(C4DatabaseObserver *obs, object context)
{
((ObserverTest)context).DbObserverCalled(obs);
}