protected override void LoadChildren() { Database db = m_session.OpenDatabase(m_dbNum, false, false); Page page = m_session.OpenPage(db, m_pageNum); using (System.Windows.Application.Current.Dispatcher.DisableProcessing()) { foreach (IOptimizedPersistable o in page.ObjectsLazyLoaded()) { base.Children.Add(new ObjectViewModel(o, this, m_session)); } } }
static public void SyncWith(this SessionBase sessionToUpdate, SessionBase sessionToRead, Func <SessionBase, UInt64, Change, bool> doUpdate) { UInt64 currentVersion; UInt64 pageToReadVersion; bool conflictFound = false; using (var reader = sessionToRead.BeginRead()) { Changes changes = (Changes)sessionToRead.Open(5, 1, 1, false); if (changes != null) { using (var updater = sessionToUpdate.BeginUpdate()) { var dbs = sessionToUpdate.OpenAllDatabases(); ReplicaSync matchingReplicaSync = null; foreach (ReplicaSync sync in sessionToUpdate.AllObjects <ReplicaSync>()) { if (sync.SyncFromHost == sessionToRead.SystemHostName && sync.SyncFromPath == sessionToRead.SystemDirectory) { matchingReplicaSync = sync; break; } } if (changes.ChangeList.Count > 0) { foreach (TransactionChanges transactionChanges in changes.ChangeList) { if (matchingReplicaSync == null || matchingReplicaSync.TransactionNumber < transactionChanges.TransactionNumber) { foreach (Change change in transactionChanges.ChangeList) { Database dbToUpdate = sessionToUpdate.OpenDatabase(change.DatabaseId, false, false); Database dbToRead = sessionToRead.OpenDatabase(change.DatabaseId, false, false); string dbName = dbToRead != null ? dbToRead.Name : null; if (change.Deleted) { if (dbToUpdate == null) // does not exist { continue; } if (change.PageId == 0) // Database delete { currentVersion = dbToUpdate.Page.PageInfo.VersionNumber; if (currentVersion < change.Version) { sessionToUpdate.DeleteDatabase(dbToUpdate); } else { conflictFound = true; if (doUpdate(sessionToUpdate, currentVersion, change)) { sessionToUpdate.DeleteDatabase(dbToUpdate); } } } else { Page page = sessionToUpdate.OpenPage(dbToUpdate, change.PageId); if (page == null) // page does not exist { continue; } currentVersion = page.PageInfo.VersionNumber; if (currentVersion < change.Version) { sessionToUpdate.DeletePage(dbToUpdate, page); } else { conflictFound = true; if (doUpdate(sessionToUpdate, currentVersion, change)) { sessionToUpdate.DeleteDatabase(dbToUpdate); } } } } else { if (dbToUpdate == null) // does not exist { dbToUpdate = sessionToUpdate.NewDatabase(change.DatabaseId, 0, dbName); } if (change.PageId > 0) { Page pageToUpdate = sessionToUpdate.OpenPage(dbToUpdate, change.PageId); Page pageToRead = sessionToRead.OpenPage(dbToRead, change.PageId); if (pageToRead == null) // upcoming (not yet processed) changes must have deleted this page { continue; } currentVersion = pageToUpdate == null ? 0 : pageToUpdate.PageInfo.VersionNumber; pageToReadVersion = pageToRead.PageInfo.VersionNumber; if (currentVersion < pageToReadVersion || dbToUpdate.IsNew) { sessionToUpdate.ReplacePage(dbToUpdate, pageToUpdate, pageToRead); } else { conflictFound = true; if (doUpdate(sessionToUpdate, currentVersion, change)) { sessionToUpdate.ReplacePage(dbToUpdate, pageToUpdate, pageToRead); } } } } } } } UInt64 lastTransactionNumber = changes.ChangeList.Last().TransactionNumber; if (matchingReplicaSync != null) { matchingReplicaSync.TransactionNumber = lastTransactionNumber; } if (conflictFound) { sessionToUpdate.Verify(); } sessionToUpdate.Commit(); if (matchingReplicaSync == null) { sessionToUpdate.BeginUpdate(); // separate transaction or else gets confused with databases added by sync matchingReplicaSync = new ReplicaSync(sessionToRead, lastTransactionNumber); sessionToUpdate.Persist(matchingReplicaSync); sessionToUpdate.Commit(); } } } } } }
static public void SyncWith(this SessionBase sessionToUpdate, SessionBase sessionToRead, Func<SessionBase, UInt64, Change, bool> doUpdate) { UInt64 currentVersion; UInt64 pageToReadVersion; bool conflictFound = false; using (var reader = sessionToRead.BeginRead()) { Changes changes = (Changes)sessionToRead.Open(5, 1, 1, false); if (changes != null) { using (var updater = sessionToUpdate.BeginUpdate()) { var dbs = sessionToUpdate.OpenAllDatabases(); ReplicaSync matchingReplicaSync = null; foreach (ReplicaSync sync in sessionToUpdate.AllObjects<ReplicaSync>()) { if (sync.SyncFromHost == sessionToRead.SystemHostName && sync.SyncFromPath == sessionToRead.SystemDirectory) { matchingReplicaSync = sync; break; } } if (changes.ChangeList.Count > 0) { foreach (TransactionChanges transactionChanges in changes.ChangeList) { if (matchingReplicaSync == null || matchingReplicaSync.TransactionNumber < transactionChanges.TransactionNumber) { foreach (Change change in transactionChanges.ChangeList) { Database dbToUpdate = sessionToUpdate.OpenDatabase(change.DatabaseId, false, false); Database dbToRead = sessionToRead.OpenDatabase(change.DatabaseId, false, false); string dbName = dbToRead != null ? dbToRead.Name : null; if (change.Deleted) { if (dbToUpdate == null) // does not exist continue; if (change.PageId == 0) // Database delete { currentVersion = dbToUpdate.Page.PageInfo.VersionNumber; if (currentVersion < change.Version) sessionToUpdate.DeleteDatabase(dbToUpdate); else { conflictFound = true; if (doUpdate(sessionToUpdate, currentVersion, change)) sessionToUpdate.DeleteDatabase(dbToUpdate); } } else { Page page = sessionToUpdate.OpenPage(dbToUpdate, change.PageId); if (page == null) // page does not exist continue; currentVersion = page.PageInfo.VersionNumber; if (currentVersion < change.Version) sessionToUpdate.DeletePage(dbToUpdate, page); else { conflictFound = true; if (doUpdate(sessionToUpdate, currentVersion, change)) sessionToUpdate.DeleteDatabase(dbToUpdate); } } } else { if (dbToUpdate == null) // does not exist dbToUpdate = sessionToUpdate.NewDatabase(change.DatabaseId, 0, dbName); if (change.PageId > 0) { Page pageToUpdate = sessionToUpdate.OpenPage(dbToUpdate, change.PageId); Page pageToRead = sessionToRead.OpenPage(dbToRead, change.PageId); if (pageToRead == null) // upcoming (not yet processed) changes must have deleted this page continue; currentVersion = pageToUpdate == null ? 0 : pageToUpdate.PageInfo.VersionNumber; pageToReadVersion = pageToRead.PageInfo.VersionNumber; if (currentVersion < pageToReadVersion || dbToUpdate.IsNew) sessionToUpdate.ReplacePage(dbToUpdate, pageToUpdate, pageToRead); else { conflictFound = true; if (doUpdate(sessionToUpdate, currentVersion, change)) sessionToUpdate.ReplacePage(dbToUpdate, pageToUpdate, pageToRead); } } } } } } UInt64 lastTransactionNumber = changes.ChangeList.Last().TransactionNumber; if (matchingReplicaSync != null) matchingReplicaSync.TransactionNumber = lastTransactionNumber; if (conflictFound) { sessionToUpdate.Verify(); } sessionToUpdate.Commit(); if (matchingReplicaSync == null) { sessionToUpdate.BeginUpdate(); // separate transaction or else gets confused with databases added by sync matchingReplicaSync = new ReplicaSync(sessionToRead, lastTransactionNumber); sessionToUpdate.Persist(matchingReplicaSync); sessionToUpdate.Commit(); } } } } } }