| /** |
| * Copyright (c) 2004 - 2011 Eike Stepper (Berlin, Germany) and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Eike Stepper - initial API and implementation |
| */ |
| package org.eclipse.emf.cdo.internal.server.syncing; |
| |
| import org.eclipse.emf.cdo.spi.server.InternalCommitContext; |
| import org.eclipse.emf.cdo.spi.server.InternalFailoverParticipant; |
| import org.eclipse.emf.cdo.spi.server.InternalTransaction; |
| |
| /** |
| * @author Eike Stepper |
| */ |
| public class FailoverParticipant extends SynchronizableRepository implements InternalFailoverParticipant |
| { |
| private boolean allowBackupCommits; |
| |
| public FailoverParticipant() |
| { |
| setState(OFFLINE); |
| } |
| |
| public boolean isAllowBackupCommits() |
| { |
| return allowBackupCommits; |
| } |
| |
| public void setAllowBackupCommits(boolean allowBackupCommits) |
| { |
| this.allowBackupCommits = allowBackupCommits; |
| } |
| |
| @Override |
| public void setType(Type type) |
| { |
| checkArg(type == MASTER || type == BACKUP, "Type must be MASTER or BACKUP"); |
| super.setType(type); |
| } |
| |
| @Override |
| protected void changingType(Type oldType, Type newType) |
| { |
| if (isActive()) |
| { |
| if (newType == MASTER) |
| { |
| // Switch off synchronizer |
| doStopSynchronization(); |
| } |
| else |
| { |
| // Bug 312879 |
| setReplicationCountersToLatest(); |
| |
| // Switch on synchronizer |
| doStartSynchronization(); |
| } |
| } |
| |
| super.changingType(oldType, newType); |
| } |
| |
| @Override |
| protected void initRootResource() |
| { |
| if (getType() == BACKUP) |
| { |
| super.initRootResource(); |
| } |
| else |
| { |
| doInitRootResource(); |
| } |
| } |
| |
| protected void doStartSynchronization() |
| { |
| super.startSynchronization(); |
| } |
| |
| protected void doStopSynchronization() |
| { |
| super.stopSynchronization(); |
| } |
| |
| @Override |
| protected void startSynchronization() |
| { |
| if (getType() == BACKUP) |
| { |
| doStartSynchronization(); |
| } |
| } |
| |
| @Override |
| protected void stopSynchronization() |
| { |
| if (getType() == BACKUP) |
| { |
| doStopSynchronization(); |
| } |
| } |
| |
| @Override |
| public InternalCommitContext createCommitContext(InternalTransaction transaction) |
| { |
| if (getType() == BACKUP) |
| { |
| if (getState() != ONLINE) |
| { |
| throw new IllegalStateException("Backup repository is not online"); |
| } |
| |
| if (allowBackupCommits || transaction.getSession() == getReplicatorSession()) |
| { |
| return createWriteThroughCommitContext(transaction); |
| } |
| |
| throw new IllegalStateException( |
| "Only the repository synchronizer is allowed to commit transactions to a backup repository"); |
| } |
| |
| return createNormalCommitContext(transaction); |
| } |
| } |