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/***************************************************************************
* Copyright (c) 2004 - 2008 Eike Stepper, Germany.
* 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.server;
/**
* @author Eike Stepper
*/
public interface IStore extends IRepositoryElement
{
public void setRepository(IRepository repository);
public String getStoreType();
/**
* Returns if this store supports the writing of modified newRevisions in terms of deltas.
* <p>
* The contract includes that store implementations with write delta support must also implement
* {@link IStoreWriter#writeRevisionDelta(org.eclipse.emf.cdo.internal.protocol.revision.delta.CDORevisionDeltaImpl) IStoreWriter.writeRevisionDelta(CDORevisionDeltaImpl)}
* to not throw an <code>UnsupportedOperationException</code>.
*
* @return <code>true</code> if this store supports the writing of modified newRevisions in terms of deltas,
* <code>false</code> otherwise.
*/
public boolean hasWriteDeltaSupport();
/**
* Returns if this store supports the retrieval of historical newRevisions.
* <p>
* The contract includes that store implementations with auditing support must also implement
* {@link IStoreReader#readRevisionByTime(org.eclipse.emf.cdo.protocol.CDOID, int, long) IStoreReader.readRevisionByTime(CDOID, int, long)}
* to not throw an <code>UnsupportedOperationException</code>.
*
* @return <code>true</code> if this store supports the retrieval of historical newRevisions, <code>false</code>
* otherwise.
*/
public boolean hasAuditingSupport();
/**
* Returns if this store supports the storage of concurrent newRevisions in separate branches.
* <p>
* Note: This is reserved for future use by the framework. There is currently no support for branching in the
* framework!
*
* @return <code>true</code> if this store supports the storage of concurrent newRevisions in separate branches,
* <code>false</code> otherwise.
*/
public boolean hasBranchingSupport();
public boolean wasCrashed();
public void repairAfterCrash();
/**
* Returns a reader that can be used to read from this store in the context of the given session.
*
* @param session
* The session that should be used as a context for read access or <code>null</code>. The store
* implementor is free to interpret and use the session in a manner suitable for him or ignore it at all. It
* is meant only as a hint. Implementor can use it as a key into a cache and/or register a
* {@link org.eclipse.net4j.internal.util.lifecycle.LifecycleEventAdapter LifecycleEventAdapter} with it to
* intercept cleanup on session close. Note however that the session can be <code>null</code>, for example
* during startup of the server while the repositories are initialized but before any user session has been
* opened.
* @return a reader that can be used to read from this store in the context of the given session, never
* <code>null</code>.
*/
public IStoreReader getReader(ISession session);
/**
* Returns a writer that can be used to write to this store in the context of the given view. The given view is always
* marked as a transaction.
*
* @param view
* The view that must be used as a context for write access. The store implementor is free to interpret and
* use the view in a manner suitable for him or ignore it at all. It is meant only as a hint. Implementor can
* use it as a key into a cache and/or register a
* {@link org.eclipse.net4j.internal.util.lifecycle.LifecycleEventAdapter LifecycleEventAdapter} with it to
* intercept cleanup on view close.
* @return a writer that can be used to write to this store in the context of the given view, never <code>null</code>.
*/
public IStoreWriter getWriter(IView view);
}
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