plugins/org.eclipse.emf.cdo.net4j/src/org/eclipse/emf/cdo/internal/net4j/protocol/ChangeCredentialsRequest.java

/*
 * Copyright (c) 2013, 2014 Eike Stepper (Loehne, 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:
 *    Christian W. Damus (CEA LIST) - initial API and implementation
 */
package org.eclipse.emf.cdo.internal.net4j.protocol;

import org.eclipse.emf.cdo.common.protocol.CDODataInput;
import org.eclipse.emf.cdo.common.protocol.CDODataOutput;
import org.eclipse.emf.cdo.common.protocol.CDOProtocolConstants;
import org.eclipse.emf.cdo.internal.net4j.bundle.OM;
import org.eclipse.emf.cdo.session.CDOSession;

import org.eclipse.net4j.util.om.monitor.OMMonitor;
import org.eclipse.net4j.util.om.trace.ContextTracer;
import org.eclipse.net4j.util.security.CredentialsUpdateOperation;

import java.io.IOException;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.atomic.AtomicReference;

/**
 * Request from the client to the server to initiate (from the server) the change-credentials protocol.
 *
 * @author Christian W. Damus (CEA LIST)
 */
public class ChangeCredentialsRequest extends CDOClientRequestWithMonitoring<Boolean>
{
  static final ConcurrentMap<CDOSession, AtomicReference<char[]>> NEW_PASSWORD_RECEIVERS = new ConcurrentHashMap<>();

  private static final ContextTracer TRACER = new ContextTracer(OM.DEBUG_PROTOCOL, ChangeCredentialsRequest.class);

  private final CredentialsUpdateOperation operation;

  private final AtomicReference<char[]> newPasswordReceiver;

  private final String userID;

  public ChangeCredentialsRequest(CDOClientProtocol protocol, AtomicReference<char[]> newPasswordReceiver)
  {
    super(protocol, CDOProtocolConstants.SIGNAL_CHANGE_CREDENTIALS);
    operation = CredentialsUpdateOperation.CHANGE_PASSWORD;
    this.newPasswordReceiver = newPasswordReceiver;
    userID = null;
  }

  public ChangeCredentialsRequest(CDOClientProtocol protocol, String userID)
  {
    super(protocol, CDOProtocolConstants.SIGNAL_CHANGE_CREDENTIALS);
    operation = CredentialsUpdateOperation.RESET_PASSWORD;
    newPasswordReceiver = null;
    this.userID = userID;
  }

  @Override
  protected void requesting(CDODataOutput out, OMMonitor monitor) throws IOException
  {
    if (newPasswordReceiver != null)
    {
      NEW_PASSWORD_RECEIVERS.put(getSession(), newPasswordReceiver);
    }

    if (TRACER.isEnabled())
    {
      TRACER.format("Requesting %s of user credentials", operation); //$NON-NLS-1$
    }

    out.writeEnum(operation);
    out.writeString(userID);
  }

  @Override
  protected Boolean confirming(CDODataInput in, OMMonitor monitor) throws IOException
  {
    try
    {
      return in.readBoolean();
    }
    finally
    {
      NEW_PASSWORD_RECEIVERS.remove(getSession());
    }
  }
}