nl.sense_os.commonsense.main.client.logout.LogoutActivity.java Source code

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Here is the source code for nl.sense_os.commonsense.main.client.logout.LogoutActivity.java

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/*******************************************************************************
 * Copyright 2011 Google Inc. All Rights Reserved.
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package nl.sense_os.commonsense.main.client.logout;

import java.util.logging.Logger;

import nl.sense_os.commonsense.common.client.communication.CommonSenseApi;
import nl.sense_os.commonsense.common.client.communication.SessionManager;
import nl.sense_os.commonsense.main.client.MainClientFactory;
import nl.sense_os.commonsense.main.client.MainEntryPoint;

import com.google.gwt.activity.shared.AbstractActivity;
import com.google.gwt.event.shared.EventBus;
import com.google.gwt.http.client.Request;
import com.google.gwt.http.client.RequestCallback;
import com.google.gwt.http.client.Response;
import com.google.gwt.user.client.ui.AcceptsOneWidget;

/**
 * Activities are started and stopped by an ActivityManager associated with a container Widget.
 */
public class LogoutActivity extends AbstractActivity implements LogoutView.Presenter {

    private static final Logger LOG = Logger.getLogger(LogoutActivity.class.getName());

    /**
     * Used to obtain views, eventBus, placeController. Alternatively, could be injected via GIN.
     */
    private final MainClientFactory clientFactory;

    public LogoutActivity(LogoutPlace place, MainClientFactory clientFactory) {
        this.clientFactory = clientFactory;
    }

    /**
     * Requests logout of session from CommonSense
     */
    private void logout() {
        LOG.finest("Log out");
        RequestCallback callback = new RequestCallback() {

            @Override
            public void onError(Request request, Throwable exception) {
                onLogoutError(-1, exception);
            }

            @Override
            public void onResponseReceived(Request request, Response response) {
                onLogoutResponse(response);
            }
        };
        CommonSenseApi.logout(callback);
    }

    /**
     * Handles response to logout request
     * 
     * @param response
     */
    private void onLogoutResponse(Response response) {
        if (Response.SC_OK == response.getStatusCode()) {
            onLogoutSuccess();
        } else {
            onLogoutError(response.getStatusCode(), new Throwable(response.getStatusText()));
        }
    }

    /**
     * Handles successful logout
     */
    private void onLogoutSuccess() {
        SessionManager.removeSessionId();
        MainEntryPoint.goToLoginPage();
    }

    /**
     * Handles failed logout requests
     * 
     * @param code
     *            Error code
     * @param error
     *            Error message
     */
    private void onLogoutError(int code, Throwable error) {
        // TODO Handle logout failure
        LOG.warning("Logout failure! Code: " + code + " " + error);
        onLogoutSuccess();
    }

    @Override
    public void start(AcceptsOneWidget containerWidget, EventBus eventBus) {
        LOG.info("Start 'logout' activity");

        // show view
        LogoutView view = clientFactory.getLogoutView();
        view.setPresenter(this);
        containerWidget.setWidget(view.asWidget());

        // log out
        logout();
    }
}