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SymmetricDS is an open source database synchronization solution. It is platform-independent, web-enabled, and database-agnostic. SymmetricDS was first built to replicate changes between 'retail store' databases and ad centralized 'corporate' database.

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/*
 * Licensed to JumpMind Inc under one or more contributor 
 * license agreements.  See the NOTICE file distributed
 * with this work for additional information regarding 
 * copyright ownership.  JumpMind Inc licenses this file
 * to you under the GNU Lesser General Public License (the
 * "License"); you may not use this file except in compliance
 * with the License. 
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see           
 * .
 * 
 * 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 org.jumpmind.symmetric.web;

import java.io.IOException;
import java.io.OutputStream;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang.StringUtils;
import org.jumpmind.symmetric.ext.IBuiltInExtensionPoint;
import org.jumpmind.symmetric.model.Node;
import org.jumpmind.symmetric.service.RegistrationRedirectException;
import org.jumpmind.symmetric.transport.handler.RegistrationResourceHandler;
import org.jumpmind.symmetric.transport.http.HttpTransportManager;

/**
 * ,
 */
public class RegistrationServlet extends AbstractTransportResourceServlet 
    implements IBuiltInExtensionPoint {

    private static final long serialVersionUID = 1L;

    @Override
    public boolean isContainerCompatible() {
        return true;
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        Node node = transform(req);

        try {
            OutputStream outputStream = createOutputStream(resp);
            if (!getTransportResourceHandler().registerNode(node, outputStream)) {
                log.warn("RegistrationNotAllowed", node);
                sendError(resp, WebConstants.REGISTRATION_NOT_OPEN, String.format("%s was not allowed to register.",
                        node));
            }
        } catch (RegistrationRedirectException e) {
            resp.sendRedirect(HttpTransportManager.buildRegistrationUrl(e.getRedirectionUrl(), node));
        }
    }

    private Node transform(HttpServletRequest req) {
        Node node = new Node();
        node.setNodeGroupId(getParameter(req, WebConstants.NODE_GROUP_ID));
        node.setSymmetricVersion(getParameter(req, WebConstants.SYMMETRIC_VERSION));
        node.setExternalId(getParameter(req, WebConstants.EXTERNAL_ID));
        String syncUrlString = getParameter(req, WebConstants.SYNC_URL);
        if (StringUtils.isNotBlank(syncUrlString)) {
            node.setSyncUrl(syncUrlString);
        }
        node.setSchemaVersion(getParameter(req, WebConstants.SCHEMA_VERSION));
        node.setDatabaseType(getParameter(req, WebConstants.DATABASE_TYPE));
        node.setDatabaseVersion(getParameter(req, WebConstants.DATABASE_VERSION));
        return node;
    }

}