net.sf.appstatus.web.pages.RadiatorPage.java Source code

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/*
 * Copyright 2010-2013 Capgemini Licensed under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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 net.sf.appstatus.web.pages;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.util.List;

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

import net.sf.appstatus.core.batch.IBatchManager;
import net.sf.appstatus.core.check.ICheckResult;
import net.sf.appstatus.web.IPage;
import net.sf.appstatus.web.StatusWebHandler;

import org.apache.commons.lang3.StringUtils;

/**
 * This is an Alpha radiator page. (Alpha version)
 * <p>
 * This page displays a quick overview of the application and reloads every
 * minute.
 *
 * @author Nicolas Richeton
 *
 */
public class RadiatorPage implements IPage {

    private static final int STATUS_ERROR = 2;
    private static final int STATUS_OK = 0;
    private static final int STATUS_WARN = 1;

    public void doGet(StatusWebHandler webHandler, HttpServletRequest req, HttpServletResponse resp)
            throws UnsupportedEncodingException, IOException {

        // Setup response
        resp.setContentType("text/html");
        resp.setCharacterEncoding("UTF-8");

        // Get Health checks
        List<ICheckResult> results = webHandler.getAppStatus().checkAll(req.getLocale());
        int status = STATUS_OK;
        for (ICheckResult r : results) {

            if (r.getCode() != ICheckResult.OK && !r.isFatal() && status == STATUS_OK) {
                status = STATUS_WARN;
            }

            if (r.getCode() != ICheckResult.OK && r.isFatal()) {
                status = STATUS_ERROR;
                break;
            }
        }

        String btnClass = "btn-success";
        if (status == STATUS_WARN) {
            btnClass = "btn-warning";
        }

        if (status == STATUS_ERROR) {
            btnClass = "btn-danger";
        }

        // Get batchs status.
        IBatchManager manager = webHandler.getAppStatus().getBatchManager();

        String batchStatus = " progress-success ";
        String active = StringUtils.EMPTY;
        int width = 0;

        if (manager != null) {
            batchStatus = manager.getErrorBatches().size() > 0 ? " progress-danger " : " progress-success ";
            active = manager.getRunningBatches().size() > 0 ? " progress-striped active " : "";
            width = manager.getRunningBatches().size() + manager.getFinishedBatches().size() > 0 ? 100 : 0;
        }

        Writer w = resp.getWriter();
        w.append("<html>");
        w.append("<head>");
        w.append("<meta http-equiv=\"refresh\" content=\"60;\">");
        w.append("<link href=\"?resource=appstatus.css\" rel=\"stylesheet\">");
        w.append("</head>");
        w.append("<body style=\"background: #000; text-align: center; padding-top: 5%;\">");
        w.append("<p style=\"color: #fff; font-size: 200%;\" >" + webHandler.getApplicationName() + "</p>");
        w.append("<p style=\" padding-top: 10%;\"><a href=\"?p=status\" target=\"_blank\" class=\"btn btn-large "
                + btnClass + "\" >Status</a></p>");
        w.append("<div class=\"progress " + batchStatus + active
                + "\" style=\"margin-top: 5%; width: 90%; margin-left: 5%; margin-right: 5%;\">  <div class=\"bar\" style=\"width: "
                + width + "%;\"></div></div>");
        w.append("</body></html>");
    }

    public void doPost(StatusWebHandler webHandler, HttpServletRequest req, HttpServletResponse resp) {
        // Nothing to do
    }

    public String getId() {
        return "radiator";
    }

    public String getName() {
        return "Radiator";
    }

}