org.openmrs.module.kenyaemr.SystemMonitorController.java Source code

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Here is the source code for org.openmrs.module.kenyaemr.SystemMonitorController.java

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/**
 * The contents of this file are subject to the OpenMRS Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://license.openmrs.org
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 *
 * Copyright (C) OpenMRS, LLC.  All Rights Reserved.
 */

package org.openmrs.module.kenyaemr;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.openmrs.module.kenyaemr.util.ServerInformation;
import org.openmrs.ui.framework.SimpleObject;
import org.openmrs.util.OpenmrsUtil;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * Provides JSON formatted system monitoring information
 */
@Controller
public class SystemMonitorController {

    protected static final Log log = LogFactory.getLog(SystemMonitorController.class);

    @RequestMapping(value = "/sysmon.form", method = RequestMethod.GET)
    public void get(HttpServletRequest request, HttpServletResponse response) throws IOException {
        SimpleObject output;

        if (checkAccess(request)) {
            log.info("Accepting system monitoring request from " + request.getRemoteAddr());
            output = getMonitoredData();
        } else {
            log.warn("Rejecting system monitoring request from " + request.getRemoteAddr() + " (server address is "
                    + request.getLocalAddr() + ")");
            response.setStatus(403);
            output = SimpleObject.create("error", "access denied");
        }

        response.setContentType("application/json");
        response.getWriter().write(output.toJson());
    }

    /**
     * Gets the data which is monitored
     * @return the simplified data
     */
    protected SimpleObject getMonitoredData() {
        SimpleObject stats = new SimpleObject();
        stats.put("server", ServerInformation.getAllInformation());
        return stats;
    }

    /**
     * Checks if incoming request for system monitoring data should be allowed
     * @param request the request
     * @return true if request should be allowed
     */
    protected boolean checkAccess(HttpServletRequest request) {
        // For now just check that request is local
        return OpenmrsUtil.nullSafeEquals(request.getRemoteAddr(), request.getLocalAddr());
    }
}