Registering new atmosphere mapping -- Real Time Logging Project

LoggingService.groovy

// Registering an application's logging instance either means creating a new mapping for it.
// If a mapping already exists, update its "latest update time" property.
private def registerApplicationInstance(String ipAddress, String hostname, String appName) {
    if (!applications[appName]) {
        applications[appName] = []
    }
    def existing = findApplicationObject(appName, ipAddress, hostname)
    if (!existing) {
        // Register the new application and create a unique mapping for it.
        applications[appName] << [ipAddress: ipAddress, hostname: hostname, lastUpdateTime: new LocalDateTime()]
        addAtmosphereHandler("$MAPPING_URI/logchannel/${appName}/${ipAddress}/${hostname}")

        // Broadcast to the default channel, letting the UI know that we have new loggers
        broadcaster["$MAPPING_URI/all"].broadcast( (applications as JSON).toString(true) )
    } else {
        existing.lastUpdateTime = new LocalDateTime()
    }
}

private void addAtmosphereHandler(String mapping) {
    // Extract the stratosphere servlet from the servlet context
    StratosphereServlet stratosphereServlet = grailsApplication.mainContext.servletContext[com.odelia.grails.plugins.atmosphere.StratosphereServlet.ATMOSPHERE_PLUGIN_ATMOSPHERE_SERVLET]

    // Register the new mapping with the stratosphere servlet, this will let the UI have a unique endpoint for each specific application logging instance
    def atmosphereHandler = new GrailsHandler(targetService: this, servletContext: grailsApplication.mainContext.servletContext)
    stratosphereServlet.addAtmosphereHandler(mapping, atmosphereHandler)
}