public static boolean addVSensorInstance(VirtualSensor sensorPool) {
try {
if (logger.isInfoEnabled())
logger.info(
(new StringBuilder("Testing the pool for :"))
.append(sensorPool.getConfig().getName())
.toString());
sensorPool.returnVS(sensorPool.borrowVS());
} catch (Exception e) {
logger.error(e.getMessage(), e);
sensorPool.closePool();
logger.error(
"GSN can't load the virtual sensor specified at "
+ sensorPool.getConfig().getFileName()
+ " because the initialization of the virtual sensor failed (see above exception).");
logger.error("Please fix the following error");
return false;
}
TreeMap<String, Boolean> vsNameToOutputStructureFields = new TreeMap<String, Boolean>();
vsNamesToOutputStructureFields.put(
sensorPool.getConfig().getName(), vsNameToOutputStructureFields);
for (DataField fields : sensorPool.getConfig().getOutputStructure())
vsNameToOutputStructureFields.put(fields.getName(), Boolean.TRUE);
vsNameToOutputStructureFields.put("timed", Boolean.TRUE);
vsNameTOVSConfig.put(sensorPool.getConfig().getName(), sensorPool.getConfig());
fileNameToVSInstance.put(sensorPool.getConfig().getFileName(), sensorPool);
return true;
}
public void handle(HttpServletRequest request, HttpServletResponse response) throws IOException {
response.setStatus(HttpServletResponse.SC_OK);
String vsName = request.getParameter("name");
VSensorConfig sensorConfig = Mappings.getVSensorConfig(vsName);
if (logger.isInfoEnabled())
logger.info(
new StringBuilder()
.append("Structure request for *")
.append(vsName)
.append("* received.")
.toString());
StringBuilder sb = new StringBuilder("<virtual-sensor name=\"").append(vsName).append("\">\n");
for (DataField df : sensorConfig.getOutputStructure())
sb.append("<field name=\"")
.append(df.getName())
.append("\" ")
.append("type=\"")
.append(df.getType())
.append("\" ")
.append("description=\"")
.append(StringEscapeUtils.escapeXml(df.getDescription()))
.append("\" />\n");
sb.append(
"<field name=\"timed\" type=\"string\" description=\"The timestamp associated with the stream element\" />\n");
sb.append("</virtual-sensor>");
response.setHeader("Cache-Control", "no-store");
response.setDateHeader("Expires", 0);
response.setHeader("Pragma", "no-cache");
response.getWriter().write(sb.toString());
}
