private static String cleanFileName(String groupName) {
StringBuilder scrubbedFile = new StringBuilder();
for (char c : groupName.toCharArray()) {
if (Character.isLetterOrDigit(c)) scrubbedFile.append(c);
else if (c == '-') scrubbedFile.append(c);
else if (c == '.') scrubbedFile.append(c);
}
return scrubbedFile.toString();
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
logger.debug("History Export Servlet called");
String key = request.getParameter("key");
logger.debug("Checking session for object with key " + key);
EnergyDataHistoryQueryResult result =
(EnergyDataHistoryQueryResult) request.getSession().getAttribute(key);
// Cehck to see if the object exists
if (result == null) {
if (logger.isWarnEnabled()) logger.warn("Results not found for key " + key);
response.setStatus(HttpServletResponse.SC_NOT_FOUND);
PrintWriter out = response.getWriter();
out.write("Gateway Not Found.");
out.close();
return;
}
StringBuilder fileNameBuilder = new StringBuilder();
fileNameBuilder
.append("export-")
.append(result.getGroup().getDescription())
.append("-")
.append(result.getHistoryType())
.append("-")
.append(result.getStartTime())
.append(".csv");
String fileName = cleanFileName(fileNameBuilder.toString().toLowerCase());
if (logger.isDebugEnabled()) logger.debug("Using filename " + fileName);
response.setHeader("Content-Type", "text/csv");
response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");
PrintWriter writer = response.getWriter();
// Create the header
writer.append("Date");
writer.append(",");
writer.append("Total Energy");
writer.append(",");
writer.append("Total Cost");
for (Gateway g : result.getGatewayList()) {
writer.append(",");
writer
.append(g.getDescription())
.append(" (")
.append(Long.toHexString(g.getId()).toUpperCase())
.append(") Power");
writer.append(",");
writer
.append(g.getDescription())
.append(" (")
.append(Long.toHexString(g.getId()).toUpperCase())
.append(") Cost");
}
writer.append("\n");
SimpleDateFormat dateFormat = getDateFormat(result.getHistoryType());
DecimalFormat pwrFormat = new DecimalFormat("0.000");
DecimalFormat cstFormat = new DecimalFormat("0.00");
int index = 0;
// Write each line of data.
for (EnergyDataHistory history : result.getNetHistoryList()) {
writer.append(dateFormat.format(history.getHistoryDate().getTime()));
writer.append(",");
writer.append(pwrFormat.format(history.getEnergy() / 1000.0));
writer.append(",");
writer.append(cstFormat.format(history.getCost()));
for (Gateway g : result.getGatewayList()) {
EnergyDataHistory gh = result.getGatewayHistoryList().get(g.getId()).get(index);
writer.append(",");
writer.append(pwrFormat.format(gh.getEnergy() / 1000.0));
writer.append(",");
writer.append(cstFormat.format(gh.getCost()));
}
writer.append("\n");
index++;
}
writer.flush();
writer.close();
logger.debug("Clearing out session object");
request.getSession().removeAttribute(key);
} catch (Exception ex) {
response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
logger.error("Error parsing inbound xml:" + ex.getMessage(), ex);
}
}
