PVsByStorageConsumed.java

package org.epics.archiverappliance.etl.bpl.reports;

import java.io.IOException;
import java.io.PrintWriter;
import java.text.DecimalFormat;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;

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

import org.apache.log4j.Logger;
import org.epics.archiverappliance.common.BPLAction;
import org.epics.archiverappliance.config.ConfigService;
import org.epics.archiverappliance.etl.bpl.reports.StorageWithLifetime.StorageConsumedByPV;
import org.epics.archiverappliance.utils.ui.MimeTypeConstants;
import org.json.simple.JSONValue;

public class PVsByStorageConsumed implements BPLAction {
	private static Logger logger = Logger.getLogger(PVsByStorageConsumed.class.getName());
	@Override
	public void execute(HttpServletRequest req, HttpServletResponse resp, ConfigService configService) throws IOException {
		String limitStr = req.getParameter("limit");
		logger.info("Storage consumed report for " + (limitStr == null ? "default limit(100) " : ("limit " + limitStr)));
		if(limitStr == null || limitStr.equals("")) limitStr = "100";
		int limit = Integer.parseInt(limitStr);
		resp.setContentType(MimeTypeConstants.APPLICATION_JSON);
		String applianceIdentity = configService.getMyApplianceInfo().getIdentity();
		List<StorageConsumedByPV> pvsByStorageConsumed = StorageWithLifetime.getPVSByStorageConsumed(configService);
		if(pvsByStorageConsumed.size() > limit) {
			pvsByStorageConsumed = pvsByStorageConsumed.subList(0, limit);
		}

		LinkedList<HashMap<String, String>> result = new LinkedList<HashMap<String, String>>();
		try (PrintWriter out = resp.getWriter()) {
			DecimalFormat twoSignificantDigits = new DecimalFormat("###,###,###,###,###,###.##");
			for(StorageConsumedByPV storageConsumedByPV : pvsByStorageConsumed) {
				HashMap<String, String> pvStorageConsumed = new HashMap<String, String>();
				result.add(pvStorageConsumed);
				pvStorageConsumed.put("pvName", storageConsumedByPV.pvName);
				pvStorageConsumed.put("instance", applianceIdentity);
				pvStorageConsumed.put("storageConsumed", Long.toString(storageConsumedByPV.storageConsumed));
				pvStorageConsumed.put("storageConsumedInMB", twoSignificantDigits.format(storageConsumedByPV.storageConsumed*1.0/(1024*1024)));
			}

			out.println(JSONValue.toJSONString(result));
		}
	}
}