public WebRoleData()
{
GenUtils.LogMsg("info", String.Format("WebRoleData: {0}, {1}, {2}, {3}", procname, procid, domain_name, thread_id), null);
MakeWhereAndWhatAndRegionIdLists();
var ids = Metadata.LoadHubIdsFromAzureTable();
Parallel.ForEach(ids, id =>
//foreach (var id in ids)
{
GenUtils.LogMsg("info", "GatherWebRoleData: readying: " + id, null);
var cr = Utils.AcquireRenderer(id);
lock (this.renderers)
{
this.renderers.Add(id, cr);
}
lock (this.ready_ids)
{
this.ready_ids.Add(id);
}
});
//}
// this pipe-delimited string defines allowed IDs in the /services/ID/... URL pattern
this.str_ready_ids = String.Join("|", this.ready_ids.ToArray());
GenUtils.LogMsg("info", "GatherWebRoleData: str_ready_ids: " + this.str_ready_ids, null);
}
public void GeneralAdmin(object o, ElapsedEventArgs args)
{
try
{
GenUtils.PriorityLogMsg("status", "GeneralAdmin", null);
Utils.MakeWhereSummary(); // refresh http://elmcity.blob.core.windows.net/admin/where_summary.html
Utils.MakeWhatSummary(); // refresh http://elmcity.blob.core.windows.net/admin/what_summary.html
var ids = Metadata.LoadWhatWhereIdsFromAzureTable();
Parallel.ForEach(source: ids, body: (id) =>
{
var calinfo = Utils.AcquireCalinfo(id);
Utils.SaveIcalPerFeedLocations(calinfo, settings);
});
}
catch (Exception e)
{
GenUtils.LogMsg("exception", "GeneralAdmin", e.Message + e.StackTrace);
}
//Utils.MakeFeaturedHubs(); // idle for now
}
private static string CallSearchApi(Uri search_url)
{
var delay = 2;
try
{
delay = Convert.ToInt32(settings["search_engine_api_delay_secs"]);
}
catch (Exception e)
{
GenUtils.PriorityLogMsg("exception", "CallSearchApi", e.Message + e.StackTrace);
}
Utils.Wait(delay);
var r = HttpUtils.FetchUrl(search_url);
if (r.status != HttpStatusCode.OK)
{
GenUtils.LogMsg("warning", "CallSearchApi" + r.status.ToString(), search_url.ToString());
return(null);
}
else
{
return(r.DataAsString());
}
}
public static WebRoleData MakeWebRoleData()
{
WebRoleData wrd = null;
try // create WebRoleData structure and store as blob, available to webrole on next _reload
{
var sw = new Stopwatch();
sw.Start();
wrd = new WebRoleData();
sw.Stop();
GenUtils.LogMsg("info", "new wrd: " + sw.Elapsed.ToString(), null);
var info = String.Format("new wrd: where_ids: {0}, what_ids: {1}, region_ids {2}", wrd.where_ids.Count, wrd.what_ids.Count, wrd.region_ids.Count);
GenUtils.LogMsg("info", info, null);
GenUtils.LogMsg("info", "new wrd: " + wrd.str_ready_ids, null);
sw.Start();
if (wrd.IsConsistent())
{
SaveWrd(wrd);
}
else
{
GenUtils.PriorityLogMsg("warning", "MakeWebRoleData: inconsistent", null);
wrd = GetWrd(); // fall back to last known good
}
sw.Stop();
GenUtils.LogMsg("info", "save wrd: " + sw.Elapsed.ToString(), null);
}
catch (Exception e3)
{
GenUtils.PriorityLogMsg("exception", "MakeWebRoleData: creating wrd", e3.Message);
}
return(wrd);
}
public static void SaveRegionStats(string region)
{
GenUtils.LogMsg("status", "SaveRegionStats: " + region, null);
var ids = Utils.GetIdsForRegion(region);
var region_report = new StringBuilder();
var chunks = new Dictionary<string, string>();
Parallel.ForEach(source: ids, body: (id) =>
{
var hub_report = new StringBuilder();
hub_report.Append("<h1>" + id + "</h1>\n");
var hub_report_uri = BlobStorage.MakeAzureBlobUri(id, id + ".stats.html");
var hub_report_html = HttpUtils.FetchUrl(hub_report_uri).DataAsString();
var doc = new HtmlDocument();
doc.LoadHtml(hub_report_html);
hub_report.AppendLine("<table style=\"border-spacing:6px\" class=\"icalstats\">");
var table = doc.DocumentNode.SelectSingleNode("//table");
hub_report.AppendLine(table.WriteContentTo());
hub_report.AppendLine("</table>");
lock (chunks)
{
chunks[id] = hub_report.ToString(); // to enable sorted output
}
}
);
foreach (var id in ids)
region_report.AppendLine(chunks[id]);
var region_calinfo = Utils.AcquireCalinfo(region);
var report = Utils.EmbedHtmlSnippetInDefaultPageWrapper(region_calinfo, region_report.ToString());
bs.PutBlob(region, region + ".stats.html", report, "text/html");
}
public static void ProcessIcal(string id)
{
var calinfo = Utils.AcquireCalinfo(id);
GenUtils.LogMsg("status", "worker starting on ical tasks for " + id, null);
var fr = new FeedRegistry(id);
DoIcal(fr, calinfo);
}
public static void EnsureTaskRecord(string id, TaskType type)
{
if (Scheduler.ExistsTaskRecordForId(id, type) == false)
{
GenUtils.LogMsg("status", "MaybeCreateTaskRecord: creating task for " + id, null);
Scheduler.InitTaskForId(id, type);
}
}
public static void StoreTaskForId(Task task, string id, TaskType type)
{
task.hostname = System.Net.Dns.GetHostName();
var dict_obj = ObjectUtils.ObjToDictObj(task);
var tasktable = type.ToString();
var ts_response = TableStorage.UpmergeDictToTableStore(dict_obj, table: tasktable, partkey: master_pk, rowkey: id);
GenUtils.LogMsg("status", "Scheduler.StoreTaskForId: " + id, null);
}
public override void OnStop()
{
var msg = "Worker: OnStop";
GenUtils.LogMsg("status", msg, null);
GenUtils.PriorityLogMsg("status", msg, null);
var snapshot = Counters.MakeSnapshot(Counters.GetCounters());
monitor.StoreSnapshot(snapshot);
base.OnStop();
}
public static void ProcessRegion(string region)
{
if ( ! Utils.IsRegion (region) )
throw new Exception(String.Format("ProcessRegion called erroneously for {0}", region));
GenUtils.LogMsg("status", "worker starting on region tasks for " + region, null);
var calinfo = Utils.AcquireCalinfo(region);
try
{
var es_region = new ZonelessEventStore(calinfo);
var ids = Utils.GetIdsForRegion(region);
Parallel.ForEach(source: ids, body: (id) =>
{
var uri = BlobStorage.MakeAzureBlobUri(id, id + ".zoneless.obj", false);
var es = (ZonelessEventStore)BlobStorage.DeserializeObjectFromUri(uri);
foreach (var evt in es.events)
{
evt.categories += "," + id.ToLower(); // so tag viewer can slice region by hub name
lock (es_region)
{
es_region.events.Add(evt);
}
}
}
);
Utils.UpdateFeedCountForId(region);
ZonelessEventStore.Finalize(calinfo, es_region);
CacheUtils.MarkBaseCacheEntryForRemoval(Utils.MakeBaseZonelessUrl(region), Convert.ToInt32(settings["webrole_instance_count"]));
RenderTags(region);
Utils.TagsByHub(region, authorized: true);
Utils.TagsByHub(region, authorized: false);
SaveRegionStats(region);
ImageSelection.BuildCategoryImagesForHub(region);
Utils.SaveQuickStatsForRegion(region);
}
catch (Exception e)
{
var msg = "process region: " + region;
var data = e.Message + e.StackTrace;
GenUtils.PriorityLogMsg("exception", msg, data);
}
GenUtils.LogMsg("status", "worker done processing region " + region, null);
}
public void ViewFilterReturnsOneEvent()
{
var filterable = this.CreateFilterable(calinfo);
GenUtils.LogMsg("status", "ViewFilterReturnsOneEvent before", ShowEventStore(filterable.events));
var events = cr.Filter("music", 0, DateTime.MinValue, DateTime.MinValue, null, filterable, new Dictionary <string, object>());
GenUtils.LogMsg("status", "ViewFilterReturnsOneEvent after", ShowEventStore(events));
Assert.That(events.Count == 1);
Assert.That(events.First().title == "e5");
}
public static void FinalizeHub(string id)
{
if (Utils.IsRegion(id))
throw new Exception(String.Format("FinalizeHub called erroneously for {0}", id));
GenUtils.LogMsg("status", "worker finalizing hub: " + id, null);
Utils.UpdateFeedCountForId(id);
var calinfo = Utils.AcquireCalinfo(id);
EventStore.CombineZonedEventStoresToZonelessEventStore(id, settings);
// Create or update an entry in the cacheurls table for the base object.
// key is http://elmcity.blob.core.windows.net/ID/ID.zoneless.obj
// value is # of webrole instances that could be holding this in cache
// each instance will check this table periodically. if value is nonzero and url in cache, it'll evict the object
// and decrement the count
// note when removal occurs it also triggers a purge of dependencies, so if the base entry is
// http://elmcity.blob.core.windows.net/a2cal/a2cal.zoneless.obj
// then dependencies also ousted from cache include:
// /services/a2cal/html?view=&count=0
// /services/a2cal/rss?view=government
// /services/a2cal/xml?view=music&count=10 ... etc.
CacheUtils.MarkBaseCacheEntryForRemoval(Utils.MakeBaseZonelessUrl(id), Convert.ToInt32(settings["webrole_instance_count"]));
RenderTags(id); // static renderings, mainly for debugging now that GetEvents uses dynamic rendering
var fr = new FeedRegistry(id);
fr.LoadFeedsFromAzure(FeedLoadOption.all);
if (calinfo.hub_enum == HubType.where)
{
SaveWhereStats(fr, calinfo);
Utils.SaveMeetupLocations(calinfo, settings);
}
if (calinfo.hub_enum == CalendarAggregator.HubType.what)
SaveWhatStats(fr, calinfo);
//if (!Utils.IsRegion(id))
// MergeIcs(calinfo);
// else
// todo: create MergeRegionIcs
Utils.VisualizeTagSources(id);
ImageSelection.BuildCategoryImagesForHub(id);
GenUtils.LogMsg("status", "worker done finalizing hub " + id, null);
}
public static void InitTaskForId(string id, TaskType type)
{
Scheduler.UnlockId(id, type);
var task = new Task(id);
var dict_obj = ObjectUtils.ObjToDictObj(task);
var tasktable = type.ToString();
var ts_response = TableStorage.UpdateDictToTableStore(dict_obj, table: tasktable, partkey: master_pk, rowkey: id);
var http_response = ts_response.http_response;
GenUtils.LogMsg("status", "Scheduler.InitTaskForId: " + id, http_response.status.ToString());
}
public static void StopTaskForId(string id, TaskType type)
{
var task = new Dictionary <string, object>();
task["id"] = id;
task["stop"] = DateTime.UtcNow;
task["status"] = TaskStatus.stopped.ToString();
var tasktable = type.ToString();
var ts_response = TableStorage.UpmergeDictToTableStore(task, table: tasktable, partkey: master_pk, rowkey: id);
GenUtils.LogMsg("status", "Scheduler.StopTaskForId: " + id, ts_response.http_response.status.ToString());
}
/*
# runs blobroot/monitor.py
# pull 48 hours of diagnostics from odata feed into a file
# run logparser queries against the file
# output charts (gifs) and/or tables (htmls) to charts container in azure storage
# calls blobroot/dashboard.py to update pages that include charts and tables
*/
public static void MonitorAdmin(object o, ElapsedEventArgs args)
{
GenUtils.LogMsg("status", "MonitorAdmin", null);
try
{
PythonUtils.RunIronPython(local_storage_path, CalendarAggregator.Configurator.monitor_script_url, new List<string>() { "", "", "" });
}
catch (Exception e)
{
GenUtils.LogMsg("exception", "MonitorAdmin", e.Message + e.StackTrace);
}
}
private static bool AcquireLock(string id, TaskType type)
{
var lock_response = Scheduler.LockId(id, type);
if (lock_response.status != HttpStatusCode.Created)
{
GenUtils.LogMsg("warning", "LockId", "expected to create lock but could not");
return false;
}
else
return true;
}
public static void MaybeRemakeWebRoleData()
{
var webrole_sentinel_uri = BlobStorage.MakeAzureBlobUri("admin", CalendarAggregator.Configurator.webrole_sentinel, false);
if (BlobStorage.ExistsBlob(webrole_sentinel_uri))
{
var list = HttpUtils.FetchUrl(webrole_sentinel_uri).DataAsString();
GenUtils.LogMsg("status", "worker role remaking wrd for " + list, null);
var args = new Dictionary<string, string>();
WebRoleData.MakeWebRoleData();
bs.DeleteBlob("admin", CalendarAggregator.Configurator.webrole_sentinel);
}
}
private static void HandleFeedAdds(string id, List <Dictionary <string, string> > list_metadict_str, List <string> current_feed_urls, List <string> existing_feed_urls)
{
var added_feed_urls = current_feed_urls.Except(existing_feed_urls);
foreach (string added_feed_url in added_feed_urls)
{
var rowkey = TableStorage.MakeSafeRowkeyFromUrl(added_feed_url);
var entity = (Dictionary <string, string>)list_metadict_str.Find(feed => feed["feedurl"] == added_feed_url);
TableStorage.UpdateDictToTableStore(ObjectUtils.DictStrToDictObj(entity), "metadata", id, rowkey);
}
GenUtils.LogMsg("status", "UpdateFeedsForId: find deleted and delete", null);
}
private static List <string> HandleFeedDeletes(string id, TableStorage ts, List <string> current_feed_urls, List <string> existing_feed_urls)
{
var deleted_feed_urls = existing_feed_urls.Except(current_feed_urls);
foreach (string deleted_feed_url in deleted_feed_urls)
{
var rowkey = TableStorage.MakeSafeRowkeyFromUrl(deleted_feed_url);
ts.DeleteEntity("metadata", id, rowkey);
}
GenUtils.LogMsg("status", "UpdateFeedsForId: find updated and update", null);
return(deleted_feed_urls.ToList());
}
// runs _admin.py from blobroot/admin, most duties have migrated out of python and into c#
public static void IronPythonAdmin(object o, ElapsedEventArgs e)
{
try
{
GenUtils.LogMsg("status", "IronPythonAdmin", null);
PythonUtils.RunIronPython(local_storage_path, CalendarAggregator.Configurator.iron_python_admin_script_url, new List<string>() { "", "", "" });
}
catch (Exception ex)
{
GenUtils.LogMsg("exception", "IronPythonAdmin", ex.Message + ex.StackTrace);
}
}
public override bool OnStart()
{
var local_resource = RoleEnvironment.GetLocalResource("LocalStorage1");
GenUtils.LogMsg("status", "LocalStorage1", local_resource.RootPath);
RoleEnvironment.Changing += RoleEnvironmentChanging;
var msg = String.Format("WebRole OnStart: {0} {1} {2} {3}", procname, procid, domain_name, thread_id);
GenUtils.PriorityLogMsg("info", msg, null);
return(base.OnStart());
}
public static HttpResponse UpdateStartTaskForId(string id, TaskType type)
{
var task = new Dictionary <string, object>();
task["id"] = id;
task["start"] = DateTime.UtcNow;
task["status"] = TaskStatus.running.ToString();
task["hostname"] = System.Net.Dns.GetHostName();
var tasktable = type.ToString();
var ts_response = TableStorage.UpmergeDictToTableStore(task, tasktable, partkey: master_pk, rowkey: id);
var http_response = ts_response.http_response;
GenUtils.LogMsg("status", "Scheduler.UpdateStartTaskForId: " + id, http_response.status.ToString());
return(http_response);
}
public static void MakeTablesAndCharts(Object o, ElapsedEventArgs e)
{
GenUtils.LogMsg("status", "MakeTablesAndCharts", null);
try
{
PythonUtils.RunIronPython(WebRole.local_storage_path, CalendarAggregator.Configurator.charts_and_tables_script_url, new List <string>()
{
"", "", ""
});
}
catch (Exception ex)
{
GenUtils.PriorityLogMsg("exception", "MakeTablesAndCharts", ex.Message + ex.StackTrace);
}
}
public static void RenderTags(string id)
{
var cr = Utils.AcquireRenderer(id);
try
{
var es = ObjectUtils.GetTypedObj<ZonelessEventStore>(id, id + ".zoneless.obj");
var tags = cr.MakeTagCloud(es);
var tags_json = JsonConvert.SerializeObject(tags);
bs.PutBlob(id, CalendarAggregator.Configurator.tags_json, tags_json);
}
catch (Exception e)
{
GenUtils.LogMsg("exception", "save tags_json: " + id, e.Message + e.StackTrace);
}
}
public static void TestRunnerAdmin(object o, ElapsedEventArgs args)
{
GenUtils.LogMsg("status", "TestRunnerAdmin", null);
var calinfo = new Calinfo(ElmcityUtils.Configurator.azure_compute_account);
try
{
var ca_failed = GenUtils.RunTests("CalendarAggregator");
var eu_failed = GenUtils.RunTests("ElmcityUtils");
//failed += GenUtils.RunTests("WorkerRole");
//failed += GenUtils.RunTests("WebRole");
var clean = (ca_failed == "" && eu_failed == "");
var msg = clean ? "clean at " : "failures at ";
bs.PutBlob("admin", "testrunner", msg + "\n" + ca_failed + "\n" + eu_failed + "\n" + System.DateTime.UtcNow.ToString(), "text/plain");
}
catch (Exception e)
{
GenUtils.PriorityLogMsg("exception", "TestRunnerAdmin", e.Message + e.StackTrace);
}
}
public static void SaveWhereStats(FeedRegistry fr, Calinfo calinfo)
{
var id = calinfo.id;
GenUtils.LogMsg("status", "SaveWhereStats: " + id, null);
NonIcalStats estats = GetNonIcalStats(NonIcalType.eventful, id, calinfo, settings);
NonIcalStats ustats = GetNonIcalStats(NonIcalType.upcoming, id, calinfo, settings);
NonIcalStats ebstats = GetNonIcalStats(NonIcalType.eventbrite, id, calinfo, settings);
NonIcalStats fbstats = GetNonIcalStats(NonIcalType.facebook, id, calinfo, settings);
Dictionary<string, IcalStats> istats = GetIcalStats(id);
var where = calinfo.where;
string[] response = Utils.FindCityOrTownAndStateAbbrev(where);
var city_or_town = response[0];
var state_abbrev = response[1];
int pop = Utils.FindPop(id, city_or_town, state_abbrev);
var futurecount = 0;
futurecount += estats.eventcount;
futurecount += ustats.eventcount;
futurecount += ebstats.eventcount;
var sb_report = new StringBuilder();
sb_report.Append(MakeTableHeader());
var options = new ParallelOptions();
Parallel.ForEach(source: fr.feeds.Keys, parallelOptions: options, body: (feedurl) =>
// foreach (var feedurl in fr.feeds.Keys)
{
StatsRow(id, istats, sb_report, ref futurecount, feedurl);
}
);
sb_report.Append("</table>\n");
var events_per_person = Convert.ToInt32(futurecount) / (float)pop;
var report = Utils.EmbedHtmlSnippetInDefaultPageWrapper(calinfo, sb_report.ToString());
bs.PutBlob(id, id + ".stats.html", new Hashtable(), Encoding.UTF8.GetBytes(report), "text/html");
var dict = new Dictionary<string, object>();
dict.Add("events", futurecount.ToString());
dict.Add("events_per_person", string.Format("{0:f}", events_per_person));
TableStorage.UpmergeDictToTableStore(dict, "metadata", id, id);
}
public static void MergeIcs(Calinfo calinfo)
{
var id = calinfo.id;
GenUtils.LogMsg("status", "MergeIcs: " + id, null);
List<string> suffixes = new List<string>() { "ical" };
if (calinfo.hub_enum == HubType.where)
foreach (NonIcalType type in Enum.GetValues(typeof(CalendarAggregator.NonIcalType)))
{
if (Utils.UseNonIcalService(type, settings, calinfo) == true)
suffixes.Add(type.ToString());
}
try
{
var all_ical = new iCalendar();
Collector.AddTimezoneToDDayICal(all_ical, calinfo.tzinfo);
foreach (var suffix in suffixes) // todo: skip if disabled in settings
{
var url = MakeIcsUrl(id, suffix);
try
{
var feedtext = HttpUtils.FetchUrl(url).DataAsString();
var sr = new StringReader(feedtext);
var ical = iCalendar.LoadFromStream(sr).First().Calendar;
all_ical.MergeWith(ical);
}
catch (Exception e)
{
GenUtils.LogMsg("warning", "MergeICS: " + url, e.Message);
}
}
var serializer = new DDay.iCal.Serialization.iCalendar.iCalendarSerializer(all_ical);
var icsbytes = Encoding.UTF8.GetBytes(serializer.SerializeToString(all_ical));
bs.PutBlob(id, id + ".ics", new Hashtable(), icsbytes, "text/calendar");
}
catch (Exception e)
{
GenUtils.LogMsg("exception", "MergeIcs: " + id, e.Message + e.StackTrace);
}
}
public override bool OnStart()
{
try
{
var hostname = System.Net.Dns.GetHostName();
var msg = "Worker: OnStart: " + hostname;
GenUtils.PriorityLogMsg("status", msg, null);
HttpUtils.Wait(startup_delay);
local_storage_path = RoleEnvironment.GetLocalResource("LocalStorage1").RootPath;
RoleEnvironment.Changing += RoleEnvironmentChanging;
GenUtils.LogMsg("status", "LocalStorage1", local_storage_path);
// PythonUtils.InstallPythonStandardLibrary(local_storage_path, ts);
HttpUtils.SetAllowUnsafeHeaderParsing(); //http://www.cookcomputing.com/blog/archives/000556.html
Utils.ScheduleTimer(IronPythonAdmin, minutes: CalendarAggregator.Configurator.ironpython_admin_interval_hours * 60, name: "IronPythonAdmin", startnow: false);
Utils.ScheduleTimer(GeneralAdmin, minutes: CalendarAggregator.Configurator.worker_general_admin_interval_hours * 60, name: "GeneralAdmin", startnow: false);
Utils.ScheduleTimer(TestRunnerAdmin, minutes: CalendarAggregator.Configurator.testrunner_interval_hours * 60, name: "TestRunnerAdmin", startnow: false);
Utils.ScheduleTimer(ReloadMonitorCounters, minutes: CalendarAggregator.Configurator.worker_reload_interval_hours * 60, name: "WorkerReloadCounters", startnow: false);
Utils.ScheduleTimer(MonitorAdmin, minutes: CalendarAggregator.Configurator.worker_gather_monitor_data_interval_minutes, name: "GatherMonitorData", startnow: false);
monitor = ElmcityUtils.Monitor.TryStartMonitor(CalendarAggregator.Configurator.process_monitor_interval_minutes, CalendarAggregator.Configurator.process_monitor_table);
}
catch (Exception e)
{
var msg = "Worker.OnStart";
GenUtils.PriorityLogMsg("exception", msg, e.Message + e.StackTrace);
}
return base.OnStart();
}
public HttpResponse SaveStatsToAzure()
{
var entity = new Dictionary <string, object>();
entity["PartitionKey"] = entity["RowKey"] = this.id;
var events_loaded = 0;
foreach (var feedurl in this.feeds.Keys)
{
if (this.stats.ContainsKey(feedurl))
{
var ical_stats = this.stats[feedurl];
events_loaded += ical_stats.loaded;
}
else
{
GenUtils.LogMsg("warning", "FeedRegistry.SaveStatsToAzure", "stats dict does not contain expected feedurl " + feedurl);
}
}
entity["ical_events"] = events_loaded;
return(this.ts.MergeEntity("metadata", this.id, this.id, entity).http_response);
}
private void MakeWhereAndWhatAndRegionIdLists()
{
this.where_ids = Metadata.LoadHubIdsFromAzureTableByType(HubType.where);
var where_ids_as_str = string.Join(",", this.where_ids.ToArray());
GenUtils.LogMsg("info", "where_ids: " + where_ids_as_str, null);
this.what_ids = Metadata.LoadHubIdsFromAzureTableByType(HubType.what);
var what_ids_as_str = string.Join(",", this.what_ids.ToArray());
GenUtils.LogMsg("info", "what_ids: " + what_ids_as_str, null);
this.region_ids = Metadata.LoadHubIdsFromAzureTableByType(HubType.region);
var region_ids_as_str = string.Join(",", this.region_ids.ToArray());
GenUtils.LogMsg("info", "region_ids: " + region_ids_as_str, null);
Dictionary <string, string> ids_and_locations = Metadata.QueryIdsAndLocations();
this.where_ids.Sort((a, b) => ids_and_locations[a].ToLower().CompareTo(ids_and_locations[b].ToLower()));
this.what_ids.Sort();
}
