Note: Running geotools 13.0.
I have an application that creates Point shapes. My application then writes these features in a shapefile and then into MySQL.
When I run the code under Windows, everything works perfect: the data is properly stored in MySQL and I can use it without any trouble.
When I run the code under Linux, shapefiles are created, but the data is not written in MySQL and the following exception is thrown:
WARNING: class org.geotools.filter.function.Collection_NearestFunction has name conflict betwee 'null' and 'Collection_Nearest'
Exception in thread "main" java.lang.NoSuchFieldError: LINEARIZATION_TOLERANCE
at org.geotools.jdbc.JDBCFeatureReader.init(JDBCFeatureReader.java:211)
at org.geotools.jdbc.JDBCFeatureReader.<init>(JDBCFeatureReader.java:137)
at org.geotools.jdbc.JDBCInsertFeatureWriter.<init>(JDBCInsertFeatureWriter.java:43)
at org.geotools.jdbc.JDBCFeatureStore.getWriterInternal(JDBCFeatureStore.java:280)
at org.geotools.data.store.ContentFeatureStore.getWriter(ContentFeatureStore.java:151)
at org.geotools.data.store.ContentFeatureStore.getWriter(ContentFeatureStore.java:122)
at org.geotools.data.store.ContentFeatureStore.getWriterAppend(ContentFeatureStore.java:263)
at org.geotools.data.store.ContentFeatureStore.addFeatures(ContentFeatureStore.java:242)
at com.technip.projects.gis.GISGenerator.writeShapesMySQL(GISGenerator.java:763)
at com.technip.projects.gis.GISGenerator.generatePlatforms(GISGenerator.java:416)
at com.technip.projects.gis.GISGenerator.createShapefiles(GISGenerator.java:249)
at Machine.run(Machine.java:739)
at Machine.main(Machine.java:329)
My code:
private void writeShapesMySQL(List<SimpleFeature> features) throws IOException {
SimpleFeatureType TYPE = null;
if (!features.isEmpty()) {
TYPE = features.get(0).getType();
// Drop the table if exists
try (Connection con = conf.requestConnection("gis")) {
con.prepareCall("DROP TABLE IF EXISTS " + TYPE.getTypeName() + ";").execute();
} catch (Exception e) {}
if (factory == null) {
initMySQLStore();
}
SimpleFeatureCollection collection = new ListFeatureCollection(TYPE, features);
gisDS.createSchema(TYPE);
Transaction transaction = new DefaultTransaction("create");
String typeName = null;
for (String s : gisDS.getTypeNames()) {
if (s.equalsIgnoreCase(TYPE.getTypeName())) {
typeName = s;
break;
}
}
if (typeName == null) {
log.error("Cannot find the type " + TYPE.getTypeName() + " in the known types: " + String.valueOf(gisDS.getTypeNames()));
throw new IOException("Cannot find type " + TYPE.getTypeName() + " -- in other words, developer sucks.");
}
SimpleFeatureSource featureSource = gisDS.getFeatureSource(typeName);
// System.out.println("SHAPE:"+SHAPE_TYPE);
if (featureSource instanceof SimpleFeatureStore) {
SimpleFeatureStore featureStore = (SimpleFeatureStore) featureSource;
featureStore.setTransaction(transaction);
try {
log.info("Adding " + collection.size() + " features into " + TYPE.getTypeName() + " table.");
featureStore.addFeatures(collection);
transaction.commit();
} catch (Exception problem) {
log.error("Cannot create shapes in MySQL for " + TYPE.getTypeName(), problem);
transaction.rollback();
} finally {
transaction.close();
}
}
} else {
log.warn("Passed empty list to create GIS database.");
}
}
private void initMySQLStore() throws IOException {
factory = new MySQLDataStoreFactory();
Map conMap = new HashMap();
conMap.put("dbtype", "mysql");
conMap.put("host", conf.getDbserver());
conMap.put("port", "3306");
conMap.put("database", "gis");
conMap.put("user", conf.getDbuser());
conMap.put("passwd", conf.getDbpass());
gisDS = factory.createDataStore(conMap);
Map<Class<?>, Integer> classMappings = gisDS.getClassToSqlTypeMappings();
classMappings.put(String.class, new Integer(Types.LONGVARCHAR));
}
My first hint is that MySQL is case sensitive in Linux, but not in Windows. So I checked the created tables both in Linux and Windows, and none of them has a field with such a name (LINEARIZATION_TOLERANCE).
Any hints?
Thanks,
Juan
--UPDATE: PROBLEM SOLVED--
It turned out I had an old .jar from a prior version of geotools in the Linux machine. Removing all old jars fixed the problem.
Problem solved:
It turned out I had an old .jar from a prior version of geotools in the Linux machine. Removing all old jars fixed the problem.
Dismiss this, it is a user error.
Related
Hi there I'm having issues with SQL updating player stats which makes very huge lag/timings drop I'm updating the stats on server stop this is my stats code:
public int getDeaths(Player p) {
if (!plugin.getConfig().getBoolean("mysql")) {
return plugin.data.getConfig().getInt("Deaths." + p.getUniqueId() + ".death");
}
if (plugin.getConfig().getBoolean("mysql")) {
int res = 0;
ResultSet result = getMainSQLConnection()
.executeQuery("SELECT * FROM `Account` WHERE playername='" + p.getName() + "'", false);
try {
if (result.next()) {
res = Integer.parseInt(result.getString("deaths"));
}
} catch (SQLException localSQLException) {
}
return res;
}
return 0;
}
public void setDeaths(Player p, int number) {
if (!plugin.getConfig().getBoolean("mysql")) {
plugin.data.getConfig().set("Deaths." + p.getUniqueId() + ".death", number);
plugin.data.save();
}
if (plugin.getConfig().getBoolean("mysql")) {
plugin.sqlConnection.executeUpdate(
"UPDATE `Account` SET deaths='" + number + "' WHERE playername='" + p.getName() + "'");
}
}
If you're getting the death count for a command or something that doesn't require the value to be returned immediately, use a asynchronous scheduler to run the code on a separate thread. For a command you'd do something like this when it is executed:
Bukkit.getScheduler().runTaskAsynchronously(plugin, () -> {
try {
int deaths = getMainSQLConnection()
.executeQuery("SELECT * FROM `Account` WHERE playername='" + p.getName() + "'", false)
.getInt("deaths");
player.sendMessage("Player Deaths: " + deaths);
} catch (SQLException ex) {
player.sendMessage(ChatColor.RED + "That player does not exist!");
}
});
Otherwise, if you need the value in the code for whatever reason, you can use a connection pool such as HikariCP. A connection pool will allow you to maintain multiple connections to your database so when you need to execute a query you don't have to establish a new connection every time (which is what will cause most of the lag).
Better yet, use an asynchronous task in tandem with the connection pool. Here's a good tutorial for learning how to use HikariCP with Bukkit: https://www.spigotmc.org/threads/tutorial-implement-mysql-in-your-plugin-with-pooling.61678
As a side note, for basically zero performance impact on the server, you can load the data asynchronously when a player logs in (using the AsyncPlayerPreLoginEvent). Then store it in memory when they actually join the server (PlayerLoginEvent or PlayerJoinEvent), and remove it when they quit. This way you access the data through memory while they're logged in rather than the database. This is much more complicated and also requires a lot of code to implement correctly though, so I'm not going to go into detail here.
I have been understanding this example for Xamarin cross-platform mobile development:
https://msdn.microsoft.com/en-us/library/dn879698.aspx
I made an error by copying two times the the API key in the code:
using System;
using System.Threading.Tasks;
namespace XWeatherApp
{
public class Core
{
public static async Task<Weather> GetWeather(string zipCode)
{
//Sign up for a free API key at http://openweathermap.org/appid
string key = "40aabb59f41e9e88db7be4bab11f49f8";
string queryString = "http://api.openweathermap.org/data/2.5/weather?zip="
+ zipCode + ",us&appid=" + key + "&units=imperial";
//Make sure developers running this sample replaced the API key
if (key == "40aabb59f41e9e88db7be4bab11f49f8")
{
throw new ArgumentException("You must obtain an API key from openweathermap.org/appid and save it in the 'key' variable.");
}
dynamic results = await DataService.getDataFromService(queryString).ConfigureAwait(true);
if (results["weather"] != null)
{
Weather weather = new Weather();
weather.Title = (string)results["name"];
weather.Temperature = (string)results["main"]["temp"] + " F";
weather.Wind = (string)results["wind"]["speed"] + " mph";
weather.Humidity = (string)results["main"]["humidity"] + " %";
weather.Visibility = (string)results["weather"][0]["main"];
DateTime time = new System.DateTime(1970, 1, 1, 0, 0, 0, 0);
DateTime sunrise = time.AddSeconds((double)results["sys"]["sunrise"]);
DateTime sunset = time.AddSeconds((double)results["sys"]["sunset"]);
weather.Sunrise = sunrise.ToString() + " UTC";
weather.Sunset = sunset.ToString() + " UTC";
return weather;
}
else
{
return null;
}
}
}
}
Specifically, in the lines after the two comments.
I deployed the app to a physical Android phone. Obviously I got an exception (this was not so obvious after some minutes looking for the failing code).
That exception wasn't displayed in the Output window (in Visual Studio 2017). I just only got this message on screen:
Why don't the custom message for the exception (i.e., You must obtain an API key from openweathermap.org/appid and save it in the 'key' variable.).
Have you tried to use a try/catch?
something like
try{
await GetWeather(string zipCode);
}
catch(Exception ex) {
// here you should have your exception
}
I am uploading documents to Google Drive successfully but my meta-data does not appear to be getting back to me correctly.
protected File insertFile(Drive service, List<String> parentIds, com.google.drive.FileContent fileContent, File googleFile)throws IOException {
// Set the parent folder.
if (parentIds != null && parentIds.size() > 0) {
List<ParentReference> parentReferences = new ArrayList<ParentReference>();
for (String parentId : parentIds ){
parentReferences.add(new ParentReference().setId(parentId));
}
googleFile.setParents( parentReferences );
}
try {
googleFile = service.files().insert(googleFile, fileContent).execute();
// Uncomment the following line to print the File ID.
System.out.println("File ID: " + googleFile.getId());
return googleFile;
}
catch (IOException e) {
System.out.println("An error occured: " + e);
return null;
}
}
Above is my insert statement, below is what I am sending as details about the document.
{description=XXXXXXX Invoice, fileExtension=pdf,
indexableText={text=XXXXXXX Invoice}, labels={restricted=false},
mimeType=application/pdf, parents=[{id=0B_owsnWRsIy7S1VsWG1vNTYzM1k}],
properties=[{key=DocumentType, value=11}], title=XXXXXXX Invoice}
When I do a get for that same document using this code
protected InputStream downloadFile(Drive service, File file)throws IOException {
if (file.getDownloadUrl() != null && file.getDownloadUrl().length() > 0) {
HttpResponse resp =
service.getRequestFactory().buildGetRequest(new GenericUrl(file.getDownloadUrl()))
.execute();
return resp.getContent();
}
else {
// The file doesn't have any content stored on Drive.
return null;
}
}
I get most of the text back minus the indexable Text and File Extension, is that correct (Do not want to show since it contains a lot of information that is noise)?
Two separate issues here.
1) fileExtension is a read-only field so it is being ignored. When retrieving the information, it is derived from the original title/filename. Since your title doesn't include ".pdf" it is being set to empty.
2) indexableText is write-only in we don't allow you to retrieve it once set; it is only used by the drive backend to service search queries.
You can read more on the different metadata properties of the file resource in our documentation.
I get an Unhandled Exception: System.NotSupportedException: Operation is not supported. The Exception is raised under Mono using Ubuntu 11.10.
Reading the property works. The docs could suggest that the Method does not pose issues.
Any ideas on how to best handle or fix this situation?
My current solution is rather awkward, and does not solve the issue of setting the Window Size through the System.Console-API:
const int defaultConsoleWindowWidth = 80;
const int defaultConsoleWindowHeight = 25;
if (pid != PlatformID.Unix && pid != (PlatformID)128) {
System.Console.WindowHeight = lastConsoleWindowHeight;
System.Console.WindowWidth = defaultConsoleWindowWidth;
}else{
//assume *NIX system
try {
var p = new Process();
p.StartInfo = new ProcessStartInfo(#"stty cols " + defaultConsoleWindowWidth + " rows " + lastConsoleWindowHeight, "-n")
{
UseShellExecute = false
};
p.Start();
p.WaitForExit();
}
catch (Exception e) { /*...*/}
}
My Mono version:
lo#lo-VirtualBox:~/Desktop$ mono --version
Mono JIT compiler version 2.10.8.1 (Debian 2.10.8.1-1ubuntu2.2)
Copyright (C) 2002-2011 Novell, Inc, Xamarin, Inc and Contributors. www.mono-project.com
TLS: __thread
SIGSEGV: altstack
Notifications: epoll
Architecture: x86
Disabled: none
Misc: softdebug
LLVM: supported, not enabled.
GC: Included Boehm (with typed GC and Parallel Mark)
From the master branch on mono on Github Console.cs:
[MonoLimitation ("Only works on windows")]
public static int WindowHeight {
get { return ConsoleDriver.WindowHeight; }
set { ConsoleDriver.WindowHeight = value; }
}
Notice the MonoLimitation attribute
Below code throws net.rim.device.api.io.file.FileIOException: File system out of resources this exception.
Can anyone tell me how it happens?
public Bitmap loadIconFromSDcard(int index) {
FileConnection fcon = null;
Bitmap icon = null;
InputStream is=null;
try {
fcon = (FileConnection) Connector.open(Shikshapatri.filepath + "i"
+ index + ".jpg", Connector.READ);
if (fcon.exists()) {
byte[] content = new byte[(int) fcon.fileSize()];
int readOffset = 0;
int readBytes = 0;
int bytesToRead = content.length - readOffset;
is = fcon.openInputStream();
while (bytesToRead > 0) {
readBytes = is.read(content, readOffset, bytesToRead);
if (readBytes < 0) {
break;
}
readOffset += readBytes;
bytesToRead -= readBytes;
}
EncodedImage image = EncodedImage.createEncodedImage(content,
0, content.length);
image = resizeImage(image, 360, 450);
icon = image.getBitmap();
}
} catch (Exception e) {
System.out.println("Error:" + e.toString());
} finally {
// Close the connections
try {
if (fcon != null)
fcon.close();
} catch (Exception e) {
}
try {
if (is != null)
is.close();
is = null;
} catch (Exception e) {
}
}
return icon;
}
Thanks in advance...
Check this BB dev forum post - http://supportforums.blackberry.com/t5/Java-Development/File-System-Out-of-Resources/m-p/105597#M11927
Basically you should guaranteedly close all connections/streams as soon as you don't need them, because there is a limited number of connection (be it a file connection or http connection) handles in OS. If you execute several loadIconFromSDcard() calls at the same time (from different threads) consider redesign the code to call them sequentially.
UPDATE:
To avoid errors while reading the content just use the following:
byte[] content = IOUtilities.streamToBytes(is);
And since you don't need file connection and input stream any longer just close them right after reading the content (before creating EncodedImage):
is.close();
is = null; // let the finally block know there is no need to try closing it
fcon.close();
fcon = null; // let the finally block know there is no need to try closing it
Minor points:
Also in the finally block it is worth set fcon = null; explicitly after you close it, I believe this can help old JVMs (BB uses Java 1.3 - rather old one) to decide quicker that the object is ready to be garbage collected.
I also believe that the order you close streams in the finally block may be important - I'd change to close is first and then fcon.