I have following problem: I copy file or folder to system clipboard. It realy simple, here the code:
import javafx.scene.input.Clipboard;
import javafx.scene.input.ClipboardContent;
import java.nio.file.Path;
#Override
public void copyHandler(Path path) {
ClipboardContent content = new ClipboardContent();
content.putFiles(singletonList(path.toFile()));
Clipboard clipboard = Clipboard.getSystemClipboard();
clipboard.setContent(content);
}
But after success copy, I go to my OS(Ubuntu 16.04) filesystem explorer, click right mouse and try to paste, but paste menu is disabled. What is wrong with my approach?
Here the specific solution for Ubuntu Nautilus File-Manager:
public static final DataFormat GNOME_FILES = new DataFormat("x-special/gnome-copied-files");
if (platform == Platform.Linux64 || platform == Platform.Linux32) {
final StringBuilder builder = new StringBuilder("copy\n");
paths.forEach(builder, (path, b) ->
b.append(path.toUri().toASCIIString()).append('\n'));
builder.delete(builder.length() - 1, builder.length());
final ByteBuffer buffer = ByteBuffer.allocate(builder.length());
for (int i = 0, length = builder.length(); i < length; i++) {
buffer.put((byte) builder.charAt(i));
}
buffer.flip();
content.put(GNOME_FILES, buffer);
}
Related
I would like to save a file in a user selected folder, thats why I would like to provide a directory list to user and user will be able to choose the directory where he wants to export the data. Unfortuntely I could not find any example for directory/folder picker, I just found a file picker which is not useful for me..
https://github.com/jfversluis/FilePicker-Plugin-for-Xamarin-and-Windows
Is there any component for picking a folder for Xamarin.Forms? Actually I am just doing for Android but we use Xamarin.forms
There is none I can think of.
With netstandard everything is way more simple as you can use the classic c# File api to get the folders.
You just have to know the mappings between special folders and android folders (per example):
System.Environment.SpecialFolder Path
ApplicationData INTERNAL_STORAGE/.config
Desktop INTERNAL_STORAGE/Desktop
LocalApplicationData INTERNAL_STORAGE/.local/share
MyDocuments INTERNAL_STORAGE
MyMusic INTERNAL_STORAGE/Music
MyPictures INTERNAL_STORAGE/Pictures
MyVideos INTERNAL_STORAGE/Videos
Personal INTERNAL_STORAGE
source: https://learn.microsoft.com/en-US/xamarin/android/platform/files/
same for ios:
https://learn.microsoft.com/en-US/xamarin/ios/app-fundamentals/file-system
But it's really easy to implement, just enumerate all folders and display them in a ListView.
EDIT: more details on implementation.
In fact you want to code a "directory explorer", it's easy, here is the concept.
You have a ListView in your Page
You have a Cancel button and a Select button in your Page
You have a CurrentPath in your ViewModel
You bind CurrentPath to the Title of your Page
You have an List<DirectoryViewModel> Directories in your ViewModel
Each time a user click on a item from the list:
You add the directory name in your current path
You get all the directories from the new path, and update your Directories property (don't forget RaisePropertyChange(nameof(Directories)))
The ListView will be updated accordingly
Each time you back:
You remove last part of your current path
same as before
If you arrive to root path "/", you do nothing when clicking on back.
Oh and you could use this Grid component to instead of the ListView, will be nicer ;)
https://github.com/roubachof/Sharpnado.Presentation.Forms#grid-Layout
You can edit this to make it work..
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Java.IO;
using Java.Util;
namespace Android.Basic.IO
{
public class DirectoryPicker : ListActivity
{
public const String START_DIR = "startDir";
public const String ONLY_DIRS = "onlyDirs";
public const String SHOW_HIDDEN = "showHidden";
public const String CHOSEN_DIRECTORY = "chosenDir";
public const int PICK_DIRECTORY = 43522;
private File dir;
private Boolean showHidden = false;
private bool onlyDirs = true;
public override void OnCreate(Bundle savedInstanceState, PersistableBundle persistentState)
{
base.OnCreate(savedInstanceState, persistentState);
Bundle extras = Intent.Extras;
dir = OS.Environment.ExternalStorageDirectory;
if (extras != null)
{
String preferredStartDir = extras.GetString(START_DIR);
showHidden = extras.GetBoolean(SHOW_HIDDEN, false);
onlyDirs = extras.GetBoolean(ONLY_DIRS, true);
if (preferredStartDir != null)
{
File startDir = new File(preferredStartDir);
if (startDir.IsDirectory)
{
dir = startDir;
}
}
}
SetContentView(Resource.Layout.folder_chooser_activity);
var title = dir.AbsolutePath.ToString();
Title = (title);
Button btnChoose = (Button)FindViewById(Resource.Id.btnChoose);
String name = dir.Name;
if (name.Length == 0)
name = "/";
btnChoose.Text = ("Choose " + "'" + name + "'");
btnChoose.Click += delegate
{
returnDir(dir.AbsolutePath);
};
ListView lv = this.ListView;
lv.TextFilterEnabled = (true);
if (!dir.CanRead())
{
Context context = ApplicationContext;
String msg = "Could not read folder contents.";
Toast.MakeText(context, msg, ToastLength.Long).Show();
return;
}
var files = filter(dir.ListFiles(), onlyDirs, showHidden);
String[] names = Names(files);
ListAdapter = (new ArrayAdapter<String>(this, Resource.Layout.folder_chooser_item, names));
lv.ItemClick += (ff, gg) =>
{
var position = gg.Position;
if (!files[gg.Position].IsDirectory)
return;
String path = files[position].AbsolutePath;
var intent = new Intent(this, typeof(DirectoryPicker));
intent.PutExtra(DirectoryPicker.START_DIR, path);
intent.PutExtra(DirectoryPicker.SHOW_HIDDEN, showHidden);
intent.PutExtra(DirectoryPicker.ONLY_DIRS, onlyDirs);
StartActivityForResult(intent, PICK_DIRECTORY);
};
}
protected void OnActivityResult(int requestCode, int resultCode, Intent data)
{
if (requestCode == PICK_DIRECTORY && resultCode == (int)Result.Ok)
{
Bundle extras = data.Extras;
String path = (String)extras.Get(DirectoryPicker.CHOSEN_DIRECTORY);
returnDir(path);
}
}
private void returnDir(String path)
{
Intent result = new Intent();
result.PutExtra(CHOSEN_DIRECTORY, path);
SetResult(Result.Ok, result);
Finish();
}
public List<File> filter(File[] file_list, bool onlyDirs, bool showHidden)
{
var files = new List<File>();
foreach (var file in file_list)
{
if (onlyDirs && !file.IsDirectory)
continue;
if (!showHidden && file.IsHidden)
continue;
files.Add(file);
}
Collections.Sort(files);
return files;
}
public String[] Names(List<File> files)
{
String[] names = new String[files.Count];
int i = 0;
foreach (var file in files)
{
names[i] = file.Name;
i++;
}
return names;
}
}
}
Start activity as result then catch in OnActivityResult
if (requestCode == DirectoryPicker.PICK_DIRECTORY && resultCode == Result.Ok)
{
Bundle extras = data.Extras;
String path = (String)extras.Get(DirectoryPicker.CHOSEN_DIRECTORY);
// do stuff with path
}
I have an application written in JavaFX to control some lights in a theater with a very simple interface. Basically two buttons, one to fade lights up over 3 seconds and the other to fade them down over 3 seconds. The app connects to an Ethernet to Serial Server (Sealevel Sealink 4104) to control the lights.
I would like to add a browser interface so that the app can be controlled via any mobile device. I have added a Java web server based on code I got from this video.
https://www.youtube.com/watch?v=G4Z2PQfOHdY
The app runs, and I can get the web page I am looking for in the browser. However, my app interface never shows up. The idea is that the app interface is always present to indicate that it is running. The web page interface would be available to extend the control options to a mobile device.
The main question at this point is how do I get the web server to run in the background without interfering with the functioning of the app interface?
The web server code:
package lightcontrol2;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.StringTokenizer;
public final class JavaWebserver {
public final void StartServer() throws Exception {
// Set port number.
int port = 9000;
// Establish the listening socket.
ServerSocket serverSocket = new ServerSocket(port);
// Process HTTP sevice requests in an infinite loop.
while (true) {
// Listen for TCP connection request.
Socket connectionSocket = serverSocket.accept();
// Construct an object to process the HTTP request message.
HttpRequest request = new HttpRequest(connectionSocket);
// Create a new thread to process the request.
Thread thread = new Thread(request);
// Start the thread.
thread.start();
}
}
}
final class HttpRequest implements Runnable {
// Return carriage return (CR) and line feed (LF).
final static String CRLF = "\r\n";
Socket socket;
// Constructor.
public HttpRequest(Socket socket) throws Exception {
this.socket = socket;
}
// Implement the run() method of the Runnable interface.
// Within run(), explicitly catch and handle exceptions
// with try/ catch block.
#Override
public void run() {
try {
processRequest();
} catch (Exception e){
System.out.println(e);
}
}
private void processRequest() throws Exception {
// Get a reference to the socket's input and output streams.
InputStream instream = socket.getInputStream();
DataOutputStream os = new DataOutputStream(socket.getOutputStream());
// Set up input stream filters.
// Page 169, 10th line down or so . . .
// Reads the input data.
BufferedReader br = new BufferedReader(new InputStreamReader(instream));
// Get the request line of the HTTP request message.
// Get path/file.html version of http
String requestLine = br.readLine();
// Display the request line.
System.out.println();
System.out.println(requestLine);
// Deal with the request.
// Extract the filename from the request line.
// This is an input method with deliminators.
StringTokenizer tokens = new StringTokenizer(requestLine);
// Skip over the method, which should be 'GET'.
tokens.nextToken();
String fileName = tokens.nextToken();
// Root of the server.
String root = "/www/";
fileName = root + fileName;
// Open the requested file.
FileInputStream fis = null;
boolean fileExists = true;
try {
fis = new FileInputStream(fileName);
} catch (FileNotFoundException e) {
fileExists = false;
}
// Construct the response message.
String statusLine = null;
String contentTypeLine = null;
String entityBody = null;
if (fileExists) {
statusLine = "HTTP/1.0 200 OK" + CRLF;
contentTypeLine = "Content-type: " + contentType(fileName) + CRLF;
}
else {
statusLine = "HTTP/1.0 404 Not Found" + CRLF;
contentTypeLine = "Content-type: " + "text/html" + CRLF;
entityBody = "<HTML>" +
"<HEAD><TITLE>Not Found</TITLE></HEAD>" +
"<BODY>NOt Found</BODY></HTML>";
}
//Send the status line.
os.writeBytes(statusLine);
// Sent the content type line.
os.writeBytes(contentTypeLine);
// Send a blank line to indicate the end of the header lines.
os.writeBytes(CRLF);
// Send the entity body.
if (fileExists) {
sendBytes(fis, os);
os.writeBytes(statusLine);
fis.close();
} else {
os.writeBytes(statusLine);
os.writeBytes(entityBody);
os.writeBytes(contentTypeLine);
}
System.out.println("*****");
System.out.println(fileName);
System.out.println("*****");
// Get and display the header lines.
String headerLine = null;
while ((headerLine = br.readLine()).length() != 0) {
System.out.println(headerLine);
}
// Close streams and socket.
os.close();
br.close();
socket.close();
}
private static String contentType(String fileName) {
if (fileName.endsWith(".htm") || fileName.endsWith(".html")) {
return "text/html";
}
if (fileName.endsWith(".jpg") || fileName.endsWith(".jpeg")) {
return "image/jpeg";
}
if (fileName.endsWith(".gif")) {
return "image/gif";
}
return "application/octet-stream";
}
private static void sendBytes(FileInputStream fis, OutputStream os) throws Exception {
// Construct 1K buffer to hold bytes on way to the socket.
byte[] buffer = new byte[1024];
int bytes = 0;
// Copy requested file into the socket's output stream.
// read() returns -1, indicating end of file.
while ((bytes = fis.read(buffer)) != -1) {
os.write(buffer, 0, bytes);
}
}
}
Here is the interface code:
package lightcontrol2;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;
public class LightControl2 extends Application {
#Override
public void start(Stage primaryStage) throws Exception {
GridPane grid = createGrid();
SealinkConnect connect = new SealinkConnect();
JavaWebserver webserver = new JavaWebserver();
Button btnOn = new Button();
grid.add(btnOn, 0, 1);
btnOn.setText("3 Sec On");
btnOn.setOnAction((ActionEvent event) -> {
System.out.println("3N:100:A");
connect.sendCommand("3N:100:A");
});
Button btnOff = new Button();
grid.add(btnOff, 0, 2);
btnOff.setText("3 Sec Off");
btnOff.setOnAction((ActionEvent event) -> {
System.out.println("3F:A");
connect.sendCommand("3F:A");
});
BorderPane root = new BorderPane();
root.setPadding(new Insets(10));
root.setCenter(grid);
Scene scene = new Scene(root, 365, 300);
primaryStage.setTitle("Light Control Test");
primaryStage.setScene(scene);
scene.getStylesheets().add
(LightControl2.class.getResource("style.css").toExternalForm());
primaryStage.show();
connect.socketConnect();
webserver.StartServer();
}
private GridPane createGrid() {
GridPane grid = new GridPane();
grid.setAlignment(Pos.CENTER);
grid.setHgap(5);
grid.setVgap(10);
grid.setPadding(new Insets(10));
return grid;
}
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
I'm going to guess that JavaFX needs its thread back. It invokes start(), in which you call webserver.StartServer(), which in turns remains stuck in an infinite while(true) loop. You should do the socket accepting loop in a separate thread as well (and shut it down properly as needed) and let the start method return.
That being said, I would not recommend trying to implement a pseudo-HTTP-server on your own - that's just extra code, work and maintenance and might break in various ways if it is not RFC-compliant. There are plenty of embeddable lightweight HTTP servers you can use. As the author of JLHTTP, I think it could be a good match for your use case, but there are many others to choose from.
Using JLHTTP 2.1, you'd need something like this:
public void startWebServer() {
String dir = "."; // local folder to serve website files from
HTTPServer server = new HTTPServer(9000); // pick a port, any port
HTTPServer.VirtualHost host = server.getVirtualHost(null); // default virtual host
host.addContext("/", new FileContextHandler(new File(dir), "/")); // serve website files from disk directory
host.addContext("/api/lights", (request, response) -> {
Map<String, String> params = request.getParams();
String action = params.get("action");
if (action == null)
action = "";
switch (action) {
case "on":
connect.sendCommand("3N:100:A");
return 200; // ok
case "off":
connect.sendCommand("3F:A");
return 200; // ok
default:
return 400; // bad request
}
}, "GET", "POST"); // support both GET and POST requests
server.start();
}
Notes:
The website files (html/js/css/imags etc.) are served from disk - the example uses the current directory, but you should change that to a dedicated directory to prevent unintended access to sensitive files.
Your client code can use either a POST or GET request, via a form, AJAX, url with query parameters, etc., as long as it sends the appropriate action parameter and value.
You should also properly close the application, connection, HTTPServer etc.
This example accepts a single on/off action parameter. If you need more flexibility on the client side, you can pass individual command/device/value parameters and create the light controller command string in the context handler.
After you get everything working, you should consider security as well, or some kid in the audience will start messing with your show :-)
I am trying to connect an SQLite database file to a picker component (accepting strings). This should act similar to a drop-down menu. I have tried to follow previous advice and examples, but without success.
As indicated in a previous post, I have saved the database file in the source folder of the application. View of the source folder where I have saved the database file (highlighted).
The code I have used to implement my app is as follows with the below layout.
//-----------------------
database code
//-----------------------
public class MyApplication {
private Form current;
private Resources theme;
public void init(Object context) {
theme = UIManager.initFirstTheme("/theme");
// Pro only feature, uncomment if you have a pro subscription
// Log.bindCrashProtection(true);
}
private Container Home() {
Container home = new Container(new BoxLayout(BoxLayout.Y_AXIS));
return home;
}
private Container AddItem() {
Container addItem = new Container(new BoxLayout(BoxLayout.Y_AXIS));
TextArea item = new TextArea("Add Item");
addItem.addComponent(item);
Picker selectItem = new Picker();
selectItem.setType(Display.PICKER_TYPE_STRINGS);
//----------------------------------------------------------------------------------
Database db = null;
Cursor cur = null;
try {
db = Display.getInstance().openOrCreate("FoodAndBeverage.db");
if(selectItem.getText().startsWith("Still Water")) {
cur = db.executeQuery(selectItem.getText());
int columns = cur.getColumnCount();
addItem.removeAll();
if(columns > 0) {
boolean next = cur.next();
if(next) {
ArrayList<String[]> data = new ArrayList<>();
String[] columnNames = new String[columns];
for(int iter = 0 ; iter < columns ; iter++) {
columnNames[iter] = cur.getColumnName(iter);
}
while(next) {
Row currentRow = cur.getRow();
String[] currentRowArray = new String[columns];
for(int iter = 0 ; iter < columns ; iter++) {
currentRowArray[iter] = currentRow.getString(iter);
}
data.add(currentRowArray);
next = cur.next();
}
Object[][] arr = new Object[data.size()][];
data.toArray(arr);
addItem.add(BorderLayout.CENTER, new Table(new DefaultTableModel(columnNames, arr)));
} else {
addItem.add(BorderLayout.CENTER, "Query returned no results");
}
} else {
addItem.add(BorderLayout.CENTER, "Query returned no results");
}
} else {
db.execute(selectItem.getText());
addItem.add(BorderLayout.CENTER, "Query completed successfully");
}
addItem.revalidate();
} catch(IOException err) {
Log.e(err);
addItem.removeAll();
addItem.add(BorderLayout.CENTER, "Error: " + err);
addItem.revalidate();
} finally {
Util.cleanup(db);
Util.cleanup(cur);
}
//---------------------------------------------------------------------------------------------
addItem.addComponent(selectItem);
TextField quantity = new TextField("", "Quantity (ml or g)", 4, TextArea.NUMERIC);
addItem.addComponent(quantity);
Button add = new Button("Add");
addItem.addComponent(add);
TextArea results = new TextArea("Results");
addItem.addComponent(results);
return addItem;
}
private Container Settings() {
Container settings = new Container(new BoxLayout(BoxLayout.Y_AXIS));
TextArea nutrients = new TextArea("Target");
settings.addComponent(nutrients);
TextField volume = new TextField("", "Volume (ml)", 4, TextArea.NUMERIC);
settings.addComponent(volume);
TextArea duration = new TextArea("Hydration Duration");
settings.addComponent(duration);
settings.add("Start:");
Picker start = new Picker();
start.setType(Display.PICKER_TYPE_TIME);
settings.addComponent(start);
settings.add("End:");
Picker end = new Picker();
end.setType(Display.PICKER_TYPE_TIME);
settings.addComponent(end);
Button save = new Button("Save");
settings.addComponent(save);
return settings;
}
public void start() {
if(current != null)
{
current.show();
return;
}
Form home = new Form("Hydrate", new BorderLayout());
Tabs t = new Tabs();
t.addTab("Home", Home());
t.addTab("Intake", AddItem());
t.addTab("Settings", Settings());
home.add(BorderLayout.NORTH, t);
home.show();
}
public void stop() {
current = Display.getInstance().getCurrent();
}
public void destroy() {
}
}
I would therefore appreciate any advice and guidance on exactly where I am going wrong and how to implement the suggested changes in my code.
I'm assuming the file under src does indeed end with the extension db as the Windows hidden extensions nonsense is turned on.
This code will NOT open a db placed in src:
db = Display.getInstance().openOrCreate("FoodAndBeverage.db");
You need to do something like this to implicitly initialize the DB the first time the app is installed:
String path = Display.getInstance().getDatabasePath("FoodAndBeverage.db");
FileSystemStorage fs = FileSystemStorage.getInstance();
if(!fs.exists(path)) {
try (InputStream is = Display.getInstance().getResourceAsStream(getClass(), "/FoodAndBeverage.db");
OutputStream os = fs.openOutputStream(path)) {
Util.copy(is, os);
} catch(IOException err) {
Log.e(err);
}
}
db = Display.getInstance().openOrCreate("FoodAndBeverage.db");
Notice that the code above doesn't check for updates of the DB so assuming the DB is read only you might want to update/merge it with app updates.
The above code doesn't work on Android device, this works only on simulator. I have tested multiple times in the android device. In the real android device ,the database is not loaded at all, shows sql exception error
"No such table sql exception".
Looks like preloaded sqlite .db file is never tested on real Android device.
We're developing a system that we're basing on OrientDB graphs (OrientDB 2.1.3). In the application, we have a thin pojo->graph persistence layer that should do the work properly, but I get OConcurrentModificationException when having multiple threads updating the database.
Here's an example scenario:
Create a Product vertex with edge to Color "Blue"
Simultaneously (while the transaction for creating Product 1 is open) create another Product vertex is created and also adds an edge to Color "Blue".
OConcurrentModificationException is thrown since the version of Color "Blue" vertex is updated. Note that I'm not trying to save or modify the Color "Blue" vertex itself.
As I understood the docs at http://orientdb.com/docs/2.1/Concurrency.html#concurrency-on-adding-edges setting -DridBag.embeddedToSbtreeBonsaiThreshold=-1 should help me avoid my problem, although it still doesn't work.
What am I missing? Is there anything else I can do to avoid this?
Update:
Stacktrace of the exception:
Error on releasing database 'infogileorientdatabasetest' in pool
com.orientechnologies.orient.core.exception.OConcurrentModificationException: Cannot UPDATE the record #40:1 because the version is not the latest. Probably you are updating an old record or it has been modified by another user (db=v34 your=v33)
at com.orientechnologies.orient.core.conflict.OVersionRecordConflictStrategy.checkVersions(OVersionRecordConflictStrategy.java:55)
at com.orientechnologies.orient.core.conflict.OVersionRecordConflictStrategy.onUpdate(OVersionRecordConflictStrategy.java:42)
at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.checkAndIncrementVersion(OAbstractPaginatedStorage.java:2279)
at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.doUpdateRecord(OAbstractPaginatedStorage.java:1911)
at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.commitEntry(OAbstractPaginatedStorage.java:2364)
at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.commit(OAbstractPaginatedStorage.java:1111)
at com.orientechnologies.orient.core.tx.OTransactionOptimistic.doCommit(OTransactionOptimistic.java:609)
at com.orientechnologies.orient.core.tx.OTransactionOptimistic.commit(OTransactionOptimistic.java:156)
at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.commit(ODatabaseDocumentTx.java:2582)
at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.commit(ODatabaseDocumentTx.java:2551)
at com.orientechnologies.orient.server.network.protocol.binary.ONetworkProtocolBinary.commit(ONetworkProtocolBinary.java:1221)
at com.orientechnologies.orient.server.network.protocol.binary.ONetworkProtocolBinary.executeRequest(ONetworkProtocolBinary.java:400)
at com.orientechnologies.orient.server.network.protocol.binary.OBinaryNetworkProtocolAbstract.execute(OBinaryNetworkProtocolAbstract.java:223)
at com.orientechnologies.common.thread.OSoftThread.run(OSoftThread.java:77)
Update 2 - test case
I have reproduced the error using this test case. I would be delighted if there's something else I've done wrong to cause the problem... :-)
Update 3 Updated test case with OGlobalConfiguration.RID_BAG_EMBEDDED_TO_SBTREEBONSAI_THRESHOLD.setValue(-1) in a static block.
package se.infogile.persistence.orientdb;
import com.orientechnologies.orient.client.remote.OServerAdmin;
import com.orientechnologies.orient.core.config.OGlobalConfiguration;
import com.orientechnologies.orient.core.db.OPartitionedDatabasePool;
import com.orientechnologies.orient.core.db.OPartitionedDatabasePoolFactory;
import com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx;
import com.orientechnologies.orient.core.exception.OConcurrentModificationException;
import com.orientechnologies.orient.core.exception.OConfigurationException;
import com.orientechnologies.orient.core.exception.OStorageException;
import com.orientechnologies.orient.core.tx.OTransaction;
import com.orientechnologies.orient.enterprise.channel.binary.OResponseProcessingException;
import com.orientechnologies.orient.server.OServer;
import com.orientechnologies.orient.server.OServerMain;
import com.orientechnologies.orient.server.config.OServerConfiguration;
import com.orientechnologies.orient.server.config.OServerConfigurationLoaderXml;
import com.orientechnologies.orient.server.config.OServerNetworkListenerConfiguration;
import com.tinkerpop.blueprints.Vertex;
import com.tinkerpop.blueprints.impls.orient.OrientGraph;
import org.apache.commons.io.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.testng.Assert;
import org.testng.annotations.AfterSuite;
import org.testng.annotations.BeforeSuite;
import org.testng.annotations.Test;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.*;
/**
* Created by heintz on 14/10/15.
*/
public class OrientDBEdgeProblemTest {
static {
OGlobalConfiguration.RID_BAG_EMBEDDED_TO_SBTREEBONSAI_THRESHOLD.setValue(-1);
}
private static OPartitionedDatabasePoolFactory dbPoolFactory = new OPartitionedDatabasePoolFactory(100);
private static Logger logger = LoggerFactory.getLogger(OrientDBEdgeProblemTest.class);
private OServer server = null;
private static ExecutorService executorService = Executors.newFixedThreadPool(10);
private static final String dbName = "edgeproblemtest";
#Test
public void testVersionIncrementError() throws Throwable {
OrientGraph graph = getGraph(dbName);
graph.getRawGraph().setDefaultTransactionMode();
graph.createVertexType("Product");
graph.createVertexType("Color");
graph.createEdgeType("HasColor");
graph.getRawGraph().begin(OTransaction.TXTYPE.OPTIMISTIC);
// graph.begin();
Vertex v1 = graph.addVertex("Color", "name", "Blue");
graph.commit();
graph.shutdown();
char[] alphabet = new char[] {'A','B','C','D','E','F','G'};
List<Future> futures = new ArrayList<>();
for (int i = 0; i < 2; i++) {
int pos = i;
futures.add(executorService.submit(new Callable<Object>() {
#Override
public Object call() throws Exception {
OrientGraph g = getGraph(dbName);
try {
g.begin();
Vertex v2 = g.addVertex("Product", "name", "Product "+alphabet[pos]);
g.addEdge(null, v2, v1, "HasColor");
Thread.sleep(200);
g.commit();
} catch (OConcurrentModificationException ocme) {
logger.error("Exception while saving: ", ocme);
Assert.fail("OConcurrentModificationException");
} finally {
g.shutdown();
}
return null;
}
}));
}
for (Future f : futures) {
f.get();
}
executorService.shutdown();
executorService.awaitTermination(5, TimeUnit.SECONDS);
}
#AfterSuite
public void tearDown() throws Exception {
logger.info("Shutting down OrientDB");
if (server != null) {
server.shutdown();
}
}
private OrientGraph getGraph(String dbName) {
String _db = "remote:localhost:3424";
String url = _db + "/" + dbName;
ODatabaseDocumentTx db = null;
try {
OPartitionedDatabasePool pool = dbPoolFactory.get(url,
"root",
"admin");
db = pool.acquire();
} catch (OResponseProcessingException | OConfigurationException | OStorageException oce) {
try {
logger.info("creating new database named " + dbName);
System.err.println("Before DB creation");
OServerAdmin serverAdmin = new OServerAdmin(_db).connect(
"root",
"admin"
);
serverAdmin.createDatabase(dbName, "document", "plocal");
serverAdmin.close();
System.err.println("After DB creation");
} catch (IOException ex) {
logger.error("Unable to create database " + dbName, ex);
}
OPartitionedDatabasePool pool = dbPoolFactory.get(url,
"root",
"admin");
db = pool.acquire();
}
return new OrientGraph(db);
}
#BeforeSuite
public void setUpDatabase() throws Exception {
File f = new File(".");
InputStream is = GraphPersistenceServiceTest.class.getResourceAsStream("/orientdb.config");
Assert.assertNotNull(is);
logger.info("Starting OrientDB");
server = OServerMain.create();
OServerConfigurationLoaderXml loaderXml = new OServerConfigurationLoaderXml(OServerConfiguration.class, GraphPersistenceServiceTest.class.getResourceAsStream("/orientdb.config"));
OServerConfiguration oServerConfiguration = new OServerConfiguration(loaderXml);
System.setProperty("ORIENTDB_ROOT_PASSWORD", "admin");
System.setProperty("RUNMODE", "UNITTEST");
OServerNetworkListenerConfiguration networkConfig = oServerConfiguration.network.listeners.iterator().next();
networkConfig.portRange = "3424-3430";
server.setServerRootDirectory("./target/orientdb");
server.startup(oServerConfiguration);
File serverDir = new File("./target/orientdb");
if (serverDir.exists()) {
FileUtils.deleteDirectory(serverDir);
}
serverDir.mkdirs();
File dbDir = new File(serverDir, "databases");
dbDir.mkdirs();
server.activate();
OGlobalConfiguration.dumpConfiguration(System.out);
Thread.sleep(2000);
}
}
Hi that is because when you add edges to the vertex, vertex itself is modified to store this information, but you may work in mode when information about edges is stored in separate object. Merely use property
-DridBag.embeddedToSbtreeBonsaiThreshold=true and you will rid off this exception.
I'm using following snippet for saving content:
private void writeToFile(NodeRef nodeRef, String content) throws IOException {
ContentWriter writer = contentService.getWriter(nodeRef, ContentModel.PROP_CONTENT, true);
InputStream contentStream = new ByteArrayInputStream(content.getBytes(encoding));
writer.setMimetype(mimeType);
writer.setEncoding(encoding);
writer.putContent(contentStream);
Map<QName, Serializable> repoProps = nodeService.getProperties(nodeRef);
ContentData contentData = (ContentData) repoProps.get(ContentModel.PROP_CONTENT);
if(contentData == null)
contentData = writer.getContentData();
contentData = ContentData.setEncoding(contentData, encoding);
contentData = ContentData.setMimetype(contentData, mimeType);
repoProps.put(ContentModel.PROP_CONTENT, contentData);
contentStream.close();
nodeService.setProperties(nodeRef, repoProps);
}
When I read content written this way within short period of time (depends on server load) in other place, old content is returned. So it looks like that maybe indexing is in progress, so before final commit old content is returned, is that possible? If so, is it possible to override this behavior and access newest possible content? Via contentUrl?
To avoid this behavior I'm using thread for each read request, which sleeps for some time at the beginning, but I really dislike this "solution".
Edit: I built from newest SVN source, running on Tomcat 6.0.35 on Linux (CentOS and Ubuntu); system load - i mean hundreds of files changing every few seconds.
Edit: reading looks like this:
private byte[] readFileContent(NodeRef nodeRef) throws IOException {
ContentReader reader = contentService.getReader(nodeRef, ContentModel.PROP_CONTENT);
if(reader == null)
return null;
InputStream originalInputStream = reader.getContentInputStream();
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
final int BUF_SIZE = 1 << 8; // 1KiB buffer
byte[] buffer = new byte[BUF_SIZE];
int bytesRead = -1;
while ((bytesRead = originalInputStream.read(buffer)) > -1) {
outputStream.write(buffer, 0, bytesRead);
}
originalInputStream.close();
return outputStream.toByteArray();
}
Ok, solved with simplier saving like this:
ContentWriter writer = contentService.getWriter(nodeRef, ContentModel.PROP_CONTENT, true);
InputStream contentStream = new ByteArrayInputStream(content.getBytes(encoding));
writer.setMimetype(mimeType);
writer.setEncoding(encoding);
writer.putContent(contentStream);
contentStream.close();
Previous saving was at place because of some content encoding problems, so testing shows if this works.