I need to take data(input.xml) from one file which is size in 100MB-200MB and need to write into four different files based on some logic.
input xml :
<?xml version="1.0"?>
<Orders>
<Order><OrderId>1</OrderId><Total>10</Total><Name>jon1</Name></Order>
<Order><OrderId>2</OrderId><Total>20</Total><Name>jon2</Name></Order>
<Order><OrderId>3</OrderId><Total>30</Total><Name>jon3</Name></Order>
<Order><OrderId>4</OrderId><Total>40</Total><Name>jon4</Name></Order>
<Orders>
logic is if Total is 1-10 then write to file1 and if Total is 11-20 then write to file2.....,
expected output:
1 10 jon1 -->write into file1
2 20 jon2 -->write into file2
3 30 jon3 -->write into file3
4 40 jon4 -->write into file4
Here i have enabled streaming in datamapper which is under configuration but i'm not getting proper output. The problem is i'm getting only some recodes into only one file which should come into that file after satisfying the condition.
But if i disable streaming button in datamapper it is working fine. As there are lakes of records i must use streaming option.
Is there any otherway to configure datamapper to enable streaming option..?
Please suggest me on this., Thanks.,
It is difficult to see a problem without a little more detail on what you are doing.
Nevertheless, I think this probably will help you to try another approach.
The data mapper will load the full XML document into memory although you activate streaming, it has to do it in order to support XPATH (it loads the full xml input into a DOM).
So if you can not afford to load 200Mb document into memory you will need to try a workaround.
What I have done before is creating a java component that transforms the input stream to an iterator with the help of a stax parser. With a very simple implementation you can code an iterator that pulls from the stream to create the next element (a pojo, a map, a string...). In the mule flow, after the "java component", you should be able to use a "for-each" with a "choice" within and apply your logic.
A quick example for your data:
package tests;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import javax.xml.stream.FactoryConfigurationError;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class OrdersStreamIterator implements Iterator<Map<String,String>> {
final static Log LOGGER = LogFactory.getLog(OrdersStreamIterator.class);
final InputStream is;
final XMLStreamReader xmlReader;
boolean end = false;
HashMap<String,String> next;
public OrdersStreamIterator(InputStream is)
throws XMLStreamException, FactoryConfigurationError {
this.is = is;
xmlReader = XMLInputFactory.newInstance().createXMLStreamReader(is);
}
protected HashMap<String,String> _next() throws XMLStreamException {
int event;
HashMap<String,String> order = null;
String orderChild = null;
String orderChildValue = null;
while (xmlReader.hasNext()) {
event = xmlReader.getEventType();
if (event == XMLStreamConstants.START_ELEMENT) {
if (order==null) {
if (checkOrder()) {
order = new HashMap<String,String>();
}
}
else {
orderChild = xmlReader.getLocalName();
}
}
else if (event == XMLStreamConstants.END_ELEMENT) {
if (checkOrders()) {
end = true;
return null;
}
else if (checkOrder()) {
xmlReader.next();
return order;
}
else if (order!=null) {
order.put(orderChild, orderChildValue);
orderChild = null;
orderChildValue = null;
}
}
else if (order!=null && orderChild!=null){
switch (event) {
case XMLStreamConstants.SPACE:
case XMLStreamConstants.CHARACTERS:
case XMLStreamConstants.CDATA:
int start = xmlReader.getTextStart();
int length = xmlReader.getTextLength();
if (orderChildValue==null) {
orderChildValue = new String(xmlReader.getTextCharacters(), start, length);
}
else {
orderChildValue += new String(xmlReader.getTextCharacters(), start, length);
}
break;
}
}
xmlReader.next();
}
end = true;
return null;
}
protected boolean checkOrder() {
return "Order".equals(xmlReader.getLocalName());
}
protected boolean checkOrders() {
return "Orders".equals(xmlReader.getLocalName());
}
#Override
public boolean hasNext() {
if (end) {
return false;
}
else if (next==null) {
try {
next = _next();
} catch (XMLStreamException e) {
LOGGER.error(e.getMessage(), e);
end = true;
}
return !end;
}
else {
return true;
}
}
#Override
public Map<String,String> next() {
if (hasNext()) {
final HashMap<String,String> n = next;
next = null;
return n;
}
else {
return null;
}
}
#Override
public void remove() {
throw new RuntimeException("ReadOnly!");
}
// Test
public static String dump(Map<String,String> o) {
String s = "{";
for (Entry<String,String> e : o.entrySet()) {
if (s.length()>1) {
s+=", ";
}
s+= "\"" + e.getKey() + "\" : \"" + e.getValue() + "\"";
}
return s + "}";
}
public static void main(String[] argv) throws XMLStreamException, FactoryConfigurationError {
final InputStream is = OrdersStreamIterator.class.getClassLoader().getResourceAsStream("orders.xml");
final OrdersStreamIterator i = new OrdersStreamIterator(is);
while (i.hasNext()) {
System.out.println(dump(i.next()));
}
}
}
An example flow:
<flow name="testsFlow">
<http:listener config-ref="HTTP_Listener_Configuration" path="/" doc:name="HTTP"/>
<scripting:component doc:name="Groovy">
<scripting:script engine="Groovy"><![CDATA[return tests.OrdersStreamIterator.class.getClassLoader().getResourceAsStream("orders.xml");]]></scripting:script>
</scripting:component>
<set-payload value="#[new tests.OrdersStreamIterator(payload)]" doc:name="Iterator"/>
<foreach doc:name="For Each">
<logger message="#[tests.OrdersStreamIterator.dump(payload)]" level="INFO" doc:name="Logger"/>
</foreach>
</flow>
package com.example.notificationlistener;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.service.notification.NotificationListenerService;
import android.service.notification.StatusBarNotification;
import android.support.v4.content.LocalBroadcastManager;
import android.util.Log;
public class NotificationService extends NotificationListenerService {
Context context;
#Override
public void onCreate() {
super.onCreate();
context = getApplicationContext();
}
#Override
public void onNotificationPosted(StatusBarNotification sbn)
{
Log.i("From service","onNotificationPosted");
String pack = sbn.getPackageName();
// if("com.twitter.android".equalsIgnoreCase(pack))
// if("com.google.android.gm".equalsIgnoreCase(pack))
{
String ticker = sbn.getNotification().tickerText.toString();
Bundle extras = sbn.getNotification().extras;
String title = extras.getString("android.title");
String text = extras.getCharSequence("android.text").toString();
Log.i("Package",pack);
Log.i("Ticker",ticker);
Log.i("Title",title);
Log.i("Text",text);
Intent msgrcv = new Intent("Msg");
msgrcv.putExtra("package", pack);
msgrcv.putExtra("ticker", ticker);
msgrcv.putExtra("title", title);
msgrcv.putExtra("text", text);
LocalBroadcastManager.getInstance(context).sendBroadcast(msgrcv);
}
}
#Override
public void onNotificationRemoved(StatusBarNotification sbn)
{
Log.i("Msg","Notification Removed");
}
}
this is my service class
package com.example.notificationlistener;
import java.util.Locale;
import android.app.Notification;
import android.app.NotificationManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.graphics.Color;
import android.os.Bundle;
import android.speech.tts.TextToSpeech;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v7.app.ActionBarActivity;
import android.text.Html;
import android.util.Log;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity implements TextToSpeech.OnInitListener{
TableLayout tableLayout;
TextToSpeech textToSpeech;
String text = "noText";
String title = "noTitle";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tableLayout = (TableLayout)findViewById(R.id.tab);
textToSpeech = new TextToSpeech(this, null);
LocalBroadcastManager.getInstance(this).registerReceiver(onNotice, new IntentFilter("Msg"));
}
private BroadcastReceiver onNotice= new BroadcastReceiver() {
#SuppressWarnings("deprecation")
#Override
public void onReceive(Context context, Intent intent) {
Log.w("From MainActivity", "broadcast receiver is called");
String pack = intent.getStringExtra("package");
String ticker = intent.getStringExtra("ticker");
title = intent.getStringExtra("title");
text = intent.getStringExtra("text");
Log.d("mainActivity_pack", pack);
Log.d("mainActivity_title", title);
Log.d("mainActivity_text", text);
Log.d("mainActivity_ticker", ticker);
// Log.d("mainActivity", sender);
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notification(R.drawable.ic_launcher, "New Message", System.currentTimeMillis()+5000);
notification.setLatestEventInfo(context, title, text, null);
notification.flags |= Notification.FLAG_AUTO_CANCEL;
notification.defaults |= Notification.DEFAULT_SOUND;
notificationManager.notify(2, notification);
speak();
TableRow tr = new TableRow(getApplicationContext());
tr.setLayoutParams(new TableRow.LayoutParams( TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT));
TextView textview = new TextView(getApplicationContext());
textview.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT, TableRow.LayoutParams.WRAP_CONTENT,1.0f));
textview.setTextSize(20);
textview.setTextColor(Color.parseColor("#0B0719"));
textview.setText(Html.fromHtml(pack +"<br><b>" + title + " : </b>" + text));
tr.addView(textview);
tableLayout.addView(tr);
}
};
protected void onDestroy()
{
super.onDestroy();
if (textToSpeech != null)
{
textToSpeech.stop();
textToSpeech.shutdown();
}
LocalBroadcastManager.getInstance(this).unregisterReceiver(onNotice);
}
#Override
public void onInit(int status) {
if (status == TextToSpeech.SUCCESS) {
int result = textToSpeech.setLanguage(Locale.US);
if (result == TextToSpeech.LANG_MISSING_DATA
|| result == TextToSpeech.LANG_NOT_SUPPORTED) {
Log.e("TTS", "This Language is not supported");
} else
{
speak();
}
} else {
Log.e("TTS", "Initilization Failed!");
}
}
private void speak()
{
textToSpeech.speak(text, TextToSpeech.QUEUE_FLUSH, null);
}`enter code here`
}
this is my activity. i am trying to read notification and resend them through my app so done this and i am able to get the notifications but when my app is closed its not working so please suggest me some changes or suggestions...thanks
Put your broadcast receiver into a service. Activities don't run when the app is closed. Services do. Start your services from your activity. Then they will continue to run even after closing the app.
I used the Netbeans and GeoTools to program a graphical interface to display multiple shapefiles in the same JmapFrame. I used the following code but I do not know, when execute, it display only one shapefile.Svp, someone can help me, I await your answers.
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.Geometry;
import java.io.File;
import org.geotools.data.FeatureSource;
import org.geotools.data.FileDataStore;
import org.geotools.data.FileDataStoreFinder;
import org.geotools.data.simple.SimpleFeatureCollection;
import org.geotools.data.simple.SimpleFeatureIterator;
import org.geotools.map.DefaultMapContext;
import org.geotools.map.MapContext;
import org.geotools.swing.JMapFrame;
import org.geotools.swing.data.JFileDataStoreChooser;
import org.opengis.feature.simple.SimpleFeature;
/**
*
* #author Brahim
*/
class ImportVecteur2
{
private JMapFrame fenMap;
private MapContext mapContext;
ImportVecteur2(JMapFrame fenMap)
{
//this.mapContext = mapContext;
this.fenMap = fenMap;
}
#SuppressWarnings("static-access")
public void chercheAfficheVecteur() //throws Exception
{
try
{
File file = JFileDataStoreChooser.showOpenFile("shp", null);
if (file == null)
{
return;
}
FileDataStore store = FileDataStoreFinder.getDataStore(file);
FeatureSource featureSource = store.getFeatureSource();
//get vertices of file
// Create a map context and add our shapefile to it
mapContext = new DefaultMapContext();
mapContext.addLayer(featureSource, null);
// Now display the map
fenMap.enableLayerTable(true);
fenMap.setMapContext(mapContext);
fenMap.setVisible(true);
}
Each time you call chercheAfficheVecteur you create a new MapContext so the previous one is thrown away and with it your previous shapefile. If you change the method to be
public void chercheAfficheVecteur() {
try {
File file = JFileDataStoreChooser.showOpenFile("shp", null);
if (file == null) {
return;
}
FileDataStore store = FileDataStoreFinder.getDataStore(file);
FeatureSource featureSource = store.getFeatureSource();
//get vertices of file
// Create a map context and add our shapefile to it
if(mapContext == null){
mapContext = new DefaultMapContext();
fenMap.setMapContext(mapContext);
}
//make it look prettier
Style style = SLD.createSimpleStyle(featureSource.getSchema());
mapContext.addLayer(featureSource, style);
}
and
ImportVecteur2(JMapFrame fenMap)
{
//this.mapContext = mapContext;
this.fenMap = fenMap;
fenMap.enableLayerTable(true);
fenMap.setVisible(true);
}
It should work better.
After further testing (i.e. I actually compiled some code) - MapContext is deprecated (and has been for some time) please use MapContent.
package org.geotools.tutorial.quickstart;
import java.awt.Color;
import java.awt.Dimension;
import java.io.File;
import java.io.IOException;
import org.geotools.data.FeatureSource;
import org.geotools.data.FileDataStore;
import org.geotools.data.FileDataStoreFinder;
import org.geotools.map.FeatureLayer;
import org.geotools.map.Layer;
import org.geotools.map.MapContent;
import org.geotools.styling.SLD;
import org.geotools.styling.Style;
import org.geotools.swing.JMapFrame;
import org.geotools.swing.data.JFileDataStoreChooser;
public class Test {
private static final Color[] color = { Color.red, Color.blue, Color.green,
Color.MAGENTA };
private static MapContent mapContext;
private static JMapFrame fenMap;
public static void main(String args[]) throws IOException {
Test me = new Test();
me.run();
}
public void run() throws IOException {
fenMap = new JMapFrame();
mapContext = new MapContent();
fenMap.setMapContent(mapContext);
fenMap.enableToolBar(true);
fenMap.setMinimumSize(new Dimension(300, 300));
fenMap.setVisible(true);
int i = 0;
while (chercheAfficheVecteur(i)) {
i++;
i = i % color.length;
}
}
public boolean chercheAfficheVecteur(int next) throws IOException {
File file = JFileDataStoreChooser.showOpenFile("shp", null);
if (file == null) {
return false;
}
FileDataStore store = FileDataStoreFinder.getDataStore(file);
FeatureSource featureSource = store.getFeatureSource();
// get vertices of file
// Create a map context and add our shapefile to it
if (mapContext == null) {
}
// make it look prettier
Style style = SLD.createSimpleStyle(featureSource.getSchema(), color[next]);
Layer layer = new FeatureLayer(featureSource, style);
mapContext.addLayer(layer);
return true;
}
}
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Calling camera from an activity, capturing an image and uploading to a server
i am very new to android, i am trying to capture the image after that i placed that image into image view,its working on emulator but in device it crashes it shows the message force close even it cannot open the camera activity.the following is my code.
please help me how to solve this problem.thank you.
package com.gss.android;
package com.gss.android;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import android.app.Activity;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
public class Pictures extends Activity{
Button btnsave,btnnewpic;
protected ImageView image;
protected String _path;
File sdImageMainDirectory;
private static final int IMAGE_CAPTURE = 0;
protected boolean _taken = true;
private Uri imageUri;
protected static final String PHOTO_TAKEN = "photo_taken";
private static final int CAMERA_PIC_REQUEST = 1;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.pictures);
btnsave=(Button)findViewById(R.id.btnsave);
btnnewpic=(Button)findViewById(R.id.btnnewpic);
btnnewpic.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
startCameraActivity2();
}
});
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if ( requestCode == CAMERA_PIC_REQUEST){
if (resultCode == RESULT_OK){
switch (resultCode) {
case 0:
finish();
break;
case -1:
try {
StoreImage(this, Uri.parse(data.toURI()),
sdImageMainDirectory);
Log.e("file path", "stiring file") ;
} catch (Exception e) {
e.printStackTrace();
}
finish();
}
}
} else if ( requestCode == IMAGE_CAPTURE) {
if (resultCode == RESULT_OK){
Log.d("ANDRO_CAMERA","Picture taken!!!");
ImageView image = (ImageView) findViewById(R.id.image);
image.setImageURI(imageUri);
}
}
}
protected void startCameraActivity2()
{
Log.d("ANDRO_CAMERA", "Starting camera on the phone...");
String fileName = "testphoto.jpg";
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, fileName);
values.put(MediaStore.Images.Media.DESCRIPTION,
"Image capture by camera");
values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg");
imageUri = getContentResolver().insert(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
startActivityForResult(intent, IMAGE_CAPTURE);
}
#Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
if (savedInstanceState.getBoolean(Pictures.PHOTO_TAKEN)) {
_taken = true;
}
}
#Override
protected void onSaveInstanceState(Bundle outState) {
outState.putBoolean(Pictures.PHOTO_TAKEN, _taken);
}
public static void StoreImage(Context mContext, Uri imageLoc, File imageDir) {
Bitmap bm = null;
try {
bm = MediaStore.Images.Media.getBitmap(mContext.getContentResolver(), imageLoc);
FileOutputStream out = new FileOutputStream(imageDir);
bm.compress(Bitmap.CompressFormat.JPEG, 100, out);
Log.e("file dir",imageDir.toString());
bm.recycle();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}
I think this is a problem related to the emulator and not the physical device.
I used this code and I got a bitmap:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
captureButton = (Button)findViewById(R.id.capture);
captureButton.setOnClickListener(listener);
imageView = (ImageView)findViewById(R.id.image);
destination = new File(Environment.getExternalStorageDirectory(),"image.jpg");
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if(requestCode == REQUEST_IMAGE && resultCode == Activity.RESULT_OK) {
//Bitmap userImage = (Bitmap)data.getExtras().get("data");
try {
FileInputStream in = new FileInputStream(destination);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 10; //Downsample 10x
Bitmap userImage = BitmapFactory.decodeStream(in, null, options);
imageView.setImageBitmap(userImage);
} catch (Exception e) {
e.printStackTrace();
}
}
}
private View.OnClickListener listener = new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
//Add extra to save full-image somewhere
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(destination));
Toast.makeText(JMABarcodeScannerActivity.this, Uri.fromFile(destination).toString(), Toast.LENGTH_SHORT).show();
startActivityForResult(intent, REQUEST_IMAGE);
}
};
}
Main.XML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button
android:id="#+id/capture"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Take a Picture"
/>
<ImageView
android:id="#+id/image"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:scaleType="centerInside"
/>
</LinearLayout>
All Gmail users should have already noticed that file upload progress bar has been updated recently.
I'm wondering such effect is possible to implement with GWT.
I'm fairly new with GWT, so if any GWT source code that can help me test out the function would be very helpful.
Update
I ended up going with SWFUpload. However, other suggestions under this question are all valid. Just try different options and choose the one you like!
Take a look to this library: http://code.google.com/p/gwtupload/. It is really easy to to use and works fine in all browsers and OS I've checked. It uses ajax requests to calculate progress. BTW Swfupload doesn't do well in linux and Mac.
I've used this tool before:
http://code.google.com/p/gwt-fileapi/
Unlike the other suggestions here, not only does it give the proper API to show upload progress, it also gives the ability to do batch uploads by selecting multiple files, and it also gives drag and drop support. It also has a pre HTML5 fallback mechanism.
I've had had great luck with it gwt-fileap. Recently it broke in Firefox 7 and 8 and I had to apply this patch to it - but otherwise it works really great:
## -57,26 +57,33 ##
/**
* gets the filename
- *
+ *
* #return the filename
*/
public final native String getFileName() /*-{
- return this.fileName;
+ if(this.name)
+ return this.name;
+ else
+ return this.fileName;
+
}-*/;
/**
* gets the file size in bytes
- *
+ *
* #return the file size in bytes
*/
public final native int getFileSize() /*-{
- return this.fileSize;
+ if(this.size)
+ return this.size;
+ else
+ return this.fileSize;
}-*/;
/**
* gets the MIME type of the file, may be null if the browser cannot detect
* the type
I also had to add the following lines to http://code.google.com/p/gwt-fileapi/source/browse/trunk/gwt-fileapi/src/com/gwtpro/html5/fileapi/Html5FileApi.gwt.xml - these lines describe how the fallback mechanism works. You can do something similar if you want your code to fall back on the SWFUploader implementation shown below in case HTML5 is missing.
<define-property name="fileapi.support" values="yes,no" />
<property-provider name="fileapi.support"><![CDATA[
var input=document.createElement('input');
input.setAttribute('type','file');
return input.files==null?'no':'yes';
]]></property-provider>
<replace-with
class="com.gwtpro.html5.fileapi.client.ui.FileInput.FileInputImplHtml5">
<when-type-is
class="com.gwtpro.html5.fileapi.client.ui.FileInput.FileInputImpl" />
<when-property-is name="fileapi.support" value="yes" />
<any>
<when-property-is name="user.agent" value="ie8" />
<when-property-is name="user.agent" value="safari" />
<when-property-is name="user.agent" value="gecko1_8" />
<when-property-is name="user.agent" value="opera" />
<when-property-is name="user.agent" value="chrome" />
</any>
</replace-with>
This is how I use it in my application:
This is the interface that describes the abstraction:
public interface FileUpload {
public void uploadFiles();
public Widget getWidget();
public void initialize(Grid updateTable, Uploader uploader, String url, boolean createDropHandler);
public void setDisabled(boolean b);
public void readyToPaint();
public void reset();
}
The following is the gwt-fileapi implementation of the interface:
package com.hierarchycm.gxt.client.fileUpload;
import com.google.gwt.core.client.JsArray;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.http.client.RequestException;
import com.google.gwt.http.client.Response;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Grid;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.Widget;
import com.gwtpro.html5.fileapi.client.FileApiSupport;
import com.gwtpro.html5.fileapi.client.drop.DropHandler;
import com.gwtpro.html5.fileapi.client.file.File;
import com.gwtpro.html5.fileapi.client.file.FileEvent;
import com.gwtpro.html5.fileapi.client.file.FileEvent.FileEventHandler;
import com.gwtpro.html5.fileapi.client.ui.FileInput;
import com.gwtpro.html5.fileapi.client.upload.UploadRequest;
import com.gwtpro.html5.fileapi.client.upload.UploadRequestBuilder;
import com.gwtpro.html5.fileapi.client.upload.UploadRequestCallback;
public class FileUploadHtmlImpl extends FileInput implements FileUpload {
private Grid uploadTable;
int currentFile =0;
String url;
File[] files;
UploadRequestBuilder fileUploader;
Uploader uploader;
public FileUploadHtmlImpl() {
}
FileUploadHtmlImpl(Grid updateTable, Uploader uploader, String url) {
this(updateTable, uploader, url, true);
}
FileUploadHtmlImpl(Grid updateTable, Uploader uploader, String url, boolean createDropHandler) {
initialize(updateTable, uploader, url, createDropHandler);
//this.setCallback(getMyCallback());
}
public void initialize(Grid updateTable, Uploader uploader, String url, boolean createDropHandler){
this.url = url;
this.uploadTable = updateTable;
this.uploader = uploader;
this.setAllowMultipleFiles(true);
this.addChangeHandler(new ChangeHandler() {
#Override
public void onChange(ChangeEvent event) {
addFiles(FileUploadHtmlImpl.this.getFiles());
uploadFiles();
}
});
if (createDropHandler) {
createDropHandler();
}
}
private File[] jsArrToArr (JsArray<File> ipFiles) {
File [] result = new File [ipFiles.length()];
for (int i = 0; i < ipFiles.length(); ++i) {
result[i] = ipFiles.get(i);
}
return result;
}
private UploadRequestCallback getMyCallback() {
return new UploadRequestCallback() {
#Override
public void onError(UploadRequest request, Throwable exception) {
uploadTable.setText(currentFile + 1, 2, "failed: " + exception.getMessage());
uploadNextFile(currentFile + 1);
}
#Override
public void onResponseReceived(UploadRequest request, Response response) {
uploadTable.setText(currentFile + 1, 2, "success: " + response.getText());
uploadNextFile(currentFile + 1);
//If we just finished uploading do your thing
if (currentFile == files.length) {
setDisabled(false);
uploader.uploadDoneEventHandler();
}
}
#Override
public void onUploadProgress(UploadRequest request, int bytesUploaded) {
uploadTable.setText(currentFile + 1, 2, bytesUploaded + "");
}
};
}
public void createDropHandler() {
RootPanel rootPanel = RootPanel.get();
DropHandler dropHandler = new DropHandler(rootPanel);
this.fileUploader = new UploadRequestBuilder(url);
this.fileUploader.setCallback(getMyCallback());
dropHandler.addFileEventHandler(new FileEventHandler() {
#Override
public void onFiles(FileEvent event) {
addFiles(jsArrToArr(event.getFiles()));
uploadFiles();
}
});
}
private void addFiles (File[] ipFiles) {
files = ipFiles;
uploadTable.clear();
uploadTable.resize(files.length + 1, 3);
uploadTable.setText(0, 0, "File name");
uploadTable.setText(0, 1, "File size");
uploadTable.setText(0, 2, "Progress");
for (int i = 0; i < files.length; ++i) {
uploadTable.setText(i + 1, 0, files[i].getFileName());
uploadTable.setText(i + 1, 1, files[i].getFileSize() + "");
uploadTable.setText(i + 1, 2, "");
}
}
public void uploadNextFile(int index) {
for (String paramName : uploader.getPostParams().keySet()) {
fileUploader.setHeader(paramName, uploader.getPostParams().get(paramName));
}
currentFile = index;
this.setDisabled(true);
if (index < this.files.length) {
try {
this.fileUploader.setHeader("itemName", files[currentFile].getFileName());
this.fileUploader.sendFile(files[currentFile]);
} catch (RequestException e) {
this.uploadTable.setText(index + 1, 2, "failed: " + e.getMessage());
uploadNextFile(index + 1);
}
}
}
public void uploadFiles() {
uploadNextFile(0);
}
#Override
public Widget getWidget() {
return this;
}
#Override
public void readyToPaint() {
//no need to do anything - already painted for non swf
}
#Override
public void reset() {
// TODO Auto-generated method stub
}
private void showCapabilities() {
RootPanel
.get("status")
.getElement()
.setInnerHTML(
"Drag and Drop Support: "
+ (FileApiSupport.isDragDropSupported() ? "Yes"
: "No")
+ "<br/>HTTPXmlRequest Level 2: "
+ (FileApiSupport.isHttpXmlRequestLevel2() ? "Yes"
: "No")
+ "<br/>File input supports multiple files: "
+ (FileApiSupport
.isMultipleFileInputSupported() ? "Yes"
: "No")+"<br/><br/>");
}
}
This is the SWFUpload http://code.google.com/p/swfupload-gwt/ implementation of the same interface:
package com.hierarchycm.gxt.client.fileUpload;
import com.extjs.gxt.ui.client.widget.Html;
import com.google.gwt.user.client.ui.Grid;
import com.google.gwt.user.client.ui.Widget;
public class FileUploadSwfImpl extends Html implements FileUpload {
SwfUploadUtil swfUploadUtil = null;
private Uploader uploader;
private String url;
private boolean createDropHandler;
private Grid updateTable;
static int uploadId = 0;
static String divTagId;
public FileUploadSwfImpl() {
divTagId = "swfupload" + uploadId++;
String divTag = "<div id=\"" + divTagId + "\"></div";
this.setHtml(divTag);
}
#Override
public void uploadFiles() {
swfUploadUtil.startUpload();
}
#Override
public Widget getWidget() {
return this;
}
public void readyToPaint() {
swfUploadUtil = new SwfUploadUtil(uploader, updateTable, divTagId, url);
}
#Override
public void initialize(Grid updateTable, Uploader uploader, String url, boolean createDropHandler) {
this.uploader = uploader;
this.url = url;
this.createDropHandler = createDropHandler;
this.updateTable = updateTable;
}
#Override
public void setDisabled(boolean b) {
swfUploadUtil.setDisabled(b);
this.disabled = true;
}
#Override
public void reset() {
swfUploadUtil.reset();
}
}
And this is the utility the FileUploadSwfImpl depends on:
package com.hierarchycm.gxt.client.fileUpload;
import java.util.HashMap;
import org.swfupload.client.File;
import org.swfupload.client.SWFUpload;
import org.swfupload.client.UploadBuilder;
import org.swfupload.client.SWFUpload.ButtonAction;
import org.swfupload.client.SWFUpload.ButtonCursor;
import org.swfupload.client.event.DialogStartHandler;
import org.swfupload.client.event.FileDialogCompleteHandler;
import org.swfupload.client.event.FileQueuedHandler;
import org.swfupload.client.event.UploadCompleteHandler;
import org.swfupload.client.event.UploadErrorHandler;
import org.swfupload.client.event.UploadProgressHandler;
import org.swfupload.client.event.UploadSuccessHandler;
import org.swfupload.client.event.FileDialogCompleteHandler.FileDialogCompleteEvent;
import org.swfupload.client.event.FileQueuedHandler.FileQueuedEvent;
import org.swfupload.client.event.UploadCompleteHandler.UploadCompleteEvent;
import org.swfupload.client.event.UploadErrorHandler.UploadErrorEvent;
import org.swfupload.client.event.UploadProgressHandler.UploadProgressEvent;
import org.swfupload.client.event.UploadSuccessHandler.UploadSuccessEvent;
import com.extjs.gxt.ui.client.widget.form.TextArea;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Grid;
public class SwfUploadUtil {
HashMap<String, Integer> filenameRowHm = new HashMap<String, Integer>();
private boolean resetIssued;
SWFUpload swfUpload = null;
private HashMap <String, File> files = new HashMap<String, File>();
int tableRow = 5;
Uploader uploader = null;
private Grid updateTable;
private String divName;
private String url;
synchronized private void removeFile(String id) {
files.remove(id);
}
public SwfUploadUtil(Uploader uploader, Grid updateTable, String divName, String url){
reset();
this.uploader = uploader;
this.updateTable = updateTable;
this.divName = divName;
this.url = url;
this.swfUpload = loadSWFUpload();
updateTable.resize(5, 5);
updateTable.setText(2, 0, "Upload URL:" );
updateTable.setText(2, 1, url );
updateTable.setText(4, 0, "File Name" );
updateTable.setText(4, 1, "Bytes In");
updateTable.setText(4, 2, "Status");
updateTable.setText(4, 3, "File Size" );
updateTable.setText(4, 4, "Server response" );
}
public SWFUpload loadSWFUpload() {
this.updateTable = updateTable;
if (swfUpload == null) {
final UploadBuilder builder1 = new UploadBuilder();
builder1.setHTTPSuccessCodes(200, 201);
builder1.setFileTypes("*.webm;*.asf;*.wma;*.wmv;*.avi;*.flv;*.swf;*.mpg;*.mpeg;*.mp4;*.mov;*.m4v;*.aac;*.mp3;*.wav;*.png;*.jpg;*.jpeg;*.gif");
builder1.setFileTypesDescription("Images, Video & Sound");
builder1.setButtonPlaceholderID(divName);
builder1.setButtonImageURL("./images/XPButtonUploadText_61x22.png");
builder1.setButtonCursor(ButtonCursor.HAND);
builder1.setButtonWidth(61);
builder1.setButtonHeight(22);
builder1.setButtonAction(ButtonAction.SELECT_FILES);
builder1.setUploadProgressHandler(new UploadProgressHandler() {
public void onUploadProgress(UploadProgressEvent e) {
File f = e.getFile();
updateTable.setText(getFilenameRow(f), 2, String.valueOf(e.getBytesComplete()));
}
});
builder1.setUploadSuccessHandler(new UploadSuccessHandler() {
public void onUploadSuccess(UploadSuccessEvent e) {
File f = e.getFile();
updateTable.setText(getFilenameRow(f), 4, e.getServerData());
}
});
builder1.setUploadErrorHandler(new UploadErrorHandler() {
public void onUploadError(UploadErrorEvent e) {
File ff = e.getFile();
String message = e.getMessage();
if (message == null || message.trim().length() == 0) {
message = "upload failed";
}
updateTable.setText(getFilenameRow(ff), 2, String.valueOf(message));
removeFile(ff.getId());
if (files.values().size() > 0) {
ff = files.values().iterator().next();
updateTable.setText(getFilenameRow(ff), 2, "Started");
swfUpload.startUpload(ff.getId());
}
}
});
builder1.setUploadURL(url);
builder1.setDialogStartHandler(new DialogStartHandler() {
#Override
public void onDialogStart() {
if(resetIssued == true) {
filenameRowHm.clear();
resetIssued = false;
}
}
}
);
builder1.setUploadCompleteHandler(new UploadCompleteHandler() {
public void onUploadComplete(UploadCompleteEvent e) {
File f = e.getFile();
updateTable.setText(getFilenameRow(f), 2, "Done");
removeFile(f.getId());
if (files.values().size() > 0) {
File ff = files.values().iterator().next();
updateTable.setText(getFilenameRow(ff), 2, "Started");
swfUpload.startUpload(ff.getId());
} else {
uploader.uploadDoneEventHandler();
}
}
});
builder1.setFileQueuedHandler(new FileQueuedHandler() {
public void onFileQueued(FileQueuedEvent event) {
File f = event.getFile();
updateTable.setText(getFilenameRow(f), 2, "Queued");
files.put(f.getId(), f);
}
});
builder1.setFileDialogCompleteHandler(new FileDialogCompleteHandler() {
public void onFileDialogComplete(FileDialogCompleteEvent e) {
updateTable.setText(2, 0, "Number of files");
updateTable.setText(2, 1, String.valueOf(files.values().size()));
for(File f : files.values()) {
getFilenameRow(f);
}
if (files.values().size() > 0) {
for (String paramName : uploader.getPostParams().keySet()) {
swfUpload.addPostParam(paramName,uploader.getPostParams().get(paramName));
}
}
}
});
swfUpload = builder1.build();
}
return swfUpload;
}
public int getFilenameRow (File f) {
Integer filenamerow = filenameRowHm.get(f.getId());
if (filenamerow == null) {
updateTable.resize(tableRow+1, 5);
filenamerow = new Integer(tableRow++);
updateTable.setText(filenamerow.intValue(), 0, f.getName());
updateTable.setText(filenamerow.intValue(), 3, String.valueOf(f.getSize()));
//updateTable.setText(filenamerow.intValue(), 3, String.valueOf(f));
filenameRowHm.put(f.getId(), filenamerow);
}
return filenamerow.intValue();
}
public void startUpload() {
uploader.uploadStartedEventHandler();
swfUpload.startUpload();
}
public void setDisabled(boolean disabled) {
swfUpload.setButtonDisabled(disabled);
}
public void reset() {
// TODO Auto-generated method stub
resetIssued = true;
}
}
Use SWFUpload via swfupload-gwt
The main advantage over the other methods is this does not require any special server code. You could even upload to another domain (if there is a crossdomain.xml which allows it).
Check out GWTC Upload, which has an implementation of exactly what you're looking for.
It's trivial to write your own if you have a java back end, you just start a file upload and then poll the server on a timer to see where it's up to (say every second or two). The java file upload binaries (the apache commons ones) support telling you the current progress so it's trivial to do.
Recently I started a project of my own called gwtupld
http://github.com/kompot/gwtupld/
The main goal is to provide best file upload experience for cutting edge browsers
and acceptable usability for all others. By the moment, following key features are present
multiple file selection
drag'n'drop
progress bars
slick and simple exterior
consistent behavior for all browsers
ease of visual customization
no external dependencies but GWT
Feel free to fork and submit bugs/feature proposals.
You can check out source code, then type
gradlew gwtcompile devmode
and get it will start a fully functional
sandbox (server side with real file saving should work)
You can use GwtSwfExt which is wrapper on top of SWFUpload (Its same as Swfupload-gwt lib ) you can download example and source code from http://code.google.com/p/gwtswfext.
When creating your own file upload progress, instead of pulling it form server at a small set time, you can have the client to display a indeterminate bar for 2 seconds and have the server calculate the estimated finish time the change back to determinate and pull new estimates every 5, 10 seconds instead. that should have little to no effect on the traffic.
There is custom multiupload plugin demo http://ext4all.com/post/extjs-4-multiple-file-upload