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• In Ant, are a target's tasks guaranteed to be executed in order?

  - by John B.

  In ant, within a target are the tasks guaranteed to be executed in order or do I need to set up a (annoyingly long, thin) dependency chain? I couldn't find the answer in the manual or Google, but I may have just missed it. Much thanks.

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• Set primary key on hibernate generated sequence table

  - by bungrudi

  setup: hibernate 3.3, MySQL 5 I have an hibernate entity that have its PK generated using a sequence table. The annotation looks like this: @GenericGenerator(name = "SCENARIO_TABLE_GEN", strategy = "org.hibernate.id.enhanced.TableGenerator", parameters = { @Parameter(name = "initial_value", value = "5"), @Parameter(name = "force_table_use", value = "true"), @Parameter(name = "table_name", value = "SEQ_TABLE"), @Parameter(name = "value_column_name", value = "VALUE_COL"), @Parameter(name = "segment_column_name", value = "KEY_COL"), @Parameter(name = "segment_value", value = "SCENARIO") }) The problem is, that hibernate generated sequence table (SEQ_TABLE in my case, generated using hbm2ddl) does not have a primary keys. How do I tell hibernate that I want to have the primary key for the sequence table set on KEY_COL ?

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• hibernate connection tomcat

  - by willson albert

  I was working in a web site (production) in Tomcat 7, so now I created a copy of this website and change the hibernate.cfg.xml to work with another database ( testing ). <property name="hibernate.connection.url">jdbc:mysql://127.0.0.1:3306/test</property> <property name="hibernate.connection.username">fake</property> <property name="hibernate.connection.password">fake</property> However, when I open the new new site, everything is ok, but, is still working with the production database even when I changed the connection string. Anybody knows if I need to change another thing?. I missing something?. I am quite new in tomcat. Thanks in advance.

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• getting node value exception

  - by Aswan

  Hi Folks <amount currency="USD">1000500</amount> while parsing above string i am getting only attribute value .when i try to get node value null pointer exception for getting node value using NodeList amountList= estimateElement.getElementsByTagName("amount"); Element amtElement= (Element)amountList.item(0); String amount=amtElement.getFirstChild().getnodevalue() Thanks in advance Aswan

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• Initial state of autoCreateRowSorter in Swing JTable

  - by Nazgulled

  I have this JTable on my Swing app with the autoCreateRowSorter enabled. My table only has 3 columns, two strings and one int, it works well for all of them when I click the column headers. However, I'm looking for way to do it programatically. I wanted to set the "initial state" for this table. With the Windows look and feel, the column header (when sorted) has a little arrow showing the sort order. But at startup that doesn't show, I have to do one initial click. How can I do that by code?

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• JAXM soap message parsing

  - by Dean

  I am getting the following XML back from a .net service: <?xml version="1.0" encoding="utf-8"?> <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <soap:Body> <validateCredentialsResponse xmlns="http://www.paragon.com/positionmonitor/PositionMonitor"> <validateCredentialsResult> <ResultData xsi:type="ValidateCredentialsResultData"> <validated>true</validated> <alreadyLoggedIn>false</alreadyLoggedIn> </ResultData> <Status> <Condition xmlns="">SUCCESS</Condition> <ErrorCode xmlns="">BO.00000</ErrorCode> <ErrorDesc xmlns="">OK</ErrorDesc> </Status> </validateCredentialsResult> </validateCredentialsResponse> </soap:Body> </soap:Envelope> ...and I'm trying to parse it using JAXM, however the following always evaluates to null: SOAPEnvelope env = reply.getSOAPPart().getEnvelope(); Can anyone help me out here?

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• GAE messaging service

  - by cometta

  let say i want my corporate server to communicate with google app engine vise verse. I know that gae do not support JMS,RMI etc. what is the best alternative for this kind of communication?(i think http get is not suitable for this kind of communicate) use task queue? both my corporate server and gae application using spring framework

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• Hibernate - One design problem

  - by Yatendra Goel

  I am learning Hibernate from the tutorial on JBoss website. I have a confusion in a code example located here. There is a Cat class code at 4.1. A simple POJO example. This Cat class has a reference to his mother as private Cat mother; Q1. If the class has an identifier property as id, then wouldn't it be better to store the cat's mother's id instead of cat's mother object. means instead of private Cat mother; wouldn't it be better to have private long motherId; `

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• How to extract product weight from this HTML

  - by Blankman

  My HTML looks like this: <td class="main"><b>Product Weight (2.83 lbs in 1 container)</b></td> I need to get the value 2.83 from the HTML. Need help with the regex. I have this: Pattern p = Pattern.compile( "<td\\sclass=\"main\"><b>Product\\sWeight\\s\\s((?:\\d+\\.)?\\d+ \\w{3})"); But doesn't seem to be working. Am I missing an escape or something?

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• Instantiating custom PropertySourcesPlaceholderConfigurer from spring context

  - by mmona

  I want to define a custom PropertySourcesPlaceholderConfigurer in spring context xml. I want to use there multiple PropertySources, so that I can load part of the configuration from several property files and provide other part dynamically by my custom PropertySource implementation. The advantage is that it should be then easy to adjust the order of loading these property sources just by making modifications to the xml spring configuration. And here I run into a problem: how to define an arbitrary list of PropertySources and inject it into PropertySourcesPlaceholderConfigurer, so that it uses the sources defined by me? Seems to be a basic thing that should be provided by spring, but since yesterday I cannot find a way to do it. Using namespace would enable me to load several property files, but I also need to define the id of the PropertySourcesPlaceholderConfigurer (as other projects refer to it), and also I want to use my custom implementation. That is why I am defining the bean explicitly and not using the namespace. The most intuitive way would be to inject a list of PropertySources into PropertySourcesPlaceholderConfigurer like this: <bean id="applicationPropertyPlaceholderConfigurer" class="org.springframework.context.support.PropertySourcesPlaceholderConfigurer"> <property name="ignoreUnresolvablePlaceholders" value="true" /> <property name="ignoreResourceNotFound" value="true" /> <property name="order" value="0"/> <property name="propertySources"> <list> <!-- my PropertySource objects --> </list> </property> </bean> but unfortunately propertySources is of type PropertySources and does not accept a list. The PropertySources interface has one and only implementor which is MutablePropertySources, which indeed stores list of PropertySource objects, but has no constructor nor setter through which I can inject this list. It only has add*(PropertySource) methods. The only workaround I see now is to implement my own PropertySources class, extending MutablePropertySources, which would accept list of PropertySource objects on creation and manually add it via using add*(PropertySource) method. But why so much workaround would be needed to provide something that I thought was supposed to be the main reason of introducing the PropertySources (having flexible configuration manageable from spring configuration level). Please clarify what am I getting wrong :)

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• how to run TimerTask off main UI thread?

  - by huskyd97

  I am having trouble with a TimerTask Interfering with In App Purchasing (Async Tasks). I am weak with Threads, so I believe it is running on the main UI thread, eating up resources. How can I run this outside the UI thread? I have searched, and tried some suggestions using handlers. but seems like I get the same result, app gets really laggy. when I don't run this task (refreshes every 500mS), the activity runs smoothly, and there are no hangs during In app purchases. Your help is appreciated, code snippet below: public class DummyButtonClickerActivity extends Activity { protected Timer timeTicker = new Timer("Ticker"); private Handler timerHandler = new Handler(); protected int timeTickDown = 20; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.mainhd); // start money earned timer handler TimerTask tick = new TimerTask() { public void run() { myTickTask(); } }; timeTicker.scheduleAtFixedRate(tick, 0, 500); // 500 ms each } // End OnCreate protected void myTickTask() { if (timeTickDown == 0) { /// run my code here //total = total + _Rate; timerHandler.post(doUpdateTimeout); } else if(timeTickDown < 0) { // do nothing } timeTickDown--; } private Runnable doUpdateTimeout = new Runnable() { public void run() { updateTimeout(); } }; private void updateTimeout() { // reset tick timeTickDown = 2; // 2* 500ms == once a second } }

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• How to change database connection without compiling, using JBoss Seam?

  - by MLB

  Hi there: I am developing a web site in Eclipse using JBoss Seam 1.2. My site uses a database (named ALregcli) hosted in a MySQL server. That database has only one table named trazasfallos. The server I am using is local (localhost). When I deploy the site in an "X HOST", the MySQL server it is not in the same computer... the server is in an "Y HOST", so, the connection will not be stablished to the database. I was changing the Context.xml, but it didn't work. The only way it worked was changing the host to connect to in the Context.xml and "recompiling" all the project. Then, it generates the new version of the compiled class trazasfallos.class, and this is the file I have to overwrite for connecting to a new database server. The point is that I want to make the change without "recompiling" anything... Maybe there is a way to make only a "text change" and it will work (maybe in a .xml file)... but I don't know how to do it!! The question is: how to change the connection to the database without recompiling anything in the site?? I am sorry about my English, I am from Cuba.

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• mod_jk or mod_proxy_ajp for clustering tomcat and ssl

  - by robinmag

  Please tell me what is better in supporting clustering and ssl between mod_jk and mod_proxy_ajp. Thank you.

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• How to trigger an application in mobile automatically

  - by san6086

  My idea is to make an application start automatically when a message from a specific user reaches the inbox of the mobile . For example if my friend sends some numbers to my mobile, the sms has to be read and validated first and then calculator ( inbuilt mobile application) has to be triggered and process the numbers from the message. Please help me with the above query.

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• Swing and handling threads

  - by James P.

  There's a couple questions here on StackOverflow on the subject of threading with the Swing api but things still aren't clear. What is the issue with the EDT, what is the proper way to initiate a Thread with Swing and in what cases should it be used? P.S: Any sources in terms of good practises would be appreciated.

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• How can i initialize an array without knowing it size?

  - by Sara

  I have a situation where i have to apply a criteria on an input array and reuturn another array as output which will have smaller size based upon the filtering criteria. Now problem is i do not know the size of filtered results, so i can not initialize the array with specific value. And i do not want it to be large size will null values because i am using array.length; later on. One way is to first loop the original input array and set a counter, and then make another loop with that counter length and initialize and fill this array[]. But is there anyway to do the job in just one loop?

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• How can find out the system default currency symbol on BlackBerry?

  - by ageektrapped

  I have a need to display a currency value in my application. There doesn't seem to be an easy way to do this with the RIM API, so I'm reduced to creating my own solution (a common refrain for BlackBerry development, unfortunately) Currently I'm using the Formatter class, from javax.microedition.locale like so protected String formatResult(double result) { try { Locale l = Locale.getDefaultForSystem(); Formatter formatter = new Formatter(l.toString()); return formatter.formatCurrency(result); } catch (UnsupportedLocaleException e) { return "This fails for the default locale because BlackBerry sucks"; } } I always hit the catch block in the simulator. Since this doesn't work by default on the simulator, I'm hesitant to put it in the application. So I have two questions: Can anyone tell me if the above solution is the way to go? And how to fix it, of course. Is there a way I can retrieve the currency symbol for the current locale programmatically so I can format myself?

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• How to define a url not found servlet mapping in web.xml?

  - by user246114

  Hi, I have a web app, I want to define my index.jsp file to be shown when the entered url is like: www.mysite.com www.mysite.com/ www.mysite.com/index.jsp but if any other url is entered, like: wwww.mysite.com/g I want a particular servlet to handle the request. In my web.xml file, I am doing this: <servlet> <servlet-name>ServletCore</servlet-name> <servlet-class>com.me.test.ServletCore</servlet-class> </servlet> <servlet-mapping> <servlet-name>ServletCore</servlet-name> <url-pattern>/*</url-pattern> </servlet-mapping> so that is letting the ServletCore servlet pick up any url, but as expected it is taking over even the: www.mysite.com/index.jsp type urls. How can I define it in such a way to work how I want? Thank you

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• Servlet File Upload Memory Consumption

  - by Scott

  Hi, I'm using a servlet to do a multi fileupload (using apache commons fileupload to help). A portion of my code is posted below. My problem is that if I upload several files at once, the memory consumption of the app server jumps rather drastically. This is probably OK if it were only until the file upload is finished, but the app server seems to hang on to the memory and never return it to the OS. I'm worried that when I put this into production I'll end up getting an out of memory exception on the server. Any ideas on why this is happening? I'm thinking the server may have started a session and will give the memory back after it expires, but I'm not 100% positive. if(ServletFileUpload.isMultipartContent(request)) { ServletFileUpload upload = new ServletFileUpload(); FileItemIterator iter = upload.getItemIterator(request); while(iter.hasNext()) { FileItemStream license = iter.next(); if(license.getFieldName().equals("upload_button") || license.getName().equals("")) continue; //DataInputStream stream = new DataInputStream(license.openStream()); InputStream stream = license.openStream(); ArrayList<Integer> byteArray = new ArrayList<Integer>(); int tempByte; do { tempByte = stream.read(); byteArray.add(tempByte); }while(tempByte != -1); stream.close(); byteArray.remove(byteArray.size()-1); byte[] bytes = new byte[byteArray.size()]; int i = 0; for(Integer tByte : byteArray) { bytes[i++] = tByte.byteValue(); } Thanks in advanced!!

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• How to know the File path in servlet.

  - by niky

  If i upload any file in the JSP then how i know the full path of the location where the file is save on servlet.

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• DLL takes forever to load in JNI class

  - by Rodrigo

  Hi, I'm working with a jni application that loads a dll library, but the load of it is taking too long. The dll is in the path. As a relevant informat, this dll depends on other oracle dlls that are also in the path. System.loadLibrary("exmaple.dll"); Do you have any idea why the load never ends?

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• im writing this code so the user would enter his/her name and followed by his/her marks to get the a

  - by WM

  What if the user wanted to enter his/her grades in the following way: Will 23, 34, 45, 45 how would i get rid of the commas public class StudentAverage { public static void main(String[] args) { int markSum = 0; double average = 0; Scanner input1 = new Scanner(System.in); System.out.print("Enter student record : "); String name = input1.next(); Scanner input2 = new Scanner(input1.nextLine()); int countTotal = 0; while (input2.hasNextInt()) { countTotal++; markSum += input2.nextInt(); } average = markSum / countTotal; // to calculate the total average System.out.print( name + " " + average ); } }

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• Help choosing the right data structure

  - by devoured elysium

  I need a data structure with the following requirements: Needs to be able to get elements by index (like a List). I will always just add / remove elements from the end of the structure. I am inclined to use an ArrayList. In this situation, it seems to be O(1) both to read elements (they always are?), remove elements (I only need to remove them at the end of the list) and to add(I only add to the end of the list). There is only the problem that time to time the ArrayList will have a performance penalty when it's completly full and I need to add more elements to it. Is there any other better idea? I don't think of a data structure that'd beat the ArrayList here. Thanks

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• How to create an ARGB_8888 pixel value?

  - by vidstige

  Say I want to create an array of pixel values to pass into the createBitmap method described here. I have three int values r, g, b in the range 0 - 0xff. How do I transform those into a opaque pixel p? Does the alpha channel go in the high byte or the low byte? I googled up the documentation but it only states that: Each pixel is stored on 4 bytes. Each channel (RGB and alpha for translucency) is stored with 8 bits of precision (256 possible values.) This configuration is very flexible and offers the best quality. It should be used whenever possible. So, how to write this method? int createPixel(int r, int g, int b) { retrurn ? }

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• Who to convert a non serializable object to byte array?

  - by Tom Brito

  Who to convert a non serializable object to byte array?

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