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  • Memory Profiling: How to detect which application/package is consuming too much memory

    - by malvim
    Hi, I have a situation here at work where we run a JEE server with several applications deployed on it. Lately, we've been having frequent OutOfMemoryException's. We suspect some of the apps might be behaving badly, maybe leaking, or something. The problem is, we can't really tell which one. We have run some memory profilers (like YourKit), and they're pretty good at telling what classes use the most memory. But they don't show relationships between classes, so that leaves us with a situation like this: We see that there are, say, lots of Strings and int arrays and HashMap entries, but we can't really tell which application or package they come from. Is there a way of knowing where these objects come from, so we can try to pinpoint the packages (or apps) that are allocating the most memory? Thank you in advance.

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  • Creating multiple log files of different content with log4j

    - by Daniel
    Is there a way to configure log4j so that it outputs different levels of logging to different appenders? I'm trying to set up multiple log files. The main log file would catch all INFO and above messages for all classes. (In development, it would catch all DEBUG and above messages, and TRACE for specific classes.) Then, I would like to have a separate log file. That log file would catch all DEBUG messages for a specific subset of classes, and ignore all messages for any other class. Is there a way to get what I'm after? Thanks, Dan

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  • How to split a path platform independent?

    - by Janusz
    I'm using the following code to get an array with all sub directories from a given path. String[] subDirs = path.split(File.separator); I need the array to check if certain folders are at the right place in this path. This looked like a good solution until findBugs complains that File.separator is used as a regular expression. It seems that passing the windows file separator to a function that is building a regex from it is a bad idea because the backslash being an escape character. How can I split the path in a cross platform way without using File.separator? Or is code like this okay? String[] subDirs = path.split("/");

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  • Which web application framework?

    - by Fergal
    From the following list of frameworks, which one would you use to develop a rich web application and why would you choose it over the others? Sproutcore GWT ExtJS GXT SmartGWT Dojo / Dijit Flex Capuccino Grails

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  • how to keep same header on starting of next page in pdf

    - by Santosh Singh
    Here is My Code. private void getActionItems(Document document, Chapter chapter, Section section, Paragraph pas) { List drbRefList = null; try { _actionService = new ActionItemImpl(); _aiBean = new ActionItemData(); if (_aiBean != null) { _actionList = new ArrayList(); LOG.info("business passed here is" + _business); _actionList = _actionService.getActionItemsForPDF(_userSSOID, _business, _reviewID, _connection); } LOG.info(" after calling getActionItemsForPDF"); LOG.info("_actionList" + _actionList); Table tablesh1 = new Table(1, 1); float[] widthsh1 = new float[1]; widthsh1[0] = ReviewConstants.MAGIC_DOTTWELVE; tablesh1.setTableFitsPage(true); tablesh1.setPadding(2); tablesh1.setSpacing(0); tablesh1.setWidth(ReviewConstants.MAGIC_ONEZEROZERO); tablesh1.setWidths(widthsh1); tablesh1.setBorderColor(Color.WHITE); Cell hcell = new Cell(new Paragraph(ReviewConstants.S_ACTIONHEADING, new Font(Font.HELVETICA, fontSize, Font.BOLD, Color.BLUE))); hcell.setHeader(true); tablesh1.addCell(hcell); section.add(tablesh1); Table actionTable = null; String businessUnit = reviewData.getBusinessUnit(); float[] widthac = null; //Updated for Nuclear Energy Engineering Business Unit Requirement by Naveen if(!"Nuclear Energy Engineering".equalsIgnoreCase(businessUnit)){ actionTable = new Table(ReviewConstants.NINE,ReviewConstants.THREE); widthac = new float[ReviewConstants.NINE]; widthac[0] = ReviewConstants.MAGIC_DOTONE; widthac[1] = ReviewConstants.MAGIC_DOTONEZERO; widthac[2] = ReviewConstants.MAGIC_DOTTWOZERO; widthac[ReviewConstants.THREE] = ReviewConstants.MAGIC_DOTTWOZERO; widthac[ReviewConstants.FOUR] = ReviewConstants.MAGIC_DOTONEZERO; widthac[ReviewConstants.FIVE] = ReviewConstants.MAGIC_DOTONEZERO; widthac[ReviewConstants.SIX] = ReviewConstants.MAGIC_DOTONEZERO; widthac[ReviewConstants.SEVEN] = ReviewConstants.MAGIC_DOTONEZERO; widthac[ReviewConstants.EIGHT] = ReviewConstants.MAGIC_DOTONEZERO; }else{ actionTable = new Table(ReviewConstants.SIX,ReviewConstants.THREE); widthac = new float[ReviewConstants.SIX]; widthac[0] = ReviewConstants.MAGIC_DOTONE; widthac[1] = ReviewConstants.MAGIC_THREEZERO; widthac[2] = ReviewConstants.MAGIC_THREEZERO; widthac[ReviewConstants.THREE] = ReviewConstants.MAGIC_THREEZERO; widthac[ReviewConstants.FOUR] = ReviewConstants.MAGIC_DOTONEZERO; widthac[ReviewConstants.FIVE] = ReviewConstants.MAGIC_DOTONEZERO; } actionTable.setTableFitsPage(true); actionTable.setPadding(2); actionTable.setSpacing(0); actionTable.setWidth(ReviewConstants.MAGIC_ONEZEROZERO); actionTable.setWidths(widthac); actionTable.setBorderWidth(1); Cell accell = new Cell(new Paragraph(ReviewConstants.S_ACTIONID, new Font(Font.HELVETICA, fontSize, Font.BOLD))); accell.setHeader(true); actionTable.addCell(accell); if(!"Nuclear Energy Engineering".equalsIgnoreCase(businessUnit)){ accell = new Cell(new Paragraph(ReviewConstants.PDF_RT, new Font(Font.HELVETICA, fontSize, Font.BOLD))); accell.setHeader(true); actionTable.addCell(accell); } accell = new Cell(new Paragraph(ReviewConstants.S_REQA, new Font(Font.HELVETICA, fontSize, Font.BOLD))); accell.setHeader(true); actionTable.addCell(accell); accell = new Cell(new Paragraph(ReviewConstants.S_CLOSURE, new Font(Font.HELVETICA, fontSize, Font.BOLD))); accell.setHeader(true); actionTable.addCell(accell); accell = new Cell(new Paragraph(ReviewConstants.S_DISPOSITION, new Font(Font.HELVETICA, fontSize, Font.BOLD))); accell.setHeader(true); actionTable.addCell(accell); //added by santosh on 18 june actionTable.endHeaders(); document.add(actionTable); if(!"Nuclear Energy Engineering".equalsIgnoreCase(businessUnit)){ accell = new Cell(new Paragraph(ReviewConstants.S_DRB_REFERENCE, new Font( Font.HELVETICA, fontSize, Font.BOLD))); accell.setHeader(true); actionTable.addCell(accell); accell = new Cell(new Paragraph(ReviewConstants.S_DEADLINE, new Font( Font.HELVETICA, fontSize, Font.BOLD))); accell.setHeader(true); actionTable.addCell(accell); } accell = new Cell(new Paragraph(ReviewConstants.S_OWNER, new Font( Font.HELVETICA, fontSize, Font.BOLD))); accell.setHeader(true); actionTable.addCell(accell); accell = new Cell(new Paragraph(ReviewConstants.S_STATE, new Font( Font.HELVETICA, fontSize, Font.BOLD))); accell.setHeader(true); actionTable.addCell(accell); int acSize = 0; if (_actionList != null) { acSize = _actionList.size(); } for (int i = 0; i < acSize; i++) { _aiBean = (ActionItemData) _actionList.get(i); Cell adCell = new Cell(new Paragraph(_aiBean.getActionID(), new Font( Font.HELVETICA, ReviewConstants.MAGIC_EIGHT))); adCell.setHeader(false); actionTable.addCell(adCell); if(!"Nuclear Energy Engineering".equalsIgnoreCase(businessUnit)){ if (_aiBean.getActionItemType().equals("0")) { adCell = new Cell(new Paragraph("Normal", new Font(Font.HELVETICA, fontSize))); } else { adCell = new Cell(new Paragraph("Critical", new Font(Font.HELVETICA, fontSize))); } adCell.setHeader(false); actionTable.addCell(adCell); } adCell = new Cell(new Paragraph(_aiBean.getRequiredAction(), new Font(Font.HELVETICA, fontSize))); adCell.setHeader(false); actionTable.addCell(adCell); adCell = new Cell(new Paragraph(_aiBean.getClosureCriteria(), new Font(Font.HELVETICA, fontSize))); adCell.setHeader(false); actionTable.addCell(adCell); String drbLink = ReviewConstants.EMPTY; drbRefList = new ArrayList(); if (!DRUtils.isEmpty(_aiBean.getState()) && ((_aiBean.getState() .equalsIgnoreCase(ReviewConstants.DRAFT_BEGUN_STATE)) || (_aiBean.getState() .equalsIgnoreCase(ReviewConstants.SCOPE_PROPOSED)) || (_aiBean .getState() .equalsIgnoreCase(ReviewConstants.RES_PROPOSED)))) { drbLink = ReviewConstants.EMPTY; _aiBean.setDisposition(ReviewConstants.EMPTY); } else { drbRefList = _actionService.getDrbRefForPDF(_aiBean.getActionSeqID(), _connection); int drbRefCnt = 0; if (drbRefList != null) { drbRefCnt = drbRefList.size(); int j = 0; for (j = 0; j < drbRefCnt; j++) { LOG.info("drbRefList.get(j)" + drbRefList.get(j).toString()); if (j < (drbRefCnt - 1)) { drbLink += drbRefList.get(j).toString() + ReviewConstants.COMMA_SPACE; } else { drbLink += drbRefList.get(j).toString(); } } } } LOG.info("drbLink" + drbLink); adCell = new Cell(new Paragraph(_aiBean.getDisposition(), new Font(Font.HELVETICA, fontSize))); adCell.setHeader(false); actionTable.addCell(adCell); //Updated for Nuclear Energy Engineering Business Unit Requirement by Naveen if(!"Nuclear Energy Engineering".equalsIgnoreCase(businessUnit)){ adCell = new Cell(new Paragraph(drbLink, new Font( Font.HELVETICA, fontSize))); adCell.setHeader(false); actionTable.addCell(adCell); adCell = new Cell(new Paragraph(_aiBean.getDeadline(), new Font(Font.HELVETICA, fontSize))); adCell.setHeader(false); actionTable.addCell(adCell); } adCell = new Cell(new Paragraph(_aiBean.getActionItemOwnerName(), new Font(Font.HELVETICA, fontSize))); adCell.setHeader(false); actionTable.addCell(adCell); adCell = new Cell(new Paragraph(_aiBean.getState(), new Font(Font.HELVETICA, fontSize))); adCell.setHeader(false); actionTable.addCell(adCell); //added by santosh actionTable.endHeaders(); document.add(actionTable); // added by santosh end } /*Phrase headerPhrase = new Phrase(); Table headTab = (Table)actionTable.getElement(0, 5); headerPhrase.add(headTab); HeaderFooter printHeader = new HeaderFooter(headerPhrase,false); System.out.println("addHeader"); document.setHeader(printHeader); actionTable.setLastHeaderRow(1); actionTable.endHeaders(); document.add(actionTable);*/ // added by santosh actionTable.endHeaders(); document.add(actionTable); // added by santosh end section.add(actionTable); } catch (Exception e) { LOG.error("General Exception occured", e); } }

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  • GRAPH PROBLEM: find an algorithm to determine the shortest path from one point to another in a recta

    - by newba
    I'm getting such an headache trying to elaborate an appropriate algorithm to go from a START position to a EXIT position in a maze. For what is worth, the maze is rectangular, maxsize 500x500 and, in theory, is resolvable by DFS with some branch and bound techniques ... 10 3 4 7 6 3 3 1 2 2 1 0 2 2 2 4 2 2 5 2 2 1 3 0 2 2 2 2 1 3 3 4 2 3 4 4 3 1 1 3 1 2 2 4 2 2 1 Output: 5 1 4 2 Explanation: Our agent looses energy every time he gives a step and he can only move UP, DOWN, LEFT and RIGHT. Also, if the agent arrives with a remaining energy of zero or less, he dies, so we print something like "Impossible". So, in the input 10 is the initial agent's energy, 3 4 is the START position (i.e. column 3, line 4) and we have a maze 7x6. Think this as a kind of labyrinth, in which I want to find the exit that gives the agent a better remaining energy (shortest path). In case there are paths which lead to the same remaining energy, we choose the one which has the small number of steps, of course. I need to know if a DFS to a maze 500x500 in the worst case is feasible with these limitations and how to do it, storing the remaining energy in each step and the number of steps taken so far. The output means the agent arrived with remaining energy= 5 to the exit pos 1 4 in 2 steps. If we look carefully, in this maze it's also possible to exit at pos 3 1 (column 3, row 1) with the same energy but with 3 steps, so we choose the better one. With these in mind, can someone help me some code or pseudo-code? I have troubles working this around with a 2D array and how to store the remaining energy, the path (or number of steps taken)....

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  • Integration testing - Hibernate & DbUnit

    - by Marco
    Hi, I'm writing some integrations tests in JUnit. What happens here is that when i run all the tests together in a row (and not separately), the data persisted in the database always changes and the tests find unexpected data (inserted by the previous test) during their execution. I was thinking to use DbUnit, but i wonder if it resets the auto-increment index between each execution or not (because the tests also check the IDs of the persisted entities). Thanks M.

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  • Spring MVC Best Practice Handling Unrecoverable Exceptions In Controller

    - by jboyd
    When you have a controller that does logic with services and DAO's that may throw an unrecoverable exception, what is the best practice in dealing with those method calls? Currently an app I'm working on has very lengthy try catch methods that simply err.out exception messages, this doesn't seem very robust and I think that this code smells, is there any cookie cutter best practice for handling this in spring-mvc?

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  • Problem locating file in a classpath

    - by Gandalf StormCrow
    I'm trying to read in file content, ex : public void myMethod(){ FileInputStream fstream = new FileInputStream(fileLocation); // Get the object of DataInputStream DataInputStream in = new DataInputStream(fstream); BufferedReader br = new BufferedReader(new InputStreamReader(in)); String strLine; while ((strLine = br.readLine()) != null) { .... .... ..... end while end method And I have at the begining of the class body private String fileLocation; and at the end of a class I have a getter and setter for it. Now I'm trying inject this file location from spring inside bean from this class and I specify the init-method of this class. But I get error cannot find the specified file as if its not on a classpath but it is inside war file? I'm building the project with maven and I put file in src/main/resources This is the error I get when trying to read file : Error: src\main\resources\ids.txt (The system cannot find the path specified) That is when I tried this : FileInputStream fstream = new FileInputStream("src\\main\\resources\\ids.txt"); how to reference the properly from the classpath? EDIT When I edit my code according to @BalusC solution , here is how it looks but I still get null error : ClassLoader classLoader = Thread.currentThread().getContextClassLoader(); InputStream input = classLoader.getResourceAsStream("src/main/resources/ids.txt"); // Get the object of DataInputStream BufferedReader br = new BufferedReader(new InputStreamReader(input)); String strLine; while ((strLine = br.readLine()) != null) { .... .... ..... end while end method

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  • JDK 1.6 compatible with JDK 1.5??

    - by kojh
    Im having a compatible issue, my project is develop in JDK 1.6, but when i need to post it to a host domain, there is a issue where the host domain used JDK 1.5, how do i make my project compatible with JDK 1.5? thanks in advance

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  • Apache POI Comment Excel

    - by Marquinio
    I need to add a comment to an HSSF Cell in Excel. Everything works fine the very first time but if I open the same file and run the code again it corrupts the file. I've also noticed that I need to create a Drawing object on a Sheet only once: _sheet.createDrawingPatriarch(); If the line above gets executed more than once comments will not work. So has anyone tried adding comments to Cells, closing the file, opening the file again and trying to add more comments to different cells? The below code works but if I open the file again then comments are not added, plus the file gets corrupted!!! Is there a way to get the existing Drawing object from a Sheet? Any ideas appreciated. Thanks!! _drawing = (HSSFPatriarch) _sheet.createDrawingPatriarch(); Row row = _sheet.getRow(rowIndex_); Cell cell = row.getCell(0); CreationHelper factory = _workbook.getCreationHelper(); HSSFAnchor anchor = new HSSFClientAnchor(0, 0, 0, 0, (short)4, 2, (short)6, 5); org.apache.poi.ss.usermodel.Comment comment = _drawing.createComment(anchor); RichTextString str = factory.createRichTextString("Hello, World "+rowIndex_); comment.setString(str); cell.setCellComment(comment);

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  • Regarding Multiple Tab-Class

    - by Christine
    Hi! I've problem regarding GUI with one Menu and one Order Class. I've created a variable to store how many items have been selected in the Menu Class. private int totalSelected; The var totalSelected is live updated. It can be changed anytime depending on actionPerformed() function.(Exp: totalSelected will add up all the selected items) In the Order Class, how can I access to the live update variable totalSelected in order to retrieve the live update value? When I invoke getTotalSelected() function inside the Menu Class, I will only obtain a 0 value. Thanks for your help ^^!

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  • log4j vs. System.out.println - logger advantages?

    - by wishi_
    Hi! I'm newly using log4j in a project. A fellow programmer told me that using System.out.println is considered bas style and that log4j is something like standard for logging matters nowadays. We do lots of JUnit testing - System.out stuff turns out to be harder to test. Therefore I began utilizing log4j for a Console controller class, that's just handling commandline parameters. // some logger config org.apache.log4j.BasicConfigurator.configure(); Logger logger = LoggerFactory.getLogger(Console.class); Category cat = Category.getRoot(); Seems to work: logger.debug("String"); Produces: 1 [main] DEBUG project.prototype.controller.Console - String I got two questions regarding this: From my basic understanding using this logger should provide me comfortable options to write a logfile with timestamps - instead of spamming the console - if debug mode is enabled at the logger? Why is System.out.println harder to test? I searched stackoverflow and found a testing recipe. So I wonder what kind of advantage I really get by using log4j.

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  • How to store arrays in single array

    - by Jessy
    How can I store arrays in single array? e.g. I have four different arrays, I want to store it in single array int storeAllArray [] and when I call e.g. storeAllArray[1] , I will get this output [11,65,4,3,2,9,7]instead of single elements? int array1 [] = {1,2,3,4,5,100,200,400}; int array2 [] = {2,6,5,7,2,5,10}; int array3 [] = {11,65,4,3,2,9,7}; int array4 [] = {111,33,22,55,77}; int storeAllArray [] = {array1,array2,array3,array2} // I want store all array in on array for (int i=0; i<storeAllArray; i++){ System.out.println(storeAllArray.get[0]); // e.g. will produce --> 1,2,3,4,5,100,200,400 , how can I do this? }

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  • Postgresql 8.4 reading OID style BLOBs with Hibernate

    - by peter
    I am getting this weird case when querying Postgres 8.4 for some records with Blobs (of type OIDs) with Hibernate. The query does return all right but when my code wants to read the content of the BLOB with the simple code below, it gets 0 bytes back public static byte[] readBlob(Blob blob) throws Exception { InputStream is = null; try { is = blob.getBinaryStream(); return org.apache.commons.io.IOUtils.toByteArray(is); } finally { if (is != null) try { is.close(); } catch(Exception e) {} } } Funny think is that I am getting this behavior only since I've started adding more then one such records to the table. The underlying JDBC library is type 3 (postgresq 8.4-701). Can someone give me a hint as to how to solve this issue? Thanks Peter

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  • How to make a spam tester

    - by aquero
    In my project I need to make a spam tester to check the spam score of the mails prepared to be sent. When I searched, I found Spam Assassin, which they say is used as sapm filters in many mail servers. Can I create a spam tester using Spam Assassin? Another option I found is one Litmus API, which is a paid service. Is there any options other than these two? Freeware is more preferred. My project is a J2EE web application using Spring.

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  • Algorithm to compare people names to detect identicalness

    - by Pentium10
    I am working on address book synchronization algorithm. I would like to reuse some code if there exists, but couldn't find one yet. Does someone know about an algorithm that will tell me in numbers/float/procent how much two names are identical. Levenstein distance is not good in this approach, as names and our adddress books are matching the begining of each of the name sections. John Smith should match Smith Jon, Jonathan Smith, Johnny Smith

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