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  • Starting a career in quantitative finance

    - by Vitor Braga
    I've been reading John Hull book (Options, Futures and Other Derivatives) mostly on curiosity. I've read other books about financial markets in the past (like Elder's Trading for Living and the novel Reminiscences of a Stock Operator). But I'm really hooked by the John Hull book. My background is mostly scientific computing: number crunching, visualization and image processing. Mostly in C++, with some C, Fortran, Python, Ruby here and there. I've been thinking on moving on to quantitative finance - I'd like to do that. What would be the best way to start? Any tips?

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  • Strategies for porting application from Win32 API to GTK+

    - by Vitor Braga
    I have a legacy application written in C, using the raw Win32 API. The general level of abstraction is low and raw dependency on <windows.h> is common. I would like to port this application to GTK+. There are any kind of guidelines or best practices on how to do this? I've previously ported a MFC application to Qt, but the application was very abstracted - it draw it's own set of widgets, for example - and initial porting was very straightforward. I've been thinking at first using Wine to build a native Linux executable and then trying to slowly refactor it into a GTK+ app. Does some one have best practices or previous experiences to share about this?

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  • Wifi stops working in 13.10

    - by Vitor
    OK, my wifi is connecting fine, but it just stop downloading and uploading data. The skype stops, trying to reconnect, the firefox nighly and the google chromium stops loading pages and websites, everythings stops. But when I see the network icon: connected to my wifi. Then, I simply reconnect, or disconnect and connect again. Reconnecting, the wifi starts working again, the skype icon turns green, the browsers work again. Previously, I had 13.04 and never had this problem. When I upgraded to Ubuntu 13.10, the wifi started to do this. And the wifi has this problem since the early times of 13.10; since I installed 13.10, the wifi is having this issue (from the first day I installed it). Anyone having the same problem? Anyone knows how to fix it?

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  • How I can fix the "Display Driver has stopped responding and has recovered"?

    - by Vitor Rangel
    I'm using a GeForce GTX 580, with Windows 7 64-bit. The driver version of the GTX is 301.42. The problem happens after a few minutes, when I'm playing specifc games. It won't happen in all games - And I don't have any idea why these games doesn't work. The games that doesn't work: Battlefield 3, Civilization V, Sniper Elite V2. The games that work: Mass Effect 3, Crysis 2, Team Fortress 2, Left 4 Dead 2, Skyrim, L.A. Noire. As you can see, it's not a problem of "The games that demand more stop working". I've tryed updating the driver of the graphics-card, the bios of the motherboard, even formated my computer (It was needing it) and instaled every driver in the last version possible. This problem happens since I bought my graphics-card, 6 months ago. After a few minutes, from 10 to 20, the pixels in the monitor become strange, with random colors and effects, like it was broken. Then, everything goes black, and the message appears "Display Driver has stopped responding and has recovered". After that, I need to close the game and start again. I am not overclocking, and my temperature never goes higher than 70ºC.

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  • What framework for MVVM should I use?

    - by Rangel
    I am developing an application with the MVVM model, but I have reached a point where I need to choose which framework to use. Among the possible options are: MVVM Toolkit MVVM Foundation WPF Application Framework (WAF) Light MVVM Caliburn Cinch Prism In your experience, which is better?

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  • Server side method not getting called

    - by Rangel Fernandes
    From the below javascript code i am trying to call a serverside method, but serververside method is not getting called. I am using jquery, ajax <script type="text/javascript" src="JquryLib.js"></script> <script type="text/javascript" language="javascript"> function fnPopulateCities() { debugger; var State = $("#ddlState").val(); GetCities(State); return false; } function GetCities(StateId) { debugger; var v1 = 'StateId: ' + StateId; $.ajax( { type: "POST", url: 'DropDownList_Cascade.aspx/PopulateCities', data: '{' + v1 + '}', contentType: "application/json; charset=utf-8", dataType: "json", success: function (result) { if (result.status === "OK") { alert('Success!!'); } else { fnDisplayCities(result); } }, error: function (req, status, error) { alert("Sorry! Not able to retrieve cities"); } }); } </script> This is my serverside method which i need to call. private static ArrayList PopulateCities(int StateId) { //this code returns Cities ArrayList from database. } It is giving me the following error: 500 (Internal Server Error) I cannot figure out what is wrong. please help! Stack Trace: [ArgumentException: Unknown web method PopulateCities.Parameter name: methodName]

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  • Where can I find fellow developers who are looking for help to create a startup?

    - by Jeremy Child
    Where can I find fellow developers who are looking for help to create a startup? Are there any collaboration websites whereby people pitch ideas and a group of people 'join' the project in an effort to create some kind of prototype? Edit: @Vitor Braga - Seriously i'm not looking to make money, just finding developers who are interested in making a trivial little app with someone else. Edit: It may be worthy to explain that I live in a remote area of Australia.

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  • IP route ppp0 + eth0 access to outside network

    - by Vitor
    I need some help in define a route I have two connections one from eth0 and other a ppp0 (a 3G card) Not having the ppp0 connection active my route table is: Destination Gateway Genmask Flags Metric Ref Use Iface default DD-WRT 0.0.0.0 UG 100 0 0 eth0 192.168.1.0 * 255.255.255.0 U 0 0 0 eth0 I can access my webserver from an outside network through ethernet interface Than I have also my ppp0 3G connection active havig the following route table: D estination Gateway Genmask Flags Metric Ref Use Iface default 10.64.64.64 0.0.0.0 UG 0 0 0 ppp0 10.64.64.64 * 255.255.255.255 UH 0 0 0 ppp0 192.168.1.0 * 255.255.255.0 U 0 0 0 eth0 Now I only can access my webserver in outside networks through the IP of the 3G connection Note that my server is serving at 0.0.0.0 IP (to all interfaces) But I need to get access to webserver to both interfaces ethernet and 3G connection I only can have access to both connection in local network Any help to configure this network to have both interfaces with outside networks access is welcome Can anyone give me an example to configure this network with 2 gateways to give outside networks access One for IP 192.168.1.149 and other for the ppp0 IP 89.214.60.196 Tanks

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  • TFS 2012: Backup Plan Fails with empty log file

    - by Vitor
    I have a Team Foundation Server 2012 installation with Power Tools, and I defined a backup plan using the wizard found in the "Database Backup Tools" in the Team Foundation Server Administration Console. I set the backup plan to do a full database backup on Sunday mornings, to another server in the network. I followed the wizard with no problems and the Backup Plan was set successfully. However when the backup runs it returns Error as result and when I go to the log file I only get the header and no further info: [Info @01:00:01.078] ==================================================================== [Info @01:00:01.078] Team Foundation Server Administration Log [Info @01:00:01.078] Version : 11.0.50727.1 [Info @01:00:01.078] DateTime : 11/25/2012 02:00:01 [Info @01:00:01.078] Type : Full Backup Activity [Info @01:00:01.078] User : <backup user> [Info @01:00:01.078] Machine : <TFS Server> [Info @01:00:01.078] System : Microsoft Windows NT 6.2.9200.0 (AMD64) [Info @01:00:01.078] ==================================================================== I can imagine it's a permission problem, but I have no idea where to start ... Can anyone help? Thank you for your time! EDIT I'm not sure if it is related, but I logged in with "backup user" in "TFS Server" and there was this crash window opened with "TFS Power Tool Shell Extension (TfsComProviderSvr) has stopped working". The full crash log is here: Problem signature: Problem Event Name: APPCRASH Application Name: TfsComProviderSvr.exe Application Version: 11.0.50727.0 Application Timestamp: 5050cd2a Fault Module Name: StackHash_e8da Fault Module Version: 6.2.9200.16420 Fault Module Timestamp: 505aaa82 Exception Code: c0000374 Exception Offset: PCH_72_FROM_ntdll+0x00040DA8 OS Version: 6.2.9200.2.0.0.272.7 Locale ID: 1043 Additional Information 1: e8da Additional Information 2: e8dac447e1089515a72386afa6746972 Additional Information 3: d903 Additional Information 4: d9036f986c69f4492a70e4cf004fb44d Does it help? Thanks everyone!

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  • Windows Server 2003 port forwarding

    - by Vitor Braga
    Using the "netsh interface portproxy" I added a port forwarding to a Windows Server 2k3. The command "netsh interface portproxy show all" shows the added forwarding. On the other hand, any client connecting to the incoming port will receive a "connection refused" message. netstat also doesn't show the incoming port as listening. The machine firewall is disabled. There is any other way to setup port forwarding on Windows or debugging tips?

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  • jQuery selective hover

    - by Vitor
    Hello everyone, I'm trying to do a simple task with jQuery: I have a list of words which, when hovered, should fadeIn its corresponding image. For example: <a href="#" class="yellow">Yellow</a> <a href="#" class="blue">Blue</a> <a href="#" class="green">Green</a> <img src="yellow.jpg" class="yellow"> <img src="blue.jpg" class="blue"> <img src="green.jpg" class="green"> I'm currently doing it this way for each link/image: $('a.yellow').hover( function () { $('img.yellow').fadeIn('fast'); }, function () { $('img.yellow').fadeOut('fast'); }); The method above works fine, but as I'm still learning, I guess there's a better way to do that instead of repeating functions. Can anyone give me some light here? How can I improve this code?

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  • Setting up a button to trigger both modalPopupExtender and his Click Method

    - by Vitor Reis
    Hey guys, I have this modalPopupExtender, I want it to show a CheckBoxList with some data. I have set up a button to call both the method to fill the CheckBoxes and trigger the modalPopup (TargetControlID). they're all inside an UpdatePanel. with the right triggers. The problem is that when I click the button it shows the modalPopup but doesn't load the method to fill my CheckBoxes... Also, a linkButton inside the poup (linkButtonCheckAll) just closes the popup when clicked. When I remove the modalPopup the code works just fine and the list is loaded dinamically with the UpdatePanel. <asp:UpdatePanel ID="uppLote" runat="server"> <ContentTemplate> <ajaxToolkit:ModalPopupExtender ID="modalLote" runat="server" BehaviorID="popup" TargetControlID="buttonViewLote" PopupControlID="panelLote" /> <asp:Panel ID="panelLote" runat="server" CssClass="modalpopup"> <asp:LinkButton ID="linkButtonCheckAll" runat="server" Text="Check All Items" onclick="linkButtonCheckAll_Click"></asp:LinkButton> <asp:CheckBoxList ID="checkListLote" runat="server"> </asp:CheckBoxList> </asp:Panel> </ContentTemplate> <Triggers> <asp:AsyncPostBackTrigger ControlID="linkButtonViewLote" EventName="Click" /> <asp:AsyncPostBackTrigger ControlID="linkButtonCheckAll" EventName="Click" /> </Triggers> </asp:UpdatePanel> If I completely remove the modalPopupExtender, the code works fine, showing me the list I want with the method "linkButonViewLote_Click" (so, the problem is occurring due to the button triggering the modalPopupExtender is the same that I'm using to get my data, right? Any solutions?

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  • JPA 2 Criteria API: why is isNull being ignored when in conjunction with equal?

    - by Vítor Souza
    I have the following entity class (ID inherited from PersistentObjectSupport class): @Entity public class AmbulanceDeactivation extends PersistentObjectSupport implements Serializable { private static final long serialVersionUID = 1L; @Temporal(TemporalType.DATE) @NotNull private Date beginDate; @Temporal(TemporalType.DATE) private Date endDate; @Size(max = 250) private String reason; @ManyToOne @NotNull private Ambulance ambulance; /* Get/set methods, etc. */ } If I do the following query using the Criteria API: CriteriaBuilder cb = em.getCriteriaBuilder(); CriteriaQuery<AmbulanceDeactivation> cq = cb.createQuery(AmbulanceDeactivation.class); Root<AmbulanceDeactivation> root = cq.from(AmbulanceDeactivation.class); EntityType<AmbulanceDeactivation> model = root.getModel(); cq.where(cb.isNull(root.get(model.getSingularAttribute("endDate", Date.class)))); return em.createQuery(cq).getResultList(); I get the following SQL printed in the log: FINE: SELECT ID, REASON, ENDDATE, UUID, BEGINDATE, VERSION, AMBULANCE_ID FROM AMBULANCEDEACTIVATION WHERE (ENDDATE IS NULL) However, if I change the where() line in the previous code to this one: cq.where(cb.isNull(root.get(model.getSingularAttribute("endDate", Date.class))), cb.equal(root.get(model.getSingularAttribute("ambulance", Ambulance.class)), ambulance)); I get the following SQL: FINE: SELECT ID, REASON, ENDDATE, UUID, BEGINDATE, VERSION, AMBULANCE_ID FROM AMBULANCEDEACTIVATION WHERE (AMBULANCE_ID = ?) That is, the isNull criterion is totally ignored. It is as if it wasn't even there (if I provide only the equal criterion to the where() method I get the same SQL printed). Why is that? Is it a bug or am I missing something?

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  • Change panel "visible" property on MasterPage from Child pages

    - by Vitor Reis
    I want to show some panel with a label that is located on a MasterPage from inside it's child pages.. I already did the coding on the MasterPage: public class MyMaster : MasterPage { public void ShowPanel(string pMessage) { labelInside.Text = pMessage; myPanel.visible = true; } } Then I make the calls from child pages: public void ShowPanel(string pMessage) { MyMaster masterPage = this.Master as MyMaster; masterPage.ShowPanel(pMessage); } This "works" ok, but it won't show nothing, since I need the page to be "refreshed" in an "ajax-way" like an UpdatePanel, which I can't use because the Trigger is in another page, right? I really need this to work.. even if you have another completely different way to do this, I would appreciate.

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  • Converting WCF web service to Java

    - by Vitor Py
    I currently have a web service built on WCF. It's still in its infancy, so, major changes are still possible. I've been thinking on porting it from WCF to a Java-based solution since I'd like to have a Linux-based backend. What would be the best way to accomplish this "conversion"? Any advantages WCF may have that Java lacks?

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  • Stuck with jQuery thumbnail gallery behavior

    - by Vitor
    Hi everyone, I'm trying to create a simple thumbnail viewer with jQuery. Here goes the code: $(function(){ $("ul.thumbnails li").click(function(e){ var imgAlt = $(this).find('img').attr("alt"); //Get Alt Tag of Image var imgTitle = $(this).find('a').attr("href"); //Get Main Image URL $("img.featured").attr({ src: imgTitle , alt: imgAlt}); //Switch the main image (URL + alt tag) }); <div class="image-gallery"> <img class="featured" src="big.jpg"> <ul class="thumbnails"> <li id="thumb01"> <a href="big.jpg"><img src="small.jpg"></a> </li> <li id="thumb02"> <a href="big.jpg"><img src="small.jpg"></a> </li> <li id="thumb03"> <a href="big.jpg"><img src="small.jpg"></a> </li> </ul> .thumbnails li { margin: 0; padding: 5px 5px 0 5px; list-style: none; float: left; overflow: hidden; } thumbnails li img { width: 50px; height: 50px; margin: 0; padding: 0; float: left; } If i click the thumbnail, the browser goes straight to the full image instead of just changing the img src with jQuery. But I if i click somewhere inside the <li> it works. I know this must be simple, but I don't know where I'm going wrong. I've tried studying other galleries, like http://www.sohtanaka.com/web-design/examples/image-rotator/ , but couldn't find what I'm missing. I could really use some help from you guys :)

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  • Adding search for a private website

    - by Vitor Py
    I have a login-protected website. It's an internal application and it's not avaiable to the general public hence it's not indexed by any search engine. My application is developed on the Google App Engine. I would like to add a search engine but obviously without the need to public index it. There's any solution avaiable from Google/Bing/Others for a situation like this? Have you done this before? What solution did you chose and what are yours results?

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  • Drawing on top of every windows on X11

    - by Vítor Baptista
    Hi, I am trying to make an arcade machine. The user will purchase credits, which will allow him to play for X minutes. I want to write "9:42 minutes left" at the left corner of the screen, even if he's playing a full screen game (UrbanTerror, for example). I would really like if I could do this with Ruby, but any other language is OK. Any ideas? Thanks in advance.

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  • Call (show) a modal popup located in MasterPage from it's childs

    - by Vitor Reis
    I'm trying to make a default modal box that must be accessible from any part of the application, and need to be called whenever I want from inside any page. (must be called from code-behind). So I came up with the idea of a Panel + modalPopupExtender placed in the MasterPage, and calling it from child pages via code-behind. How can I do that? Or perhaps you guys have a better idea to solve this.

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  • Oracle Database 11g Implementation Specialist - 14 a 16 Março, 2011

    - by Claudia Costa
    OPN Bootcamp Curso de Especialização em Software OracleCaro Parceiro, O novo programa de parcerias da Oracle assenta na Especialização dos seus seus parceiros. No último ano fiscal muitos parceiros já iniciaram as suas especializações nas temáticas a que estão dedicados e que são prioritárias para o seu negócio. Para apoiar o esforço e dedicação de muitos parceiros na obtenção da certificação dos seus recursos, a equipa local de alianças e canal lançou uma série de iniciativas. Entre elas, a criação deste OPN Bootcamp em conjunto com a Oracle University, especialmente dedicado à formação e preparação para os exames de Implementation, obrigatórios para obter a especialização Oracle Database 11g. Este curso de formação tem o objectivo de preparar os parceiros para o exame de Implementation a realizar já no dia 29 de Março, durante o OPN Satellite Event que terá lugar em Lisboa (outros detalhes sobre este evento serão brevemente comunicados). A sua presença neste curso de preparação nas datas que antecedem o evento OPN Satellite, é fundamental para que os seus técnicos fiquem habilitados a realizar o exame dia 29 de Março com a máxima capacidade e possibilidade de obter resultados positivos. Deste modo, no dia 29 de Março, podem obter a tão desejada certificação, com custos de exame 100% suportados pela Oracle. Contamos com a sua presença! Conteúdo: Oracle Database 11g: 2 Day DBA Release 2 + preparação para o exame 1Z0-154 Oracle Database 11g: Essentials Audiência: - Database Administrators - Technical Administrator- Technical Consultant- Support Engineer Pré Requisitos: Conhecimentos sobre sistema operativo Linux Duração: 3 dias + exame (1 dia)Horário: 9h00 / 18h00Data: 14 a 16 de Março Local: Centro de Formação Oracle Pessoas e Processos Rua do Conde Redondo, 145 - 1º - LisboaAcesso: Metro do Marquês de Pombal Custos de participação: 140€ pax/dia = 420€/pax (3 dias)* - Este preço inclui o exame de Implementation *Custo final para parceiro. Já inclui financiamento da equipa de Alianças e Canal Data e Local do Exame: 29 de Março - Instalações da Oracle University _______________________________________________________________________________________ Inscrições Gratuitas. Lugares Limitados.Reserve já o seu lugar : Email   Para mais informações sobre inscrição: Vítor PereiraFixo: 21 778 38 39 Móvel: 933777099 Fax: 21 778 38 40Para outras informações, por favor contacte: Claudia Costa / 21 423 50 27

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  • Calculating the Size (in Bytes and MB) of a Oracle Coherence Cache

    - by Ricardo Ferreira
    The concept and usage of data grids are becoming very popular in this days since this type of technology are evolving very fast with some cool lead products like Oracle Coherence. Once for a while, developers need an programmatic way to calculate the total size of a specific cache that are residing in the data grid. In this post, I will show how to accomplish this using Oracle Coherence API. This example has been tested with 3.6, 3.7 and 3.7.1 versions of Oracle Coherence. To start the development of this example, you need to create a POJO ("Plain Old Java Object") that represents a data structure that will hold user data. This data structure will also create an internal fat so I call that should increase considerably the size of each instance in the heap memory. Create a Java class named "Person" as shown in the listing below. package com.oracle.coherence.domain; import java.io.Serializable; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Random; @SuppressWarnings("serial") public class Person implements Serializable { private String firstName; private String lastName; private List<Object> fat; private String email; public Person() { generateFat(); } public Person(String firstName, String lastName, String email) { setFirstName(firstName); setLastName(lastName); setEmail(email); generateFat(); } private void generateFat() { fat = new ArrayList<Object>(); Random random = new Random(); for (int i = 0; i < random.nextInt(18000); i++) { HashMap<Long, Double> internalFat = new HashMap<Long, Double>(); for (int j = 0; j < random.nextInt(10000); j++) { internalFat.put(random.nextLong(), random.nextDouble()); } fat.add(internalFat); } } public String getFirstName() { return firstName; } public void setFirstName(String firstName) { this.firstName = firstName; } public String getLastName() { return lastName; } public void setLastName(String lastName) { this.lastName = lastName; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } } Now let's create a Java program that will start a data grid into Coherence and will create a cache named "People", that will hold people instances with sequential integer keys. Each person created in this program will trigger the execution of a custom constructor created in the People class that instantiates an internal fat (the random amount of data generated to increase the size of the object) for each person. Create a Java class named "CreatePeopleCacheAndPopulateWithData" as shown in the listing below. package com.oracle.coherence.demo; import com.oracle.coherence.domain.Person; import com.tangosol.net.CacheFactory; import com.tangosol.net.NamedCache; public class CreatePeopleCacheAndPopulateWithData { public static void main(String[] args) { // Asks Coherence for a new cache named "People"... NamedCache people = CacheFactory.getCache("People"); // Creates three people that will be putted into the data grid. Each person // generates an internal fat that should increase its size in terms of bytes... Person pessoa1 = new Person("Ricardo", "Ferreira", "[email protected]"); Person pessoa2 = new Person("Vitor", "Ferreira", "vitor[email protected]"); Person pessoa3 = new Person("Vivian", "Ferreira", "[email protected]"); // Insert three people at the data grid... people.put(1, pessoa1); people.put(2, pessoa2); people.put(3, pessoa3); // Waits for 5 minutes until the user runs the Java program // that calculates the total size of the people cache... try { System.out.println("---> Waiting for 5 minutes for the cache size calculation..."); Thread.sleep(300000); } catch (InterruptedException ie) { ie.printStackTrace(); } } } Finally, let's create a Java program that, using the Coherence API and JMX, will calculate the total size of each cache that the data grid is currently managing. The approach used in this example was retrieve every cache that the data grid are currently managing, but if you are interested on an specific cache, the same approach can be used, you should only filter witch cache will be looked for. Create a Java class named "CalculateTheSizeOfPeopleCache" as shown in the listing below. package com.oracle.coherence.demo; import java.text.DecimalFormat; import java.util.Map; import java.util.Set; import java.util.TreeMap; import javax.management.MBeanServer; import javax.management.MBeanServerFactory; import javax.management.ObjectName; import com.tangosol.net.CacheFactory; public class CalculateTheSizeOfPeopleCache { @SuppressWarnings({ "unchecked", "rawtypes" }) private void run() throws Exception { // Enable JMX support in this Coherence data grid session... System.setProperty("tangosol.coherence.management", "all"); // Create a sample cache just to access the data grid... CacheFactory.getCache(MBeanServerFactory.class.getName()); // Gets the JMX server from Coherence data grid... MBeanServer jmxServer = getJMXServer(); // Creates a internal data structure that would maintain // the statistics from each cache in the data grid... Map cacheList = new TreeMap(); Set jmxObjectList = jmxServer.queryNames(new ObjectName("Coherence:type=Cache,*"), null); for (Object jmxObject : jmxObjectList) { ObjectName jmxObjectName = (ObjectName) jmxObject; String cacheName = jmxObjectName.getKeyProperty("name"); if (cacheName.equals(MBeanServerFactory.class.getName())) { continue; } else { cacheList.put(cacheName, new Statistics(cacheName)); } } // Updates the internal data structure with statistic data // retrieved from caches inside the in-memory data grid... Set<String> cacheNames = cacheList.keySet(); for (String cacheName : cacheNames) { Set resultSet = jmxServer.queryNames( new ObjectName("Coherence:type=Cache,name=" + cacheName + ",*"), null); for (Object resultSetRef : resultSet) { ObjectName objectName = (ObjectName) resultSetRef; if (objectName.getKeyProperty("tier").equals("back")) { int unit = (Integer) jmxServer.getAttribute(objectName, "Units"); int size = (Integer) jmxServer.getAttribute(objectName, "Size"); Statistics statistics = (Statistics) cacheList.get(cacheName); statistics.incrementUnit(unit); statistics.incrementSize(size); cacheList.put(cacheName, statistics); } } } // Finally... print the objects from the internal data // structure that represents the statistics from caches... cacheNames = cacheList.keySet(); for (String cacheName : cacheNames) { Statistics estatisticas = (Statistics) cacheList.get(cacheName); System.out.println(estatisticas); } } public MBeanServer getJMXServer() { MBeanServer jmxServer = null; for (Object jmxServerRef : MBeanServerFactory.findMBeanServer(null)) { jmxServer = (MBeanServer) jmxServerRef; if (jmxServer.getDefaultDomain().equals(DEFAULT_DOMAIN) || DEFAULT_DOMAIN.length() == 0) { break; } jmxServer = null; } if (jmxServer == null) { jmxServer = MBeanServerFactory.createMBeanServer(DEFAULT_DOMAIN); } return jmxServer; } private class Statistics { private long unit; private long size; private String cacheName; public Statistics(String cacheName) { this.cacheName = cacheName; } public void incrementUnit(long unit) { this.unit += unit; } public void incrementSize(long size) { this.size += size; } public long getUnit() { return unit; } public long getSize() { return size; } public double getUnitInMB() { return unit / (1024.0 * 1024.0); } public double getAverageSize() { return size == 0 ? 0 : unit / size; } public String toString() { StringBuffer sb = new StringBuffer(); sb.append("\nCache Statistics of '").append(cacheName).append("':\n"); sb.append(" - Total Entries of Cache -----> " + getSize()).append("\n"); sb.append(" - Used Memory (Bytes) --------> " + getUnit()).append("\n"); sb.append(" - Used Memory (MB) -----------> " + FORMAT.format(getUnitInMB())).append("\n"); sb.append(" - Object Average Size --------> " + FORMAT.format(getAverageSize())).append("\n"); return sb.toString(); } } public static void main(String[] args) throws Exception { new CalculateTheSizeOfPeopleCache().run(); } public static final DecimalFormat FORMAT = new DecimalFormat("###.###"); public static final String DEFAULT_DOMAIN = ""; public static final String DOMAIN_NAME = "Coherence"; } I've commented the overall example so, I don't think that you should get into trouble to understand it. Basically we are dealing with JMX. The first thing to do is enable JMX support for the Coherence client (ie, an JVM that will only retrieve values from the data grid and will not integrate the cluster) application. This can be done very easily using the runtime "tangosol.coherence.management" system property. Consult the Coherence documentation for JMX to understand the possible values that could be applied. The program creates an in memory data structure that holds a custom class created called "Statistics". This class represents the information that we are interested to see, which in this case are the size in bytes and in MB of the caches. An instance of this class is created for each cache that are currently managed by the data grid. Using JMX specific methods, we retrieve the information that are relevant for calculate the total size of the caches. To test this example, you should execute first the CreatePeopleCacheAndPopulateWithData.java program and after the CreatePeopleCacheAndPopulateWithData.java program. The results in the console should be something like this: 2012-06-23 13:29:31.188/4.970 Oracle Coherence 3.6.0.4 <Info> (thread=Main Thread, member=n/a): Loaded operational configuration from "jar:file:/E:/Oracle/Middleware/oepe_11gR1PS4/workspace/calcular-tamanho-cache-coherence/lib/coherence.jar!/tangosol-coherence.xml" 2012-06-23 13:29:31.219/5.001 Oracle Coherence 3.6.0.4 <Info> (thread=Main Thread, member=n/a): Loaded operational overrides from "jar:file:/E:/Oracle/Middleware/oepe_11gR1PS4/workspace/calcular-tamanho-cache-coherence/lib/coherence.jar!/tangosol-coherence-override-dev.xml" 2012-06-23 13:29:31.219/5.001 Oracle Coherence 3.6.0.4 <D5> (thread=Main Thread, member=n/a): Optional configuration override "/tangosol-coherence-override.xml" is not specified 2012-06-23 13:29:31.266/5.048 Oracle Coherence 3.6.0.4 <D5> (thread=Main Thread, member=n/a): Optional configuration override "/custom-mbeans.xml" is not specified Oracle Coherence Version 3.6.0.4 Build 19111 Grid Edition: Development mode Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. 2012-06-23 13:29:33.156/6.938 Oracle Coherence GE 3.6.0.4 <Info> (thread=Main Thread, member=n/a): Loaded Reporter configuration from "jar:file:/E:/Oracle/Middleware/oepe_11gR1PS4/workspace/calcular-tamanho-cache-coherence/lib/coherence.jar!/reports/report-group.xml" 2012-06-23 13:29:33.500/7.282 Oracle Coherence GE 3.6.0.4 <Info> (thread=Main Thread, member=n/a): Loaded cache configuration from "jar:file:/E:/Oracle/Middleware/oepe_11gR1PS4/workspace/calcular-tamanho-cache-coherence/lib/coherence.jar!/coherence-cache-config.xml" 2012-06-23 13:29:35.391/9.173 Oracle Coherence GE 3.6.0.4 <D4> (thread=Main Thread, member=n/a): TCMP bound to /192.168.177.133:8090 using SystemSocketProvider 2012-06-23 13:29:37.062/10.844 Oracle Coherence GE 3.6.0.4 <Info> (thread=Cluster, member=n/a): This Member(Id=2, Timestamp=2012-06-23 13:29:36.899, Address=192.168.177.133:8090, MachineId=55685, Location=process:244, Role=Oracle, Edition=Grid Edition, Mode=Development, CpuCount=2, SocketCount=2) joined cluster "cluster:0xC4DB" with senior Member(Id=1, Timestamp=2012-06-23 13:29:14.031, Address=192.168.177.133:8088, MachineId=55685, Location=process:1128, Role=CreatePeopleCacheAndPopulateWith, Edition=Grid Edition, Mode=Development, CpuCount=2, SocketCount=2) 2012-06-23 13:29:37.172/10.954 Oracle Coherence GE 3.6.0.4 <D5> (thread=Cluster, member=n/a): Member 1 joined Service Cluster with senior member 1 2012-06-23 13:29:37.188/10.970 Oracle Coherence GE 3.6.0.4 <D5> (thread=Cluster, member=n/a): Member 1 joined Service Management with senior member 1 2012-06-23 13:29:37.188/10.970 Oracle Coherence GE 3.6.0.4 <D5> (thread=Cluster, member=n/a): Member 1 joined Service DistributedCache with senior member 1 2012-06-23 13:29:37.188/10.970 Oracle Coherence GE 3.6.0.4 <Info> (thread=Main Thread, member=n/a): Started cluster Name=cluster:0xC4DB Group{Address=224.3.6.0, Port=36000, TTL=4} MasterMemberSet ( ThisMember=Member(Id=2, Timestamp=2012-06-23 13:29:36.899, Address=192.168.177.133:8090, MachineId=55685, Location=process:244, Role=Oracle) OldestMember=Member(Id=1, Timestamp=2012-06-23 13:29:14.031, Address=192.168.177.133:8088, MachineId=55685, Location=process:1128, Role=CreatePeopleCacheAndPopulateWith) ActualMemberSet=MemberSet(Size=2, BitSetCount=2 Member(Id=1, Timestamp=2012-06-23 13:29:14.031, Address=192.168.177.133:8088, MachineId=55685, Location=process:1128, Role=CreatePeopleCacheAndPopulateWith) Member(Id=2, Timestamp=2012-06-23 13:29:36.899, Address=192.168.177.133:8090, MachineId=55685, Location=process:244, Role=Oracle) ) RecycleMillis=1200000 RecycleSet=MemberSet(Size=0, BitSetCount=0 ) ) TcpRing{Connections=[1]} IpMonitor{AddressListSize=0} 2012-06-23 13:29:37.891/11.673 Oracle Coherence GE 3.6.0.4 <D5> (thread=Invocation:Management, member=2): Service Management joined the cluster with senior service member 1 2012-06-23 13:29:39.203/12.985 Oracle Coherence GE 3.6.0.4 <D5> (thread=DistributedCache, member=2): Service DistributedCache joined the cluster with senior service member 1 2012-06-23 13:29:39.297/13.079 Oracle Coherence GE 3.6.0.4 <D4> (thread=DistributedCache, member=2): Asking member 1 for 128 primary partitions Cache Statistics of 'People': - Total Entries of Cache -----> 3 - Used Memory (Bytes) --------> 883920 - Used Memory (MB) -----------> 0.843 - Object Average Size --------> 294640 I hope that this post could save you some time when calculate the total size of Coherence cache became a requirement for your high scalable system using data grids. See you!

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  • Search option: jqGrid + PHP

    - by Felix Guerrero
    Hi, I'm trying to get work this code: $("#list").jqGrid({ url: 'docente.php', datatype: 'json', mtype: 'POST', postData: {c : "", n: "", a: "", d: "", t: "", e: "", f: "", g: $('#selectD').value(), p: "", call: "report"}, colNames: ['C&eacute;dula','Nombres', 'Apellidos', 'Direcci&oacute;n', 'E-mail','Tel&eacute;fono', 'Profesi&oacute;n'], colModel: [ { name:'rows.cedula', index: 'cedula', search:true, jsonmap: 'cedula', width: 150, align: 'left', sortable:true}, { name:'rows.nombre', index: 'nombre', jsonmap: 'nombre', width: 150, align: 'left'}, { name:'rows.apellido', index: 'apellido', jsonmap: 'apellido', width: 240, align: 'left'}, { name:'rows.direccion', index: 'direccion', jsonmap: 'direccion', width: 330, align: 'left'}, { name:'rows.email', index: 'email', jsonmap: 'email',width: 200, align: 'left'}, { name:'rows.telefono', index: 'telefono', jsonmap: 'telefono', width: 170, align: 'left'}, { name:'rows.descripcion_profesion', index: 'descripcion_profesion', jsonmap: 'descripcion_profesion',width: 120, align: 'left'}], pager: '#pager', rowNum: 8, autowidth: true, rowList: [10, 20], sortname: 'cedula', sortorder: 'asc', viewrecords: true, caption: 'Docentes', jsonReader : { root: "rows", repeatitems: false }, height: 350, width: 900 }); $("#list").jqGrid('navGrid','#pager',{search:true, searchtext: "buscar",edit:false,add:false,del:false}); The HMTL I'm using: <div id="reporte"> <table id="list"></table> <div id="pager"> </div> <div> And the PHP code: $total_pages = 0; $limit=10; $count = Profesor::CountAll(); if($count> 0) $total_pages= ceil($count/$limit); else $total_pages=0; $cnx = new PDO("mysql:host=localhost;dbname=appsms","root",""); $rows = array(); $strQuery="select cedula, nombre, apellido, direccion, telefono, email, descripcion_profesion from Profesor join Profesion on " . " (profesor.profesion_id = profesion.id) and (profesor.grado_id_grado = '" .$this->grado . "') order by cedula;"; $stmt = $cnx->prepare($strQuery); $stmt->execute(array("reporte")); $rows = $stmt->fetchAll(PDO::FETCH_ASSOC); $response->page = 1; $response->total= $total_pages; $response->records = sizeof($rows); $i=0; foreach($rows as $result){ $response->rows[$i] = $result; $i++; } echo json_encode($response); The JSON I get: {"page":1,"total":1,"records":2, "rows":[{"cedula":"v-108984103","nombre":"Soneia","apellido":"Rond\u00f3n Contreras","direccion":"El Rosal, calle 2-44","telefono":"04544247008457","email":"[email protected]","descripcion_profesion":"Docente"}, {"cedula":"v-135254741","nombre":"Judith","apellido":"Rangel M\u00e1rquez","direccion":"Sabaneta","telefono":"04247644152499","email":"","descripcion_profesion":"Docente"}]} It loads the query from PHP but the search option doesn't work neither the sorting function on "cedula"'s column. What I need to do?. Thanks in advance.

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