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• Getting NoClassdef on HMAC_SHA1 in Webpshere

  - by defjab

  We have WAS 6.0 (I know) .2.43 ND running in multiple regions. Our Dev-B region runs fine, but Dev-C throws a java exception when we make web-calls (at least this is what the developer tells me)...Same code in both regions and I checked the obvious suspects (Global security, SSL ciphers etc) and they all seem to match. Here's the stack trace from SystemErr: [8/1/12 4:02:31:758 EDT] 0000005c ServletWrappe E SRVE0068E: Could not invoke the service() method on servlet action. Exception thrown : java.lang.NoClassDefFoundError at javax.crypto.Mac.getInstance(DashoA12275) at net.oauth.signature.HMAC_SHA1.computeSignature(HMAC_SHA1.java:73) at net.oauth.signature.HMAC_SHA1.getSignature(HMAC_SHA1.java:39) at net.oauth.signature.OAuthSignatureMethod.getSignature(OAuthSignatureMethod.java:83) at net.oauth.signature.OAuthSignatureMethod.sign(OAuthSignatureMethod.java:54) at com.harcourt.hsp.utils.LTIUtil.generateSignature(LTIUtil.java:62) at com.harcourt.hsp.web.struts.lti.action.BaseLTIAction.generateSignature(BaseLTIAction.java:238) at com.harcourt.hsp.web.struts.lti.action.BaseLTIAction.execute(BaseLTIAction.java:96) at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:106) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:743) at javax.servlet.http.HttpServlet.service(HttpServlet.java:856) at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1796) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:887) at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:90) at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:1937) at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:130) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:434) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:373) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:253) at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminaters(NewConnectionInitialReadCallback.java:207) at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:109) at com.ibm.ws.tcp.channel.impl.WorkQueueManager.requestComplete(WorkQueueManager.java:566) at com.ibm.ws.tcp.channel.impl.WorkQueueManager.attemptIO(WorkQueueManager.java:619) at com.ibm.ws.tcp.channel.impl.WorkQueueManager.workerRun(WorkQueueManager.java:952) at com.ibm.ws.tcp.channel.impl.WorkQueueManager$Worker.run(WorkQueueManager.java:1039) at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1498) at javax.crypto.Mac.getInstance(DashoA12275) at net.oauth.signature.HMAC_SHA1.computeSignature(HMAC_SHA1.java:73) at net.oauth.signature.HMAC_SHA1.getSignature(HMAC_SHA1.java:39) at net.oauth.signature.OAuthSignatureMethod.getSignature(OAuthSignatureMethod.java:83) at net.oauth.signature.OAuthSignatureMethod.sign(OAuthSignatureMethod.java:54) at com.harcourt.hsp.utils.LTIUtil.generateSignature(LTIUtil.java:62) at com.harcourt.hsp.web.struts.lti.action.BaseLTIAction.generateSignature(BaseLTIAction.java:238) at com.harcourt.hsp.web.struts.lti.action.BaseLTIAction.execute(BaseLTIAction.java:96) at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:106) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:743) at javax.servlet.http.HttpServlet.service(HttpServlet.java:856) at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1796) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:887) at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:90) at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:1937) at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:130) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:434) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:373) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:253) at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminaters(NewConnectionInitialReadCallback.java:207) at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:109) at com.ibm.ws.tcp.channel.impl.WorkQueueManager.requestComplete(WorkQueueManager.java:566) at com.ibm.ws.tcp.channel.impl.WorkQueueManager.attemptIO(WorkQueueManager.java:619) at com.ibm.ws.tcp.channel.impl.WorkQueueManager.workerRun(WorkQueueManager.java:952) at com.ibm.ws.tcp.channel.impl.WorkQueueManager$Worker.run(WorkQueueManager.java:1039) at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1498) Thanks for your help. I'm sure it's a config that I'm missing.

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• Deploying an EAR to JBOSS times out (org.rhq.core.pc.inventory.TimeoutException:)

  - by rangalo

  Hi, I am trying to deploy an ear file to JBOSS AS (defalut server). The application is the mavenised version of examples of SeamInAction book. When I copy the file to $JBOSS_HOME/server/default/deploy, I don't get any exception but the application doesn't respond, after some time trying to access the application from the browser gives following in the log... While deploying with admin-console (http://localhost:8080/admin-console) I get following error messgae: PS: After this Jboss gets into unusable state. I cannot even access admin-console. I just have to kill it. ErrorMessage in admin-console: Failed to create Resource Open18.ear - cause: org.rhq.core.pc.inventory.TimeoutException: Call to [org.rhq.plugins.jbossas5.ApplicationServerComponent.createResource()] with args [[CreateResourceReport: ResourceType=[ResourceType[id=0, category=Service, name=Enterprise Application (EAR), plugin=JBossAS5]], ResourceKey=[null]]] timed out. Invocation thread will be interrupted at org.rhq.core.pc.inventory.ResourceContainer$ResourceComponentInvocationHandler.invokeInNewThreadWithLock(ResourceContainer.java:437) at org.rhq.core.pc.inventory.ResourceContainer$ResourceComponentInvocationHandler.invoke(ResourceContainer.java:406) at $Proxy266.createResource(Unknown Source) at org.rhq.core.pc.inventory.CreateResourceRunner.call(CreateResourceRunner.java:113) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) Error Logs: 4:08:58,555 INFO [TableMetadata] foreign keys: [fkaf42e01ba13c3380, fk_course_ref_facility] 14:08:58,555 INFO [TableMetadata] indexes: [course_pkey] 14:08:58,645 INFO [TableMetadata] table found: public.facility 14:08:58,645 INFO [TableMetadata] columns: [zip, phone, state, type, uri, city, country, id, price_range, address, county, description, nam e] 14:08:58,645 INFO [TableMetadata] foreign keys: [] 14:08:58,645 INFO [TableMetadata] indexes: [facility_pkey] 14:08:58,705 INFO [TableMetadata] table found: public.hole 14:08:58,705 INFO [TableMetadata] columns: [id, m_par, l_handicap, name, l_par, number, course_id, m_handicap] 14:08:58,705 INFO [TableMetadata] foreign keys: [fk_hole_ref_course, fk30f4c09c3f1200] 14:08:58,705 INFO [TableMetadata] indexes: [hole_pkey, uniq_hole_number] 14:08:58,764 INFO [TableMetadata] table found: public.tee 14:08:58,764 INFO [TableMetadata] columns: [hole_id, distance, tee_set_id] 14:08:58,764 INFO [TableMetadata] foreign keys: [fk1c014f8de7677, fk_tee_ref_hole, fk1c014c69de560, fk_tee_ref_tee_set] 14:08:58,764 INFO [TableMetadata] indexes: [tee_pkey] 14:08:58,826 INFO [TableMetadata] table found: public.tee_set 14:08:58,826 INFO [TableMetadata] columns: [id, color, m_slope_rating, l_slope_rating, name, course_id, m_course_rating, l_course_rating, p os] 14:08:58,826 INFO [TableMetadata] foreign keys: [fk_tee_set_ref_course, fkaa6881b79c3f1200] 14:08:58,826 INFO [TableMetadata] indexes: [tee_set_pkey, uniq_tee_set_pos, uniq_tee_set_color] 14:08:58,827 INFO [SchemaUpdate] schema update complete 14:08:58,829 INFO [NamingHelper] JNDI InitialContext properties:{java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory, java. naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces} 14:08:58,850 INFO [TomcatDeployment] deploy, ctxPath=/Open18 14:15:53,969 WARN [DiscoveryComponentProxyFactory] The discovery component for resource type [ResourceType[id=0, category=Service, name=Connector, plugin=JBossAS5]] has been blacklisted 14:15:53,970 WARN [InventoryManager] Failure during discovery for [Connector] Resources - failed after 300002 ms. org.rhq.core.pc.inventory.TimeoutException: Call to [org.rhq.plugins.jbossas5.ConnectorDiscoveryComponent.discoverResources()] with args [[org.rhq.core.pluginapi.inventory.ResourceDiscoveryContext@96db1]] timed out. Invocation thread will be interrupted at org.rhq.core.pc.util.DiscoveryComponentProxyFactory$ResourceDiscoveryComponentInvocationHandler.invokeInNewThread(DiscoveryComponentProxyFactory.java:208) at org.rhq.core.pc.util.DiscoveryComponentProxyFactory$ResourceDiscoveryComponentInvocationHandler.invoke(DiscoveryComponentProxyFactory.java:181) at $Proxy249.discoverResources(Unknown Source) at org.rhq.core.pc.inventory.InventoryManager.invokeDiscoveryComponent(InventoryManager.java:272) at org.rhq.core.pc.inventory.InventoryManager.executeComponentDiscovery(InventoryManager.java:1697) at org.rhq.core.pc.inventory.RuntimeDiscoveryExecutor.discoverForResource(RuntimeDiscoveryExecutor.java:218) at org.rhq.core.pc.inventory.RuntimeDiscoveryExecutor.discoverForResource(RuntimeDiscoveryExecutor.java:234) at org.rhq.core.pc.inventory.RuntimeDiscoveryExecutor.runtimeDiscover(RuntimeDiscoveryExecutor.java:134) at org.rhq.core.pc.inventory.RuntimeDiscoveryExecutor.call(RuntimeDiscoveryExecutor.java:94) at org.rhq.core.pc.inventory.RuntimeDiscoveryExecutor.call(RuntimeDiscoveryExecutor.java:51) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:207) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) 14:15:53,981 WARN [NavigationContent] Unable to find node for deleted resource [Resource[id=-5, type=Connector, key=ajp://127.0.0.1:8009, name=ajp://127.0.0.1:8009, parent=JBoss Web]].

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• Rails on server syntax error?

  - by Danny McClelland

  Hi Everyone, I am trying to get my rails application running on my web server, but when I run the rake db:migrate I get the following error: r oot@oak [/home/macandco/rails_apps/survey_manager]# rake db:migrate (in /home/macandco/rails_apps/survey_manager) == Baseapp: migrating ======================================================== -- create_table(:settings, {:force=>true}) -> 0.0072s -- create_table(:users) -> 0.0072s -- add_index(:users, :login, {:unique=>true}) -> 0.0097s -- create_table(:profiles) -> 0.0084s -- create_table(:open_id_authentication_associations, {:force=>true}) -> 0.0067s -- create_table(:open_id_authentication_nonces, {:force=>true}) -> 0.0064s -- create_table(:roles) -> 0.0052s -- create_table(:roles_users, {:id=>false}) -> 0.0060s rake aborted! An error has occurred, all later migrations canceled: 555 5.5.2 Syntax error. g9sm2526951gvc.8 Has anyone come across this before? Thanks, Danny Main Migration file c lass Baseapp < ActiveRecord::Migration def self.up # Create Settings Table create_table :settings, :force => true do |t| t.string :label t.string :identifier t.text :description t.string :field_type, :default => 'string' t.text :value t.timestamps end # Create Users Table create_table :users do |t| t.string :login, :limit => 40 t.string :identity_url t.string :name, :limit => 100, :default => '', :null => true t.string :email, :limit => 100 t.string :mobile t.string :signaturenotes t.string :crypted_password, :limit => 40 t.string :salt, :limit => 40 t.string :remember_token, :limit => 40 t.string :activation_code, :limit => 40 t.string :state, :null => :false, :default => 'passive' t.datetime :remember_token_expires_at t.string :password_reset_code, :default => nil t.datetime :activated_at t.datetime :deleted_at t.timestamps end add_index :users, :login, :unique => true # Create Profile Table create_table :profiles do |t| t.references :user t.string :real_name t.string :location t.string :website t.string :mobile t.timestamps end # Create OpenID Tables create_table :open_id_authentication_associations, :force => true do |t| t.integer :issued, :lifetime t.string :handle, :assoc_type t.binary :server_url, :secret end create_table :open_id_authentication_nonces, :force => true do |t| t.integer :timestamp, :null => false t.string :server_url, :null => true t.string :salt, :null => false end create_table :roles do |t| t.column :name, :string end # generate the join table create_table :roles_users, :id => false do |t| t.column :role_id, :integer t.column :user_id, :integer end # Create admin role and user admin_role = Role.create(:name => 'admin') user = User.create do |u| u.login = 'admin' u.password = u.password_confirmation = 'advices' u.email = '[email protected]' end user.register! user.activate! user.roles << admin_role end def self.down # Drop all BaseApp drop_table :settings drop_table :users drop_table :profiles drop_table :open_id_authentication_associations drop_table :open_id_authentication_nonces drop_table :roles drop_table :roles_users end end

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• What is wrong with the following Fluent NHibernate Mapping ?

  - by ashraf

  Hi, I have 3 tables (Many to Many relationship) Resource {ResourceId, Description} Role {RoleId, Description} Permission {ResourceId, RoleId} I am trying to map above tables in fluent-nHibernate. This is what I am trying to do. var aResource = session.Get<Resource>(1); // 2 Roles associated (Role 1 and 2) var aRole = session.Get<Role>(1); aResource.Remove(aRole); // I try to delete just 1 role from permission. But the sql generated here is (which is wrong) Delete from Permission where ResourceId = 1 Insert into Permission (ResourceId, RoleId) values (1, 2); Instead of (right way) Delete from Permission where ResourceId = 1 and RoleId = 1 Why nHibernate behave like this? What wrong with the mapping? I even tried with Set instead of IList. Here is the full code. Entities public class Resource { public virtual string Description { get; set; } public virtual int ResourceId { get; set; } public virtual IList<Role> Roles { get; set; } public Resource() { Roles = new List<Role>(); } } public class Role { public virtual string Description { get; set; } public virtual int RoleId { get; set; } public virtual IList<Resource> Resources { get; set; } public Role() { Resources = new List<Resource>(); } } Mapping Here // Mapping .. public class ResourceMap : ClassMap<Resource> { public ResourceMap() { Id(x => x.ResourceId); Map(x => x.Description); HasManyToMany(x => x.Roles).Table("Permission"); } } public class RoleMap : ClassMap<Role> { public RoleMap() { Id(x => x.RoleId); Map(x => x.Description); HasManyToMany(x => x.Resources).Table("Permission"); } } Program static void Main(string[] args) { var factory = CreateSessionFactory(); using (var session = factory.OpenSession()) { using (var tran = session.BeginTransaction()) { var aResource = session.Get<Resource>(1); var aRole = session.Get<Role>(1); aResource.Remove(aRole); session.Save(a); session.Flush(); tran.Commit(); } } } private static ISessionFactory CreateSessionFactory() { return Fluently.Configure() .Database(MsSqlConfiguration.MsSql2008 .ConnectionString("server=(local);database=Store;Integrated Security=SSPI")) .Mappings(m => m.FluentMappings.AddFromAssemblyOf<Program>() .Conventions.Add<CustomForeignKeyConvention>()) .BuildSessionFactory(); } public class CustomForeignKeyConvention : ForeignKeyConvention { protected override string GetKeyName(FluentNHibernate.Member property, Type type) { return property == null ? type.Name + "Id" : property.Name + "Id"; } } Thanks, Ashraf.

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• Can't run my servlet from tomcat server even though the classes are in package

  - by Mido

  Hi there, i am trying to get my servlet to run, i have been searching for 2 days and trying every possible solution and no luck. The servet class is in the appropriate folder (i.e under the package name). I also added the jar files needed in my servlet into lib folder. the web.xml file maps the url and defines the servlet. So i did everything in the documentation and wt people said in here and still getting this error : type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception javax.servlet.ServletException: Error instantiating servlet class assign1a.RPCServlet org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:108) org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:558) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:379) org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:282) org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:357) org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1687) java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) java.lang.Thread.run(Thread.java:619) root cause java.lang.NoClassDefFoundError: assign1a/RPCServlet (wrong name: server/RPCServlet) java.lang.ClassLoader.defineClass1(Native Method) java.lang.ClassLoader.defineClassCond(ClassLoader.java:632) java.lang.ClassLoader.defineClass(ClassLoader.java:616) java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2820) org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1143) org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1638) org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1516) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:108) org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:558) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:379) org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:282) org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:357) org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1687) java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) java.lang.Thread.run(Thread.java:619) note The full stack trace of the root cause is available in the Apache Tomcat/7.0.5 logs. Also here is my servlet code : package assign1a; import java.io.IOException; import java.util.logging.Level; import java.util.logging.Logger; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import lib.jsonrpc.RPCService; public class RPCServlet extends HttpServlet { /** * */ private static final long serialVersionUID = -5274024331393844879L; private static final Logger log = Logger.getLogger(RPCServlet.class.getName()); protected RPCService service = new ServiceImpl(); public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { response.setContentType("text/html"); response.getWriter().write("rpc service " + service.getServiceName() + " is running..."); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { try { service.dispatch(request, response); } catch (Throwable t) { log.log(Level.WARNING, t.getMessage(), t); } } } Please help me :) Thanks. EDIT: here are the contents of my web.xml file <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0" metadata-complete="true"> <servlet> <servlet-name>jsonrpc</servlet-name> <servlet-class>assign1a.RPCServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>jsonrpc</servlet-name> <url-pattern>/rpc</url-pattern> </servlet-mapping> </web-app>

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• Cutting large XML file into smaller pieces in C#

  - by NDraskovic

  I have a problem that I'm working on for quite some time now. I have an XML file with over 50000 records (one record has 3 levels). This file is used by one of my applications to control document sending (the record holds, among other informations, the type of document that has to be sent to a certain person). So in my application I load the XML file into a XmlDocument, and then by using SelectNodes method, I create a XmlNodeList from which I read the data I want. The process is like this - our worker takes the persons ID card (simple eith barcode) and reads it with barcode reader. When the barcode value has been read, my application finds the person with that ID in the XML file, and stores the type of the document into a string variable. Then the worker takes the document and reads its barcode, and if the value of documents barcode and the value in the value in the string variable match, the application makes a record that document of type xxxxxxxx will be sent to the person with ID yyyyyyyyy. This is very simple code, it works perfectly for now, and this is how it looks: On textBox1_TextChanged event (worker read persons ID): foreach(XmlNode node in NodeList){ if(String.Compare(node.Attributes.GetNamedItem("ID").Value.ToString(),textBox1.Text)==0) { ControlString = node.ChildNode[3].FirstChild.Attributes.GetNamedItem("doctype").Value.ToString(); break; } } textBox2.Focus(); And on textBox2_TextChanged event (worker read the documents barcode): if(String.Compare(textBox2.Text,ControlString)==0) { //Create a record and insert it into a SQL database } My question is - how will my application perform with larger XML files (I was told that the XML file might be up to 500,000 records large), will this approach be valid, or will I need to cut the file into smaller files. If I have to cut it, please give me an idea with some code samples, I've tried to do it like this: Reading entire record and storing it into a string: private void WriteXml(XmlNode record) { tempXML = record.InnerXml; temp = "<" + record.Name + " code=\"" + record.Attributes.GetNamedItem("code").Value + "\">" + Environment.NewLine; temp += tempXML + Environment.NewLine; temp += "</" + record.Name + ">"; SmallerXMLDocument += temp + Environment.NewLine; temp = ""; i++; } tempXML, temp and SmallerXMLDocument are all string variables. And then in button_Click method I load the XML file into a XmlNodeList (again by using XmlDocument.SelectNodes method) and I try to create one big string value that would hold all records like this: foreach(XmlNode node in nodes) { if(String.Compare(node.ChildNode[3].FirstChild.Attributes.GetNamedItem("doctype").Value.ToString(),doctype1)==0) { WriteXML(node); } } My idea was to create a string value (in this case called SmallerXmlDocument), and when I pass trough the entire XML file, to simply copy the value of that string into a new file. This works, but only for files that have up to 2000 records (and my has way more than that). So, if I need to cut the file into smaller pieces, what would be the best way to do it (keep in mind that there could be up to half a million records in a XML file)? Thanks

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• No Method Error in Ruby

  - by JayG

  Hi, I currently have a Rails Apps that lets users drag and drop certain elements of the webpage and updates the application based on the users choice. This is done with the help of the Rails helpers and AJAX. However I keep running into a "NoMethodError" in Ruby. NoMethodError in ProjectsController#member_change undefined method `symbolize_keys' for nil:NilClass Here is the method that is being called. My trace says that error is occurring in this line: before = u.functions_for(r.authorizable_id) u.roles << r unless u.roles.include? r u.save flag_changed = true after = u.functions_for(r.authorizable_id) And here is the function being called def member_change flag_changed = false params['u'] =~ /role_(\d+)_user_(\d+)/ drag_role_id = $1 user_id = $2 params['r'] =~ /role_(\d+)/ drop_role_id = $1 if u=User.find(user_id) if r=Role.find(drop_role_id) if drag_role_id.to_i !=0 and old_r=Role.find(drag_role_id) if drag_role_id == drop_role_id #fom A to A => nothing happen flash.now[:warning] = _('No Operation...') elsif r.authorizable_id == old_r.authorizable_id #the same project? old_r.users.delete(u) unless old_r.valid? flash.now[:warning] = _('Group "Admin" CAN NOT be EMPTY.') old_r.users << u #TODO: better recovery member_edit #if flag_changed render :action => :member_edit, :layout => 'module_with_flash' return end old_r.save r.users << u unless r.users.include? u r.save flag_changed = true before = u.functions_for(r.authorizable_id) after = u.functions_for(r.authorizable_id) added = after - before removed = before - after added.each do |f| ApplicationController::send_msg(:function,:create, {:function_name => f.name, :user_id => u.id, :project_id => r.authorizable_id }) end removed.each do |f| ApplicationController::send_msg(:function,:delete, {:function_name => f.name, :user_id => u.id, :project_id => r.authorizable_id }) end flash.now[:notice] = _( 'Move User to Group' ) + " #{ r.name }" else flash.now[:warning] = _('You can\'t move User between Groups that belong to different Projects.') end else before = u.functions_for(r.authorizable_id) u.roles << r unless u.roles.include? r u.save flag_changed = true after = u.functions_for(r.authorizable_id) added = after - before added.each do |f| ApplicationController::send_msg(:function,:create, {:function_name => f.name, :user_id => u.id, :project_id => r.authorizable_id }) end flash.now[:notice] = _( 'Add User into Group' ) + " #{ r.name }" end else flash.now[:warn] = _( 'Group doesn\'t exist!' ) + ": #{ r.name }" end else flash.now[:warning] = _( 'User doesn\'t exist!' ) + ": #{ u.login }" end member_edit #if flag_changed render :action => :member_edit, :layout => 'module_with_flash' end and the JavaScript used to call the function jQuery('#RemoveThisMember').droppable({accept:'.RolesUsersSelection', drop:function(ev,ui){ if (confirm("This will remove User from this Group, are you sure?")) {jQuery.ajax({data:'u=' + encodeURIComponent(jQuery(ui.draggable).attr('id')), success:function(request){jQuery('#module_content').html(request);}, type:'post', url:'/of/projects/11/member_delete'});} }, hoverClass:'ProjectRoleDropDelete_active'}) Any ideas? Thanks,

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• COM port read - Thread remains alive after timeout occurs

  - by Sna

  Hello to all. I have a dll which includes a function called ReadPort that reads data from serial COM port, written in c/c++. This function is called within an extra thread from another WINAPI function using the _beginthreadex. When COM port has data to be read, the worker thread returns the data, ends normaly, the calling thread closes the worker's thread handle and the dll works fine. However, if ReadPort is called without data pending on the COM port, when timeout occurs then WaitForSingleObject returns WAIT_TIMEOUT but the worker thread never ends. As a result, virtual memory grows at about 1 MB every time, physical memory grows some KBs and the application that calls the dll becomes unstable. I also tryied to use TerminateThread() but i got the same results. I have to admit that although i have enough developing experience, i am not familiar with c/c++. I did a lot of research before posting but unfortunately i didn't manage to solve my problem. Does anyone have a clue on how could i solve this problem? However, I really want to stick to this kind of solution. Also, i want to mention that i think i can't use any global variables to use some kind of extra events, because each dll's functions may be called many times for every COM port. I post some parts of my code below: The Worker Thread: unsigned int __stdcall ReadPort(void* readstr){ DWORD dwError; int rres;DWORD dwCommModemStatus, dwBytesTransferred; int ret; char szBuff[64] = ""; ReadParams* params = (ReadParams*)readstr; ret = SetCommMask(params->param2, EV_RXCHAR | EV_CTS | EV_DSR | EV_RLSD | EV_RING); if (ret == 0) { _endthreadex(0); return -1; } ret = WaitCommEvent(params->param2, &dwCommModemStatus, 0); if (ret == 0) { _endthreadex(0); return -2; } ret = SetCommMask(params->param2, EV_RXCHAR | EV_CTS | EV_DSR | EV_RLSD| EV_RING); if (ret == 0) { _endthreadex(0); return -3; } if (dwCommModemStatus & EV_RXCHAR||dwCommModemStatus & EV_RLSD) { rres = ReadFile(params->param2, szBuff, 64, &dwBytesTransferred,NULL); if (rres == 0) { switch (dwError = GetLastError()) { case ERROR_HANDLE_EOF: _endthreadex(0); return -4; } _endthreadex(0); return -5; } else { strcpy(params->param1,szBuff); _endthreadex(0); return 0; } } else { _endthreadex(0); return 0; } _endthreadex(0); return 0;} The Calling Thread: int WINAPI StartReadThread(HANDLE porthandle, HWND windowhandle){ HANDLE hThread; unsigned threadID; ReadParams readstr; DWORD ret, ret2; readstr.param2 = porthandle; hThread = (HANDLE)_beginthreadex( NULL, 0, ReadPort, &readstr, 0, &threadID ); ret = WaitForSingleObject(hThread, 500); if (ret == WAIT_OBJECT_0) { CloseHandle(hThread); if (readstr.param1 != NULL) // Send message to GUI return 0; } else if (ret == WAIT_TIMEOUT) { ret2 = CloseHandle(hThread); return -1; } else { ret2 = CloseHandle(hThread); if (ret2 == 0) return -2; }} Thank you in advance, Sna.

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• DBA Command line options

  - by Anthony Shorten

  There are a number of database utilities supplied with the installation of the Oracle Utilities Application Framework based products. These are typically run in interactive mode where the utility prompts you for the values and then executes the required functionality. Did you know that the utilities also have command line options that allow you to run the utility in silent mode as well? You can assess the command line options by specifying the -h option on the command line. Here is an example of the oragensec command line options: oragensec -d <Owner,OwnerPswd,DbName> -u <Database Users> -r <ReadRole,UserRole> -l <logfile> -h where: -d <Owner,OwnerPswd,DbName> Database connect information for the target database. e.g. spladm,spladm,DB200ODB. -u <Database Users> A comma-separated list of database users where synonyms need to be created. e.g. spluser, splread -r <ReadRole,UserRole> Optional. Names of database roles with read and read-write privileges. Default roles are SPL_READ, SPL_USER. e.g. spl_read,spl_user -l <logfile> Optional. Name of the log file. -h Help The command line options allow the DBA to automate the exeucution either via a script or some utility can than execute utilities. This optin can apply to the majority of DBA utilities supplied with the product. Take a look at others.

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• Adding an Admin user to an ASP.NET MVC 4 application using a single drop-in file

  - by Jon Galloway

  I'm working on an ASP.NET MVC 4 tutorial and wanted to set it up so just dropping a file in App_Start would create a user named "Owner" and assign them to the "Administrator" role (more explanation at the end if you're interested). There are reasons why this wouldn't fit into most application scenarios: It's not efficient, as it checks for (and creates, if necessary) the user every time the app starts up The username, password, and role name are hardcoded in the app (although they could be pulled from config) Automatically creating an administrative account in code (without user interaction) could lead to obvious security issues if the user isn't informed However, with some modifications it might be more broadly useful - e.g. creating a test user with limited privileges, ensuring a required account isn't accidentally deleted, or - as in my case - setting up an account for demonstration or tutorial purposes. Challenge #1: Running on startup without requiring the user to install or configure anything I wanted to see if this could be done just by having the user drop a file into the App_Start folder and go. No copying code into Global.asax.cs, no installing addition NuGet packages, etc. That may not be the best approach - perhaps a NuGet package with a dependency on WebActivator would be better - but I wanted to see if this was possible and see if it offered the best experience. Fortunately ASP.NET 4 and later provide a PreApplicationStartMethod attribute which allows you to register a method which will run when the application starts up. You drop this attribute in your application and give it two parameters: a method name and the type that contains it. I created a static class named PreApplicationTasks with a static method named, then dropped this attribute in it: [assembly: PreApplicationStartMethod(typeof(PreApplicationTasks), "Initializer")] That's it. One small gotcha: the namespace can be a problem with assembly attributes. I decided my class didn't need a namespace. Challenge #2: Only one PreApplicationStartMethod per assembly In .NET 4, the PreApplicationStartMethod is marked as AllMultiple=false, so you can only have one PreApplicationStartMethod per assembly. This was fixed in .NET 4.5, as noted by Jon Skeet, so you can have as many PreApplicationStartMethods as you want (allowing you to keep your users waiting for the application to start indefinitely!). The WebActivator NuGet package solves the multiple instance problem if you're in .NET 4 - it registers as a PreApplicationStartMethod, then calls any methods you've indicated using [assembly: WebActivator.PreApplicationStartMethod(type, method)]. David Ebbo blogged about that here:  Light up your NuGets with startup code and WebActivator. In my scenario (bootstrapping a beginner level tutorial) I decided not to worry about this and stick with PreApplicationStartMethod. Challenge #3: PreApplicationStartMethod kicks in before configuration has been read This is by design, as Phil explains. It allows you to make changes that need to happen very early in the pipeline, well before Application_Start. That's fine in some cases, but it caused me problems when trying to add users, since the Membership Provider configuration hadn't yet been read - I got an exception stating that "Default Membership Provider could not be found." The solution here is to run code that requires configuration in a PostApplicationStart method. But how to do that? Challenge #4: Getting PostApplicationStartMethod without requiring WebActivator The WebActivator NuGet package, among other things, provides a PostApplicationStartMethod attribute. That's generally how I'd recommend running code that needs to happen after Application_Start: [assembly: WebActivator.PostApplicationStartMethod(typeof(TestLibrary.MyStartupCode), "CallMeAfterAppStart")] This works well, but I wanted to see if this would be possible without WebActivator. Hmm. Well, wait a minute - WebActivator works in .NET 4, so clearly it's registering and calling PostApplicationStartup tasks somehow. Off to the source code! Sure enough, there's even a handy comment in ActivationManager.cs which shows where PostApplicationStartup tasks are being registered: public static void Run() { if (!_hasInited) { RunPreStartMethods(); // Register our module to handle any Post Start methods. But outside of ASP.NET, just run them now if (HostingEnvironment.IsHosted) { Microsoft.Web.Infrastructure.DynamicModuleHelper.DynamicModuleUtility.RegisterModule(typeof(StartMethodCallingModule)); } else { RunPostStartMethods(); } _hasInited = true; } } Excellent. Hey, that DynamicModuleUtility seems familiar... Sure enough, K. Scott Allen mentioned it on his blog last year. This is really slick - a PreApplicationStartMethod can register a new HttpModule in code. Modules are run right after application startup, so that's a perfect time to do any startup stuff that requires configuration to be read. As K. Scott says, it's this easy: using System; using System.Web; using Microsoft.Web.Infrastructure.DynamicModuleHelper; [assembly:PreApplicationStartMethod(typeof(MyAppStart), "Start")] public class CoolModule : IHttpModule { // implementation not important // imagine something cool here } public static class MyAppStart { public static void Start() { DynamicModuleUtility.RegisterModule(typeof(CoolModule)); } } Challenge #5: Cooperating with SimpleMembership The ASP.NET MVC Internet template includes SimpleMembership. SimpleMembership is a big improvement over traditional ASP.NET Membership. For one thing, rather than forcing a database schema, it can work with your database schema. In the MVC 4 Internet template case, it uses Entity Framework Code First to define the user model. SimpleMembership bootstrap includes a call to InitializeDatabaseConnection, and I want to play nice with that. There's a new [InitializeSimpleMembership] attribute on the AccountController, which calls \Filters\InitializeSimpleMembershipAttribute.cs::OnActionExecuting(). That comment in that method that says "Ensure ASP.NET Simple Membership is initialized only once per app start" which sounds like good advice. I figured the best thing would be to call that directly: new Mvc4SampleApplication.Filters.InitializeSimpleMembershipAttribute().OnActionExecuting(null); I'm not 100% happy with this - in fact, it's my least favorite part of this solution. There are two problems - first, directly calling a method on a filter, while legal, seems odd. Worse, though, the Filter lives in the application's namespace, which means that this code no longer works well as a generic drop-in. The simplest workaround would be to duplicate the relevant SimpleMembership initialization code into my startup code, but I'd rather not. I'm interested in your suggestions here. Challenge #6: Module Init methods are called more than once When debugging, I noticed (and remembered) that the Init method may be called more than once per page request - it's run once per instance in the app pool, and an individual page request can cause multiple resource requests to the server. While SimpleMembership does have internal checks to prevent duplicate user or role entries, I'd rather not cause or handle those exceptions. So here's the standard single-use lock in the Module's init method: void IHttpModule.Init(HttpApplication context) { lock (lockObject) { if (!initialized) { //Do stuff } initialized = true; } } Putting it all together With all of that out of the way, here's the code I came up with: using Mvc4SampleApplication.Filters; using System.Web; using System.Web.Security; using WebMatrix.WebData; [assembly: PreApplicationStartMethod(typeof(PreApplicationTasks), "Initializer")] public static class PreApplicationTasks { public static void Initializer() { Microsoft.Web.Infrastructure.DynamicModuleHelper.DynamicModuleUtility .RegisterModule(typeof(UserInitializationModule)); } } public class UserInitializationModule : IHttpModule { private static bool initialized; private static object lockObject = new object(); private const string _username = "Owner"; private const string _password = "p@ssword123"; private const string _role = "Administrator"; void IHttpModule.Init(HttpApplication context) { lock (lockObject) { if (!initialized) { new InitializeSimpleMembershipAttribute().OnActionExecuting(null); if (!WebSecurity.UserExists(_username)) WebSecurity.CreateUserAndAccount(_username, _password); if (!Roles.RoleExists(_role)) Roles.CreateRole(_role); if (!Roles.IsUserInRole(_username, _role)) Roles.AddUserToRole(_username, _role); } initialized = true; } } void IHttpModule.Dispose() { } } The Verdict: Is this a good thing? Maybe. I think you'll agree that the journey was undoubtedly worthwhile, as it took us through some of the finer points of hooking into application startup, integrating with membership, and understanding why the WebActivator NuGet package is so useful Will I use this in the tutorial? I'm leaning towards no - I think a NuGet package with a dependency on WebActivator might work better: It's a little more clear what's going on Installing a NuGet package might be a little less error prone than copying a file A novice user could uninstall the package when complete It's a good introduction to NuGet, which is a good thing for beginners to see This code either requires either duplicating a little code from that filter or modifying the file to use the namespace Honestly I'm undecided at this point, but I'm glad that I can weigh the options. If you're interested: Why are you doing this? I'm updating the MVC Music Store tutorial to ASP.NET MVC 4, taking advantage of a lot of new ASP.NET MVC 4 features and trying to simplify areas that are giving people trouble. One change that addresses both needs us using the new OAuth support for membership as much as possible - it's a great new feature from an application perspective, and we get a fair amount of beginners struggling with setting up membership on a variety of database and development setups, which is a distraction from the focus of the tutorial - learning ASP.NET MVC. Side note: Thanks to some great help from Rick Anderson, we had a draft of the tutorial that was looking pretty good earlier this summer, but there were enough changes in ASP.NET MVC 4 all the way up to RTM that there's still some work to be done. It's high priority and should be out very soon. The one issue I ran into with OAuth is that we still need an Administrative user who can edit the store's inventory. I thought about a number of solutions for that - making the first user to register the admin, or the first user to use the username "Administrator" is assigned to the Administrator role - but they both ended up requiring extra code; also, I worried that people would use that code without understanding it or thinking about whether it was a good fit.

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• Oracle IRM video demonstration of seperating duties of document security

  - by Simon Thorpe

  One thing an Information Rights Management technology should do well is separate out three main areas of responsibility.The business process of defining and controlling the classifications to which content is secured and the definition of the roles employees, customers, partners and contractors have when accessing secured content. Allow IT to manage the server and perform the role of authorizing the creation of new classifications to meet business needs but yet once the classification has been created and handed off to the business, IT no longer plays a role on the ongoing management. Empower the business to take ownership of classifications to which their own content is secured. For example an employee who is leading an acquisition project should be responsible for defining who has access to confidential project documents. This person should be able to manage the rights users have in the classification and also be the point of contact for those wishing to gain rights. Oracle IRM has since it's creation in the late 1990's had this core model at the heart of its design. Due in part to the important seperation of rights from the documents themselves, Oracle IRM places the right functionality within the right parts of the business. For example some IRM technologies allow the end user to make decisions about what users can print, edit or save a secured document. This in practice results in a wide variety of content secured with a plethora of options that don't conform to any policy. With Oracle IRM users choose from a list of classifications to which they have been given the ability to secure information against. Their role in the classification was given to them by the business owner of the classification, yet the definition of the role resides within the realm of corporate security who own the overall business classification policies. It is this type of design and philosophy in Oracle IRM that makes it an enterprise solution that works beyond a few users and a few secured documents to hundreds of thousands of users and millions of documents. This following video shows how Oracle IRM 11g, the market leading document security solution, lets the security organization manage and create classifications whilst the business owns and manages them. If you want to experience using Oracle IRM secured content and the effects of different roles users have, why not sign up for our free demonstration.

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• Are project managers useful in Scrum?

  - by Martin Wickman

  There are three roles defined in Scrum: Team, Product Owner and Scrum Master. There is no project manager, instead the project manager job is spread across the three roles. For instance: The Scrum Master: Responsible for the process. Removes impediments. The Product Owner: Manages and prioritizes the list of work to be done to maximize ROI. Represents all interested parties (customers, stakeholders). The Team: Self manage its work by estimating and distributing it among themselves. Responsible for meeting their own commitments. So in Scrum, there is no longer a single person responsible for project success. There is no command-and-control structure in place. That seems to baffle a lot of people, specifically those not used to agile methods, and of course, PM's. I'm really interested in this and what your experiences are, as I think this is one of the things that can make or break a Scrum implementation. Do you agree with Scrum that a project manager is not needed? Do you think such a role is still required? Why?

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• Rails/Node.js interaction

  - by lpvn

  I and my co-worker are developing a web application with rails and node.js and we can't reach a consensus regarding a particular architectural decision. Our setup is basically a rails server working with node.js and redis, when a client makes a http request to our rails API in some cases our rails application posts the response to a redis database and then node.js transmits the response via websocket. Our disagreement occurs in the following point: my co-worker thinks that using node.js to send data to clients is somewhat business logic and should be inside the model, so in the first code he wrote he used commands of broadcast in callbacks and other places of the model, he's convinced that the models are the best place for the interaction between rails and node. I on the other hand think that using node.js belongs to the runtime realm, my take is that the broadcast commands and other node.js interactions should be in the controller and should only be used in a model if passed through a well defined interface, just like the situation when a model needs to access the current user of a session. At this point we're tired of arguing over this same thing and our discussion consists in us repeating to ourselves our same opinions over and over. Could anyone, preferably with experience in the same setup, give us an unambiguous response saying which solution is more adequate and why it is?

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• Thinktecture.IdentityServer Beta 1

  - by Your DisplayName here!

  I just upload beta 1 to codeplex. Please test this version and give me feedback. Some quick notes on setup Watch the intro screencast on the codeplex site. Use the setup tool to set the signing and SSL certificate. You can now also set the ACLs on the private key for your worker pool account. IIS is required . SSL for the IIS site the STS runs in is required. Users of the STS must be in the 'IdentityServerUsers' role. Admins of the STS must be in the 'IdentityServerAdministrators' roles. What’s new? Mainly smaller bits and pieces and some refactoring. The biggest under the cover change is a new authorization model for the STS itself. If, e.g. you don’t like the new roles I introduced, you can easily change the behavior in the claims authorization manager in the STS web site project. What’s missing? The big one is Azure support. Not that I ran into unforeseeable problems here, I just wanted to wait until the on-premise version is more stabilized. Now with B1 I can start adding Azure support back.

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• Inevitable Corporate Bureaucracy

  - by Ahsan Alam

  Top executives of most smaller organizations want their companies to be different from the larger corporations. They want their organizations smaller in size; but bigger in productivity by eliminating red tapes and corporate bureaucracy. When the company is smaller, people often work like firefighters – taking on new business and technology challenges without thinking about any procedures and guidelines. People also tend to wear many hats to accomplish tasks quickly in order to integrate new businesses. For example, software developers in smaller organizations may take on responsibilities of client interactions, requirements gathering, design and development, code deployment, production support, network infrastructure support, database design and maintenance along with countless other duties. In addition, systems in smaller organizations tend to be loosely guarded. So, people often don't follow many procedures in order to setup environments and implement technical projects. It's not uncommon to change code and deploy without anyone realizing. Similarly, business requirements may also get defined in an informal manner without any type of documentation. As the company grows, everything starts to change significantly impacting people and the overall business process. Suddenly, following procedures become extremely important. Consequently, new roles, guidelines and procedures start to emerge. Everything from business process to technology implementation start to become more and more process oriented. Organizations start to define and document steps, invent procedure to track process and systems level changes, and start restricting access to various systems for security reasons. At the same time, as a growing company start doing businesses with larger clienteles, they are automatically forced to abide by all sorts of industry compliance laws. Moreover, growing companies tend to recruit experienced individuals to fill new roles who usually bring their expertise from larger and more bureaucratic organizations.   Despite the best efforts from the top executives, it seems increased number of procedures and guidelines as well as new recruits automatically contribute to the evolution of corporate bureaucracy. Maybe, corporate bureaucracy is an inevitable side effect of a growing organization.

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• Are project managers useful in Scrum?

  - by Martin Wickman

  There are three roles defined in Scrum: Team, Product Owner and Scrum Master. There is no project manager, instead the project manager job is spread across the three roles. For instance: The Scrum Master: Responsible for the process. Removes impediments. The Product Owner: Manages and prioritizes the list of work to be done to maximize ROI. Represents all interested parties (customers, stakeholders). The Team: Self manage its work by estimating and distributing it among themselves. Responsible for meeting their own commitments. So in Scrum, there is no longer a single person responsible for project success. There is no command-and-control structure in place. That seems to baffle a lot of people, specifically those not used to agile methods, and of course, PM's. I'm really interested in this and what your experiences are, as I think this is one of the things that can make or break a Scrum implementation. Do you agree with Scrum that a project manager is not needed? Do you think such a role is still required? Why?

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• ArchBeat Link-o-Rama for December 5, 2012

  - by Bob Rhubart

  On the Cultural-Linguistic Turn | Richard Veryard "When an architect chooses to label something as a 'silo' or 'legacy,' or uses words like 'integrated' and 'standardized,', these may not always be objectively verifiable categories but subjective judgements, around which the architect may then weave an appropriate story." -- Richard Veryard Advanced Oracle SOA Suite presentations from Open World 2012 | Juergen Kress Oracle SOA and BPM Partner Community blogger Juergen Kress shares a list of 13 SOA presentations delivered or moderated by Oracle SOA Product Management at OOW12 in San Francisco. Coherence 101, Beware of cache listeners | Alexey Ragozin Alexey Ragozin's technical post will help you avoid trouble when working with the cache events facility in Oracle Coherence. 3 Key Cloud Insights for 2013 | CTO Blog Capgemini CTO blogger Ron Tolido highlights three "standout" insights from a recent Capgemini report on the business cloud. Access Control Lists for Roles | Kyle Hatlestad Oracle Fusion Middleware A-Team member Kyle Hatlestad shares background info and instructions for activating access control lists for roles in Oracle WebCenter UCM 11g PS5. Thought for the Day "If it ain’t broke, fix it anyway. You must invest least 20% of your maintenance budget in refreshing your architecture to prevent good software from becoming spaghetti code." — Larry Bernstein Source: SoftwareQuotes.com

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• Does a team of developers need a manager?

  - by Amadiere

  Background: I'm currently part of a team of four: 1 manager, 1 senior developer and 2 developers. We do a range of bespoke in-house systems / projects (e.g. 6-8 weeks) for an organisation of around 3500 staff, as well as all the maintenance and support required from the systems that have been created before. There is not enough of us to do all the work that is potentially coming our way - we're understaffed. Management acknowledge this, but budget restraints limit our ability to recruit additional members to the team (even if we make the salary back in savings). The Change This leaves us where we are now. Our manager is due to leave his role for pastures new, leaving a vacancy in the team. Management are using this opportunity to restructure our team which would see the team manager role replaced by another developer and another senior developer. Their logic being that we need more developers, so here's a way of funding it (one of the roles is partially funded from another vacant post). The team would have no direct line manager and the roles and responsibilities would be divided up between the seniors and the (relatively new to post) service manager (a non-technical role with little-to-no development knowledge/experience whose focus is shared amongst a number of other teams and individuals) - who would be our next actual manager up the food chain. I guess the final question is: Is it possible to run a development team without an manager? Have you had experience of this? And what things could go wrong / could be of benefit to us? I'd ideally like to "see the light" and the benefits of doing things this way, or come up with some points for argument against it.

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• Permission based Authorization vs. Role based Authorization - Best Practices - 11g

  - by Prakash Yamuna

  In previous blog posts here and here I have alluded to the support in OWSM for Permission based authorization and Role based authorization support. Recently I was having a conversation with an internal team in Oracle looking to use OWSM for their Web Services security needs and one of the topics was around - When to use permission based authorization vs. role based authorization? As in most scenarios the answer is it depends! There are trade-offs involved in using the two approaches and you need to understand the trade-offs and you need to understand which trade-offs are better for your scenario. Role based Authorization: Simple to use. Just create a new custom OWSM policy and specify the role in the policy (using EM Fusion Middleware Control). Inconsistent if you have multiple type of resources in an application (ex: EJBs, Web Apps, Web Services) - ex: the model for securing EJBs with roles or the model for securing Web App roles - is inconsistent. Since the model is inconsistent, tooling is also fairly inconsistent. Achieving this use-case using JDeveloper is slightly complex - since JDeveloper does not directly support creating OWSM custom policies. Permission based Authorization: More complex. You need to attach both an OWSM policy and create OPSS Permission authorization policies. (Note: OWSM leverages OPSS Permission based Authorization support). More appropriate if you have multiple type of resources in an application (ex: EJBs, Web Apps, Web Services) and want a consistent authorization model. Consistent Tooling for managing authorization across different resources (ex: EM Fusion Middleware Control). Better Lifecycle support in terms of T2P, etc. Achieving this use-case using JDeveloper is slightly complex - since JDeveloper does not directly support creating/editing OPSS Permission based authorization policies.

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• Oracle Global HR Cloud Implementation Training Can Help Meet Your Business Needs

  - by HCM-Oracle

  By Jim Vonick A key goal for the deployment of your Oracle Global HR Cloud applications is to accelerate the implementation and adoption of your applications, so that your business can start realizing all of the benefits that this rich solution offers.    Implementation team members need to have the skills and knowledge to ensure a smooth, rapid and successful implementation of your applications. During set-up, you want to optimize the configuration to best meet your business needs. In order to do this you need to understand the foundation and configuration options of your applications, so that decisions can be made during set-up that best align with your business.  To that end product level implementation training is recommended for Oracle Global HR Cloud deployments. Training For Implementation Team Members and Consultants Fusion Applications: HCM Security: Learn how to implement security for Oracle Fusion HCM applications by creating and customizing roles. You'll learn how to create security profiles to restrict data access, provision roles to users, create and manage user accounts, and verify security setup. Fusion Applications: HCM Global Human Resources: Learn how to set up your enterprise and workforce structures, how to perform functional tasks, and how to configure security for Global Human Resources data. Fusion Applications: HCM Compensation: Learn how to implement, configure, and use Oracle Fusion Compensation to manage base pay, individual compensation, workforce compensation, and total compensation statements. Fusion Applications: HCM Benefits: This course teaches you to implement, configure and manage Oracle Fusion Benefits, including how to implement benefit plans and programs.  Fusion Applications: HCM Payroll Implementation (US): This course provides implementation training for payroll managers or payroll administrators. Learn how to process payroll to ensure accurate setup results.  Learn More: See all Fusion HCM Training Jim Vonick is a Senior Product Manager with Oracle University focusing on training for Oracle Applications and Industry Solutions.

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• How to restore curropted installation?

  - by nightweels

  I have a laptop with dead battery that when there is no current connected to it turns critical so fast and in the energy management in ubuntu, when the battery is critical, there are 2 options: shutdown and hibernate witch is in grey (unclickable), so I have no choice but to chose immediate shutdown, there is no standby even if it is an option in the screen behavior. An immediate shutdown (and I mean by immediate the one that we use when we ended using the computer) happened while I was installing a program called quickly, so after the power was restored, I tried to reinstall the program then I get this translated message: An untreatable error occurred: It seems there is a software error in aptdaemon, the program that lets you install and remove software and any other task related to package management. details: Traceback (most recent call last): File "/usr/lib/python2.7/dist-packages/aptdaemon/worker.py", line 968, in simulate trans.unauthenticated = self._simulate_helper(trans) File "/usr/lib/python2.7/dist-packages/aptdaemon/worker.py", line 1092, in _simulate_helper return depends, self._cache.required_download, \ File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 235, in required_download pm.get_archives(fetcher, self._list, self._records) SystemError: E:I wasn't able to locate a file for the libpng12-dev package. This might mean you need to manually fix this package.

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• NDC Oslo

  - by Alan Smith

  Originally posted on: http://geekswithblogs.net/asmith/archive/2013/06/14/153136.aspx2013 has been a hectic year for conference presentations so far, NDC in Oslo has been the 6th conference I have attended, and my session there was my 11th conference presentation this year. I have been meaning to make the short trip over from Stockholm to NDC for a few years, and this was the first time I made it. I have heard a lot of great things about the event, and was impressed with the location, the sessions, and most of all the atmosphere around the event boots and during the party on Thursday evening. The session I was delivering was my “Grid Computing with 256 Windows Azure Worker Roles & Kinect” demo, which I have delivered at many events over the past 12 months. The demo went fine. I’m always a little nervous when I try to scale out the application to 256 worker roles, it almost always works well and the application will scale in minutes, but very occasionally there can be a longer delay due to the provisioning process in the Windows Azure data centers. This would not be an issue for many scenarios, but when standing on stage in front of a room full of developers you really want things to run smoothly. A number of people have suggested that I should pre-provision an environment so that it is guaranteed to be there when I run the demo during a session. For me the aim has always been to show the rapid scalability on cloud-based platforms live on stage. Pre-provisioning an environment may make for a more reliable demo but to me that would be cheating, and not half as much fun!

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• How to manage long running background threads and report progress with DDD

  - by Mr Happy

  Title says most of it. I have found surprising little information about this. I have a long running operation of which the user wants to see the progress (as in, item x of y processed). I also need to be able to pause and stop the operation. (Stopping doesn't rollback the items already processed.) The thing is, it's not that each item takes a long time to get processed, it's that that there are usually a lot of items. And what I've read about so far is that it's somewhat of an anti-pattern to put something like a queue in the DB. I currently don't have any messaging system in place, and I've never worked with one either. Another thing I read somewhere is that progress reporting is something that belongs in the application layer, but it didn't go into the details. So having said all this, what I have in mind is the following. User request with list of items enters the application layer. Application layer gets some information from the domain needed to process the items. Application layer passes the items and the information off to some domain service (should the implementation of this service belong in the infrastructure layer?) This service spins up a worker thread with callbacks for both progress reporting and pausing/stopping it. This worker thread will process each item in it's own UoW. This means the domain information from earlier needs to be stored in some DTO. Since nothing is really persisted, the service should be singleton and thread safe Whenever a user requests a progress report or wants to pause/stop the operation, the application layer will ask the service. Would this be a correct solution? Or am I at least on the right track with this? Especially the singleton and thread safe part makes the whole thing feel icky.

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• DB Schema for ACL involving 3 subdomains

  - by blacktie24

  Hi, I am trying to design a database schema for a web app which has 3 subdomains: a) internal employees b) clients c) contractors. The users will be able to communicate with each other to some degree, and there may be some resources that overlap between them. Any thoughts about this schema? Really appreciate your time and thoughts on this. Cheers! -- -- Table structure for table locations CREATE TABLE IF NOT EXISTS locations ( id bigint(20) NOT NULL, name varchar(250) NOT NULL ) ENGINE=InnoDB DEFAULT CHARSET=latin1; -- -- Table structure for table privileges CREATE TABLE IF NOT EXISTS privileges ( id int(11) NOT NULL AUTO_INCREMENT, name varchar(255) NOT NULL, resource_id int(11) NOT NULL, PRIMARY KEY (id) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=10 ; -- -- Table structure for table resources CREATE TABLE IF NOT EXISTS resources ( id int(11) NOT NULL AUTO_INCREMENT, name varchar(255) NOT NULL, user_type enum('internal','client','expert') NOT NULL, PRIMARY KEY (id) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=3 ; -- -- Table structure for table roles CREATE TABLE IF NOT EXISTS roles ( id int(11) NOT NULL AUTO_INCREMENT, name varchar(255) NOT NULL, type enum('position','department') NOT NULL, parent_id int(11) DEFAULT NULL, user_type enum('internal','client','expert') NOT NULL, PRIMARY KEY (id) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=3 ; -- -- Table structure for table role_perms CREATE TABLE IF NOT EXISTS role_perms ( id int(11) NOT NULL AUTO_INCREMENT, role_id int(11) NOT NULL, privilege_id int(11) NOT NULL, mode varchar(250) NOT NULL, PRIMARY KEY (id) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=2 ; -- -- Table structure for table users CREATE TABLE IF NOT EXISTS users ( id int(10) unsigned NOT NULL AUTO_INCREMENT, email varchar(255) NOT NULL, password varchar(255) NOT NULL, salt varchar(255) NOT NULL, type enum('internal','client','expert') NOT NULL, first_name varchar(255) NOT NULL, last_name varchar(255) NOT NULL, location_id int(11) NOT NULL, phone varchar(255) NOT NULL, status enum('active','inactive') NOT NULL DEFAULT 'active', PRIMARY KEY (id) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=4 ; -- -- Table structure for table user_perms CREATE TABLE IF NOT EXISTS user_perms ( id int(11) NOT NULL AUTO_INCREMENT, user_id int(11) NOT NULL, privilege_id int(11) NOT NULL, mode varchar(250) NOT NULL, PRIMARY KEY (id) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=2 ; -- -- Table structure for table user_roles CREATE TABLE IF NOT EXISTS user_roles ( id int(11) NOT NULL, user_id int(11) NOT NULL, role_id int(11) NOT NULL ) ENGINE=InnoDB DEFAULT CHARSET=latin1;

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• Podcast Show Notes: Architect Meet-Up

  - by Bob Rhubart

  What happens when you get bunch of architects together and just let them talk? The latest ArchBeat Podcast features just such a conversation. The four participants in this conversation responded to a general invitation to my list of some three dozen Usual Suspects to join me on Skype for what I call a virtual meet-up. That conversation took place on March 20, 2012. The Participants Basheer Khan: Oracle ACE Director; Founder, President & CEO at Innowave Technology Lucas Jellema: Oracle ACE Director; CTO of AMIS Services Eric Stephens: a director of Enterprise Architecture at Oracle Derek Sharpe: director of Oracle’s Fusion Middleware Architecture Team The Conversation Listen to Part 1: Meeting the Mobile Challenge The conversation focuses on Oracle ADF Mobile and the challenges of defining a mobile strategy for the enterprise. Listen to Part 2: Mobile Security, Availability, and Usability (April 4) The conversation turns to the security, availability, and usability challenges in the evolution of the mobile enterprise. Listen to Part 3 Evolving Software Development Roles (April 11) The panel closes out the discussion with a look at the interplay between developers and architects, and the evolving nature of both roles.

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