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• Merging two templates in iText

  - by Shaggy Frog

  Let's say I have two PDF templates created with Adobe Acrobat, which are both single-page, 8.5x11 documents. The first template (A.pdf) has content for the top half of the page. The second template (B.pdf) has content for the bottom half of the page. (It just so happens the content in both templates does not "overlap" each other.) I would like to use iText to take these two templates and create a single, "merged" template from it (C.pdf) that is only a single page (with A.pdf's content on the top half and B.pdf's content on the bottom half). (I do not want to "merge" these two files into a 2-page document. I need the final product to be a single page.) I will be running iText in a servlet environment (Tomcat 6) but I don't think that makes a difference to the answer. Is this possible?

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• Can not set Character Encoding using sun-web.xml

  - by stck777

  I am trying to send special characters like spanish chars from my page to a JSP page as a form parameter. When I try get the parameter which I sent, it shows that as "?" (Question mark). After searching on java.net thread I came to know that I should have following entry in my sun-web.xml <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE sun-web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Sun ONE Application Server 8.0 Servlet 2.4//EN" "http://www.sun.com/software/sunone/appserver/dtds/sun-web-app_2_4-0.dtd"> <sun-web-app> <locale-charset-info default-locale="es"> <locale-charset-map locale="es" charset="UTF-8"/> <parameter-encoding default-charset="UTF-8"/> </locale-charset-info> </sun-web-app> But it did not work with this approach still the character goes as "?".

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• synchronized block in JSP tag class

  - by Sudhakar

  Hi, I am trying to find answer for the following ,for the past couple of days ,but couldnt find comprehensive answer Problem Statement I have a custom JSP tag class which handles a web form submission ,captures data and write it to same file in the filesystem. As all web applications,this can be triggeredsimultaneosly ,and i fear that multiple threads would be in action handling each of the submission (we all know thats how Servlet works.) CODE synchronized (this){ final String reportFileName = "testReport.csv"; File reportDir = new File( rootCsDirectory, "reports" ); if(!reportDir.isDirectory())reportDir.mkdir(); File reportFile = new File (reportDir, reportFileName); logReport(reportFile,reportContent.toString()); } ISSUE: - A File object can be opened by one thread for writing and at same time another thread might try to access and fail and throw an exception So i thought of synchronizing (on the object ) should solve the issue , but read some where that jsp engine would have pool of jsp tag objects, so i am afraid that synchronized (this) wont work and it should be changed to synchronized (this.getClass())

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• How can something like BOSH be implemented using Java Servlets

  - by John

  BOSH (Bidirectional-streams Over Synchronous HTTP) is a sneaky way of implementing 2-way client-server communication in situations where true server-push is not allowed, most obviously to let a server push data to a browser client without having to use client polling. It works by the client sending a request to the server, and the server doesn't respond immediately... rather it remembers the request but only responds when it has some data to send. When this happens the client immediately sends another request so there is virtually always a 'stored request' sitting on the server ready to push data to the client. At least, that's how I think it works! My question is how you can do this using a Java EE stack i.e standard servlets. I'm rusty with them, is it allowed to send no response and cache the request somehow? If anyone could share (pseudo) code what a servlet class for handling BOSH might look like, I'd be real grateful.

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• how to manually deploy a web service on tomcat 6?

  - by opensas

  I'm learning how to develop soap web services with java. So far now I've been following this excelente tutorial http://java.sun.com/developer/technicalArticles/J2SE/jax_ws_2/ it all goes well, I have my web service working from the command line with it's embeded server, and then, with the help of netbeans I deployed it on tomcat. I'd like to know the steps to manually deploy it on tomcat, in order to learn how it's done, and because I don't like depending on an ide. I mean, I'd like to know how everything could be done from the command line and a text editor. I've also found this link that explains how to manually deploy a servlet to tomcat, http://linux-sxs.org/internet_serving/c292.html but I couldn't find any article telling how to deploy a web service... thanks a lot saludos sas

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• jndi reference error in ejb3.0

  - by Nila

  Hi! I'm trying to implement a stateless session bean in ejb3 using glassfish server v2 and netbeans as the editor. I'm using jndi lookup for calling bean class. When I tried to deploy the war file where I'm calling the bean class through servlet, it is showing the following error: This web app [C:\Documents and Settings\Test-war\build\web] has no ejb reference by the name of [TestingBean] deployed with moduleid = Test-war I manually created glassfish deployment descriptor for ejb and edited sun-web xml file in war. How to solve this jndi reference problem. Where I'm missing? Thanks in advance

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• Ask Basic Configurator in Apache Commong Log

  - by adisembiring

  I use log4j as logger for my web application. in log4j, I can set the level log in log4j properties or log4j.xml. in log4j, we instance logger as follows: static Logger logger = Logger.getLogger(SomeClass.class); I init log4j basic configurator in a servlet file using init method. But, I usually test application using JUnit, So I init the basic configurator in setup method. after that, I test the application, and I can see the log. Because I deployed, the web in websphere. I change all of logging instance become: private Log log = LogFactory.getLog(Foo.class); I don't know how to load basic configurator using ACL. so I can't control debug level to my JUnit test. do you have any suggestion, without changing static Logger logger = Logger.getLogger(SomeClass.class); become static Logger logger = Logger.getLogger(SomeClass.class);

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• Jetty 7 Continuations: How to *not* redispatch the request?

  - by Don Werve

  I'm using Jetty 7 continuations to implement some asynchronous processing. What I'm trying to do is start off the continuation (via .suspend()), and then hand the continuation off to some other object that will compose the response, which works fine. But Jetty keeps redispatching the response (with isInitial = false) to the servlet, and I don't want or need that, because the response is being dealt with by some other object. So, I'd like to find a way to explicitly not redispatch the request on timeout or expire, because I'm using an event-driven series of callbacks to actually produce the response.

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• Grails LDAP authentication failed

  - by Leo

  Hi, guys I am developing a web app by using Grails and using Grails LDAP as my Authentication mechanism. However, i always get following error: {Error 500: Cannot pass null or empty values to constructor Servlet: default URI: /ldap-app/j_spring_security_check Exception Message: Cannot pass null or empty values to constructor Caused by: Cannot pass null or empty values to constructor Class: GrailsAuthenticationProcessingFilter } My SecurityConfig.groovy file is : security { // see DefaultSecurityConfig.groovy for all settable/overridable properties active = true loginUserDomainClass = "User" authorityDomainClass = "Role" requestMapClass = "Requestmap" useLdap = true ldapRetrieveDatabaseRoles = false ldapRetrieveGroupRoles = false ldapServer = 'ldap://worf-mi.dapc.kao.au:389' ldapManagerDn = 'CN=sa-ldap-its,OU=Unix Servers for Kerberos,OU=Information Technology Services,OU=Special Accounts,DC=nexus,DC=dpac,DC=cn' ldapManagerPassword = 'Asdf1234' ldapSearchBase = 'OU=People,DC=nexus,DC=dpac,DC=cn' ldapSearchFilter = '(&(cn={0})(objectClass=user))' }

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• What should a Java/SOA developer be able to do?

  - by Regular Joe

  I got assigned the task to list the activities a Java Developer should be able to perform and create an estimate about the time it would take. I've came up with the following: Create JDBC CRUD backend ( S=1d, M=5d, H=10d ) Create JSP/Servlet frontend for a CRUD app ( S=1d, M=10d, H=20d ) Create Swing desktop frontend ( S=1d, M=15d, H=30d) Create ORM based CRUD etc. Create Webapp fronend with webframework etc Where.. S = Small complexity M = Medium complexity H = High complexity 1d = 1 day This is thought for a Java "enterprise" developer. The other profile I have is SOA Developer, but I could not pass beyond: Create webservice ( S=.5d, M=2d, H=7d ) Q.- What other activities should a Java Developer be able to do? Q.- What activities should a SOA Developer be able to do? Please, help me with this, I know this is in the limit of the kind of questions that could be asked here, but I really need a little push on this, and I don't want to go to Yahoo Answers for this.

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• What to pass to UserType, BlobType.setPreparedStatement session parameter

  - by dlots

  http://blog.xebia.com/2009/11/09/understanding-and-writing-hibernate-user-types/ I am attempting to defined a customer serialization UserType that mimics, the XStreamUserType referenced and provided here: http://code.google.com/p/aphillips/source/browse/commons-hibernate-usertype/trunk/src/main/java/com/qrmedia/commons/persistence/hibernate/usertype/XStreamableUserType.java My serializer outputs a bytearray that should presumably written to a Blob. I was going to do: public class CustomSerUserType extends DirtyCheckableUserType { protected SerA ser=F.g(SerA.class); public Class<Object> returnedClass() { return Object.class; } public int[] sqlTypes() { return new int[] {Types.BLOB}; } public Object nullSafeGet(ResultSet resultSet,String[] names,Object owner) throws HibernateException,SQLException { if() } public void nullSafeSet(PreparedStatement preparedStatement,Object value,int index) throws HibernateException,SQLException { BlobType.nullSafeSet(preparedStatement,ser.ser(value),index); } } Unfortunetly, the BlobType.nullSafeSet method requires the session. So how does one define a UserType that gets access to a servlet requests session? EDIT: There is a discussion of the issue here and it doesn't appear there is a solution: Best way to implement a Hibernate UserType after deprecations?

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• Converting a JSP to a SharePoint webpart

  - by Kelly French

  We have a large number of Java based servlets/portlets running in a BEA portal that we want to convert into SharePoint 2007 webparts. Many of the portlets use user preferences but the implementations are split between preferences being handled by the portlet directly and stored in a separate database from the portal. Others are using the BEA WebLogic API for user preferences. Three questions: Has anyone gotten a Java Servlet/JSP (compiled against JRE 1.4.2 and running on Tomcat 4.1) to run as a SharePoint 2007 webpart? How large of an effort was it in general (as in, was it measured in days/weeks/months)? Would it be easier to rewrite the portlet as native webparts at least as far as user preferences are concerned?

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• Java framework "suggestion" for persisting the results from an Oracle 9i stored procedure using Apac

  - by chocksaway

  Hello, I am developing a Java servlet which calls an Oracle stored procedure. The stored procedure is likely to "grow" over time, and I have concerns the amount of time taken to "display the results on a web page". While I am at the implementation stage, I would like some suggestions of a Persistence framework which will work on Apache Tomcat 5.5? I see two approaches to persisting the database results. A scheduled database query every N minutes, or something which utilises triggers. Hibernate seems like the obvious answer, but I have never called stored procedures from Hibernate (HQL and Criteria). Is there a more appropriate framework which can be used? Thank you. cheers Miles.

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• Empty page instead of custom tomcat error page

  - by Alexander

  My setting: Apache 2.2 + Tomcat 6.0 @ Windows 2008 R2 64bit static webpages: / servlet: /foo tomcat and apache are connected by mod_jk 404.jsp is placed in tomcat\webapps\ROOT tomcat\conf\web.xml: <error-page> <error-code>404</error-code> <location>/404.jsp</location> </error-page> apache\conf\extra\httpd-ssl.conf: JkMount /foo/* worker1 JkMount /404.jsp worker1 When I open https://...../404.jsp my custom error page is displayed. But when I open https://...../foo/nonexisting.html an empty page is displayed. If I remove the <error-page>...</error-page> code from web.xml and open https://...../foo/nonexisting.html then tomcats own 404 is displayed. Any hints?

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• Apache Commons EmailValidator and SeamListener Exception (not deploying)

  - by ranirani

  Hi, friends When using Apache Commons EmailValidator through Maven, I have the following problem that doesn't deploy my app: Exception sending context initialized event to listener instance of class org.jboss.seam.servlet.SeamListener java.lang.LinkageError: loader constraints violated when linking org/xml/sax/EntityResolver class I've used the following code at my pom.xml: <dependency> <groupId>commons-validator</groupId> <artifactId>commons-validator</artifactId> <version>1.3.1</version> </dependency> One help?

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• Anyone up to creating a tomcat based alternative for GAE?

  - by bach

  Hi, If we had the possibility to run GAE app without any code change on our servlet engine that would be great because: in case that google changes their billing policy we can just jump to our own server or in case their current policy doesn't fit our app needs we can do stuff which is not allowed in the GAE, compromising a 1 JVM, 1 DB We don't actually need a distributed system but more of a realtime system with synchronize, true locking mechanisms, other servers/software installed on the server machine, socket interface etc... Such a package should include at least: TomCat (or equivalent) DataNucleus Access Platform (Task Queue service) Any idea if it's easy to get such a thing or if it's already exist somewhere? Thanks

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• How to add resource files during build on J2ee (eclipse + jboss)

  - by legendlink

  hi, i'm trying to run a web servlet project in eclipse 3.4 using jboss 4.2.2 as my web server. im using the wtp plugin and everything looks good (can run and debug). but some of the files/resources are not included on the war file. in my "WebContent/WEB-INF" folder, i have "properries", "config", and "lib" folders. but it seems like when i build and publish the project, only "config" and "lib" folders are included. how can i include the "properties" file during build?

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• Quartz job not firing after moving war to ear

  - by Eqbal

  I used to have a web app deployed as a war file in weblogic. I moved the war into an ear file and redeployed. But now it seems a configured quartz job is no longer firing. Not sure if its not finding the properties file anymore. Its defined like this in the servlet config (web.xml) <init-param> <param-name>config-file</param-name> <param-value>properties/quartz.properties</param-value> </init-param>

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• How can I disable Hibernate-cache logs?

  - by Mulone

  Hi guys, My Grails app log is being flooded with thousands of messages like: 2010-05-21 18:54:08,261 [30462143@qtp-19943008-38] DEBUG hibernate.EhCache - key: ga_event value: 5220206380077056 This is my log4j config: // log4j configuration log4j = { // Example of changing the log pattern for the default console // appender: // appenders { console name:'stdout',layout:pattern(conversionPattern: '%c{2} %m%n') rollingFile name:'applog', file: logDirectory+"/${appName}_main.log", maxFileSize:'10MB' //'null' name:'stacktrace' file name: 'stacktrace', file: logDirectory+"/${appName}_stacktrace.log", layout: pattern(conversionPattern: '%c{2} %m%n') } error 'org.codehaus.groovy.grails.web.servlet', // controllers 'org.codehaus.groovy.grails.web.pages', // GSP 'org.codehaus.groovy.grails.web.sitemesh', // layouts 'org.codehaus.groovy.grails.web.mapping.filter', // URL mapping 'org.codehaus.groovy.grails.web.mapping', // URL mapping 'org.codehaus.groovy.grails.commons', // core / classloading 'org.codehaus.groovy.grails.plugins', // plugins 'org.codehaus.groovy.grails.orm.hibernate', // hibernate integration 'org.springframework', 'org.hibernate', stacktrace: "stacktrace" warn 'org.mortbay.log' root { debug 'stdout', 'applog' additivity = true } } Any idea on how to disable that log? Cheers

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• Good way to make Authentication and Authorization information available between application layers

  - by DutrowLLC

  I have a web application running on Google App Engine (GAE) for JAVA. I'm authenticating the client at the Servlet layer but would like to make the client information available to my business and data layers without having to pass the client object through the arguments of every single function. I'm considering setting up a "session" type object using ThreadLocal. That way any function can just say something like: CurrentUser.getRoles(); Is this a good way to do this or is there something else that is a more accepted solution? Thanks!

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• How to get generate WSDL using GroovyWS

  - by James Black

  I am implementing SOAP web services for a commercial application, and I am using GroovyWS to speed up the development. But, when I deploy it on Tomcat, I am not using Grails, as the software has it's own J2EE framework, so how I do I get it to react to wsdl requests? Do I need to write a groovy-based servlet? Ideally I would like the WSDL generated upon request, so I can easily change the interface and see the change. It seems I will miss the annotations that JAX-WS provides for, though, to help fine-tune the WSDL.

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• How to get the request url from HttpServletRequest

  - by Gagan

  Say i make a get request like this: GET http://cotnet.diggstatic.com:6000/js/loader/443/JS_Libraries,jquery|Class|analytics|lightbox|label|jquery-dom|jquery-cookie?q=hello#frag HTTP/1.0 Host: cotnet.diggstatic.com:6000 My servlet takes request like this: HttpServletRequest req; When i debug my server and execute, i get the following: req.getRequestURL().toString() = "http://cotnet.diggstatic.com:6000/js/loader/443/JS_Libraries,jquery%7cClass%7canalytics%7clightbox%7clabel%7cjquery-dom%7cjquery-cookie" req.getRequestURI() = "/js/loader/443/JS_Libraries,jquery%7cClass%7canalytics%7clightbox%7clabel%7cjquery-dom%7cjquery-cookie" req.getQueryString() = "q=hello" How does one get the fragment information ? Also, when i debug the request, i see a uri_ field of type java.net.URI which has the fragment information. This is exactly what i want. How can i get that ?

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• Change spring bean properties at configuration time

  - by Nick Gerakines

  In a spring servlet xml file, I'm using org.springframework.scheduling.quartz.SchedulerFactoryBean to regularly fire a set of triggers. <bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean"> <property name="triggers"> <list> <ref local="AwesomeTrigger" /> <ref local="GreatTrigger" /> <ref local="FantasticTrigger"/> </list> </property> </bean> The issue is that in different environments, I don't want certain triggers firing. Is there a way to include some sort of configuration or variable defined either in my build.properties for the environment or in a spring custom context properties file that assists the bean xml to determine which triggers should be included in the list? That way, for example, AwesomeTrigger would be called in development but not qa.

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• How to make a legacy webapp spring aware at the container level for bean autowire into Servlets?

  - by Pete

  We have a legacy web application (not Spring based) and are looking for best practices to autowire some newer Spring configured (thread safe) service beans into instance variables in several of the legacy servlets. Rewriting every servlet to Spring MVC is out of scope. For testability, we do not want any Spring specific bean lookup code in the Servlets to look up beans by name or similar. Note that we are not concerned about web specific bean scopes such as session or request; all services are singleton scope. Below shows relevant code snippet MyServlet extends LegacyServletSuperclass { private MyThreadSafeServiceBean wantThisToBeAutowiredBySpring; .... }

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• Logic for controll concurrent in block/method

  - by Hlex

  1)My environment is web application, I develop servlet to receive request. A) In some block/method i want to control concurrent to not greater than 5 B) if there are 5 request in that block , the new coming must wait up to 60 second then throws error C) if there are sleep/waiting request more then 30, the 31th request will be throwed an error How I do this? 2)(Optional Question) from above I have to distribute control logic to all clustered host. I plan to use hazelcast to share the control logic (e.g. current counter) I see they provide BlockingQueue & ExectorService but I have no idea how to use in my case. Please recommend if you have idea.

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