To install java and have it updated automatically just use the WebUpd8 PPA. sudo apt-add-repository ppa:webupd8team/java sudo apt-get update sudo apt-get install oracle-java8-installer After that you have java 8 installed and it is updated regularly.
Ubuntu java installation/automatic updates Read More »
On some remote machines my SSH connections hangs if they idle for a while. To get around that you can add a flag to send a keepalive signal reularly. Just open your ~/.ssh/config and add the following for the host that hangs: Host example.com ServerAliveInterval 60 Or to enable it for all hosts: Host *
SSH timeouts on idle connections Read More »
If you have enough RAM you can use it to store temporary file. To mount /tmp as a ramdisk add the follwing line to your /etc/fstab: none /tmp tmpfs defaults 0 0 Of course you have to edit the file as root. After that reboot or mount it manually. I used the following line: sudo rm
Mount /tmp as ramdisk Read More »
After every installation of Ubuntu I try to get the GNOME 2 behavior back. This is very annoying and costs lot of time and research. Last months I tried xubuntu and xfce4. Both are very annoying and no real solutions for a productive desktop solution. I haven’t used KDE for years because I always preferred
KDE – the better desktop Read More »
I often catch myself writing info-messages because jboss is configured to info-mode by default. By adding the following few lines you can make your application use debug mode: <subsystem xmlns=”urn:jboss:domain:logging:2.0″> … <!– add begin –> <console-handler name=”DEBUGCONSOLE”> <level name=”DEBUG” /> <formatter> <pattern-formatter pattern=”%d{HH:mm:ss,SSS} %-5p [%c] (%F:%L) %s%E%n” /> </formatter> </console-handler> <logger category=”pm.mbo” use-parent-handlers=”false”> <level name=”DEBUG”
Make your webapplication log debug messages under jboss Read More »
To bootstrap javax.validation.Validator you can simply use the following code: final ValidatorFactory factory = Validation.buildDefaultValidatorFactory(); final Validator validator = factory.getValidator(); For further information documentation see for version 5.1 http://docs.jboss.org/hibernate/validator/5.1/reference/en-US/html/chapter-bootstrapping.html#section-retrieving-validator-factory-validator for version 4.3 http://docs.jboss.org/hibernate/validator/4.3/reference/en-US/html/validator-bootstrapping.html#section-validator-instance
Create instance of javax.validation.Validator manually Read More »
To add “nothing selected” to a dynamic h:selectOneMenu you can use the noSelectionOption=”true” attribute like this: <h:selectOneMenu value=”#{myBean.someItem}”> <f:selectItem itemLabel=”—” noSelectionOption=”true” /> <f:selectItems value={myBean.items}” /> </h:selectOneMenu>
JSF SelectOneMenu with Nothing Selected Read More »
When you write a producer for FacesContext like this @Produces public FacesContext produce() { return FacesContext.getCurrentInstance(); } do not forget to specify a scope! Otherwise you will get an Exception when accessing the object when it is injected in a session scoped bean. So the correct version looks like this: @Produces @RequestScoped public FacesContext produce()
Injectable FacesContext Read More »
If you don’t want to send these headers with every response you have to disable them in your configuration file (standalone.xml). I just removed the following lines from my undertow subsystem (urn:jboss:domain:undertow:1.1): <filter-ref name=”server-header”/> <filter-ref name=”x-powered-by-header”/> … <response-header name=”server-header” header-name=”Server” header-value=”WildFly/8″/> <response-header name=”x-powered-by-header” header-name=”X-Powered-By” header-value=”Undertow/1″/> After a server restart the headers were gone.
Get rid of Wildfly/JBoss headers “Server” and “X-Powered-By” Read More »
I’m always using the eclipse formatter but formatting XHTML or HTML files simply destroys readability with default settings. To get rid of this simply change the line width to 999 in Web -> HTML Files -> Editor -> Line width. You can also turn it of for XML under XML > XML Files > Editor
Stop HTML and XHTML line wrapping Read More »