BowerStudios.com

Output:
Zero ( 0 ) is false
Negative decimal ( -1.5 ) is true
Negative whole number ( -1 ) is true
One ( 1 ) is true
Positive decimal ( 1.5 ) is true
Empty string ( ) is false
Empty list ( [] ) is false
Empty hash ( [:] ) is false
Lower character ( a ) is true
Upper character ( A ) is true
Null ( null ) is false

Interesting Metrics Libraries:

• Grails Yammer Metrics
• Yammer on Javacodegeeks.com
• Yammer metrics docs
• Grails Melody plugin
• Java Melody Monitoring

• Grails Worst Practices - Burt Beckwith
• Grails Transactions - Burt Beckwith
• Grails Transactions - Burt Beckwith
• Gorm Performance, Customization and Monitoring - Burt Beckwith
• Tuning Your Grails Applications - Peter Ledbrook
• Grails Plugin Best Practices - Burt Beckwith
• Using Spring in Grails - Burt Beckwith
• Application Architectures with Grails - Peter Ledbrook

• LinuxBsDos.com
• EFF.org
• Encrypted File Systems

Due to the Heartbleed bug in OpenSsl, I wanted to regenerate my ssl keys.
I did so in the normal fashion by using:
openssl genrsa -des3 -out bowerstudios.com.key 2048
Next I created the csr:
openssl req -new -key bowerstudios.com.key -out bowerstudios.com.csr

I verified they matched with:
openssl req -noout -modulus -in bowerstudios.com.csr | openssl md5
openssl rsa -noout -modulus -in bowerstudios.com.key | openssl md5

I created the reissue request and approved it through the rapid ssl flow.

When I received the new cert, Apache failed to startup. Checking the md5 of the new cert showed it did not match.
openssl x509 -noout -modulus -in bowerstudios.com.cert | openssl md5

Thinking I mistyped something, I went through the entire process again, and encountered the same error.

However, I noticed the md5 of the certificate from the second attempt, matched the md5 of the priv key and csr from the first attempt. When I matched the 3 with the same md5 from both attempts, my server started up successfully.

Finally, you should check into revoking the other certs.

I like VirtualBox and think its a great tool, however, this was necessary for me because of work.

Installation

Installing Vmware Workstation 10 on Ubuntu 12 (Works for Ubuntu 13 as well)

Conversion

You can convert VirtualBox images to Vmware ones with the following process:

1. Export the machine from VirtualBox as a standard ova
2. Import to Vmware, which will fail right away, until you hit "Retry" whereupon it will work just fine
3. Look at the settings and remove anything that looks unnecessary (Floppy controller, sound card if it's a server)
4. Start the vm, you may have to resolve a hardware issue (ide mounted in wrong location or some such)
5. Install the vmware tools
6. Optionally, uninstall virtualbox-tools

Vmware Fusion network settings

If you want to match an apple wielding colleagues vmware fusion network settings, you can find your colleagues network setting on their mac at: /Library/Preferences/VMware Fusion

Windows Guest Display Resolution

If you are running a Windows Guest, you can set any resolution of the Desktop by using VMwareResolutionSet.exe
I have two scripts that I can run on a windows Host based upon if I want a full size screen or a half-sized (width):
full:
"C:\Program Files\VMware\VMware Tools\VMwareResolutionSet.exe" 0 1 , 0 0 1900 970
half:
"C:\Program Files\VMware\VMware Tools\VMwareResolutionSet.exe" 0 1 , 0 0 940 970

Ubuntu Key mapping restoration after exiting a vm

If you are having difficulties with the Ctrl/OS/Alt keys after coming out of a vm, you might be experiencing this issue. You can restore some functionality by entering the following command in the terminal:
setxkbmap

References:

• howtogeek.com
• Networks in Vmware Fusion
• VMwareResolutionSet.exe

I needed to bring in some legacy templates, but got this crazy error:

2014-03-31 11:51:01,762 [task-scheduler-3] INFO grails.app.services.com.infinum.App.mail.AppMessageService Failed to send Message 00bee7d7-a0f9-4a47-914f-23336a4cea0f
org.apache.velocity.exception.MethodInvocationException: Invocation of method 'get' in class com.infinum.app.Message threw exception org.springframework.orm.hibernate3.HibernateSystemException: Provided id of the wrong type for class com.infinum.app.Message. Expected: class java.util.UUID, got class java.lang.String; nested exception is org.hibernate.TypeMismatchException: Provided id of the wrong type for class com.infinum.app.Message. Expected: class java.util.UUID, got class java.lang.String at 76390f25-7827-46fb-b9ee-2634ab7246f4-b[line 49, column 11]
at org.apache.velocity.runtime.parser.node.ASTIdentifier.execute(ASTIdentifier.java:223)
at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369)
at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
at org.apache.velocity.Template.merge(Template.java:356)
at org.apache.velocity.Template.merge(Template.java:260)
at org.apache.velocity.Template$merge.call(Unknown Source)
at com.infinum.app.mail.VelocityService.generateContentFromTemplate(VelocityService.groovy:64)
...
Caused by: org.springframework.orm.hibernate3.HibernateSystemException: Provided id of the wrong type for class com.infinum.app.Message. Expected: class java.util.UUID, got class java.lang.String; nested exception is org.hibernate.TypeMismatchException: Provided id of the wrong type for class com.infinum.app.Message. Expected: class java.util.UUID, got class java.lang.String
at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:690)
at org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:412)
at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:411)
at org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374)
at org.springframework.orm.hibernate3.HibernateTemplate.get(HibernateTemplate.java:512)
at org.springframework.orm.hibernate3.HibernateTemplate.get(HibernateTemplate.java:506)
at org.springframework.orm.hibernate3.HibernateOperations$get.call(Unknown Source)
at org.codehaus.groovy.grails.orm.hibernate.HibernateGormStaticApi.get(HibernateGormEnhancer.groovy:182)
at com.infinum.app.Message.get(Message.groovy)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1259)
at org.apache.velocity.runtime.parser.node.GetExecutor.execute(GetExecutor.java:117)
at org.apache.velocity.util.introspection.UberspectImpl$VelGetterImpl.invoke(UberspectImpl.java:539)
at org.apache.velocity.runtime.parser.node.ASTIdentifier.execute(ASTIdentifier.java:198)
... 46 more
Caused by: org.hibernate.TypeMismatchException: Provided id of the wrong type for class com.infinum.app.Message. Expected: class java.util.UUID, got class java.lang.String
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:135)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:1090)
at org.hibernate.impl.SessionImpl.get(SessionImpl.java:1005)
at org.hibernate.impl.SessionImpl.get(SessionImpl.java:998)
at org.springframework.orm.hibernate3.HibernateTemplate$1.doInHibernate(HibernateTemplate.java:519)
at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:406)
... 60 more


I received the error message twice. What it boiled down to was my having another property in the Message class that was named the same as the old system, but returned a different type in one instance. In another instance, the other property was not present at all in my new class. The takeaway is that in both cases, the error was not with the "id" column, but another altogether.

• Apache Commons Config
• ApacheCommonsConfigPropertySource for using Apache Commons Config with Spring Property Sources
• Loading Application Properties from a Database
• MutablePropertySources Api
• Grails Environment Api
• Grails Environment Source
• EnumerablePropertySource Api

From DZone

An interesting deck of slides from Peter Ledbrook.