Here is some Java stuff I’ve written over the last year for Daily Fratze. All of the stuff is in use on Daily Fratze since June 2011. java-akismet java-akismet is a simple client for Akismet based on the latest version of Apache HttpComponents. java-oembed I really like the idea of oEmbed: A mechanism for auto […]
Every 8 hours i got a Hibernate exception “Cannot release connection” within a Java application using Hibernate, Apache DBCP on Tomcat: org.hibernate.exception.GenericJDBCException: Cannot release connection at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103) at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29) .. .. Caused by: java.sql.SQLException: Already closed. Not only that the messages polluted my inbox, the exception was visible to the enduser, […]
It’s truly easy to generate a SSL certificate for example to use with tomcat (see here). This certificate is invalid as it is self-signed by you and it often doesn’t match the hostname. This is no problem when your access the project with a browser, with more or less jumps through hoops you accept the […]
MySQL has an aes_encrypt/aes_decrypt pair of functions (Encryption and Compression Functions) that enable encryption and decryption of data using the official AES algorithm. The functions are easy to use (select AES_ENCRYPT(‘text’,’password’)) and the result is easy to store (insert into secrets values HEX(AES_ENCRYPT(‘text’,’password’))) as hex values. I used this technique for a while but i […]
I used to use mod_xsendfile by Nils Maier, who’s Homepage doesn’t seem to exist anymore, to send files from Ruby proxied by Apache respectively powered by modrails. Those files shouldn’t be in any public www directory as authorization needs to be checked, but are accessed very often so that streaming them is not an option. […]