after upgrade hibernate 4 to 5 sequence not working and hibernate get next val from hibernate_sequence but I solved it by re-configuring mapping in the HBM file from: <generator class="sequence"> <param name="sequence">PRODUCT_ID_SEQ</param> </generator> to: <generator class="org.hibernate.id.enhanced.SequenceStyleGenerator"> <param name="prefer_sequence_per_entity">true</param> ...
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Oracle Table Flash Back Query
From Oracle Ver. 9i Oracle has introduced Flashback Query feature. It is useful to recover from accidental statement failures. For example, suppose a user accidently deletes rows from a table and commits it also then, using flash back query he can get back the rows. Flashback feature depends upon on...
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What is difference between Abstract classes and interface in JAVA 8?
Interesting to know that now with Java 8 is possible to use a method body of an interface.So in Java 8, the only difference between an interface or an abstract class depends if we want all the methods to be public or not? (Or to implement multiple interfaces in a...
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cargo-maven2-plugin
after using tomcat 7 maven plugin i want to upgrade my app to tomcat 8 to support java 8 but tomcat 8 dont have maven plugin and after serach in google i found Cargo maven plugin that support tomcat 8 and other app server .it is very easy to use ....
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proxy(forward proxy) vs reverse proxy
A reverse proxy is mostly a server-side concept, and is usually used in the context of CDNs (content distribution networks) for caching static HTTP content. A forward proxy is usually a client side concept used for anonymity, to subvert censorship, and (back in the days of dial-up) as a web...
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