High-performance Java — Persistence.pdf Updated
A hidden feature in these Pokémon games is the ability to tell a certain NPC four specific words or phrases using the easy chat system in order to unlock special rewards. Which words are required are unique per save file.
In Diamond, Pearl, and Platinum these rewards include 8 different special PC box wallpapers. The NPC to speak to is located on the 3rd floor of the Jubilife TV station.
In HeartGold and SoulSilver, rewards include 8 different PC box wallpapers plus 3 different Pokémon eggs. The NPC to speak to is located in the Violet City Pokémon Center.
The original distribution of these passwords was via the Pokémon Daisuki Club, a defunct, Japanese-exclusive official fan club website.
Below is both a calculator to generate the passwords for your specific save file, an in-depth explanation of how the password check system functions, and a full dump of the relevant word data.
High-performance Java — Persistence.pdf Updated
By respecting the relational database engine and understanding the internals of Hibernate/JPA, you can achieve performance that rivals hand-coded JDBC, while retaining the productivity benefits of the object-relational mapping.
Database queries can be a major bottleneck in Java persistence. To optimize queries: High-performance Java Persistence.pdf
An e-commerce site saw timeouts during Black Friday. The team found that loading a ShoppingCart entity triggered lazy loading of CartItem , Product , Discount , and Inventory across 50 queries. After applying the "Dynamic Fetching" strategies from , they reduced the transaction to 2 queries and a single JOIN FETCH . Time per request dropped from 4 seconds to 50ms. The team found that loading a ShoppingCart entity
It is important to note that while many search for free copies, the author (Vlad Mihalcea) actively maintains this as a commercial/paid resource. However, a wealth of information is legally available: It is important to note that while many
If you are a Java developer using Hibernate or JPA, this book isn't just a recommendation—it’s a prerequisite for your next promotion.
And there it was. A single, highlighted paragraph: "The difference between a toy application and a production system is not the database—it is the developer's understanding of the persistence context. Use JOIN FETCH for single aggregations, a @EntityGraph for complex trees, and never, ever loop over lazy associations inside a transaction."
