Download Serialization and Persistent Objects: Turning Data by Jiri Soukup, Petr Macháček PDF

By Jiri Soukup, Petr Macháček

Recently, the strain for speedy processing and effective garage of enormous info with complicated kinfolk elevated past the potential of conventional databases. general examples contain iPhone purposes, machine aided layout – either electric and mechanical, biochemistry purposes, and incremental compilers. Serialization, that's occasionally utilized in such occasions is notoriously tedious and blunder prone.

In this ebook, Jiri Soukup and Petr Macháček express intimately the right way to write courses which shop their inner information immediately and transparently to disk. including precise info constitution libraries which deal with relatives between items as first class entities, and with a UML class-diagram generator, the center program code is way simplified. The benchmark bankruptcy indicates a regular instance the place continual facts is quicker by way of the order of importance than with a conventional database, in either traversing and having access to the data.

The authors discover and make the most complex positive factors of object-oriented languages in a intensity not often obvious in print sooner than. but, you as a reader desire just a simple wisdom of C++, Java, C#, or target C. those languages are really related with recognize to persistency, and the authors clarify their modifications the place necessary.

The e-book pursuits expert programmers engaged on any purposes, it teaches you ways to layout your individual continual info or find out how to use the present applications successfully. Researchers in parts like language layout, compiler development, functionality review, and no-SQL functions will discover a wealth of novel rules and invaluable implementation assistance. less than http://www.codefarms.com/bk, you'll find a weblog and different info, together with a downloadable zip dossier with the resources of the entire listings which are longer than simply a couple of traces – able to assemble and run.

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Extra info for Serialization and Persistent Objects: Turning Data Structures into Efficient Databases

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The online example20 runs fine up to 1,000 books, but for more books it crashes with stack overflow. 9. In case (2) there is just a reference between Book and Container. bat runs it. In order to run it for 2000 books, type: run 2000. 5 Languages with Built-In Persistence Fig. 8 The concept of Java serialization obj #1 class A descript. b=obj #2 class C descript. class B descript. cost value #2 21 class A { B b; int num; } class B { float cost; } class C extends B { A ax; A ay; A az; } ax = #1 A1 ay = 0 az= obj #3 class A b 0 C2 ax b=0 az num value #3 num value #1 A3 0 reference is replaced by index search in a hash table, which certainly takes more time to execute, and requires additional internal data space.

1 Adding Members and Methods to a Class Both when making objects persistent and when building intrusive data structures (see Chap. 3), we need to add capabilities to the existing classes. That implies additional methods and members to support these capabilities. There are four ways to do it: from below, from above, inserting them inside, and using a linked storage. Examples in this book mostly inside the required methods and members, but keep in mind that this is not the only way. In some situations one of the other options may be a better solution.

We derive a special class from the class we want to expand and add the members and methods there. The disadvantage is that in calls to new() and possibly other methods you have to cast to the expanded class (starting with Exp_. ). 2 Hidden Pointers The first step to implementing any style of persistence is to understand the internal representation of objects. In the early years of C++ there was a multitude of compilers, each with its own quirks and representation of objects. 5 The C++ standard does not specify the internal implementation of objects, but most compilers today use the model shown in Fig.

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