Edit File: txnapp.html
<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>Chapter 2. Transactional Application</title> <link rel="stylesheet" href="gettingStarted.css" type="text/css" /> <meta name="generator" content="DocBook XSL Stylesheets V1.62.4" /> <link rel="home" href="index.html" title="Getting Started with Replicated Berkeley DB Applications" /> <link rel="up" href="index.html" title="Getting Started with Replicated Berkeley DB Applications" /> <link rel="previous" href="permmessages.html" title="Permanent Message Handling" /> <link rel="next" href="simpleprogramlisting.html" title="Program Listing" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">Chapter 2. Transactional Application</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="permmessages.html">Prev</a> </td> <th width="60%" align="center"> </th> <td width="20%" align="right"> <a accesskey="n" href="simpleprogramlisting.html">Next</a></td> </tr> </table> <hr /> </div> <div class="chapter" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h2 class="title"><a id="txnapp"></a>Chapter 2. Transactional Application</h2> </div> </div> <div></div> </div> <div class="toc"> <p> <b>Table of Contents</b> </p> <dl> <dt> <span class="sect1"> <a href="txnapp.html#appoverview">Application Overview</a> </span> </dt> <dt> <span class="sect1"> <a href="simpleprogramlisting.html">Program Listing</a> </span> </dt> <dd> <dl> <dt> <span class="sect2"> <a href="simpleprogramlisting.html#main_c">Function: main()</a> </span> </dt> <dt> <span class="sect2"> <a href="simpleprogramlisting.html#create_env_c">Function: create_env()</a> </span> </dt> <dt> <span class="sect2"> <a href="simpleprogramlisting.html#env_init_c">Function: env_init()</a> </span> </dt> <dt> <span class="sect2"> <a href="simpleprogramlisting.html#doloop_c">Function: doloop()</a> </span> </dt> <dt> <span class="sect2"> <a href="simpleprogramlisting.html#printstocks_c"> Function: print_stocks() </a> </span> </dt> </dl> </dd> </dl> </div> <p> In this chapter, we build a simple transaction-protected DB application. Throughout the remainder of this book, we will add replication to this example. We do this to underscore the concepts that we are presenting in this book; the first being that you should start with a working transactional program and then add replication to it. </p> <p> Note that this book assumes you already know how to write a transaction-protected DB application, so we will not be covering those concepts in this book. To learn how to write a transaction-protected application, see the <i class="citetitle">Berkeley DB Getting Started with Transaction Processing</i> guide. </p> <div class="sect1" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h2 class="title" style="clear: both"><a id="appoverview"></a>Application Overview</h2> </div> </div> <div></div> </div> <p> Our application maintains a stock market quotes database. This database contains records whose key is the stock market symbol and whose data is the stock's price. </p> <p> The application operates by presenting you with a command line prompt. You then enter the stock symbol and its value, separated by a space. The application takes this information, writes it to the database. </p> <p> To see the contents of the database, simply press <tt class="literal">return</tt> at the command prompt. </p> <p> To quit the application, type 'quit' or 'exit' at the command prompt. </p> <p> For example, the following illustrates the application's usage. In it, we use entirely fictitious stock market symbols and price values. </p> <pre class="programlisting">> ./simple_txn -h env_home_dir QUOTESERVER> stock1 88 QUOTESERVER> stock2 .08 QUOTESERVER> Symbol Price ====== ===== stock1 88 QUOTESERVER> stock1 88.9 QUOTESERVER> Symbol Price ====== ===== stock1 88.9 stock2 .08 QUOTESERVER> quit ></pre> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="permmessages.html">Prev</a> </td> <td width="20%" align="center"> <a accesskey="u" href="index.html">Up</a> </td> <td width="40%" align="right"> <a accesskey="n" href="simpleprogramlisting.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">Permanent Message Handling </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> Program Listing</td> </tr> </table> </div> </body> </html>
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