mirror of
https://github.com/berkeleydb/libdb.git
synced 2024-11-17 01:26:25 +00:00
411 lines
12 KiB
HTML
411 lines
12 KiB
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>Tutorial Introduction</title>
|
|||
|
|
<link rel="stylesheet" href="gettingStarted.css" type="text/css" />
|
|||
|
|
<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
|
|||
|
|
<link rel="start" href="index.html" title="Berkeley DB Collections Tutorial" />
|
|||
|
|
<link rel="up" href="intro.html" title="Chapter 1. Introduction" />
|
|||
|
|
<link rel="prev" href="developing.html" title="Developing a DB Collections Application" />
|
|||
|
|
<link rel="next" href="BasicProgram.html" title="Chapter 2. The Basic Program" />
|
|||
|
|
</head>
|
|||
|
|
<body>
|
|||
|
|
<div xmlns="" class="navheader">
|
|||
|
|
<div class="libver">
|
|||
|
|
<p>Library Version 11.2.5.2</p>
|
|||
|
|
</div>
|
|||
|
|
<table width="100%" summary="Navigation header">
|
|||
|
|
<tr>
|
|||
|
|
<th colspan="3" align="center">Tutorial Introduction</th>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td width="20%" align="left"><a accesskey="p" href="developing.html">Prev</a> </td>
|
|||
|
|
<th width="60%" align="center">Chapter 1.
|
|||
|
|
Introduction
|
|||
|
|
</th>
|
|||
|
|
<td width="20%" align="right"> <a accesskey="n" href="BasicProgram.html">Next</a></td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
<hr />
|
|||
|
|
</div>
|
|||
|
|
<div class="sect1" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h2 class="title" style="clear: both"><a id="tutorialintroduction"></a>Tutorial Introduction</h2>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
Most of the remainder of this document illustrates the use of the
|
|||
|
|
DB Java Collections API by presenting a tutorial that describes usage of the API.
|
|||
|
|
This tutorial builds a shipment database, a familiar example from classic
|
|||
|
|
database texts.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The examples illustrate the following concepts of the DB Java Collections API:
|
|||
|
|
</p>
|
|||
|
|
<div class="itemizedlist">
|
|||
|
|
<ul type="disc">
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
Object-to-data <span class="emphasis"><em>bindings</em></span>
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
The database <span class="emphasis"><em>environment</em></span>
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="emphasis"><em>Databases</em></span> that contain key/value records
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="emphasis"><em>Secondary index</em></span> databases that contain index keys
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
Java <span class="emphasis"><em>collections</em></span> for accessing databases and
|
|||
|
|
indices
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="emphasis"><em>Transactions</em></span> used to commit or undo database
|
|||
|
|
changes
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
</ul>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
The examples build on each other, but at the same time the
|
|||
|
|
source code for each example stands alone.
|
|||
|
|
</p>
|
|||
|
|
<div class="itemizedlist">
|
|||
|
|
<ul type="disc">
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<a class="xref" href="BasicProgram.html" title="Chapter 2. The Basic Program">
|
|||
|
|
The Basic Program
|
|||
|
|
</a>
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<a class="xref" href="UsingSecondaries.html" title="Chapter 3. Using Secondary Indices">
|
|||
|
|
Using Secondary Indices
|
|||
|
|
</a>
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<a class="xref" href="Entity.html" title="Chapter 4. Using Entity Classes">
|
|||
|
|
Using Entity Classes
|
|||
|
|
</a>
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<a class="xref" href="Tuple.html" title="Chapter 5. Using Tuples">
|
|||
|
|
Using Tuples
|
|||
|
|
</a>
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<a class="xref" href="SerializableEntity.html" title="Chapter 6. Using Serializable Entities">
|
|||
|
|
Using Serializable Entities
|
|||
|
|
</a>
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
</ul>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
The shipment database consists of three database stores: the
|
|||
|
|
part store, the supplier store, and the shipment store. Each store
|
|||
|
|
contains a number of records, and each record consists of a key and
|
|||
|
|
a value.
|
|||
|
|
</p>
|
|||
|
|
<div class="informaltable">
|
|||
|
|
<table border="1" width="80%">
|
|||
|
|
<colgroup>
|
|||
|
|
<col />
|
|||
|
|
<col />
|
|||
|
|
<col />
|
|||
|
|
</colgroup>
|
|||
|
|
<thead>
|
|||
|
|
<tr>
|
|||
|
|
<th>Store</th>
|
|||
|
|
<th>Key</th>
|
|||
|
|
<th>Value</th>
|
|||
|
|
</tr>
|
|||
|
|
</thead>
|
|||
|
|
<tbody>
|
|||
|
|
<tr>
|
|||
|
|
<td>Part</td>
|
|||
|
|
<td>Part Number</td>
|
|||
|
|
<td>Name, Color, Weight, City</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>Supplier</td>
|
|||
|
|
<td>Supplier Number</td>
|
|||
|
|
<td>Name, Status, City</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>Shipment</td>
|
|||
|
|
<td>Part Number, Supplier Number</td>
|
|||
|
|
<td>Quantity</td>
|
|||
|
|
</tr>
|
|||
|
|
</tbody>
|
|||
|
|
</table>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
In the example programs, Java classes containing the fields
|
|||
|
|
above are defined for the key and value of each store:
|
|||
|
|
<code class="classname">PartKey</code>,
|
|||
|
|
<code class="classname">PartData</code>,
|
|||
|
|
<code class="classname">SupplierKey</code>,
|
|||
|
|
<code class="classname">SupplierData</code>,
|
|||
|
|
<code class="classname">ShipmentKey</code> and <code class="classname">ShipmentData</code>. In
|
|||
|
|
addition, because the Part's Weight field is itself composed of two
|
|||
|
|
fields — the weight value and the unit of measure — it is
|
|||
|
|
represented by a separate <code class="classname">Weight</code> class. These classes will
|
|||
|
|
be defined in the first example program.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
In general the DB Java Collections API uses bindings to
|
|||
|
|
describe how Java objects are stored. A binding defines the stored
|
|||
|
|
data syntax and the mapping between a Java object and the stored
|
|||
|
|
data. The example programs show how to create different types of
|
|||
|
|
bindings, and explains the characteristics of each type.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The following tables show the record values that are used in
|
|||
|
|
all the example programs in the tutorial.
|
|||
|
|
<span>
|
|||
|
|
|
|||
|
|
</span>
|
|||
|
|
</p>
|
|||
|
|
<div class="informaltable">
|
|||
|
|
<table border="1" width="80%">
|
|||
|
|
<colgroup>
|
|||
|
|
<col />
|
|||
|
|
<col />
|
|||
|
|
<col />
|
|||
|
|
<col />
|
|||
|
|
<col />
|
|||
|
|
</colgroup>
|
|||
|
|
<thead>
|
|||
|
|
<tr>
|
|||
|
|
<th>Number</th>
|
|||
|
|
<th>Name</th>
|
|||
|
|
<th>Color</th>
|
|||
|
|
<th>Weight</th>
|
|||
|
|
<th>City</th>
|
|||
|
|
</tr>
|
|||
|
|
</thead>
|
|||
|
|
<tbody>
|
|||
|
|
<tr>
|
|||
|
|
<td>P1</td>
|
|||
|
|
<td>Nut</td>
|
|||
|
|
<td>Red</td>
|
|||
|
|
<td>12.0 grams</td>
|
|||
|
|
<td>London</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>P2</td>
|
|||
|
|
<td>Bolt</td>
|
|||
|
|
<td>Green</td>
|
|||
|
|
<td>17.0 grams</td>
|
|||
|
|
<td>Paris</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>P3</td>
|
|||
|
|
<td>Screw</td>
|
|||
|
|
<td>Blue</td>
|
|||
|
|
<td>17.0 grams</td>
|
|||
|
|
<td>Rome</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>P4</td>
|
|||
|
|
<td>Screw</td>
|
|||
|
|
<td>Red</td>
|
|||
|
|
<td>14.0 grams</td>
|
|||
|
|
<td>London</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>P5</td>
|
|||
|
|
<td>Cam</td>
|
|||
|
|
<td>Blue</td>
|
|||
|
|
<td>12.0 grams</td>
|
|||
|
|
<td>Paris</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>P6</td>
|
|||
|
|
<td>Cog</td>
|
|||
|
|
<td>Red</td>
|
|||
|
|
<td>19.0 grams</td>
|
|||
|
|
<td>London</td>
|
|||
|
|
</tr>
|
|||
|
|
</tbody>
|
|||
|
|
</table>
|
|||
|
|
</div>
|
|||
|
|
<div class="informaltable">
|
|||
|
|
<table border="1" width="80%">
|
|||
|
|
<colgroup>
|
|||
|
|
<col />
|
|||
|
|
<col />
|
|||
|
|
<col />
|
|||
|
|
<col />
|
|||
|
|
</colgroup>
|
|||
|
|
<thead>
|
|||
|
|
<tr>
|
|||
|
|
<th>Number</th>
|
|||
|
|
<th>Name</th>
|
|||
|
|
<th>Status</th>
|
|||
|
|
<th>City</th>
|
|||
|
|
</tr>
|
|||
|
|
</thead>
|
|||
|
|
<tbody>
|
|||
|
|
<tr>
|
|||
|
|
<td>S1</td>
|
|||
|
|
<td>Smith</td>
|
|||
|
|
<td>20</td>
|
|||
|
|
<td>London</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>S2</td>
|
|||
|
|
<td>Jones</td>
|
|||
|
|
<td>10</td>
|
|||
|
|
<td>Paris</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>S3</td>
|
|||
|
|
<td>Blake</td>
|
|||
|
|
<td>30</td>
|
|||
|
|
<td>Paris</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>S4</td>
|
|||
|
|
<td>Clark</td>
|
|||
|
|
<td>20</td>
|
|||
|
|
<td>London</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>S5</td>
|
|||
|
|
<td>Adams</td>
|
|||
|
|
<td>30</td>
|
|||
|
|
<td>Athens</td>
|
|||
|
|
</tr>
|
|||
|
|
</tbody>
|
|||
|
|
</table>
|
|||
|
|
</div>
|
|||
|
|
<div class="informaltable">
|
|||
|
|
<table border="1" width="80%">
|
|||
|
|
<colgroup>
|
|||
|
|
<col />
|
|||
|
|
<col />
|
|||
|
|
<col />
|
|||
|
|
</colgroup>
|
|||
|
|
<thead>
|
|||
|
|
<tr>
|
|||
|
|
<th>Part Number</th>
|
|||
|
|
<th>Supplier Number</th>
|
|||
|
|
<th>Quantity</th>
|
|||
|
|
</tr>
|
|||
|
|
</thead>
|
|||
|
|
<tbody>
|
|||
|
|
<tr>
|
|||
|
|
<td>P1</td>
|
|||
|
|
<td>S1</td>
|
|||
|
|
<td>300</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>P1</td>
|
|||
|
|
<td>S2</td>
|
|||
|
|
<td>300</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>P2</td>
|
|||
|
|
<td>S1</td>
|
|||
|
|
<td>200</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>P2</td>
|
|||
|
|
<td>S2</td>
|
|||
|
|
<td>400</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>P2</td>
|
|||
|
|
<td>S3</td>
|
|||
|
|
<td>200</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>P2</td>
|
|||
|
|
<td>S4</td>
|
|||
|
|
<td>200</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>P3</td>
|
|||
|
|
<td>S1</td>
|
|||
|
|
<td>400</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>P4</td>
|
|||
|
|
<td>S1</td>
|
|||
|
|
<td>200</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>P4</td>
|
|||
|
|
<td>S4</td>
|
|||
|
|
<td>300</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>P5</td>
|
|||
|
|
<td>S1</td>
|
|||
|
|
<td>100</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>P5</td>
|
|||
|
|
<td>S4</td>
|
|||
|
|
<td>400</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td>P6</td>
|
|||
|
|
<td>S1</td>
|
|||
|
|
<td>100</td>
|
|||
|
|
</tr>
|
|||
|
|
</tbody>
|
|||
|
|
</table>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<div class="navfooter">
|
|||
|
|
<hr />
|
|||
|
|
<table width="100%" summary="Navigation footer">
|
|||
|
|
<tr>
|
|||
|
|
<td width="40%" align="left"><a accesskey="p" href="developing.html">Prev</a> </td>
|
|||
|
|
<td width="20%" align="center">
|
|||
|
|
<a accesskey="u" href="intro.html">Up</a>
|
|||
|
|
</td>
|
|||
|
|
<td width="40%" align="right"> <a accesskey="n" href="BasicProgram.html">Next</a></td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td width="40%" align="left" valign="top">Developing a DB Collections Application </td>
|
|||
|
|
<td width="20%" align="center">
|
|||
|
|
<a accesskey="h" href="index.html">Home</a>
|
|||
|
|
</td>
|
|||
|
|
<td width="40%" align="right" valign="top"> Chapter 2.
|
|||
|
|
The Basic Program
|
|||
|
|
</td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
</div>
|
|||
|
|
</body>
|
|||
|
|
</html>
|