XMLConfigurator (Proxool API})

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org.logicalcobwebs.proxool.configuration
Class XMLConfigurator

java.lang.Object
  org.xml.sax.helpers.DefaultHandler
      org.logicalcobwebs.proxool.configuration.XMLConfigurator

All Implemented Interfaces:: org.xml.sax.ContentHandler, org.xml.sax.DTDHandler, org.xml.sax.EntityResolver, org.xml.sax.ErrorHandler

public class XMLConfigurator
extends org.xml.sax.helpers.DefaultHandler
extends org.xml.sax.helpers.DefaultHandler

A SAX 2 ContentHandler that can configure Proxool from an XML source.

This is just a ContentHandler, so you must associate it with a SAX parser for it to actually do anything. If you have JAXP available JAXPConfigurator will do this for you.

Properties that you pass on to the delegate driver have to be treated specially. They must be contained within a <driver-properties> element.

See the Proxool properties for documentation on the available configuration properties.

Example configuration:

 <proxool>
     <alias>apple</alias>
     <driver-url>jdbc:hsqldb:.</driver-url>
     <driver-class>org.hsqldb.jdbcDriver</driver-class>
     <driver-properties>
         <property name="user" value="abc" />
         <property name="password" value="def" />
     </driver-properties>
     <house-keeping-sleep-time>40000</house-keeping-sleep-time>
     <house-keeping-test-sql>select CURRENT_DATE</house-keeping-test-sql>
     <maximum-connection-count>10</maximum-connection-count>
     <minimum-connection-count>3</minimum-connection-count>
     <maximum-connection-lifetime>18000000</maximum-connection-lifetime> <!-- 5 hours -->
     <simultaneous-build-throttle>5</simultaneous-build-throttle>
     <recently-started-threshold>40000</recently-started-threshold>
     <overload-without-refusal-lifetime>50000</overload-without-refusal-lifetime>
     <maximum-active-time>60000</maximum-active-time>
     <verbose>true</verbose>
     <trace>true</trace>
     <fatal-sql-exception>ORA-1234</fatal-sql-exception>
     <prototype-count>2</prototype-count>
 </proxool>

When the parser reaches the end of the <proxool> element the pool is automatically registered. You can contain the <proxool> element in any other elements as you wish. And the <proxool> element can occur as many times as you wish. This allows you to use an XML file that configures your whole application as the source. This configurator will ignore everything apart from the elements contained within the <proxool> element.

Validation
A couple of additional steps are required if you want your SAX parser to validate your Proxool xml confguration:

Put your proxool configuration elements inside a root proxool-config element. The document must adhere to the Proxool dtd.
Add a DOCTYPE entry to your xml with a system id containing the absolute url to the Proxool dtd. The Proxool jar contains a copy of the Proxool dtd in the confguration package. You can reference that with a jar url like this:
<!DOCTYPE proxool-config SYSTEM "jar:file:///C:/Proxool/lib/proxool.jar!/org/logicalcobwebs/proxool/configuration/proxool.dtd">
Configure your parser to be validating. In the JAXPConfigurator this is done by passing true as the second arghument to any of the configure methods.

This class is not thread safe.

Version:: $Revision: 1.17 $, $Date: 2003/03/05 23:28:56 $
Author:: billhorsman, $Author: billhorsman $ (current maintainer)

Constructor Summary
`XMLConfigurator()`

Method Summary
`void`	`characters(char[] chars, int start, int length)`
`void`	`endElement(java.lang.String uri, java.lang.String lname, java.lang.String qname)`
`void`	`error(org.xml.sax.SAXParseException e)`
`void`	`fatalError(org.xml.sax.SAXParseException e)`
`void`	`startElement(java.lang.String uri, java.lang.String lname, java.lang.String qname, org.xml.sax.Attributes attributes)`
`void`	`warning(org.xml.sax.SAXParseException e)`

Methods inherited from class org.xml.sax.helpers.DefaultHandler
`endDocument, endPrefixMapping, ignorableWhitespace, notationDecl, processingInstruction, resolveEntity, setDocumentLocator, skippedEntity, startDocument, startPrefixMapping, unparsedEntityDecl`

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail