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Java Source Code / Java Documentation » Content Management System » webman » de.webman.util.registry

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

de.webman.util.registry .Registry

Registry

public class Registry (Code)

The central registry class. Implemented as singleton.

The normal way to use managers in webman is to request an instance of the Registry, using the Registry.getInstance() method, and looking up the Manager from the resulting instance using the manager's id. For example:

 MyManager reg = (MyManager)Registry.getInstance().lookup("acl");
 Boolean authgrp = (Boolean)reg.get("AUTH_GROUP", Boolean.FALSE);

Since webman is a (kind of) webapplication and webapplications live in hostile environment (at least from the point of configuration at start up time), the configuration of the Registry is a bit weird. It is done using a xml file read in the very first time, the Registry is configured. Any following tries to configure it are simply ignored (see Registry.setConfiguration() ). The structure of the xml config file is as follows:

 <!ELEMENT registry (factories?)>
 <!ELEMENT factories (registry*)>
 <!ELEMENT manager #EMPTY>
 <!ATTLIST manager load-scheme (start|lazy) "lazy"
 factory-class CDATA #REQUIRED>

Example:

author:
Gregor Klinke
version:
$Revision: 1.2 $

Field Summary
final public static String	LAZY_LOAD_SCHEME
final public static String	START_LOAD_SCHEME

Method Summary
public static Registry	getInstance()
public Manager	lookup(String mgrid) lookup a manager using the registry id.
public boolean	setConfiguration(String _basedir, String _cfg) sets the configuration file of the instance.

Field Detail

LAZY_LOAD_SCHEME
final public static String LAZY_LOAD_SCHEME(Code)
	denotes a lazy manager load

START_LOAD_SCHEME
final public static String START_LOAD_SCHEME(Code)
	denotes a manager load on start

Method Detail

getInstance
public static Registry getInstance()(Code)
	returns the singleton instance never `null`

lookup
public Manager lookup(String mgrid) throws RegistryException(Code)
	lookup a manager using the registry id. The manager is allocated newly (if not done yet), otherwise the cached instance of the manager is returned. Parameters: mgrid - the manager id the found manager or `null` if no such manageris known throws: RegistryException - if anything fails

setConfiguration
public boolean setConfiguration(String _basedir, String _cfg) throws IOException, RegistryException(Code)
	sets the configuration file of the instance. This is can be done only once. Parameters: _basedir - the absolute directory path to the base directory ofthe application Parameters: _cfg - the path to the configuration file relative to _basedir return `true` if the manager has not beenconfigured before, and `false`, if it has (theconfiguration attempt) has been ignored). throws: IOException - if the XML config file could not be read

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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