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30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
InitialLoggerStoreFactory.java | 100% | 100% | 100% | 100% |
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/*
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* Copyright (C) The Spice Group. All rights reserved.
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*
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* This software is published under the terms of the Spice
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* Software License version 1.1, a copy of which has been included
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* with this distribution in the LICENSE.txt file.
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*/
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package org.codehaus.spice.loggerstore.factories;
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import java.io.InputStream;
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import java.net.URL;
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import java.util.Enumeration;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Properties;
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import org.codehaus.spice.loggerstore.LoggerStore;
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import org.codehaus.spice.loggerstore.LoggerStoreFactory;
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/**
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* This is the initial LoggerStoreFactory tyhat the user accesses to create
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* their LoggerStore when the type is configurable.
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*
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* @author Peter Donald
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* @author <a href="mailto:mauro.talevi at aquilonia.org">Mauro Talevi</a>
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* @version $Revision: 1.1 $ $Date: 2003/11/19 18:22:44 $
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*/
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public class InitialLoggerStoreFactory |
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implements LoggerStoreFactory
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{ |
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/**
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* The INITIAL_FACTORY key. Used to define the classname of the initial
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* LoggerStoreFactory. If not specified will attempt to use the
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* ConsoleLoggerStoreFactory.
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*/
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public static final String INITIAL_FACTORY = "org.codehaus.spice.loggerstore.factory"; |
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/**
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* The name of properties file loaded from ClassLoader. This property file
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* will be used to load default configuration settings if user failed to
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* specify them.
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*/
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public static final String DEFAULT_PROPERTIES = "META-INF/spice/loggerstore.properties"; |
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/**
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* Create LoggerStore by first determining the correct LoggerStoreFactory to
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* use and then delegating to that factory. See Class Javadocs for the
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* process of locating LoggerStore.
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*
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* @param config the input configuration
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* @return the LoggerStore
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* @throws Exception if unable to create the LoggerStore for any reason.
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*/
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public LoggerStore createLoggerStore( final Map config )
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throws Exception
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{ |
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final ClassLoader classLoader = getClassLoader( config ); |
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String type = (String)config.get( INITIAL_FACTORY ); |
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Map data = config; |
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if( null == type ) |
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{ |
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data = loadDefaultConfig( data, classLoader ); |
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type = (String)data.get( INITIAL_FACTORY ); |
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} |
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final LoggerStoreFactory factory = |
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createLoggerStoreFactory( type, classLoader ); |
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return factory.createLoggerStore( data );
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} |
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/**
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* Retrieve the classloader from data map. If no classloader is specified
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* then use ContextClassLoader. If ContextClassLoader not specified then use
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* ClassLoader that loaded this class.
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*
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* @param data the configuration data
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* @return a ClassLoader
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*/
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private ClassLoader getClassLoader( final Map data )
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{ |
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ClassLoader loader = (ClassLoader)data.get( |
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ClassLoader.class.getName() );
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if( null == loader ) |
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{ |
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loader = Thread.currentThread().getContextClassLoader(); |
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if( null == loader ) |
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{ |
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loader = InitialLoggerStoreFactory.class.getClassLoader();
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} |
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} |
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return loader;
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} |
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/**
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* Load the default properties for LoggerStoreFactory.
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*
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* @param initial the input data
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* @param classLoader the classLoader to load properties files from
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* @return the new configuration data
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* @throws Exception if unable to load properties
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*/
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private Map loadDefaultConfig( final Map initial,
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final ClassLoader classLoader ) |
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throws Exception
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{ |
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final HashMap map = new HashMap();
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final Enumeration resources = |
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classLoader.getResources( DEFAULT_PROPERTIES ); |
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while( resources.hasMoreElements() )
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{ |
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final URL url = (URL)resources.nextElement(); |
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final InputStream stream = url.openStream(); |
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final Properties properties = new Properties();
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properties.load( stream ); |
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map.putAll( properties ); |
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} |
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map.putAll( initial ); |
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return map;
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} |
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/**
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* Create a {@link LoggerStoreFactory} for specified loggerType.
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*
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* @param type the type of the Logger to use.
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* @return the created {@link LoggerStoreFactory}
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*/
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private LoggerStoreFactory createLoggerStoreFactory( final String type,
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final ClassLoader classLoader ) |
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{ |
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if( null == type ) |
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{ |
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final String message = "No LoggerStoreFactory type specified.";
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throw new IllegalStateException( message ); |
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} |
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try
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{ |
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final Class clazz = classLoader.loadClass( type ); |
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return (LoggerStoreFactory)clazz.newInstance();
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} |
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catch( final Exception e )
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{ |
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final String message = |
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"Failed to created LoggerStoreFactory " + type;
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throw new IllegalArgumentException( message ); |
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} |
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} |
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} |
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