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Diffstat (limited to 'src/org/apache/commons/logging/LogSource.java')
| -rw-r--r-- | src/org/apache/commons/logging/LogSource.java | 261 |
1 files changed, 0 insertions, 261 deletions
diff --git a/src/org/apache/commons/logging/LogSource.java b/src/org/apache/commons/logging/LogSource.java deleted file mode 100644 index e3c0603..0000000 --- a/src/org/apache/commons/logging/LogSource.java +++ /dev/null @@ -1,261 +0,0 @@ -/* - * Copyright 2001-2004 The Apache Software Foundation. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -package org.apache.commons.logging; - - -import java.lang.reflect.Constructor; -import java.util.Hashtable; - -import org.apache.commons.logging.impl.NoOpLog; - - -/** - * <p>Factory for creating {@link Log} instances. Applications should call - * the <code>makeNewLogInstance()</code> method to instantiate new instances - * of the configured {@link Log} implementation class.</p> - * - * <p>By default, calling <code>getInstance()</code> will use the following - * algorithm:</p> - * <ul> - * <li>If Log4J is available, return an instance of - * <code>org.apache.commons.logging.impl.Log4JLogger</code>.</li> - * <li>If JDK 1.4 or later is available, return an instance of - * <code>org.apache.commons.logging.impl.Jdk14Logger</code>.</li> - * <li>Otherwise, return an instance of - * <code>org.apache.commons.logging.impl.NoOpLog</code>.</li> - * </ul> - * - * <p>You can change the default behavior in one of two ways:</p> - * <ul> - * <li>On the startup command line, set the system property - * <code>org.apache.commons.logging.log</code> to the name of the - * <code>org.apache.commons.logging.Log</code> implementation class - * you want to use.</li> - * <li>At runtime, call <code>LogSource.setLogImplementation()</code>.</li> - * </ul> - * - * @deprecated Use {@link LogFactory} instead - The default factory - * implementation performs exactly the same algorithm as this class did - * - * @author Rod Waldhoff - * @version $Id: LogSource.java 155426 2005-02-26 13:10:49Z dirkv $ - */ -public class LogSource { - - // ------------------------------------------------------- Class Attributes - - static protected Hashtable logs = new Hashtable(); - - /** Is log4j available (in the current classpath) */ - static protected boolean log4jIsAvailable = false; - - /** Is JDK 1.4 logging available */ - static protected boolean jdk14IsAvailable = false; - - /** Constructor for current log class */ - static protected Constructor logImplctor = null; - - - // ----------------------------------------------------- Class Initializers - - static { - - // Is Log4J Available? - try { - if (null != Class.forName("org.apache.log4j.Logger")) { - log4jIsAvailable = true; - } else { - log4jIsAvailable = false; - } - } catch (Throwable t) { - log4jIsAvailable = false; - } - - // Is JDK 1.4 Logging Available? - try { - if ((null != Class.forName("java.util.logging.Logger")) && - (null != Class.forName("org.apache.commons.logging.impl.Jdk14Logger"))) { - jdk14IsAvailable = true; - } else { - jdk14IsAvailable = false; - } - } catch (Throwable t) { - jdk14IsAvailable = false; - } - - // Set the default Log implementation - String name = null; - try { - name = System.getProperty("org.apache.commons.logging.log"); - if (name == null) { - name = System.getProperty("org.apache.commons.logging.Log"); - } - } catch (Throwable t) { - } - if (name != null) { - try { - setLogImplementation(name); - } catch (Throwable t) { - try { - setLogImplementation - ("org.apache.commons.logging.impl.NoOpLog"); - } catch (Throwable u) { - ; - } - } - } else { - try { - if (log4jIsAvailable) { - setLogImplementation - ("org.apache.commons.logging.impl.Log4JLogger"); - } else if (jdk14IsAvailable) { - setLogImplementation - ("org.apache.commons.logging.impl.Jdk14Logger"); - } else { - setLogImplementation - ("org.apache.commons.logging.impl.NoOpLog"); - } - } catch (Throwable t) { - try { - setLogImplementation - ("org.apache.commons.logging.impl.NoOpLog"); - } catch (Throwable u) { - ; - } - } - } - - } - - - // ------------------------------------------------------------ Constructor - - - /** Don't allow others to create instances */ - private LogSource() { - } - - - // ---------------------------------------------------------- Class Methods - - - /** - * Set the log implementation/log implementation factory - * by the name of the class. The given class - * must implement {@link Log}, and provide a constructor that - * takes a single {@link String} argument (containing the name - * of the log). - */ - static public void setLogImplementation(String classname) throws - LinkageError, ExceptionInInitializerError, - NoSuchMethodException, SecurityException, - ClassNotFoundException { - try { - Class logclass = Class.forName(classname); - Class[] argtypes = new Class[1]; - argtypes[0] = "".getClass(); - logImplctor = logclass.getConstructor(argtypes); - } catch (Throwable t) { - logImplctor = null; - } - } - - - /** - * Set the log implementation/log implementation factory - * by class. The given class must implement {@link Log}, - * and provide a constructor that takes a single {@link String} - * argument (containing the name of the log). - */ - static public void setLogImplementation(Class logclass) throws - LinkageError, ExceptionInInitializerError, - NoSuchMethodException, SecurityException { - Class[] argtypes = new Class[1]; - argtypes[0] = "".getClass(); - logImplctor = logclass.getConstructor(argtypes); - } - - - /** Get a <code>Log</code> instance by class name */ - static public Log getInstance(String name) { - Log log = (Log) (logs.get(name)); - if (null == log) { - log = makeNewLogInstance(name); - logs.put(name, log); - } - return log; - } - - - /** Get a <code>Log</code> instance by class */ - static public Log getInstance(Class clazz) { - return getInstance(clazz.getName()); - } - - - /** - * Create a new {@link Log} implementation, based - * on the given <i>name</i>. - * <p> - * The specific {@link Log} implementation returned - * is determined by the value of the - * <tt>org.apache.commons.logging.log</tt> property. - * The value of <tt>org.apache.commons.logging.log</tt> may be set to - * the fully specified name of a class that implements - * the {@link Log} interface. This class must also - * have a public constructor that takes a single - * {@link String} argument (containing the <i>name</i> - * of the {@link Log} to be constructed. - * <p> - * When <tt>org.apache.commons.logging.log</tt> is not set, - * or when no corresponding class can be found, - * this method will return a Log4JLogger - * if the log4j Logger class is - * available in the {@link LogSource}'s classpath, or a - * Jdk14Logger if we are on a JDK 1.4 or later system, or - * NoOpLog if neither of the above conditions is true. - * - * @param name the log name (or category) - */ - static public Log makeNewLogInstance(String name) { - - Log log = null; - try { - Object[] args = new Object[1]; - args[0] = name; - log = (Log) (logImplctor.newInstance(args)); - } catch (Throwable t) { - log = null; - } - if (null == log) { - log = new NoOpLog(name); - } - return log; - - } - - - /** - * Returns a {@link String} array containing the names of - * all logs known to me. - */ - static public String[] getLogNames() { - return (String[]) (logs.keySet().toArray(new String[logs.size()])); - } - - -} |