root / trunk / libraries / libRemoteServices / src / org / gvsig / remoteClientOld / utils / Logger.java @ 3321
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package org.gvsig.remoteClientOld.utils; |
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import org.apache.log4j.Category; |
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import java.io.CharArrayWriter; |
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import java.io.PrintWriter; |
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import java.io.IOException; |
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import java.util.Properties; |
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/**
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* @author Laura Diaz
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* @version 1.0
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*/
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public class Logger |
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{
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private static final String DEBUG_MAXSIZE_PROPERTY = "log4j.debug.maxsize"; |
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private static final String INFO_MAXSIZE_PROPERTY = "log4j.info.maxsize"; |
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private static Category m_category; |
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private int m_maxSizeDebugMsg; |
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private int m_maxSizeInfoMsg; |
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/**
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* Constructor
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*
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* Protected so, only classes in the same package or descendants can instanciate this
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*/
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protected Logger(String name) |
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{
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m_category = Category.getInstance(name); |
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m_maxSizeDebugMsg = readMaxSizeProperty(DEBUG_MAXSIZE_PROPERTY, 0);
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m_maxSizeInfoMsg = readMaxSizeProperty(INFO_MAXSIZE_PROPERTY, 0);
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} |
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/**
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* Adds a debug message
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*/
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public void debug(String msg) |
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{
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/*
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* Write message to log. If enabled, if the message is too long, it
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* will be truncated.
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*/
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if (m_maxSizeDebugMsg <= 0) |
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{
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m_category.debug(msg + "\n");
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} |
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else {
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if (msg.length() <= m_maxSizeDebugMsg)
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{
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m_category.debug(msg + "\n");
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} |
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else
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{
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StringBuffer sb = new StringBuffer(msg.substring(0, m_maxSizeDebugMsg)); |
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sb.append(" [TRUNCATED BY LOGGER SEE property \"");
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sb.append(DEBUG_MAXSIZE_PROPERTY); |
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sb.append("\"]\n");
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m_category.debug(sb.toString()); |
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} |
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} |
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} |
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/**
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* Adds an info message
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*/
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public void info(String msg) |
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{
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/*
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* Write message to log. If enabled, if the message is too long, it
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* will be truncated.
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*/
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if (m_maxSizeInfoMsg <= 0) |
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{
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m_category.info(msg + "\n");
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} |
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else {
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if (msg.length() <= m_maxSizeInfoMsg)
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{
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m_category.info(msg + "\n");
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} |
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else
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{
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StringBuffer sb = new StringBuffer(msg.substring(0, m_maxSizeInfoMsg)); |
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sb.append(" [TRUNCATED BY LOGGER SEE property \"");
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sb.append(INFO_MAXSIZE_PROPERTY); |
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sb.append("\"]\n");
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m_category.info(sb.toString()); |
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} |
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} |
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} |
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/**
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* Adds an warning message
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*/
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public void warning(String msg) |
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{
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m_category.warn(msg + "\n");
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} |
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/**
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* Adds an error message
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*/
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public void error(String msg) |
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{
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m_category.fatal(msg + "\n");
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} |
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/**
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* Writes a message to the error log. This message includes the
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* detail message of the given exception as well as the
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* exception's stack trace.
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*
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* @param descr description of the error.
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* @param e exception that was caught.
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*/
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public void error(String descr, Exception e) |
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{
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m_category.fatal(descr + ": detail message = \"" + e.getMessage()
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+ "\", trace =\n" + Logger.stackTraceToString(e)); |
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} |
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/**
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* Converts the stack trace of the given exception to a string.
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*/
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public static String stackTraceToString(Exception e) |
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{
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try
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{
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CharArrayWriter writer = new CharArrayWriter(); |
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e.printStackTrace(new PrintWriter(writer)); |
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return writer.toString();
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} |
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catch(Exception e2) |
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{
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return " [failed to convert stacktrace to string] "; |
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} |
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} |
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/**
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* Reads the named property from the logger properties file and returns
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* it. If the property is missing or if its value is invalid, the value
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* of <code>defValue</code> is returned.
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*/
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private int readMaxSizeProperty(String propName, int defValue) |
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{
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try
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{
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Properties props = PropertyManager.getProperties(
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PropertyManager.LOGGER_PROPERTIES); |
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if (props == null) |
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{
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System.err.println("[Logger] Failed to read property \"" |
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+ propName + "\": cannot get properties of "
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+ PropertyManager.LOGGER_PROPERTIES); |
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return defValue;
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} |
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int n = defValue;
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String s = props.getProperty(propName);
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if (s != null && s.length() != 0) |
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{
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try
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{
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int k = Integer.parseInt(s); |
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if (k > 0) |
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{
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n = k; |
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} |
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} |
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catch(NumberFormatException e) |
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{
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System.err.println("[Logger] invalid value for property \"" |
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+ propName + "\": not an integer: " + s
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+ "---ignoring property");
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return defValue;
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} |
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} |
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return n;
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} |
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catch(IOException e) |
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{
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System.err.println("[Logger] Failed to read property \"" + propName |
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+ "\": I/O error: " + e.getMessage() + "---ignoring property"); |
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return defValue;
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} |
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} |
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} |