001: /* ====================================================================
002: * The Jcorporate Apache Style Software License, Version 1.2 05-07-2002
003: *
004: * Copyright (c) 1995-2002 Jcorporate Ltd. All rights reserved.
005: *
006: * Redistribution and use in source and binary forms, with or without
007: * modification, are permitted provided that the following conditions
008: * are met:
009: *
010: * 1. Redistributions of source code must retain the above copyright
011: * notice, this list of conditions and the following disclaimer.
012: *
013: * 2. Redistributions in binary form must reproduce the above copyright
014: * notice, this list of conditions and the following disclaimer in
015: * the documentation and/or other materials provided with the
016: * distribution.
017: *
018: * 3. The end-user documentation included with the redistribution,
019: * if any, must include the following acknowledgment:
020: * "This product includes software developed by Jcorporate Ltd.
021: * (http://www.jcorporate.com/)."
022: * Alternately, this acknowledgment may appear in the software itself,
023: * if and wherever such third-party acknowledgments normally appear.
024: *
025: * 4. "Jcorporate" and product names such as "Expresso" must
026: * not be used to endorse or promote products derived from this
027: * software without prior written permission. For written permission,
028: * please contact info@jcorporate.com.
029: *
030: * 5. Products derived from this software may not be called "Expresso",
031: * or other Jcorporate product names; nor may "Expresso" or other
032: * Jcorporate product names appear in their name, without prior
033: * written permission of Jcorporate Ltd.
034: *
035: * 6. No product derived from this software may compete in the same
036: * market space, i.e. framework, without prior written permission
037: * of Jcorporate Ltd. For written permission, please contact
038: * partners@jcorporate.com.
039: *
040: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
041: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
042: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
043: * DISCLAIMED. IN NO EVENT SHALL JCORPORATE LTD OR ITS CONTRIBUTORS
044: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
045: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
046: * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
047: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
048: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
049: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
050: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
051: * SUCH DAMAGE.
052: * ====================================================================
053: *
054: * This software consists of voluntary contributions made by many
055: * individuals on behalf of the Jcorporate Ltd. Contributions back
056: * to the project(s) are encouraged when you make modifications.
057: * Please send them to support@jcorporate.com. For more information
058: * on Jcorporate Ltd. and its products, please see
059: * <http://www.jcorporate.com/>.
060: *
061: * Portions of this software are based upon other open source
062: * products and are subject to their respective licenses.
063: */
064:
065: package com.jcorporate.expresso.core.servlet;
066:
067: import com.jcorporate.expresso.kernel.InstallLog;
068: import org.apache.log4j.Logger;
069:
070: import java.io.ByteArrayOutputStream;
071: import java.io.IOException;
072: import java.io.PrintStream;
073: import java.io.PrintWriter;
074:
075: /**
076: * This is an implementation of the <code>IntallLog</code> interface that is
077: * useful when running installation systems inside servlets.
078: * <p>It renders the output to the servlet output stream.</p>
079: *
080: * @author Michael Rimov
081: * @see com.jcorporate.expresso.kernel.InstallLog
082: * @see com.jcorporate.expresso.kernel.ConsoleInstallLog
083: */
084: public class ServletInstallLog implements InstallLog {
085:
086: private static final transient Logger log = Logger
087: .getLogger(ServletInstallLog.class);
088:
089: private PrintWriter out;
090:
091: /**
092: * Constructs a ControllerInstallLog and sets the ControllerResponse that
093: * we will be using to add the outputs to.
094: *
095: * @param response
096: */
097: public ServletInstallLog(PrintWriter theOutputStream)
098: throws IOException {
099: out = theOutputStream;
100: }
101:
102: /**
103: * The point is that we don't want the default constructor used.
104: */
105: protected ServletInstallLog() {
106:
107: }
108:
109: /**
110: * Log a debug message
111: *
112: * @param message The message to log.
113: */
114: public void debug(String message) {
115: out.println("<p><font color=\"green\"> [DEBUG] " + message
116: + "</font></p>");
117: }
118:
119: /**
120: * Log an info message
121: *
122: * @param message The message to log.
123: */
124: public void info(String message) {
125: out.println("<p align=\"center\">" + message + "</p>");
126: }
127:
128: /**
129: * Log a warning message
130: *
131: * @param message The message to log.
132: */
133: public void warn(String message) {
134: out
135: .println("<p align=\"center\"><font color=\"orange\"> [WARN] "
136: + message + "</font></p>");
137: }
138:
139: /**
140: * Log a warning exception
141: *
142: * @param message The message to log.
143: * @param error The <code>Throwable</code> object to log
144: */
145: public void warn(String message, Throwable error) {
146: out
147: .println("<p align=\"center\"><font color=\"orange\"> [WARN] "
148: + message + "</font></p>");
149: writeException(error);
150: }
151:
152: /**
153: * Log an error exception
154: *
155: * @param message The message to log.
156: * @param error The <code>Throwable</code> object to log
157: */
158: public void error(String message, Throwable error) {
159: out.println("<p align=\"center\"><font color=\"red\"> [WARN] "
160: + message + "</font></p>");
161: writeException(error);
162: }
163:
164: /**
165: * Log an error message
166: *
167: * @param message The message to log.
168: */
169: public void error(String message) {
170: out.println("<p align=\"center\"><font color=\"red\"> [WARN] "
171: + message + "</font></p>");
172: }
173:
174: /**
175: * Adds the exceptions as nested outputs to the original log message
176: *
177: * @param o the original log message
178: * @param error the exception to log as well.
179: */
180: protected void writeException(Throwable error) {
181: out.println("<p align=\"center\">" + error.getMessage()
182: + "</p>");
183: out.println("<blockquote>");
184: ByteArrayOutputStream bos = new ByteArrayOutputStream();
185: error.printStackTrace(new PrintStream(bos));
186: out.println(bos.toString());
187: out.println("</blockquote>");
188: }
189:
190: }
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