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54
55 package org.apache.jetspeed.portlet;
56
57 /**
58  ** The <CODE>PortletLog</CODE> provides the portlet with the ability
59  ** to log information, warning, or error texts. The log is
60  ** maintained by the portlet container. The type and location of
61  ** of the log is a matter of implementation. Also, whether logging
62  ** is enabled or not is at the discretion of the portlet container.
63  **
64  ** <PRE>
65  ** ...
66  **
67  ** PortletLog log = iContext.getLog ();
68  **
69  ** if (log.isWarnEnabled())
70  ** log.warn ("Can access the content source");
71  **
72  ** ...
73  ** </PRE>
74  **
75  ** @author <A HREF="mailto:tboehme@us.ibm.com">Thomas F. Boehme</A>
76  **/

77
78 public interface PortletLog
79 {
80
81     /**
82      ** Returns whether the debug level of the portlet log is enabled.
83      **
84      ** @return <CODE>true</CODE> if the log is enabled, <BR>
85      ** <CODE>false</CODE>
86      **/

87
88     public boolean isDebugEnabled ();
89
90     /**
91      ** Logs the given informational text in the portlet log.
92      **
93      ** @param aText
94      ** the informational text to log
95      **/

96
97     public void debug (String JavaDoc text);
98
99     /**
100      ** Returns whether the info level of the portlet log is enabled.
101      **
102      ** @return <CODE>true</CODE> if the log is enabled, <BR>
103      ** <CODE>false</CODE>
104      **/

105
106     public boolean isInfoEnabled ();
107
108     /**
109      ** Logs the given informational text in the portlet log.
110      **
111      ** @param aText
112      ** the informational text to log
113      **/

114
115     public void info (String JavaDoc text);
116
117     /**
118      ** Returns whether the warn level of the portlet log is enabled.
119      **
120      ** @return <CODE>true</CODE> if the log is enabled, <BR>
121      ** <CODE>false</CODE>
122      **/

123
124     public boolean isWarnEnabled ();
125
126     /**
127      ** Logs the given warning text in the portlet log.
128      **
129      ** @param text
130      ** the warning text to log
131      **/

132
133     public void warn (String JavaDoc text);
134
135     /**
136      ** Returns whether the error level of the portlet log is enabled.
137      **
138      ** @return <CODE>true</CODE> if the log is enabled, <BR>
139      ** <CODE>false</CODE>
140      **/

141
142     public boolean isErrorEnabled ();
143
144     /**
145      ** Logs the given error text in the portlet log.
146      **
147      ** @param text
148      ** the error text to log
149      **
150      ** @see #error(String,Throwable)
151      **/

152
153     public void error (String JavaDoc text);
154
155     /**
156      ** Logs the given error text, cause, and a stack trace in
157      ** the portlet log.
158      **
159      ** @param text
160      ** the error text to log
161      ** @param cause
162      ** the cause for logging
163      **
164      ** @see #error(String)
165      **/

166
167     public void error (String JavaDoc text, Throwable JavaDoc cause);
168 }
169
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