1
14
15 package com.liferay.portal.kernel.log;
16
17 import com.liferay.portal.kernel.io.unsync.UnsyncPrintWriter;
18 import com.liferay.portal.kernel.io.unsync.UnsyncStringWriter;
19 import com.liferay.portal.kernel.util.StackTraceUtil;
20
21 import java.util.ArrayList;
22 import java.util.List;
23 import java.util.Properties;
24
25 import javax.servlet.ServletException;
26 import javax.servlet.jsp.JspException;
27
28
33 public class LogUtil {
34
35 public static final int STACK_TRACE_LENGTH = 20;
36
37 public static final boolean REMOVE_UNKNOWN_SOURCE = true;
38
39 public static void debug(Log log, Properties props) {
40 if (log.isDebugEnabled()) {
41 UnsyncStringWriter unsyncStringWriter = new UnsyncStringWriter(
42 props.size() + 1);
43
44 props.list(new UnsyncPrintWriter(unsyncStringWriter));
45
46 log.debug(unsyncStringWriter.toString());
47 }
48 }
49
50 public static void log(Log log, Throwable t) {
51 if (t instanceof JspException) {
52 log(log, (JspException)t);
53 }
54 else if (t instanceof ServletException) {
55 log(log, (ServletException)t);
56 }
57 else {
58 Throwable cause = t.getCause();
59
60 if (cause != null) {
61 log(log, cause);
62 }
63 else {
64 _log(log, t);
65 }
66 }
67 }
68
69 public static void log(Log log, JspException jspe) {
70 Throwable cause = jspe.getCause();
71
72 if (cause == null) {
73 cause = jspe;
74 }
75
76 if ((cause != jspe) && (cause instanceof JspException)) {
77 log(log, (JspException)cause);
78 }
79 else if (cause instanceof ServletException) {
80 log(log, (ServletException)cause);
81 }
82 else {
83 _log(log, cause);
84 }
85 }
86
87 public static void log(Log log, ServletException se) {
88 Throwable cause = se.getRootCause();
89
90 if (cause == null) {
91 cause = se;
92 }
93
94 if (cause instanceof JspException) {
95 log(log, (JspException)cause);
96 }
97 else if ((cause != se) && (cause instanceof ServletException)) {
98 log(log, (ServletException)cause);
99 }
100 else {
101 _log(log, cause);
102 }
103 }
104
105 private static void _log(Log log, Throwable cause) {
106 StackTraceElement[] steArray = cause.getStackTrace();
107
108
111 if (steArray.length > STACK_TRACE_LENGTH) {
112 int count = 0;
113
114 List<StackTraceElement> steList =
115 new ArrayList<StackTraceElement>();
116
117 for (int i = 0; i < steArray.length; i++) {
118 StackTraceElement ste = steArray[i];
119
120
124 String className = ste.getClassName();
125
126 boolean addElement = true;
127
128 if (REMOVE_UNKNOWN_SOURCE && (ste.getLineNumber() < 0)) {
129 addElement = false;
130 }
131
132 if (className.startsWith("$") ||
133 className.startsWith("java.lang.reflect.") ||
134 className.startsWith("org.springframework.") ||
135 className.startsWith("sun.reflect.")) {
136
137 addElement = false;
138 }
139
140 if (addElement) {
141 steList.add(ste);
142
143 count++;
144 }
145
146 if (count >= STACK_TRACE_LENGTH) {
147 break;
148 }
149 }
150
151 steArray = steList.toArray(new StackTraceElement[steList.size()]);
152
153 cause.setStackTrace(steArray);
154 }
155
156 log.error(StackTraceUtil.getStackTrace(cause));
157 }
158
159 }