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1
17
18 package org.columba.core.scripting;
19
20 import java.io.PrintWriter  ;
21 import java.io.StringWriter ;
22 import java.util.Collections ;
23 import java.util.LinkedList ;
24 import java.util.List ;
25 import java.util.Observable ;
26
27
30 public class ScriptLogger
31 extends Observable
32 {
33
34 public static class LogEntry
35 {
36 private String
37 message,
38 details;
39
40 public LogEntry()
41 {
42 this("", "");
43 }
44
45 public LogEntry(String message)
46 {
47 this(message, "");
48 }
49
50 public LogEntry(String message, String details)
51 {
52 this.message = message;
53 this.details = details;
54 }
55
56 public String getMessage()
57 {
58 return message;
59 }
60
61 public void setMessage(String message)
62 {
63 this.message = message;
64 }
65
66 public String getDetails()
67 {
68 return details;
69 }
70
71 public void setDetails(String details)
72 {
73 this.details = details;
74 }
75 }
76
77 private LinkedList <LogEntry> logger;
78 private static ScriptLogger self = null;
79 private static final int MAX_LOG_ENTRIES = 200;
80
81 private ScriptLogger()
82 {
83 logger = new LinkedList <LogEntry>();
84 }
85
86
87 public static ScriptLogger getInstance()
88 {
89 if (self == null) self = new ScriptLogger();
90
91 return self;
92 }
93
94 public void append(String message, Exception details)
95 {
96 StringWriter writer = new StringWriter ();
97 details.printStackTrace(new PrintWriter (writer));
98 append(message, writer.toString());
99 }
100
101 public void append(String message, String details)
102 {
103 append(new LogEntry(message, details));
104 }
105
106 public void append(String message)
107 {
108 append(message, "");
109 }
110
111 public void append(LogEntry entry)
112 {
113 logger.addFirst(entry);
114 if (logger.size() > MAX_LOG_ENTRIES) logger.remove(0);
115
116 setChanged();
117 notifyObservers(entry);
118 }
119
120 public void clear()
121 {
122 logger.clear();
123 }
124
125 public List <LogEntry> dumpCurrentLog()
126 {
127 return Collections.unmodifiableList(logger);
128 }
129
130 }
131 |
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