/[projects]/miscJava/CircuitBreaker/src/main/java/dk/thoerup/circuitbreaker/web/ViewCircuitBreaker.java
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Annotation of /miscJava/CircuitBreaker/src/main/java/dk/thoerup/circuitbreaker/web/ViewCircuitBreaker.java

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Revision 1285 - (hide annotations) (download)
Mon Apr 11 07:52:15 2011 UTC (13 years, 1 month ago) by torben
Original Path: CircuitBreaker/src/dk/thoerup/circuitbreaker/web/ViewCircuitBreaker.java
File size: 5606 byte(s) 
add LoggingCircuitBreaker
1 torben 467 package dk.thoerup.circuitbreaker.web;
2 torben 416
3 torben 417 import java.util.Date;
4 torben 1285 import java.util.LinkedList;
5 torben 417
6 torben 416 import javax.servlet.http.HttpServletRequest;
7     import javax.servlet.http.HttpServletResponse;
8    
9 torben 467 import dk.thoerup.circuitbreaker.AccountingCircuitBreaker;
10 torben 1285 import dk.thoerup.circuitbreaker.LoggingCircuitBreaker;
11 torben 467 import dk.thoerup.circuitbreaker.CircuitBreaker;
12     import dk.thoerup.circuitbreaker.CircuitBreakerManager;
13 torben 416
14     public class ViewCircuitBreaker implements Command {
15 torben 417
16     private boolean readOnly;
17    
18     public ViewCircuitBreaker(boolean readOnly) {
19     this.readOnly = readOnly;
20     }
21 torben 416
22 torben 417 private String actionBuilder(String uri, String action, String breaker) {
23     StringBuilder sb = new StringBuilder();
24     sb.append("<form action=\"").append(uri).append("\" method=\"post\">");
25     sb.append("<input type=\"hidden\" name=\"command\" value=\"action\">\n");
26     sb.append("<input type=\"hidden\" name=\"breaker\" value=\"").append(breaker).append("\">\n");
27     sb.append("<input type=\"hidden\" name=\"action\" value=\"").append(action).append("\">\n");
28     sb.append("<input type=\"submit\" value=\"").append(action).append("\">\n");
29     sb.append("</form>");
30    
31     return sb.toString();
32     }
33    
34 torben 448 public String getStateBar(CircuitBreaker breaker) {
35 torben 417 StringBuilder sb = new StringBuilder();
36 torben 448 sb.append( breaker.getStateName() );
37 torben 417 sb.append(": <span style=\"background-color: ");
38 torben 448 if ( breaker.isOpen() ) {
39 torben 417 sb.append("red");
40 torben 448 } else if ( breaker.isClosed() ) {
41 torben 417 sb.append("green");
42     } else {
43     sb.append("yellow");
44     }
45     sb.append("\">&nbsp;&nbsp;&nbsp;<span>");
46    
47     return sb.toString();
48     }
49    
50 torben 628 public String formatDate(long date) {
51     if (date == 0L) {
52     return "-";
53     } else {
54     return new Date(date).toString();
55     }
56     }
57    
58 torben 416 public String execute(HttpServletRequest req, HttpServletResponse resp) {
59     CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker( req.getParameter("breaker"));
60 torben 417 String uri = req.getRequestURI();
61 torben 416
62     if (breaker == null)
63     return "<html><body><h2>No breaker named '" + req.getParameter("breaker") + "'</h2></body></html>";
64    
65     StringBuilder sb = new StringBuilder();
66    
67     sb.append("<html><head><title>View Circuitbreaker</title></head><body>");
68     sb.append("<<== <a href=\"").append(req.getRequestURI()).append("\">Back to overview</a><br><br>");
69     sb.append("<h2>CircuitBreaker</h2>\n");
70    
71    
72     sb.append("<b>Attributes:</b>\n");
73     sb.append("<table border=\"1\" cellspacing=0>");
74     sb.append("<tr><td>Name </td><td>").append(breaker.getName()).append("</td></tr>\n");
75 torben 461 sb.append("<tr><td>State </td><td><b>").append( getStateBar(breaker) ).append("</b></td></tr>\n");
76 torben 416 sb.append("<tr><td>Type </td><td>").append(breaker.getClass().getSimpleName() ).append("</td></tr>\n");
77     sb.append("<tr><td>Notifier </td><td>").append(breaker.getNotifierName()).append("</td></tr>\n");
78     sb.append("<tr><td>Failure count </td><td>").append(breaker.getFailureCount()).append("</td></tr>\n");
79     sb.append("<tr><td>Failure threshold </td><td>").append(breaker.getThreshold()).append("</td></tr>\n");
80     sb.append("<tr><td>Timeout, elapsed</td><td>").append( breaker.getElapsed() ).append("</td></tr>\n");
81     sb.append("<tr><td>Timeout, limit</td><td>").append( breaker.getTimeout() ).append("</td></tr>\n");
82 torben 417
83 torben 416 if (breaker instanceof AccountingCircuitBreaker) {
84     AccountingCircuitBreaker acb = (AccountingCircuitBreaker) breaker;
85 torben 417 sb.append("<tr><th colspan=\"2\">Accounting</th></tr>\n");
86     sb.append("<tr><td>Trip count</td><td>").append( acb.getTripCount() ).append("</td></tr>\n");
87 torben 864 sb.append("<tr><td>Re-trip count</td><td>").append( acb.getRetripCount() ).append("</td></tr>\n");
88 torben 417 sb.append("<tr><td>Block count</td><td>").append( acb.getBlockCount() ).append("</td></tr>\n");
89     sb.append("<tr><td>Total failure count</td><td>").append( acb.getTotalFailureCount() ).append("</td></tr>\n");
90     sb.append("<tr><td>Total Call count</td><td>").append( acb.getTotalCallCount() ).append("</td></tr>\n");
91 torben 628 sb.append("<tr><td>Last failure</td><td>").append( formatDate(acb.getLastFailure()) ).append("</td></tr>\n");
92     sb.append("<tr><td>Last trip</td><td>").append( formatDate(acb.getLastTrip()) ).append("</td></tr>\n");
93 torben 864 sb.append("<tr><td>Last re-trip</td><td>").append( formatDate(acb.getLastRetrip()) ).append("</td></tr>\n");
94 torben 628 sb.append("<tr><td>Last reset</td><td>").append( formatDate(acb.getLastReset()) ).append("</td></tr>\n");
95 torben 624
96 torben 628 sb.append("<tr><td>Last resetCounters</td><td>").append( formatDate(acb.getLastResetCounters()) ).append("</td></tr>\n");
97 torben 416 }
98 torben 1285
99     if (breaker instanceof LoggingCircuitBreaker) {
100     LoggingCircuitBreaker lcb = (LoggingCircuitBreaker) breaker;
101    
102     LinkedList<LoggingCircuitBreaker.LogEntry> list = lcb.getLog();
103    
104     sb.append("<tr><th colspan=\"2\">Logging</th></tr>\n");
105     for(LoggingCircuitBreaker.LogEntry entry : list) {
106     sb.append("<tr><td>");
107     sb.append( formatDate(entry.time) ).append(" : ").append(entry.event);
108     sb.append("</td></tr>");
109     }
110     }
111 torben 416
112 torben 698 sb.append("</table>\n");
113     sb.append("Current time: ").append( new Date().toString() ).append("<br><br>\n");
114 torben 416
115 torben 417 sb.append("<b>Operations:</b>\n");
116     if ( !readOnly ) {
117     sb.append( actionBuilder(uri, "reset", breaker.getName())).append("<br>\n");
118     sb.append( actionBuilder(uri, "tripBreaker", breaker.getName())).append("<br>\n");
119     if (breaker instanceof AccountingCircuitBreaker ) {
120     sb.append( actionBuilder(uri, "resetCounters", breaker.getName())).append("<br>\n");
121     }
122     } else {
123     sb.append("<i>the CircuitBreakers can only be viewed</i>");
124     }
125 torben 416
126     sb.append("</body></html>");
127    
128     return sb.toString();
129     }
130    
131     }
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