package dk.thoerup.circuitbreaker.web; import java.util.Date; import java.util.LinkedList; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import dk.thoerup.circuitbreaker.AccountingCircuitBreaker; import dk.thoerup.circuitbreaker.LoggingCircuitBreaker; import dk.thoerup.circuitbreaker.CircuitBreaker; import dk.thoerup.circuitbreaker.CircuitBreakerManager; public class ViewCircuitBreaker implements Command { private boolean readOnly; public ViewCircuitBreaker(boolean readOnly) { this.readOnly = readOnly; } private String actionBuilder(String uri, String action, String breaker) { StringBuilder sb = new StringBuilder(); sb.append("
"); sb.append("\n"); sb.append("\n"); sb.append("\n"); sb.append("\n"); sb.append("
"); return sb.toString(); } public String getStateBar(CircuitBreaker breaker) { StringBuilder sb = new StringBuilder(); sb.append( breaker.getStateName() ); sb.append(":    "); return sb.toString(); } public String formatDate(long date) { if (date == 0L) { return "-"; } else { return new Date(date).toString(); } } public String execute(HttpServletRequest req, HttpServletResponse resp) { CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker( req.getParameter("breaker")); String uri = req.getRequestURI(); if (breaker == null) return "

No breaker named '" + req.getParameter("breaker") + "'

"; StringBuilder sb = new StringBuilder(); sb.append("View Circuitbreaker"); sb.append("<<== Back to overview

"); sb.append("

CircuitBreaker

\n"); sb.append("Attributes:\n"); sb.append(""); sb.append("\n"); sb.append("\n"); sb.append("\n"); sb.append("\n"); sb.append("\n"); sb.append("\n"); sb.append("\n"); sb.append("\n"); if (breaker instanceof AccountingCircuitBreaker) { AccountingCircuitBreaker acb = (AccountingCircuitBreaker) breaker; sb.append("\n"); sb.append("\n"); sb.append("\n"); sb.append("\n"); sb.append("\n"); sb.append("\n"); sb.append("\n"); sb.append("\n"); sb.append("\n"); sb.append("\n"); sb.append("\n"); } if (breaker instanceof LoggingCircuitBreaker) { LoggingCircuitBreaker lcb = (LoggingCircuitBreaker) breaker; LinkedList list = lcb.getLog(); sb.append("\n"); for(LoggingCircuitBreaker.LogEntry entry : list) { sb.append(""); } } sb.append("
Name ").append(breaker.getName()).append("
State ").append( getStateBar(breaker) ).append("
Type ").append(breaker.getClass().getSimpleName() ).append("
Notifier ").append(breaker.getNotifierName()).append("
Failure count ").append(breaker.getFailureCount()).append("
Failure threshold ").append(breaker.getThreshold()).append("
Timeout, elapsed").append( breaker.getElapsed() ).append("
Timeout, limit").append( breaker.getTimeout() ).append("
Accounting
Trip count").append( acb.getTripCount() ).append("
Re-trip count").append( acb.getRetripCount() ).append("
Block count").append( acb.getBlockCount() ).append("
Total failure count").append( acb.getTotalFailureCount() ).append("
Total Call count").append( acb.getTotalCallCount() ).append("
Last failure").append( formatDate(acb.getLastFailure()) ).append("
Last trip").append( formatDate(acb.getLastTrip()) ).append("
Last re-trip").append( formatDate(acb.getLastRetrip()) ).append("
Last reset").append( formatDate(acb.getLastReset()) ).append("
Last resetCounters").append( formatDate(acb.getLastResetCounters()) ).append("
Logging
"); sb.append( formatDate(entry.time) ).append(" : ").append(entry.event); sb.append("
\n"); sb.append("Current time: ").append( new Date().toString() ).append("

\n"); sb.append("Operations:\n"); if ( !readOnly ) { sb.append( actionBuilder(uri, "reset", breaker.getName())).append("
\n"); sb.append( actionBuilder(uri, "tripBreaker", breaker.getName())).append("
\n"); if (breaker instanceof AccountingCircuitBreaker ) { sb.append( actionBuilder(uri, "resetCounters", breaker.getName())).append("
\n"); } } else { sb.append("the CircuitBreakers can only be viewed"); } sb.append(""); return sb.toString(); } }