git.gag.com Git - debian/openrocket/blob - src/net/sf/openrocket/logging/LogLevelBufferLogger.java

   1 package net.sf.openrocket.logging;
   2
   3 import java.util.ArrayList;
   4 import java.util.Collections;
   5 import java.util.EnumMap;
   6 import java.util.List;
   7
   8 /**
   9  * A logger that buffers a specific number of log lines from every log
  10  * level.  This prevents a multitude of lower-level lines from purging
  11  * away important higher-level messages.  The method {@link #getLogs()}
  12  * combines these logs into their original (natural) order.  A log line
  13  * is also inserted stating the number of log lines of the particular
  14  * level that have been purged from the buffer.
  15  *
  16  * @author Sampo Niskanen <sampo.niskanen@iki.fi>
  17  */
  18 public class LogLevelBufferLogger extends LogHelper {
  19
  20         private final EnumMap<LogLevel, BufferLogger> loggers =
  21                 new EnumMap<LogLevel, BufferLogger>(LogLevel.class);
  22
  23
  24         public LogLevelBufferLogger(int count) {
  25                 for (LogLevel level: LogLevel.values()) {
  26                         loggers.put(level, new BufferLogger(count));
  27                 }
  28         }
  29
  30         @Override
  31         public void log(LogLine line) {
  32                 // Delegate to the buffered logger of this level
  33                 loggers.get(line.getLevel()).log(line);
  34         }
  35
  36
  37         public List<LogLine> getLogs() {
  38                 List<LogLine> result = new ArrayList<LogLine>();
  39
  40                 for (LogLevel level: LogLevel.values()) {
  41                         BufferLogger logger = loggers.get(level);
  42                         List<LogLine> logs = logger.getLogs();
  43                         int misses = logger.getOverwriteCount();
  44
  45                         if (misses > 0) {
  46                                 if (logs.isEmpty()) {
  47                                         result.add(new LogLine(level, 0, new TraceException(),
  48                                                         "--- "+misses+" " + level + " lines removed but log is empty! ---",
  49                                                         null));
  50                                 } else {
  51                                         result.add(new LogLine(level, logs.get(0).getLogCount(), new TraceException(),
  52                                                         "--- "+misses+" " + level + " lines removed ---", null));
  53                                 }
  54                         }
  55                         result.addAll(logs);
  56                 }
  57
  58                 Collections.sort(result);
  59                 return result;
  60         }
  61
  62
  63 }