1 files changed, 196 insertions, 0 deletions
diff --git a/src/Error.java b/src/Error.java
new file mode 100644
index 0000000..2f40e4b
--- /dev/null
+++ b/src/Error.java
@@ -0,0 +1,196 @@
+import java.util.concurrent.Semaphore;
+
+import java.io.PrintWriter;
+import java.io.FileWriter;
+
+public enum Error
+{
+   WARNING("[W]"),
+   ERROR("[E]"),
+   FATAL("[F]"),
+   PROGRAM("[P]"); /* Errors that should not if the code's logic was correct. */
+
+   private static final Semaphore MUTEX;
+   private static PrintWriter OUTPUT;
+   private final String emblem;
+   private int count;
+
+   static
+   {
+      MUTEX = new Semaphore(1);
+   }
+
+   private Error (final String emblem)
+   {
+      this.emblem = emblem;
+      this.count = 0;
+   }
+
+   public static int init_handler ()
+   {
+      try
+      {
+         OUTPUT =
+            new PrintWriter
+            (
+               new FileWriter(Parameters.get_log_filename())
+            );
+      }
+      catch (final Exception e)
+      {
+         System.err.println("[F] Could not init the Error Handler:");
+         e.printStackTrace();
+
+         return -1;
+      }
+
+      return 0;
+   }
+
+   public static void finalize_handler ()
+   {
+      OUTPUT.flush();
+      OUTPUT.close();
+
+      summary();
+   }
+
+   public void from_thread
+   (
+      final String thread_id,
+      final String error
+   )
+   {
+      try
+      {
+         MUTEX.acquire();
+
+         OUTPUT.print(emblem);
+         OUTPUT.print("[Thread: ");
+         OUTPUT.print(thread_id);
+         OUTPUT.print("] ");
+         OUTPUT.println(error);
+
+         ++count;
+
+         MUTEX.release();
+      }
+      catch (final InterruptedException ie)
+      {
+         System.err.println
+         (
+            "[W] An thread was interrupted while trying to report an error."
+         );
+      }
+   }
+
+   public void from_thread
+   (
+      final String thread_id,
+      final String error,
+      final String report
+   )
+   {
+      try
+      {
+         MUTEX.acquire();
+
+         OUTPUT.print(emblem);
+         OUTPUT.print("[Thread: ");
+         OUTPUT.print(thread_id);
+         OUTPUT.print("] ");
+         OUTPUT.println(error);
+         OUTPUT.println(report);
+
+         ++count;
+
+         MUTEX.release();
+      }
+      catch (final InterruptedException ie)
+      {
+         System.err.println
+         (
+            "[W] An thread was interrupted while trying to report an error."
+         );
+      }
+   }
+
+   public void from_file
+   (
+      final String filename,
+      final String error
+   )
+   {
+      try
+      {
+         MUTEX.acquire();
+
+         OUTPUT.print(emblem);
+         OUTPUT.print("[File: ");
+         OUTPUT.print(filename);
+         OUTPUT.print("] ");
+         OUTPUT.println(error);
+
+         ++count;
+
+         MUTEX.release();
+      }
+      catch (final InterruptedException ie)
+      {
+         System.err.println
+         (
+            "[W] An thread was interrupted while trying to report an error."
+         );
+      }
+   }
+
+   public void from_file
+   (
+      final String filename,
+      final String error,
+      final String report
+   )
+   {
+      try
+      {
+         MUTEX.acquire();
+
+         OUTPUT.print(emblem);
+         OUTPUT.print("[File: ");
+         OUTPUT.print(filename);
+         OUTPUT.print("] ");
+         OUTPUT.println(error);
+         OUTPUT.println(report);
+
+         ++count;
+
+         MUTEX.release();
+      }
+      catch (final InterruptedException ie)
+      {
+         System.err.println
+         (
+            "[W] An thread was interrupted while trying to report an error."
+         );
+      }
+   }
+
+   private static void summary ()
+   {
+      final StringBuilder sb;
+
+      sb = new StringBuilder();
+
+      sb.append("Log report:\n");
+
+      for (final Error e: Error.values())
+      {
+         sb.append(e.emblem);
+         sb.append(" ");
+         sb.append(e.count);
+         sb.append("\n");
+      }
+
+      System.out.println(sb.toString());
+   }
+}