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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());
}
}
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