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SchemaCrawler is an open-source Java API that makes working with database metadata as easy as working with plain old Java objects. SchemaCrawler is also a database schema discovery and comprehension, and schema documentation tool. You can search for database schema objects using regular expressions, and output the schema and data in a readable text format. The output is designed to be diff-ed against other database schemas.

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/*
========================================================================
SchemaCrawler
http://www.schemacrawler.com
Copyright (c) 2000-2024, Sualeh Fatehi .
All rights reserved.
------------------------------------------------------------------------

SchemaCrawler is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

SchemaCrawler and the accompanying materials are made available under
the terms of the Eclipse Public License v1.0, GNU General Public License
v3 or GNU Lesser General Public License v3.

You may elect to redistribute this code under any of these licenses.

The Eclipse Public License is available at:
http://www.eclipse.org/legal/epl-v10.html

The GNU General Public License v3 and the GNU Lesser General Public
License v3 are available at:
http://www.gnu.org/licenses/

========================================================================
*/

package us.fatehi.utility;

import java.io.PrintStream;
import java.io.PrintWriter;
import java.util.function.Supplier;
import static us.fatehi.utility.Utility.trimToEmpty;

/** Allows a main method to exit without a stack trace, but with an exit code */
public class SystemExitException extends RuntimeException {

  private static final long serialVersionUID = -6142850519050179767L;

  private final int exitCode;
  private final String message;
  private final Supplier messagePrinter;

  public SystemExitException(final int exitCode, final String message) {
    super(message);
    this.exitCode = exitCode;
    this.message = trimToEmpty(message);
    messagePrinter = () -> String.format("Exit code %d: %s", exitCode, message);
  }

  @Override
  public synchronized Throwable fillInStackTrace() {
    return this;
  }

  public int getExitCode() {
    return exitCode;
  }

  @Override
  public String getMessage() {
    return message;
  }

  @Override
  public void printStackTrace(final PrintStream s) {
    if (s == null) {
      return;
    }
    s.println(messagePrinter.get());
    s.flush();
  }

  @Override
  public void printStackTrace(final PrintWriter s) {
    if (s == null) {
      return;
    }
    s.println(messagePrinter.get());
    s.flush();
  }

  @Override
  public String toString() {
    return messagePrinter.get();
  }
}