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 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package org.openjdk.btrace.services.impl;

import org.openjdk.btrace.core.comm.MessageCommand;
import org.openjdk.btrace.services.api.RuntimeContext;
import org.openjdk.btrace.services.spi.BTraceService;
import org.openjdk.btrace.services.spi.RuntimeService;

/**
 * A very rudimentary printer service.
 *
 * <p>Currently, this is a showcase for how to implement a {@linkplain BTraceService}. It might be
 * extended to a grown-up printer service later on.
 *
 * @author Jaroslav Bachorik
 */
public final class Printer extends RuntimeService {
  private static final String LINE_SEPARATOR = System.getProperty("line.separator");

  public Printer(RuntimeContext rt) {
    super(rt);
  }

  public void print(String str) {
    send(str);
  }

  public void println(String str) {
    print(str + LINE_SEPARATOR);
  }

  public void println() {
    send(LINE_SEPARATOR);
  }

  private void send(String msg) {
    rt.send(new MessageCommand(0L, msg));
  }
}
