OtpStatusHandler.java

// Copyright (c) 2011, Lars-Ake Fredlund
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//     // Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     // Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//     // Neither the name of the copyright holders nor the
//       names of its contributors may be used to endorse or promote products
//       derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ''AS IS''
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// @author Lars-Ake Fredlund (lfredlund@fi.upm.es)
// @copyright 2011 Lars-Ake Fredlund
//

package javaErlang;

import java.util.logging.Logger;
import java.util.logging.Level;

import com.ericsson.otp.erlang.OtpErlangObject;
import com.ericsson.otp.erlang.OtpNodeStatus;

class OtpStatusHandler extends OtpNodeStatus {
    String connectedNode = null;
    private final OtpErlangObject nodeIdentifier;

    public OtpStatusHandler(final OtpErlangObject nodeIdentifier) {
        this.nodeIdentifier = nodeIdentifier;
    }

    @Override
    public void remoteStatus(final String node, final boolean up,
                             final Object info) {
        if (JavaErlang.logger.isLoggable(Level.FINER)) {
            JavaErlang.logger.log
                (Level.FINER,
                 "Event at node " + node + " with " + up
                 + "; info=" + info);
        }

        if (connectedNode == null && up) {
            connectedNode = node;
        } else if (connectedNode != null && !up && node.equals(connectedNode)) {
            if (JavaErlang.logger.isLoggable(Level.INFO)) {
                JavaErlang.logger.log
                    (Level.INFO,
                     "Erlang peer node " + nodeIdentifier
                     + " died; terminating...");
            }
            System.exit(0);
        }
    }
}