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/*
* Copyright (c) 2016 Cisco and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.fd.honeycomb.translate.v3po.util;
import io.fd.honeycomb.translate.util.read.KeepaliveReaderWrapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Listens to vpp status changes. Restarts honeycomb if vpp is down.
*/
public final class VppStatusListener implements KeepaliveReaderWrapper.KeepaliveFailureListener {
/**
* Value picked up by honeycomb start script, tigers honeycomb restart when returned by the java process
*/
public static final int RESTART_ERROR_CODE = 100;
private static final Logger LOG = LoggerFactory.getLogger(VppStatusListener.class);
private volatile boolean down;
public boolean isDown() {
return down;
}
@Override
public void onKeepaliveFailure() {
LOG.error("Keepalive failed. VPP is probably DOWN! Restarting Honeycomb");
this.down = true;
System.exit(RESTART_ERROR_CODE);
}
}
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