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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.vpp.distro;
import com.google.inject.Inject;
import io.fd.honeycomb.infra.distro.ProviderTrait;
import io.fd.honeycomb.translate.v3po.util.VppStatusListener;
import java.io.IOException;
import org.openvpp.jvpp.JVppRegistry;
import org.openvpp.jvpp.JVppRegistryImpl;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Provides JVppRegistry. Must be a singleton due to shutdown hook usage. Registers shutdown hook to disconnect from
* VPP.
*/
public final class JVppRegistryProvider extends ProviderTrait<JVppRegistry> {
private static final Logger LOG = LoggerFactory.getLogger(JVppRegistryProvider.class);
@Inject
private VppConfigAttributes config;
@Inject
private VppStatusListener vppStatus;
@Override
protected JVppRegistryImpl create() {
try {
final JVppRegistryImpl registry = new JVppRegistryImpl(config.jvppConnectionName);
// Closing JVpp connection with shutdown hook to erase the connection from VPP so HC will be able
// to connect next time. If JVM is force closed, this will not be executed and VPP connection
// with name from config will stay open and prevent next startup of HC to success
Runtime.getRuntime().addShutdownHook(new Thread() {
@Override
public void run() {
LOG.info("Disconnecting from VPP");
if (vppStatus.isDown()) {
LOG.info("VPP is down. JVppRegistry cleanup is not needed. Exiting");
return;
}
try {
registry.close();
LOG.info("Successfully disconnected from VPP as {}", config.jvppConnectionName);
} catch (Exception e) {
LOG.warn("Unable to properly close jvpp registry", e);
}
}
});
LOG.info("JVpp connection opened successfully as: {}", config.jvppConnectionName);
return registry;
} catch (IOException e) {
throw new IllegalStateException("Unable to open VPP management connection", e);
}
}
}
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