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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.hc2vpp.routing.write;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkState;
import io.fd.hc2vpp.common.translate.util.NamingContext;
import io.fd.honeycomb.translate.MappingContext;
import io.fd.honeycomb.translate.spi.write.ListWriterCustomizer;
import io.fd.honeycomb.translate.write.WriteContext;
import io.fd.honeycomb.translate.write.WriteFailedException;
import javax.annotation.Nonnull;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.rev140524.Static;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.rev140524.routing.routing.instance.routing.protocols.RoutingProtocol;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.rev140524.routing.routing.instance.routing.protocols.RoutingProtocolKey;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.vpp.routing.rev170917.RoutingProtocolVppAttr;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
/**
* Customizer for handling of write operations for {@link RoutingProtocol}
*/
public class RoutingProtocolCustomizer
implements ListWriterCustomizer<RoutingProtocol, RoutingProtocolKey> {
private final NamingContext routingProtocolContext;
public RoutingProtocolCustomizer(@Nonnull final NamingContext routingProtocolContext) {
this.routingProtocolContext = routingProtocolContext;
}
@Override
public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<RoutingProtocol> instanceIdentifier,
@Nonnull final RoutingProtocol routingProtocol,
@Nonnull final WriteContext writeContext)
throws WriteFailedException {
checkIsStatic(routingProtocol);
final int tableId = extractTableId(routingProtocol);
final MappingContext mappingContext = writeContext.getMappingContext();
final String newProtocolName = routingProtocol.getName();
// enclosed in synchronized block to prevent change of state after containsName/before addName
synchronized (routingProtocolContext) {
if (!routingProtocolContext.containsName(tableId, mappingContext)) {
// if not present in mapping,create assignment to table id. This works only with auto-create flag enabled
// while using ip_add_del_table
routingProtocolContext.addName(tableId, newProtocolName, mappingContext);
} else {
// prevent to fail while restoring data(trying to remap already mapped name)
if (!newProtocolName.equals(routingProtocolContext.getName(tableId, mappingContext))) {
throw new IllegalStateException(String.format(
"An attempt to assign protocol %s to table id %s. Table id already assigned to protocol %s",
newProtocolName, tableId, routingProtocolContext.getName(tableId, mappingContext)));
}
}
}
}
@Override
public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<RoutingProtocol> instanceIdentifier,
@Nonnull final RoutingProtocol routingProtocol,
@Nonnull final WriteContext writeContext)
throws WriteFailedException {
routingProtocolContext.removeName(routingProtocol.getName(), writeContext.getMappingContext());
}
/**
* Checks whether routing protocol is static(we support only static ones for now)
*/
private void checkIsStatic(final RoutingProtocol routingProtocol) {
checkArgument(routingProtocol.getType() == Static.class, "Only static routes are allowed");
}
private int extractTableId(final RoutingProtocol protocol) {
final RoutingProtocolVppAttr vppAttr = protocol.getAugmentation(RoutingProtocolVppAttr.class);
checkState(vppAttr != null && vppAttr.getVppProtocolAttributes() != null,
"Vpp routing protocol attributes not defined");
return vppAttr.getVppProtocolAttributes().getPrimaryVrf().getValue().intValue();
}
}
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