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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.hc2vpp.fib.management.services.FibTableService;
import io.fd.honeycomb.translate.MappingContext;
import io.fd.honeycomb.translate.read.ReadFailedException;
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.rev180313.Static;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.rev180313.routing.control.plane.protocols.ControlPlaneProtocol;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.rev180313.routing.control.plane.protocols.ControlPlaneProtocolKey;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.vpp.routing.rev180319.RoutingProtocolVppAttr;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Customizer for handling of write operations for {@link ControlPlaneProtocol}
*/
final class ControlPlaneProtocolCustomizer
implements ListWriterCustomizer<ControlPlaneProtocol, ControlPlaneProtocolKey> {
private static final Logger LOG = LoggerFactory.getLogger(ControlPlaneProtocolCustomizer.class);
private final NamingContext routingProtocolContext;
private final FibTableService fibTableService;
ControlPlaneProtocolCustomizer(@Nonnull final NamingContext routingProtocolContext,
FibTableService fibTableService) {
this.routingProtocolContext = routingProtocolContext;
this.fibTableService = fibTableService;
}
@Override
public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<ControlPlaneProtocol> instanceIdentifier,
@Nonnull final ControlPlaneProtocol 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)) {
// Todo HC2VPP-317: A proper solution for Fib table management should be implemented. This is a
// temporary workaround.
// if not present in mapping,create assignment to table id, then create ip v4/v6 fib table on device
try {
fibTableService.checkTableExist(tableId, writeContext.getModificationCache());
} catch (ReadFailedException e) {
LOG.error("VRF Fib table read failed for table {} with iid: {}. Aborting write operation", tableId,
instanceIdentifier);
throw new WriteFailedException(instanceIdentifier, e);
} catch (FibTableService.FibTableDoesNotExistException e) {
LOG.trace("VRF Fib table does not exist. creating new entry for Fib table.", e);
// Write IPv4 and IPv6 Fib table for this VRF
fibTableService.write(instanceIdentifier, tableId, "Vrf-IPv4-" + tableId, false);
fibTableService.write(instanceIdentifier, tableId, "Vrf-IPv6-" + tableId, true);
}
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<ControlPlaneProtocol> instanceIdentifier,
@Nonnull final ControlPlaneProtocol routingProtocol,
@Nonnull final WriteContext writeContext)
throws WriteFailedException {
routingProtocolContext.removeName(routingProtocol.getName(), writeContext.getMappingContext());
}
/**
* Checks whether control plane protocol is static(we support only static ones for now)
*/
private void checkIsStatic(final ControlPlaneProtocol routingProtocol) {
checkArgument(routingProtocol.getType() == Static.class, "Only static routes are allowed");
}
private int extractTableId(final ControlPlaneProtocol 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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