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/*
* Copyright (c) 2018 Bell Canada, Pantheon Technologies 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.srv6.util;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.base.Optional;
import io.fd.honeycomb.translate.MappingContext;
import javax.annotation.Nonnull;
import javax.annotation.concurrent.ThreadSafe;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.naming.context.rev160513.Contexts;
import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.locator.context.rev180605.Srv6LocatorContextAugmentation;
import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.locator.context.rev180605.srv6.locator.context.attributes.Srv6LocatorMappings;
import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.locator.context.rev180605.srv6.locator.context.attributes.srv6.locator.mappings.Srv6LocatorMapping;
import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.locator.context.rev180605.srv6.locator.context.attributes.srv6.locator.mappings.Srv6LocatorMappingBuilder;
import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.locator.context.rev180605.srv6.locator.context.attributes.srv6.locator.mappings.Srv6LocatorMappingKey;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6Prefix;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
/**
* Facade on top of {@link MappingContext} that manages {@link Srv6LocatorMappings}.
*/
@ThreadSafe
public final class LocatorContextManagerImpl implements LocatorContextManager {
private static final String SLASH = "/";
private final InstanceIdentifier<Srv6LocatorMappings> ctxIid;
private final Integer defaultLocatorLength;
public LocatorContextManagerImpl(@Nonnull final Integer defaultLocatorLength) {
checkArgument(defaultLocatorLength > 0 && defaultLocatorLength < 128,
"defaultLocatorLength is out of range(1-127).");
this.defaultLocatorLength = checkNotNull(defaultLocatorLength, "defaultLocatorLength should not be null");
this.ctxIid = InstanceIdentifier.create(Contexts.class)
.augmentation(Srv6LocatorContextAugmentation.class)
.child(Srv6LocatorMappings.class);
}
@Override
public void addLocator(@Nonnull final String name, @Nonnull Ipv6Prefix ipv6Prefix,
@Nonnull final MappingContext ctx) {
final KeyedInstanceIdentifier<Srv6LocatorMapping, Srv6LocatorMappingKey> mappingIid = getLocatorIid(name);
final Srv6LocatorMappingBuilder builder = new Srv6LocatorMappingBuilder()
.withKey(new Srv6LocatorMappingKey(name)).setPrefix(ipv6Prefix).setName(name);
ctx.put(mappingIid, builder.build());
}
@Override
public boolean containsLocator(@Nonnull final String name, @Nonnull final MappingContext ctx) {
final Optional<Srv6LocatorMapping> read = ctx.read(getLocatorIid(name));
return read.isPresent();
}
@Override
public Ipv6Prefix getLocator(@Nonnull final String name, @Nonnull final MappingContext ctx) {
final Optional<Srv6LocatorMapping> read = ctx.read(getLocatorIid(name));
if (read.isPresent()) {
return read.get().getPrefix();
}
// construct artificial mapping with default locator length
Ipv6Prefix ipv6Prefix = new Ipv6Prefix(getArtificialName(name));
addLocator(getArtificialName(name), ipv6Prefix, ctx);
return ipv6Prefix;
}
@Override
public void removeLocator(@Nonnull final String name, @Nonnull final MappingContext ctx) {
ctx.delete(getLocatorIid(name));
}
private KeyedInstanceIdentifier<Srv6LocatorMapping, Srv6LocatorMappingKey> getLocatorIid(
@Nonnull final String locator) {
return ctxIid.child(Srv6LocatorMapping.class, new Srv6LocatorMappingKey(locator));
}
private synchronized String getArtificialName(String name) {
return name + SLASH + defaultLocatorLength;
}
}
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