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/*
* Copyright (c) 2017 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.acl.util;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkState;
import static java.util.Objects.requireNonNull;
import com.google.common.base.Optional;
import io.fd.honeycomb.translate.MappingContext;
import io.fd.honeycomb.translate.util.RWUtils;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collector;
import javax.annotation.Nonnull;
import javax.annotation.concurrent.ThreadSafe;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.acl.context.rev170104.VppAclContextAugmentation;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.acl.context.rev170104.vpp.acl.context.attributes.VppAclMappings;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.acl.context.rev170104.vpp.acl.context.attributes.vpp.acl.mappings.VppAclContext;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.acl.context.rev170104.vpp.acl.context.attributes.vpp.acl.mappings.VppAclContextKey;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.acl.context.rev170104.vpp.acl.context.attributes.vpp.acl.mappings.vpp.acl.context.AclMapping;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.acl.context.rev170104.vpp.acl.context.attributes.vpp.acl.mappings.vpp.acl.context.AclMappingBuilder;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.acl.context.rev170104.vpp.acl.context.attributes.vpp.acl.mappings.vpp.acl.context.AclMappingKey;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.acl.context.rev170104.vpp.acl.context.attributes.vpp.acl.mappings.vpp.acl.context.acl.mapping.AceMapping;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.acl.context.rev170104.vpp.acl.context.attributes.vpp.acl.mappings.vpp.acl.context.acl.mapping.AceMappingBuilder;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.acl.context.rev170104.vpp.acl.context.attributes.vpp.acl.mappings.vpp.acl.context.acl.mapping.AceMappingKey;
import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.Contexts;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev181001.acls.acl.aces.Ace;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
/**
* Facade on top of {@link MappingContext} that manages {@link VppAclContext}.
*/
@ThreadSafe
public final class AclContextManagerImpl implements AclContextManager {
private static final Collector<AclMapping, ?, AclMapping> SINGLE_ITEM_ACL_COLLECTOR =
RWUtils.singleItemCollector();
private static final Collector<AceMapping, ?, AceMapping> SINGLE_ITEM_ACE_COLLECTOR =
RWUtils.singleItemCollector();
private final InstanceIdentifier<VppAclContext> ctxIid;
private final String artificialNamePrefix;
public AclContextManagerImpl(@Nonnull final String artificialNamePrefix, @Nonnull final String aclContextName) {
this.artificialNamePrefix = requireNonNull(artificialNamePrefix, "artificialNamePrefix should not be null");
requireNonNull(aclContextName, "aclContextName should not be null");
this.ctxIid = InstanceIdentifier.create(Contexts.class)
.augmentation(VppAclContextAugmentation.class).child(VppAclMappings.class)
.child(VppAclContext.class, new VppAclContextKey(aclContextName));
}
@Override
public synchronized void addAcl(final int id, @Nonnull final String name, @Nonnull final List<Ace> aces,
@Nonnull final MappingContext ctx) {
final KeyedInstanceIdentifier<AclMapping, AclMappingKey> mappingIid = getAclIid(name);
final AclMappingBuilder aclMapping = new AclMappingBuilder().setIndex(id).setName(name);
final List<AceMapping> mappings = new ArrayList<>(aces.size());
int aceIndex = 0;
for (final Ace ace : aces) {
mappings.add(new AceMappingBuilder().setName(ace.getName()).setIndex(aceIndex++).build());
}
aclMapping.setAceMapping(mappings);
ctx.put(mappingIid, aclMapping.build());
}
@Override
public synchronized boolean containsAcl(@Nonnull final String name, @Nonnull final MappingContext ctx) {
final Optional<AclMapping> read = ctx.read(getAclIid(name));
return read.isPresent();
}
@Override
public synchronized int getAclIndex(@Nonnull final String name, @Nonnull final MappingContext ctx) {
final Optional<AclMapping> read = ctx.read(getAclIid(name));
checkArgument(read.isPresent(), "No mapping stored for name: %s", name);
return read.get().getIndex();
}
@Override
public synchronized String getAclName(final int id, @Nonnull final MappingContext ctx) {
if (!containsAclName(id, ctx)) {
final String artificialName = getArtificialAclName(id);
addAcl(id, artificialName, Collections.emptyList(), ctx);
}
final Optional<VppAclContext> read = ctx.read(ctxIid);
checkState(read.isPresent(), "VppAclContext for index: %s is not present. But should be", id);
return read.get().getAclMapping().stream()
.filter(t -> t.getIndex().equals(id))
.collect(SINGLE_ITEM_ACL_COLLECTOR).getName();
}
private boolean containsAclName(final int id, @Nonnull final MappingContext mappingContext) {
final Optional<VppAclContext> read = mappingContext.read(ctxIid);
return read.isPresent() && read.get().getAclMapping().stream().anyMatch(t -> t.getIndex().equals(id));
}
private String getArtificialAclName(final int index) {
return artificialNamePrefix + index;
}
@Override
public synchronized void removeAcl(@Nonnull final String name, @Nonnull final MappingContext ctx) {
ctx.delete(getAclIid(name));
}
@Override
public synchronized String getAceName(@Nonnull final String aclName, final int aceIndex,
@Nonnull final MappingContext ctx) {
if (!containsAceName(aclName, aceIndex, ctx)) {
final String artificialName = getArtificialAceName(aceIndex);
addAce(aclName, aceIndex, artificialName, ctx);
}
final Optional<AclMapping> read = ctx.read(getAclIid(aclName));
checkState(read.isPresent(), "AclMapping for name: %s is not present. But should be", aclName);
return read.get().getAceMapping().stream()
.filter(t -> t.getIndex().equals(aceIndex))
.collect(SINGLE_ITEM_ACE_COLLECTOR).getName();
}
private boolean containsAceName(@Nonnull final String aclName, final int id, @Nonnull final MappingContext ctx) {
final Optional<AclMapping> read = ctx.read(getAclIid(aclName));
return read.isPresent() && read.get().getAceMapping().stream().anyMatch(t -> t.getIndex().equals(id));
}
private String getArtificialAceName(final int index) {
return artificialNamePrefix + "rule" + index;
}
private KeyedInstanceIdentifier<AclMapping, AclMappingKey> getAclIid(@Nonnull final String name) {
return ctxIid.child(AclMapping.class, new AclMappingKey(name));
}
private void addAce(@Nonnull final String aclName, final int aceIndex, @Nonnull final String aceName,
@Nonnull final MappingContext ctx) {
final AceMappingBuilder aceMapping = new AceMappingBuilder();
aceMapping.setIndex(aceIndex);
aceMapping.setName(aceName);
final KeyedInstanceIdentifier<AceMapping, AceMappingKey> iid =
getAclIid(aclName).child(AceMapping.class, new AceMappingKey(aceName));
ctx.put(iid, aceMapping.build());
}
}
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