1 files changed, 108 insertions, 0 deletions
diff --git a/srv6/srv6-impl/src/main/java/io/fd/hc2vpp/srv6/util/PolicyContextManagerImpl.java b/srv6/srv6-impl/src/main/java/io/fd/hc2vpp/srv6/util/PolicyContextManagerImpl.java
new file mode 100644
index 000000000..1997043e2
--- /dev/null
+++ b/srv6/srv6-impl/src/main/java/io/fd/hc2vpp/srv6/util/PolicyContextManagerImpl.java
@@ -0,0 +1,108 @@
+/*
+ * 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 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.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.Contexts;
+import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.policy.context.rev180607.Srv6PolicyContextAugmentation;
+import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.policy.context.rev180607.srv6.policy.context.attributes.Srv6PolicyMappings;
+import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.policy.context.rev180607.srv6.policy.context.attributes.srv6.policy.mappings.Srv6PolicyMapping;
+import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.policy.context.rev180607.srv6.policy.context.attributes.srv6.policy.mappings.Srv6PolicyMappingBuilder;
+import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.policy.context.rev180607.srv6.policy.context.attributes.srv6.policy.mappings.Srv6PolicyMappingKey;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6Address;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
+
+/**
+ * Facade on top of {@link MappingContext} that manages {@link Srv6PolicyMappings}.
+ */
+@ThreadSafe
+public class PolicyContextManagerImpl implements PolicyContextManager {
+
+    private final InstanceIdentifier<Srv6PolicyMappings> ctxIid;
+    // 2001:db8::/32 This address range is used for documentation and example source code. We can use it as dummy
+    // addresses for our artificial policies
+    private static final String DUMMY_EP = "2001:db8::";
+    private Long artificialColor;
+
+    public PolicyContextManagerImpl() {
+        this.ctxIid = InstanceIdentifier.create(Contexts.class)
+                .augmentation(Srv6PolicyContextAugmentation.class)
+                .child(Srv6PolicyMappings.class);
+        this.artificialColor = 0L;
+    }
+
+    @Override
+    public void addPolicy(@Nonnull final String name, @Nonnull final Long color, @Nonnull final Ipv6Address endpoint,
+                          @Nonnull final Ipv6Address bsid, @Nonnull final MappingContext ctx) {
+        final KeyedInstanceIdentifier<Srv6PolicyMapping, Srv6PolicyMappingKey> mappingIid = getPolicyIid(bsid);
+        final Srv6PolicyMappingBuilder builder =
+                new Srv6PolicyMappingBuilder().setKey(new Srv6PolicyMappingKey(bsid)).setColor(color)
+                        .setEndpoint(endpoint).setBsid(bsid).setName(name);
+        ctx.put(mappingIid, builder.build());
+    }
+
+    private KeyedInstanceIdentifier<Srv6PolicyMapping, Srv6PolicyMappingKey> getPolicyIid(final Ipv6Address bsid) {
+        return ctxIid.child(Srv6PolicyMapping.class, new Srv6PolicyMappingKey(bsid));
+    }
+
+    @Nonnull
+    public synchronized Srv6PolicyMapping getPolicy(@Nonnull final Ipv6Address bsid,
+                                                    @Nonnull final MappingContext ctx) {
+        final Optional<Srv6PolicyMapping> read = ctx.read(getPolicyIid(bsid));
+        if (read.isPresent()) {
+            return read.get();
+        }
+
+        //if not present we need to generate artificial mapping
+        Long nextArtificialColor = getNextArtificialColor();
+        Ipv6Address endpoint = new Ipv6Address(DUMMY_EP + nextArtificialColor);
+        Srv6PolicyMapping mapping =
+                new Srv6PolicyMappingBuilder().setBsid(bsid).setColor(nextArtificialColor).setEndpoint(endpoint)
+                        .setName(bsid.getValue()).build();
+        addPolicy(mapping.getName(), mapping.getColor(), mapping.getEndpoint(), mapping.getBsid(), ctx);
+        return mapping;
+    }
+
+    @Override
+    public Ipv6Address getPolicyBsid(@Nonnull Long color, @Nonnull Ipv6Address endpoint,
+                                     @Nonnull final MappingContext ctx) {
+        Optional<Srv6PolicyMappings> read = ctx.read(ctxIid);
+        if (read.isPresent()) {
+            return read.get().getSrv6PolicyMapping().stream()
+                    .filter(srv6PolicyMapping -> srv6PolicyMapping.getColor().equals(color) &&
+                            srv6PolicyMapping.getEndpoint().equals(endpoint))
+                    .map(Srv6PolicyMapping::getBsid).findFirst().orElse(null);
+        }
+        return null;
+    }
+
+    @Override
+    public void removePolicy(@Nonnull final Ipv6Address bsid, @Nonnull final MappingContext ctx) {
+        final KeyedInstanceIdentifier<Srv6PolicyMapping, Srv6PolicyMappingKey> mappingIid = getPolicyIid(bsid);
+        ctx.delete(mappingIid);
+    }
+
+    private synchronized Long getNextArtificialColor() {
+        artificialColor++;
+        return artificialColor;
+    }
+}