1 files changed, 106 insertions, 0 deletions
diff --git a/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/translate/v3po/interfaces/acl/IetfAclWriter.java b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/translate/v3po/interfaces/acl/IetfAclWriter.java
new file mode 100644
index 000000000..929cec6f1
--- /dev/null
+++ b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/translate/v3po/interfaces/acl/IetfAclWriter.java
@@ -0,0 +1,106 @@
+/*
+ * 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.honeycomb.translate.v3po.interfaces.acl;
+
+import io.fd.honeycomb.translate.spi.write.ListWriterCustomizer;
+import io.fd.honeycomb.translate.write.WriteContext;
+import io.fd.honeycomb.translate.write.WriteFailedException;
+import java.util.Optional;
+import java.util.stream.Stream;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.AccessLists;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.AclBase;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.access.lists.Acl;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160708.access.lists.AclKey;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.Interfaces;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VppInterfaceAugmentation;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Writer customizer responsible for Access Control Lists management. Does not send any messages to VPP. All the config
+ * data are stored in HC and used when acl is assigned/unassigned to/from an interface.
+ *
+ * ACLs that are currently assigned to an interface cannot be updated/deleted.
+ */
+public class IetfAclWriter implements ListWriterCustomizer<Acl, AclKey> {
+
+    public static final InstanceIdentifier<AccessLists> ACL_ID =
+        InstanceIdentifier.create(AccessLists.class);
+
+    private static final Logger LOG = LoggerFactory.getLogger(IetfAclWriter.class);
+
+    @Override
+    public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<Acl> id, @Nonnull final Acl dataAfter,
+                                       @Nonnull final WriteContext writeContext) throws WriteFailedException {
+        LOG.debug("Creating ACL: iid={} dataAfter={}", id, dataAfter);
+
+        // no vpp call, just updates DataTree
+    }
+
+    @Override
+    public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<Acl> id, @Nonnull final Acl dataBefore,
+                                        @Nonnull final Acl dataAfter, @Nonnull final WriteContext writeContext)
+        throws WriteFailedException {
+        LOG.debug("Updating ACL: iid={} dataBefore={} dataAfter={}", id, dataBefore, dataAfter);
+
+        if (isAssigned(dataAfter, writeContext)) {
+            throw new WriteFailedException(id,
+                String.format("Failed to update data at %s: acl %s is already assigned", id, dataAfter));
+        }
+
+        LOG.debug("Updating unassigned ACL: iid={} dataBefore={} dataAfter={}", id, dataBefore, dataAfter);
+
+        // no vpp call, just updates DataTree
+    }
+
+    @Override
+    public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Acl> id, @Nonnull final Acl dataBefore,
+                                        @Nonnull final WriteContext writeContext) throws WriteFailedException {
+        LOG.debug("Deleting ACL: iid={} dataBefore={}", id, dataBefore);
+
+        if (isAssigned(dataBefore, writeContext)) {
+            throw new WriteFailedException(id,
+                String.format("Failed to delete data at %s: acl %s is already assigned", id, dataBefore));
+        }
+
+        LOG.debug("Deleting unassigned ACL: iid={} dataBefore={}", id, dataBefore);
+
+        // no vpp call, just updates DataTree
+    }
+
+    private static boolean isAssigned(@Nonnull final Acl acl,
+                                      @Nonnull final WriteContext writeContext) {
+        final String aclName = acl.getAclName();
+        final Class<? extends AclBase> aclType = acl.getAclType();
+        final Interfaces interfaces = writeContext.readAfter(InstanceIdentifier.create(Interfaces.class)).get();
+
+        return interfaces.getInterface().stream()
+            .map(i -> Optional.ofNullable(i.getAugmentation(VppInterfaceAugmentation.class))
+                .map(aug -> aug.getIetfAcl())
+                .map(ietfAcl -> ietfAcl.getIngress())
+                .map(ingress -> ingress.getAccessLists())
+                .map(accessLists -> accessLists.getAcl())
+            )
+            .flatMap(iacl -> iacl.isPresent()
+                ? iacl.get().stream()
+                : Stream.empty())
+            .filter(assignedAcl -> aclName.equals(assignedAcl.getName()) && aclType.equals(assignedAcl.getType()))
+            .findFirst().isPresent();
+    }
+}