1 files changed, 165 insertions, 0 deletions
diff --git a/vpp-classifier/impl/src/main/java/io/fd/hc2vpp/vpp/classifier/write/ClassifySessionWriter.java b/vpp-classifier/impl/src/main/java/io/fd/hc2vpp/vpp/classifier/write/ClassifySessionWriter.java
new file mode 100644
index 000000000..00e858955
--- /dev/null
+++ b/vpp-classifier/impl/src/main/java/io/fd/hc2vpp/vpp/classifier/write/ClassifySessionWriter.java
@@ -0,0 +1,165 @@
+/*
+ * 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.vpp.classifier.write;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import com.google.common.base.Optional;
+import com.google.common.base.Preconditions;
+import io.fd.hc2vpp.common.translate.util.ByteDataTranslator;
+import io.fd.hc2vpp.common.translate.util.JvppReplyConsumer;
+import io.fd.hc2vpp.vpp.classifier.context.VppClassifierContextManager;
+import io.fd.honeycomb.translate.MappingContext;
+import io.fd.honeycomb.translate.spi.write.ListWriterCustomizer;
+import io.fd.honeycomb.translate.write.WriteContext;
+import io.fd.honeycomb.translate.write.WriteFailedException;
+import io.fd.vpp.jvpp.VppBaseCallException;
+import io.fd.vpp.jvpp.core.dto.ClassifyAddDelSession;
+import io.fd.vpp.jvpp.core.dto.ClassifyAddDelSessionReply;
+import io.fd.vpp.jvpp.core.future.FutureJVppCore;
+import java.util.concurrent.CompletionStage;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import javax.xml.bind.DatatypeConverter;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.classifier.rev161214.OpaqueIndex;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.classifier.rev161214.classify.table.base.attributes.ClassifySession;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.classifier.rev161214.classify.table.base.attributes.ClassifySessionKey;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.classifier.rev161214.vpp.classifier.ClassifyTable;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.classifier.rev161214.vpp.classifier.ClassifyTableKey;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Writer customizer responsible for classify session create/delete.<br> Sends {@code classify_add_del_session} message
+ * to VPP.<br> Equivalent to invoking {@code vppctl classify table} command.
+ */
+public class ClassifySessionWriter extends VppNodeWriter
+        implements ListWriterCustomizer<ClassifySession, ClassifySessionKey>, ByteDataTranslator, JvppReplyConsumer {
+
+    private static final Logger LOG = LoggerFactory.getLogger(ClassifySessionWriter.class);
+    private final VppClassifierContextManager classifyTableContext;
+
+    public ClassifySessionWriter(@Nonnull final FutureJVppCore futureJVppCore,
+                                 @Nonnull final VppClassifierContextManager classifyTableContext) {
+        super(futureJVppCore);
+        this.classifyTableContext = checkNotNull(classifyTableContext, "classifyTableContext should not be null");
+    }
+
+    @Override
+    public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<ClassifySession> id,
+                                       @Nonnull final ClassifySession dataAfter,
+                                       @Nonnull final WriteContext writeContext) throws WriteFailedException {
+        LOG.debug("Creating classify session: iid={} dataAfter={}", id, dataAfter);
+        try {
+            classifyAddDelSession(true, id, dataAfter, writeContext);
+            LOG.debug("Successfully created classify session: iid={} dataAfter={}", id, dataAfter);
+        } catch (VppBaseCallException e) {
+            throw new WriteFailedException.CreateFailedException(id, dataAfter, e);
+        }
+    }
+
+    @Override
+    public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<ClassifySession> id,
+                                        @Nonnull final ClassifySession dataBefore,
+                                        @Nonnull final ClassifySession dataAfter,
+                                        @Nonnull final WriteContext writeContext) throws WriteFailedException {
+        throw new UnsupportedOperationException("Classify session update is not supported");
+    }
+
+    @Override
+    public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<ClassifySession> id,
+                                        @Nonnull final ClassifySession dataBefore,
+                                        @Nonnull final WriteContext writeContext) throws WriteFailedException {
+        LOG.debug("Removing classify session: iid={} dataBefore={}", id, dataBefore);
+        try {
+            classifyAddDelSession(false, id, dataBefore, writeContext);
+            LOG.debug("Successfully removed classify session: iid={} dataBefore={}", id, dataBefore);
+        } catch (VppBaseCallException e) {
+            throw new WriteFailedException.DeleteFailedException(id, e);
+        }
+    }
+
+    private void classifyAddDelSession(final boolean isAdd, @Nonnull final InstanceIdentifier<ClassifySession> id,
+                                       @Nonnull final ClassifySession classifySession,
+                                       @Nonnull final WriteContext writeContext)
+            throws VppBaseCallException, WriteFailedException {
+        final ClassifyTableKey tableKey = id.firstKeyOf(ClassifyTable.class);
+        Preconditions.checkArgument(tableKey != null, "could not find classify table key in {}", id);
+
+        final String tableName = tableKey.getName();
+        Preconditions.checkState(classifyTableContext.containsTable(tableName, writeContext.getMappingContext()),
+                "Could not find classify table index for {} in the classify table context", tableName);
+        final int tableIndex = classifyTableContext.getTableIndex(tableName, writeContext.getMappingContext());
+
+        final ClassifyTable classifyTable =
+                getClassifyTable(writeContext, id.firstIdentifierOf(ClassifyTable.class), isAdd);
+        final int hitNextIndex = getNodeIndex(classifySession.getHitNext(), classifyTable, classifyTableContext,
+                writeContext.getMappingContext(), id);
+        final int opaqueIndex =
+                getOpaqueIndex(classifySession.getOpaqueIndex(), classifyTable, writeContext.getMappingContext(), id);
+
+        final CompletionStage<ClassifyAddDelSessionReply> createClassifyTableReplyCompletionStage = getFutureJVpp()
+                .classifyAddDelSession(
+                        getClassifyAddDelSessionRequest(isAdd, classifySession, tableIndex, hitNextIndex, opaqueIndex));
+
+        getReplyForWrite(createClassifyTableReplyCompletionStage.toCompletableFuture(), id);
+    }
+
+    private ClassifyTable getClassifyTable(final WriteContext writeContext,
+                                           @Nonnull final InstanceIdentifier<ClassifyTable> id,
+                                           final boolean isAdd) {
+        final Optional<ClassifyTable> classifyTable;
+        if (isAdd) {
+            classifyTable = writeContext.readAfter(id);
+        } else {
+            classifyTable = writeContext.readBefore(id);
+        }
+        return classifyTable.get();
+    }
+
+    private ClassifyAddDelSession getClassifyAddDelSessionRequest(final boolean isAdd,
+                                                                  @Nonnull final ClassifySession classifySession,
+                                                                  final int tableIndex,
+                                                                  final int hitNextIndex,
+                                                                  final int opaqueIndex) {
+        ClassifyAddDelSession request = new ClassifyAddDelSession();
+        request.isAdd = booleanToByte(isAdd);
+        request.tableIndex = tableIndex;
+        request.hitNextIndex = hitNextIndex;
+        request.opaqueIndex = opaqueIndex;
+
+        // default 0:
+        request.advance = classifySession.getAdvance();
+
+        request.match = DatatypeConverter.parseHexBinary(classifySession.getMatch().getValue().replace(":", ""));
+        return request;
+    }
+
+    private int getOpaqueIndex(@Nullable final OpaqueIndex opaqueIndex, final ClassifyTable classifyTable,
+                               final MappingContext ctx, final InstanceIdentifier<ClassifySession> id)
+            throws VppBaseCallException, WriteFailedException {
+        if (opaqueIndex == null) {
+            return ~0; // value not specified
+        }
+        if (opaqueIndex.getUint32() != null) {
+            return opaqueIndex.getUint32().intValue();
+        } else {
+            return getNodeIndex(opaqueIndex.getVppNode(), classifyTable, classifyTableContext, ctx, id);
+        }
+    }
+}