1 files changed, 87 insertions, 0 deletions
diff --git a/nsh/impl/src/main/java/io/fd/honeycomb/vppnsh/impl/init/VppNshInitializer.java b/nsh/impl/src/main/java/io/fd/honeycomb/vppnsh/impl/init/VppNshInitializer.java
new file mode 100755
index 000000000..ca13d8a19
--- /dev/null
+++ b/nsh/impl/src/main/java/io/fd/honeycomb/vppnsh/impl/init/VppNshInitializer.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2016 Intel 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.vppnsh.impl.init;
+
+import com.google.inject.Inject;
+import com.google.inject.name.Named;
+import io.fd.honeycomb.data.init.AbstractDataTreeConverter;
+import java.util.stream.Collectors;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+import org.opendaylight.controller.md.sal.binding.api.DataBroker;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.nsh.rev160624.VppNsh;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.nsh.rev160624.VppNshBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.nsh.rev160624.VppNshState;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.nsh.rev160624.vpp.nsh.NshEntries;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.nsh.rev160624.vpp.nsh.NshEntriesBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.nsh.rev160624.vpp.nsh.NshMaps;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.nsh.rev160624.vpp.nsh.NshMapsBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.nsh.rev160624.vpp.nsh.nsh.entries.NshEntry;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.nsh.rev160624.vpp.nsh.nsh.entries.NshEntryBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.nsh.rev160624.vpp.nsh.nsh.maps.NshMap;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.nsh.rev160624.vpp.nsh.nsh.maps.NshMapBuilder;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This is an initializer for VppNsh plugin. Its main goal is to revers-engineer configuration data (config "true")
+ * for Nsh model from operational data. In this case, we are trying to recreate Nsh container from NshsState
+ * container. Thanks to symmetrical nature of the model, it's pretty straightforward.
+ *
+ * This is very useful when the lower layer already contains some data that should be revers-engineer to config data
+ * in honeycomb in order to get HC and lower layer to sync... It makes life of upper layers much easier
+ *
+ * However it's not always possible to perform this task so the initializers are optional for plugins
+ */
+public class VppNshInitializer extends AbstractDataTreeConverter<VppNshState, VppNsh> {
+
+    private static final Logger LOG = LoggerFactory.getLogger(VppNshInitializer.class);
+    private static final InstanceIdentifier<VppNshState> OPER_ID = InstanceIdentifier.create(VppNshState.class);
+    private static final InstanceIdentifier<VppNsh> CFG_ID = InstanceIdentifier.create(VppNsh.class);
+
+    @Inject
+    public VppNshInitializer(@Named("honeycomb-initializer") final DataBroker bindingDataBroker) {
+        super(bindingDataBroker, OPER_ID, CFG_ID);
+    }
+
+    @Override
+    protected VppNsh convert(final VppNshState operationalData) {
+        // Just convert operational data into config data
+        // The operational data are queried from lower layer using readerCustomizers from this plugin
+
+        LOG.info("Initializing VppNsh config data from: {}", operationalData);
+
+        VppNshBuilder vppNshBuilder = new VppNshBuilder();
+
+        NshEntriesBuilder nshEntriesBuilder = new NshEntriesBuilder()
+                .setNshEntry(operationalData.getNshEntries().getNshEntry().stream()
+                        .map(oper -> new NshEntryBuilder(oper).setName(oper.getName()).build())
+                        .collect(Collectors.toList()));
+        vppNshBuilder.setNshEntries(nshEntriesBuilder.build());
+
+        NshMapsBuilder nshMapsBuilder = new NshMapsBuilder()
+                .setNshMap(operationalData.getNshMaps().getNshMap().stream()
+                        .map(oper -> new NshMapBuilder(oper).setName(oper.getName()).build())
+                        .collect(Collectors.toList()));
+        vppNshBuilder.setNshMaps(nshMapsBuilder.build());
+
+        return vppNshBuilder.build();
+    }
+}