1 files changed, 54 insertions, 0 deletions
diff --git a/vnfs/honeycomb_plugin/stream-count/stream-count-impl/src/main/java/io/fd/honeycomb/lcmapi/init/ConfigDataInitializer.java b/vnfs/honeycomb_plugin/stream-count/stream-count-impl/src/main/java/io/fd/honeycomb/lcmapi/init/ConfigDataInitializer.java
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+++ b/vnfs/honeycomb_plugin/stream-count/stream-count-impl/src/main/java/io/fd/honeycomb/lcmapi/init/ConfigDataInitializer.java
@@ -0,0 +1,54 @@
+/*
+ * 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.
+ */
+
+/*
+ * Modifications copyright (c) 2019 AT&T Intellectual Property
+ */
+
+package io.fd.honeycomb.lcmapi.init;
+
+import io.fd.honeycomb.data.init.AbstractDataTreeConverter;
+import com.google.inject.Inject;
+import com.google.inject.name.Named;
+import javax.annotation.Nonnull;
+import org.opendaylight.controller.md.sal.binding.api.DataBroker;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.stream.count.rev190118.StreamCount;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.stream.count.rev190118.StreamCountBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.stream.count.rev190118.StreamCountState;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Initialize configuration data based on operational data.
+ * <p/>
+ * Very useful when a plugin is initiated but the underlying layer already contains some operation state.
+ * Deriving the configuration from existing operational state enables reconciliation in case when Honeycomb's persistence
+ * is not available to do the work for us.
+ */
+public final class ConfigDataInitializer extends AbstractDataTreeConverter<StreamCountState, StreamCount> {
+
+    @Inject
+    public ConfigDataInitializer(@Named("honeycomb-initializer") @Nonnull final DataBroker bindingDataBroker) {
+        super(bindingDataBroker, InstanceIdentifier.create(StreamCountState.class), InstanceIdentifier.create(StreamCount.class));
+    }
+
+    @Override
+    public StreamCount convert(final StreamCountState operationalData) {
+        // Transfer all the operational data into configuration
+        return new StreamCountBuilder()
+                .setStreams(operationalData.getStreams())
+                .build();
+    }
+}