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diff --git a/samples/interfaces/mapping/src/main/java/io/fd/honeycomb/samples/interfaces/mapping/config/InterfaceWriterCustomizer.java b/samples/interfaces/mapping/src/main/java/io/fd/honeycomb/samples/interfaces/mapping/config/InterfaceWriterCustomizer.java
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+/*
+ * 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.samples.interfaces.mapping.config;
+
+import io.fd.honeycomb.samples.interfaces.mapping.LowerLayerAccess;
+import io.fd.honeycomb.translate.spi.write.ListWriterCustomizer;
+import io.fd.honeycomb.translate.write.WriteContext;
+import io.fd.honeycomb.translate.write.WriteFailedException;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.io.fd.honeycomb.samples.interfaces.rev160810.interfaces.Interface;
+import org.opendaylight.yang.gen.v1.io.fd.honeycomb.samples.interfaces.rev160810.interfaces.InterfaceKey;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This is a customizer responsible for writing(updating and also deleting) Interface config data
+ */
+public class InterfaceWriterCustomizer implements ListWriterCustomizer<Interface, InterfaceKey> {
+
+ private static final Logger LOG = LoggerFactory.getLogger(InterfaceWriterCustomizer.class);
+
+ private final LowerLayerAccess access;
+
+ public InterfaceWriterCustomizer(final LowerLayerAccess access) {
+ this.access = access;
+ }
+
+ @Override
+ public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<Interface> id,
+ @Nonnull final Interface dataAfter, @Nonnull final WriteContext writeContext)
+ throws WriteFailedException {
+ try {
+ // Context can be used just like the context in ReadCustomizer see InterfaceReaderCustomizer
+ // + it also provides a window into the entire configuration tree before current transaction and during current transaction
+ // just in case, some additional data is necessary here
+ access.writeInterface(id, dataAfter, writeContext);
+ } catch (Exception e) {
+ throw new WriteFailedException.CreateFailedException(id, dataAfter, e);
+ }
+ }
+
+ @Override
+ public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<Interface> id,
+ @Nonnull final Interface dataBefore, @Nonnull final Interface dataAfter,
+ @Nonnull final WriteContext writeContext) throws WriteFailedException {
+ // There are cases when lower layer does not support all of the CRUD operations, in which case, the handler
+ // should look like this (This will reject configuration from upper layers, returning error/rpc-error):
+ throw new WriteFailedException.UpdateFailedException(id, dataBefore, dataAfter,
+ new UnsupportedOperationException("Unable to update interface data, unsupported at lower layer"));
+ }
+
+ @Override
+ public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Interface> id,
+ @Nonnull final Interface dataBefore, @Nonnull final WriteContext writeContext)
+ throws WriteFailedException {
+ try {
+ // Context can be used just like the context in ReadCustomizer see InterfaceReaderCustomizer
+ // + it also provides a window into the entire configuration tree before current transaction and during current transaction
+ // just in case, some additional data is necessary here
+ access.deleteInterface(id, dataBefore, writeContext);
+ } catch (Exception e) {
+ throw new WriteFailedException.DeleteFailedException(id, e);
+ }
+ }
+}