HONEYCOMB-130: Separate v3po plugin from HC infra

Creating folders:
- common/
- infra/
- v3po/
- vpp-common/

Change-Id: I2c39e1b17e39e7c0f0628f44aa5fe08563fa06e4
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>

20 files changed, 1214 insertions, 0 deletions

diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/DumpCacheManager.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/DumpCacheManager.java
new file mode 100644
index 000000000..e5adb54ad
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/DumpCacheManager.java
@@ -0,0 +1,124 @@
+/*
+ * 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.util.cache;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import com.google.common.base.Optional;
+import io.fd.honeycomb.translate.v3po.util.cache.exceptions.check.DumpCheckFailedException;
+import io.fd.honeycomb.translate.v3po.util.cache.exceptions.execution.DumpExecutionFailedException;
+import io.fd.honeycomb.translate.v3po.util.cache.noop.NoopDumpPostProcessingFunction;
+import io.fd.honeycomb.v3po.translate.ModificationCache;
+import javax.annotation.Nonnull;
+import org.openvpp.jvpp.dto.JVppReplyDump;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Manager responsible for returning Data object dumps<br> either from cache or by invoking specified {@link
+ * EntityDumpExecutor}
+ */
+public final class DumpCacheManager<T extends JVppReplyDump, U> {
+
+    private static final Logger LOG = LoggerFactory.getLogger(DumpCacheManager.class);
+
+    private final EntityDumpExecutor<T, U> dumpExecutor;
+    private final EntityDumpNonEmptyCheck<T> dumpNonEmptyCheck;
+    private final EntityDumpPostProcessingFunction<T> postProcessor;
+
+    private DumpCacheManager(DumpCacheManagerBuilder<T, U> builder) {
+        this.dumpExecutor = builder.dumpExecutor;
+        this.dumpNonEmptyCheck = builder.dumpNonEmptyCheck;
+        this.postProcessor = builder.postProcessingFunction;
+    }
+
+    /**
+     * Returns {@link Optional<T>} of dump
+     */
+    public Optional<T> getDump(@Nonnull String entityKey, @Nonnull ModificationCache cache)
+            throws DumpExecutionFailedException {
+
+        //this key binding to every log has its logic ,because every customizer have its own cache manager and if
+        //there is need for debugging/fixing some complex call with a lot of data,you can get lost in those logs
+        LOG.debug("Loading dump for KEY[{}]", entityKey);
+
+        T dump = (T) cache.get(entityKey);
+
+        if (dump == null) {
+            LOG.debug("Dump for KEY[{}] not present in cache,invoking dump executor", entityKey);
+
+            dump = dumpExecutor.executeDump();
+
+            //this is not a critical exception, so its only logged here
+            try {
+                dumpNonEmptyCheck.assertNotEmpty(dump);
+            } catch (DumpCheckFailedException e) {
+                LOG.warn("Dump for KEY[{}] has been resolved as empty", entityKey, e);
+                return Optional.absent();
+            }
+
+            //no need to check if post processor active,if wasnt set,default no-op will be used
+            LOG.debug("Post-processing dump for KEY[{}]", entityKey);
+            dump = postProcessor.apply(dump);
+
+            LOG.debug("Caching dump for KEY[{}]", entityKey);
+            cache.put(entityKey, dump);
+            return Optional.of(dump);
+        } else {
+            return Optional.of(dump);
+        }
+    }
+
+    public static final class DumpCacheManagerBuilder<T extends JVppReplyDump, U> {
+
+        private EntityDumpExecutor<T, U> dumpExecutor;
+        private EntityDumpNonEmptyCheck<T> dumpNonEmptyCheck;
+        private EntityDumpPostProcessingFunction<T> postProcessingFunction;
+
+        public DumpCacheManagerBuilder() {
+            //for cases when user does not set specific post-processor
+            postProcessingFunction = new NoopDumpPostProcessingFunction<T>();
+        }
+
+        public DumpCacheManagerBuilder<T, U> withExecutor(@Nonnull EntityDumpExecutor<T, U> executor) {
+            this.dumpExecutor = executor;
+            return this;
+        }
+
+        public DumpCacheManagerBuilder<T, U> withNonEmptyPredicate(@Nonnull EntityDumpNonEmptyCheck<T> check) {
+            this.dumpNonEmptyCheck = check;
+            return this;
+        }
+
+        public DumpCacheManagerBuilder<T, U> withPostProcessingFunction(
+                EntityDumpPostProcessingFunction<T> postProcessingFunction) {
+            this.postProcessingFunction = postProcessingFunction;
+            return this;
+        }
+
+        public DumpCacheManager<T, U> build() {
+            checkNotNull(dumpExecutor, "Dump executor cannot be null");
+            checkNotNull(dumpNonEmptyCheck, "Dump verifier cannot be null");
+            checkNotNull(postProcessingFunction,
+                    "Dump post-processor cannot be null cannot be null, default implementation is used if its not set");
+
+            return new DumpCacheManager<>(this);
+        }
+    }
+}
+
+
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/EntityDumpExecutor.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/EntityDumpExecutor.java
new file mode 100644
index 000000000..b25c59a8a
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/EntityDumpExecutor.java
@@ -0,0 +1,41 @@
+/*
+ * 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.util.cache;
+
+import io.fd.honeycomb.translate.v3po.util.cache.exceptions.execution.DumpExecutionFailedException;
+import org.openvpp.jvpp.dto.JVppReplyDump;
+
+/**
+ * Generic interface for classes that return dumps for Data objects
+ */
+public interface EntityDumpExecutor<T extends JVppReplyDump, U> {
+
+    /**
+     * Performs dump on {link T} entity
+     *
+     * @return dump of specified {@link T} entity
+     * @throws DumpExecutionFailedException when dump fails
+     */
+    public T executeDump() throws DumpExecutionFailedException;
+
+    /**
+     * Bind dumping params for executor
+     */
+    default public void bindDumpParams(U params) {
+        throw new UnsupportedOperationException("You should override this method if you need to bind dumping params");
+    }
+}
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/EntityDumpNonEmptyCheck.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/EntityDumpNonEmptyCheck.java
new file mode 100644
index 000000000..d64e312fe
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/EntityDumpNonEmptyCheck.java
@@ -0,0 +1,33 @@
+/*
+ * 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.util.cache;
+
+import io.fd.honeycomb.translate.v3po.util.cache.exceptions.check.DumpCheckFailedException;
+import io.fd.honeycomb.translate.v3po.util.cache.exceptions.check.i.DumpEmptyException;
+import org.openvpp.jvpp.dto.JVppReplyDump;
+
+/**
+ * Generic interface for classes that verifies if dump of data object is non-empty
+ */
+public interface EntityDumpNonEmptyCheck<T extends JVppReplyDump> {
+
+    /**
+     * Verifies if data are non-empty,if not throws {@link DumpEmptyException}
+     * @throws DumpEmptyException
+     */
+    public void assertNotEmpty(T data) throws DumpCheckFailedException;
+}
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/EntityDumpPostProcessingFunction.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/EntityDumpPostProcessingFunction.java
new file mode 100644
index 000000000..2bc2446e9
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/EntityDumpPostProcessingFunction.java
@@ -0,0 +1,36 @@
+/*
+ * 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.util.cache;
+
+import java.util.function.Function;
+import org.openvpp.jvpp.dto.JVppReplyDump;
+
+/**
+ * Generic interface for class that are post-processing data dumped from vpp
+ */
+@FunctionalInterface
+public interface EntityDumpPostProcessingFunction<T extends JVppReplyDump> extends Function<T, T> {
+
+
+    /**
+     * Performs postprocessing on dumped data
+     *
+     * @return Post-processed data
+     */
+    @Override
+    T apply(T t);
+}
\ No newline at end of file
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/exceptions/check/DumpCheckFailedException.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/exceptions/check/DumpCheckFailedException.java
new file mode 100644
index 000000000..39dabb62f
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/exceptions/check/DumpCheckFailedException.java
@@ -0,0 +1,31 @@
+/*
+ * 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.util.cache.exceptions.check;
+
+/**
+ * Abstract parent of exceptions thrown while checking if dump is not empty
+ */
+public abstract class DumpCheckFailedException extends Exception {
+
+    public DumpCheckFailedException(String message) {
+        super(message);
+    }
+
+    public DumpCheckFailedException(String message, Exception cause) {
+        super(message, cause);
+    }
+}
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/exceptions/check/i/DumpEmptyException.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/exceptions/check/i/DumpEmptyException.java
new file mode 100644
index 000000000..8acaf1c9f
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/exceptions/check/i/DumpEmptyException.java
@@ -0,0 +1,40 @@
+/*
+ * 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.util.cache.exceptions.check.i;
+
+import io.fd.honeycomb.translate.v3po.util.cache.EntityDumpNonEmptyCheck;
+import io.fd.honeycomb.translate.v3po.util.cache.exceptions.check.DumpCheckFailedException;
+
+/**
+ * This exception occurs when dump is resolved as empty by {@link EntityDumpNonEmptyCheck}
+ */
+public class DumpEmptyException extends DumpCheckFailedException {
+
+    /**
+     * Creates {@link DumpEmptyException} with specified reason
+     */
+    public DumpEmptyException(String reason) {
+        super(reason);
+    }
+
+    /**
+     * Creates {@link DumpEmptyException} with specified reason and sub-exception
+     */
+    public DumpEmptyException(String reason, Exception e) {
+        super(reason, e);
+    }
+}
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/exceptions/execution/DumpExecutionFailedException.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/exceptions/execution/DumpExecutionFailedException.java
new file mode 100644
index 000000000..ba249b6c0
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/exceptions/execution/DumpExecutionFailedException.java
@@ -0,0 +1,27 @@
+/*
+ * 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.util.cache.exceptions.execution;
+
+/**
+ * Default parent for all exceptions connected to dumping of VPP data
+ */
+public abstract class DumpExecutionFailedException extends Exception {
+
+    public DumpExecutionFailedException(String message, Exception cause) {
+        super(message, cause);
+    }
+}
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/exceptions/execution/i/DumpCallFailedException.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/exceptions/execution/i/DumpCallFailedException.java
new file mode 100644
index 000000000..02b8722ab
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/exceptions/execution/i/DumpCallFailedException.java
@@ -0,0 +1,34 @@
+/*
+ * 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.util.cache.exceptions.execution.i;
+
+import io.fd.honeycomb.translate.v3po.util.cache.exceptions.execution.DumpExecutionFailedException;
+import org.openvpp.jvpp.VppBaseCallException;
+
+/**
+ * Wrapper exception for {@link org.openvpp.jvpp.VppBaseCallException} during dumping
+ */
+public class DumpCallFailedException extends DumpExecutionFailedException {
+
+    public DumpCallFailedException(String message, VppBaseCallException cause) {
+        super(message, cause);
+    }
+
+    public static final DumpCallFailedException wrapFailedCallException(String message, VppBaseCallException cause) {
+        return new DumpCallFailedException(message, cause);
+    }
+}
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/exceptions/execution/i/DumpTimeoutException.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/exceptions/execution/i/DumpTimeoutException.java
new file mode 100644
index 000000000..4bc825408
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/exceptions/execution/i/DumpTimeoutException.java
@@ -0,0 +1,35 @@
+/*
+ * 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.util.cache.exceptions.execution.i;
+
+import io.fd.honeycomb.translate.v3po.util.cache.exceptions.execution.DumpExecutionFailedException;
+import java.util.concurrent.TimeoutException;
+
+/**
+ * Exception thrown when dump call ends in timeout
+ */
+public class DumpTimeoutException extends DumpExecutionFailedException {
+
+    public DumpTimeoutException(String message, TimeoutException cause) {
+        super(message, cause);
+
+    }
+
+    public static final DumpTimeoutException wrapTimeoutException(String message, TimeoutException cause) {
+        return new DumpTimeoutException(message, cause);
+    }
+}
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/noop/NoopDumpPostProcessingFunction.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/noop/NoopDumpPostProcessingFunction.java
new file mode 100644
index 000000000..58bfe6f0b
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/translate/v3po/util/cache/noop/NoopDumpPostProcessingFunction.java
@@ -0,0 +1,33 @@
+/*
+ * 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.util.cache.noop;
+
+import io.fd.honeycomb.translate.v3po.util.cache.EntityDumpPostProcessingFunction;
+import org.openvpp.jvpp.dto.JVppReplyDump;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class NoopDumpPostProcessingFunction<T extends JVppReplyDump> implements EntityDumpPostProcessingFunction<T> {
+
+    private static final Logger LOG = LoggerFactory.getLogger(NoopDumpPostProcessingFunction.class);
+
+    @Override
+    public T apply(final T t) {
+        LOG.debug("Default post processing function called for {}", t);
+        return t;
+    }
+}
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/AbstractInterfaceTypeCustomizer.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/AbstractInterfaceTypeCustomizer.java
new file mode 100644
index 000000000..1f2fbd838
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/AbstractInterfaceTypeCustomizer.java
@@ -0,0 +1,103 @@
+/*
+ * 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.v3po.translate.v3po.util;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkState;
+
+import com.google.common.base.Optional;
+import io.fd.honeycomb.v3po.translate.spi.write.WriterCustomizer;
+import io.fd.honeycomb.v3po.translate.write.WriteContext;
+import io.fd.honeycomb.v3po.translate.write.WriteFailedException;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.InterfaceType;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.openvpp.jvpp.future.FutureJVpp;
+
+/**
+ * Validation WriteCustomizers for Interface subnodes.
+ * Validates the type of interface.
+ *
+ * TODO this should be validated on model/DataTree level. However DataTree does not enforce When conditions
+ * Delete this class when DataTree handles when constraints properly
+ */
+public abstract class AbstractInterfaceTypeCustomizer<D extends DataObject>
+    extends FutureJVppCustomizer implements WriterCustomizer<D> {
+
+    protected AbstractInterfaceTypeCustomizer(final FutureJVpp futureJvpp) {
+        super(futureJvpp);
+    }
+
+    private void checkProperInterfaceType(@Nonnull final WriteContext writeContext,
+                                          @Nonnull final InstanceIdentifier<D> id) {
+        final InstanceIdentifier<Interface> ifcTypeFromIid = id.firstIdentifierOf(Interface.class);
+        checkArgument(ifcTypeFromIid != null, "Instance identifier does not contain {} type", Interface.class);
+        checkArgument(id.firstKeyOf(Interface.class) != null, "Instance identifier does not contain keyed {} type",
+            Interface.class);
+        final Optional<Interface> interfaceConfig = writeContext.readAfter(ifcTypeFromIid);
+        checkState(interfaceConfig.isPresent(),
+            "Unable to get Interface configuration for an interface: %s currently being updated", ifcTypeFromIid);
+
+        IllegalInterfaceTypeException
+            .checkInterfaceType(interfaceConfig.get(), getExpectedInterfaceType());
+    }
+
+    protected abstract Class<? extends InterfaceType> getExpectedInterfaceType();
+
+    /**
+     * Validate expected interface type
+     */
+    @Override
+    public final void writeCurrentAttributes(@Nonnull final InstanceIdentifier<D> id, @Nonnull final D dataAfter,
+                                       @Nonnull final WriteContext writeContext) throws WriteFailedException {
+        checkProperInterfaceType(writeContext, id);
+        writeInterface(id, dataAfter, writeContext);
+    }
+
+    protected abstract void writeInterface(final InstanceIdentifier<D> id, final D dataAfter,
+                                           final WriteContext writeContext)
+        throws WriteFailedException;
+
+    // Validation for update and delete is not necessary
+
+    /**
+     * Indicates unexpected interface type
+     */
+    protected static final class IllegalInterfaceTypeException extends IllegalArgumentException {
+
+        private IllegalInterfaceTypeException(final String msg) {
+            super(msg);
+        }
+
+        /**
+         * Check the type of interface equals expected type
+         *
+         * @throws IllegalInterfaceTypeException if type of interface is null or not expected
+         */
+        static void checkInterfaceType(@Nonnull final Interface ifc,
+                                       @Nonnull final Class<? extends InterfaceType> expectedType) {
+            if (ifc.getType() == null || !expectedType.equals(ifc.getType())) {
+                throw new IllegalInterfaceTypeException(String.format(
+                    "Unexpected interface type: %s for interface: %s. Expected interface is: %s", ifc.getType(),
+                    ifc.getName(), expectedType));
+            }
+        }
+
+    }
+}
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/FutureJVppCustomizer.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/FutureJVppCustomizer.java
new file mode 100644
index 000000000..3f4f1f5ce
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/FutureJVppCustomizer.java
@@ -0,0 +1,45 @@
+/*
+ * 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.v3po.translate.v3po.util;
+
+import com.google.common.annotations.Beta;
+import com.google.common.base.Preconditions;
+import org.openvpp.jvpp.future.FutureJVpp;
+
+import javax.annotation.Nonnull;
+
+/**
+ * Abstract utility to hold the vppApi reference.
+ */
+@Beta
+public abstract class FutureJVppCustomizer {
+
+    private final FutureJVpp futureJvpp;
+
+    public FutureJVppCustomizer(@Nonnull final FutureJVpp futureJvpp) {
+        this.futureJvpp = Preconditions.checkNotNull(futureJvpp, "futureJvpp should not be null");
+    }
+
+    /**
+     * Get vppApi reference
+     *
+     * @return vppApi reference
+     */
+    public FutureJVpp getFutureJVpp() {
+        return futureJvpp;
+    }
+}
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/NamingContext.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/NamingContext.java
new file mode 100644
index 000000000..f6e0e6d48
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/NamingContext.java
@@ -0,0 +1,188 @@
+/*
+ * 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.v3po.translate.v3po.util;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkState;
+
+import com.google.common.base.Optional;
+import io.fd.honeycomb.v3po.translate.MappingContext;
+import io.fd.honeycomb.v3po.translate.util.RWUtils;
+import java.util.stream.Collector;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.Contexts;
+import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.contexts.NamingContextKey;
+import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.contexts.naming.context.Mappings;
+import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.contexts.naming.context.mappings.Mapping;
+import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.contexts.naming.context.mappings.MappingBuilder;
+import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.contexts.naming.context.mappings.MappingKey;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Utility adapter on top of {@link MappingContext} storing integer to string mappings according to naming-context yang
+ * model
+ */
+public final class NamingContext implements AutoCloseable {
+
+    private static final Logger LOG = LoggerFactory.getLogger(NamingContext.class);
+
+    private final String artificialNamePrefix;
+    private final KeyedInstanceIdentifier<org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.contexts.NamingContext, NamingContextKey>
+        namingContextIid;
+
+    private static final Collector<Mapping, ?, Mapping> SINGLE_ITEM_COLLECTOR = RWUtils.singleItemCollector();
+
+    /**
+     * Create new naming context
+     *
+     * @param artificialNamePrefix artificial name to be used for items without a name in VPP (or not provided)
+     * @param instanceName name of this context instance. Will be used as list item identifier within context data tree
+     */
+    public NamingContext(@Nonnull final String artificialNamePrefix, @Nonnull final String instanceName) {
+        this.artificialNamePrefix = artificialNamePrefix;
+        namingContextIid = InstanceIdentifier.create(Contexts.class).child(
+            org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.contexts.NamingContext.class,
+            new NamingContextKey(instanceName));
+    }
+
+    /**
+     * Retrieve name for mapping stored provided mappingContext instance. If not present, artificial name will be
+     * generated.
+     *
+     * @param index index of a mapped item
+     * @param mappingContext mapping context providing context data for current transaction
+     *
+     * @return name mapped to provided index
+     */
+    @Nonnull
+    public synchronized String getName(final int index, @Nonnull final MappingContext mappingContext) {
+        if (!containsName(index, mappingContext)) {
+            final String artificialName = getArtificialName(index);
+            addName(index, artificialName, mappingContext);
+        }
+
+        final Optional<Mappings> read = mappingContext.read(namingContextIid.child(Mappings.class));
+        checkState(read.isPresent(), "Mapping for index: %s is not present. But should be", index);
+
+        return read.get().getMapping().stream()
+            .filter(mapping -> mapping.getIndex().equals(index))
+            .collect(SINGLE_ITEM_COLLECTOR).getName();
+    }
+
+    /**
+     * Retrieve name for mapping stored provided mappingContext instance. if present
+     *
+     * @param index index of a mapped item
+     * @param mappingContext mapping context providing context data for current transaction
+     *
+     * @return name mapped to provided index
+     */
+    @Nonnull
+    public synchronized Optional<String> getNameIfPresent(final int index,
+                                                          @Nonnull final MappingContext mappingContext) {
+        final Optional<Mappings> read = mappingContext.read(namingContextIid.child(Mappings.class));
+
+        return read.isPresent()
+                ? Optional.of(read.get().getMapping().stream()
+                    .filter(mapping -> mapping.getIndex().equals(index))
+                    .collect(SINGLE_ITEM_COLLECTOR)
+                    .getName())
+                : Optional.absent();
+    }
+
+    /**
+     * Check whether mapping is present for index.
+     *
+     * @param index index of a mapped item
+     * @param mappingContext mapping context providing context data for current transaction
+     *
+     * @return true if present, false otherwise
+     */
+    public synchronized boolean containsName(final int index, @Nonnull final MappingContext mappingContext) {
+        final Optional<Mappings> read = mappingContext.read(namingContextIid.child(Mappings.class));
+        return read.isPresent()
+            ? read.get().getMapping().stream().anyMatch(mapping -> mapping.getIndex().equals(index))
+            : false;
+    }
+
+
+    /**
+     * Add mapping to current context
+     *
+     * @param index index of a mapped item
+     * @param name name of a mapped item
+     * @param mappingContext mapping context providing context data for current transaction
+     */
+    public synchronized void addName(final int index, final String name, final MappingContext mappingContext) {
+        final KeyedInstanceIdentifier<Mapping, MappingKey> mappingIid = getMappingIid(name);
+        mappingContext.put(mappingIid, new MappingBuilder().setIndex(index).setName(name).build());
+    }
+
+    private KeyedInstanceIdentifier<Mapping, MappingKey> getMappingIid(final String name) {
+        return namingContextIid.child(Mappings.class).child(Mapping.class, new MappingKey(name));
+    }
+
+    /**
+     * Remove mapping from current context
+     *
+     * @param name name of a mapped item
+     * @param mappingContext mapping context providing context data for current transaction
+     */
+    public synchronized void removeName(final String name, final MappingContext mappingContext) {
+        mappingContext.delete(getMappingIid(name));
+    }
+
+    /**
+     * Returns index value associated with the given name.
+     *
+     * @param name the name whose associated index value is to be returned
+     * @param mappingContext mapping context providing context data for current transaction
+     *
+     * @return integer index value matching supplied name
+     * @throws IllegalArgumentException if name was not found
+     */
+    public synchronized int getIndex(final String name, final MappingContext mappingContext) {
+        final Optional<Mapping> read = mappingContext.read(getMappingIid(name));
+        checkArgument(read.isPresent(), "No mapping stored for name: %s", name);
+        return read.get().getIndex();
+
+    }
+
+    /**
+     * Check whether mapping is present for name.
+     *
+     * @param name name of a mapped item
+     * @param mappingContext mapping context providing context data for current transaction
+     *
+     * @return true if present, false otherwise
+     */
+    public synchronized boolean containsIndex(final String name, final MappingContext mappingContext) {
+        return mappingContext.read(getMappingIid(name)).isPresent();
+    }
+
+    private String getArtificialName(final int index) {
+        return artificialNamePrefix + index;
+    }
+
+    @Override
+    public void close() throws Exception {
+        /// Not removing the mapping from backing storage
+    }
+}
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/ReadTimeoutException.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/ReadTimeoutException.java
new file mode 100644
index 000000000..654b13825
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/ReadTimeoutException.java
@@ -0,0 +1,33 @@
+/*
+ * 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.v3po.translate.v3po.util;
+
+import com.google.common.annotations.Beta;
+import io.fd.honeycomb.v3po.translate.read.ReadFailedException;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Thrown when read method invocation times out.
+ */
+@Beta
+public class ReadTimeoutException extends ReadFailedException {
+
+    public ReadTimeoutException(final InstanceIdentifier<?> id, final Throwable cause) {
+        super(id, cause);
+    }
+
+}
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/SubInterfaceUtils.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/SubInterfaceUtils.java
new file mode 100644
index 000000000..1df82af73
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/SubInterfaceUtils.java
@@ -0,0 +1,28 @@
+/*
+ * 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.v3po.translate.v3po.util;
+
+public final class SubInterfaceUtils {
+
+    private SubInterfaceUtils() {
+        throw new UnsupportedOperationException("Utility class cannot be instantiated.");
+    }
+
+    public static String getSubInterfaceName(final String superIfName, final int subIfaceId) {
+        return String.format("%s.%d", superIfName, subIfaceId);
+    }
+}
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/TagRewriteOperation.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/TagRewriteOperation.java
new file mode 100644
index 000000000..316d1f8e2
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/TagRewriteOperation.java
@@ -0,0 +1,86 @@
+/*
+ * 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.v3po.translate.v3po.util;
+
+import com.google.common.base.Preconditions;
+import com.google.common.primitives.UnsignedBytes;
+import javax.annotation.Nonnegative;
+import javax.annotation.Nullable;
+
+/**
+ * Defines vlan tag rewrite config options for VPP
+ *
+ * TODO corresponding enum (defined in l2_vtr.h) should be defined in vpe.api
+ * (does vpp's IDL support enum type definition?)
+ * which would allow to generate this class in jvpp
+ */
+public enum TagRewriteOperation {
+    disabled(0),
+    push_1(0),
+    push_2(0),
+    pop_1(1),
+    pop_2(2),
+    translate_1_to_1(1),
+    translate_1_to_2(1),
+    translate_2_to_1(2),
+    translate_2_to_2(2);
+
+    private final static int MAX_INDEX = 3;
+    private final int code;
+    private final byte popTags;
+
+    TagRewriteOperation(final int popTags) {
+        this.code = this.ordinal();
+        this.popTags = UnsignedBytes.checkedCast(popTags);
+    }
+
+    private static TagRewriteOperation[][] translation = new TagRewriteOperation[][] {
+        {disabled, push_1, push_2},
+        {pop_1, translate_1_to_1, translate_1_to_2},
+        {pop_2, translate_2_to_1, translate_2_to_2}
+    };
+
+    /**
+     * Returns VPP tag rewrite operation for given number of tags to pop and tags to push.
+     * @param toPop number of tags to pop (0..2)
+     * @param toPush number of tags to push (0..2)
+     * @return vpp tag rewrite operation for given input parameters
+     */
+    public static TagRewriteOperation get(@Nonnegative final int toPop, @Nonnegative final int toPush) {
+        Preconditions.checkElementIndex(toPop, MAX_INDEX, "Illegal number of tags to pop");
+        Preconditions.checkElementIndex(toPush, MAX_INDEX, "Illegal number of tags to push");
+        return translation[toPop][toPush];
+    }
+
+    /**
+     * Returns VPP tag rewrite operation for given operation code.
+     * @param code VPP tag rewrite operation code
+     * @return vpp tag rewrite operation for given input parameter
+     */
+    @Nullable
+    public static TagRewriteOperation get(@Nonnegative final int code) {
+        for (TagRewriteOperation operation : TagRewriteOperation.values()) {
+            if (code == operation.code){
+                return operation;
+            }
+        }
+        return null;
+    }
+
+    public byte getPopTags() {
+        return popTags;
+    }
+}
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/TranslateUtils.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/TranslateUtils.java
new file mode 100644
index 000000000..1a6a50133
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/TranslateUtils.java
@@ -0,0 +1,225 @@
+/*
+ * 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.v3po.translate.v3po.util;
+
+import static com.google.common.base.Preconditions.checkArgument;
+
+import com.google.common.base.Splitter;
+import com.google.common.net.InetAddresses;
+import java.net.UnknownHostException;
+import java.util.Arrays;
+import java.util.List;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.function.BiConsumer;
+import javax.annotation.Nonnegative;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4AddressNoZone;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.openvpp.jvpp.VppBaseCallException;
+import org.openvpp.jvpp.dto.JVppReply;
+
+public final class TranslateUtils {
+
+    public static final Splitter COLON_SPLITTER = Splitter.on(':');
+    public static final int DEFAULT_TIMEOUT_IN_SECONDS = 5;
+
+    private TranslateUtils() {
+    }
+
+    public static <REP extends JVppReply<?>> REP getReplyForWrite(@Nonnull Future<REP> future,
+                                                                  @Nonnull final InstanceIdentifier<?> replyType)
+        throws VppBaseCallException, WriteTimeoutException {
+        return getReplyForWrite(future, replyType, DEFAULT_TIMEOUT_IN_SECONDS);
+    }
+
+    public static <REP extends JVppReply<?>> REP getReplyForWrite(@Nonnull Future<REP> future,
+                                                                  @Nonnull final InstanceIdentifier<?> replyType,
+                                                                  @Nonnegative final int timeoutInSeconds)
+        throws VppBaseCallException, WriteTimeoutException {
+        try {
+            return getReply(future, timeoutInSeconds);
+        } catch (TimeoutException e) {
+            throw new WriteTimeoutException(replyType, e);
+        }
+    }
+
+    public static <REP extends JVppReply<?>> REP getReplyForRead(@Nonnull Future<REP> future,
+                                                                 @Nonnull final InstanceIdentifier<?> replyType)
+        throws VppBaseCallException, ReadTimeoutException {
+        return getReplyForRead(future, replyType, DEFAULT_TIMEOUT_IN_SECONDS);
+    }
+
+    public static <REP extends JVppReply<?>> REP getReplyForRead(@Nonnull Future<REP> future,
+                                                                 @Nonnull final InstanceIdentifier<?> replyType,
+                                                                 @Nonnegative final int timeoutInSeconds)
+        throws VppBaseCallException, ReadTimeoutException {
+        try {
+            return getReply(future, timeoutInSeconds);
+        } catch (TimeoutException e) {
+            throw new ReadTimeoutException(replyType, e);
+        }
+    }
+
+    public static <REP extends JVppReply<?>> REP getReply(@Nonnull Future<REP> future)
+        throws TimeoutException, VppBaseCallException {
+        return getReply(future, DEFAULT_TIMEOUT_IN_SECONDS);
+    }
+
+    public static <REP extends JVppReply<?>> REP getReply(@Nonnull Future<REP> future,
+                                                          @Nonnegative final int timeoutInSeconds)
+        throws TimeoutException, VppBaseCallException {
+        try {
+            checkArgument(timeoutInSeconds > 0, "Timeout cannot be < 0");
+            return future.get(timeoutInSeconds, TimeUnit.SECONDS);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+            throw new IllegalStateException("Interrupted", e);
+        } catch (ExecutionException e) {
+            // Execution exception could generally contains any exception
+            // when using exceptions instead of return codes just rethrow it for processing on corresponding place
+            if (e instanceof ExecutionException && (e.getCause() instanceof VppBaseCallException)) {
+                throw (VppBaseCallException) (e.getCause());
+            }
+            throw new IllegalStateException(e);
+        }
+    }
+
+    /**
+     * Transform Ipv4 address to a byte array acceptable by VPP. VPP expects incoming byte array to be in the same order
+     * as the address.
+     *
+     * @return byte array with address bytes
+     */
+    public static byte[] ipv4AddressNoZoneToArray(final Ipv4AddressNoZone ipv4Addr) {
+        byte[] retval = new byte[4];
+        String[] dots = ipv4Addr.getValue().split("\\.");
+
+        for (int d = 0; d < 4; d++) {
+            retval[d] = (byte) (Short.parseShort(dots[d]) & 0xff);
+        }
+        return retval;
+    }
+
+    /**
+     * Parse byte array returned by VPP representing an Ipv4 address. Vpp returns IP byte arrays in reversed order.
+     *
+     * @return Ipv4AddressNoZone containing string representation of IPv4 address constructed from submitted bytes. No
+     * change in order.
+     */
+    @Nonnull
+    public static Ipv4AddressNoZone arrayToIpv4AddressNoZone(@Nonnull byte[] ip) {
+        // VPP sends ipv4 in a 16 byte array
+        if (ip.length == 16) {
+            ip = Arrays.copyOfRange(ip, 0, 4);
+        }
+        try {
+            // Not reversing the byte array here!! because the IP coming from VPP is in reversed byte order
+            // compared to byte order it was submitted
+            return new Ipv4AddressNoZone(InetAddresses.toAddrString(InetAddresses.fromLittleEndianByteArray(ip)));
+        } catch (UnknownHostException e) {
+            throw new IllegalArgumentException("Unable to parse ipv4", e);
+        }
+    }
+
+    /**
+     * Return (interned) string from byte array while removing \u0000. Strings represented as fixed length byte[] from
+     * vpp contain \u0000.
+     */
+    public static String toString(final byte[] cString) {
+        return new String(cString).replaceAll("\\u0000", "").intern();
+    }
+
+    /**
+     * Parse string represented mac address (using ":" as separator) into a byte array
+     */
+    @Nonnull
+    public static byte[] parseMac(@Nonnull final String macAddress) {
+        final List<String> parts = COLON_SPLITTER.splitToList(macAddress);
+        checkArgument(parts.size() == 6, "Mac address is expected to have 6 parts but was: %s", macAddress);
+        return parseMacLikeString(parts);
+    }
+
+    private static byte[] parseMacLikeString(final List<String> strings) {
+        return strings.stream().limit(6).map(TranslateUtils::parseHexByte).collect(
+            () -> new byte[strings.size()],
+            new BiConsumer<byte[], Byte>() {
+
+                private int i = -1;
+
+                @Override
+                public void accept(final byte[] bytes, final Byte aByte) {
+                    bytes[++i] = aByte;
+                }
+            },
+            (bytes, bytes2) -> {
+                throw new UnsupportedOperationException("Parallel collect not supported");
+            });
+    }
+
+    public static byte parseHexByte(final String aByte) {
+        return (byte) Integer.parseInt(aByte, 16);
+    }
+
+    /**
+     * Returns 0 if argument is null or false, 1 otherwise.
+     *
+     * @param value Boolean value to be converted
+     * @return byte value equal to 0 or 1
+     */
+    public static byte booleanToByte(@Nullable final Boolean value) {
+        return value != null && value
+            ? (byte) 1
+            : (byte) 0;
+    }
+
+    /**
+     * Returns Boolean.TRUE if argument is 0, Boolean.FALSE otherwise.
+     *
+     * @param value byte value to be converted
+     * @return Boolean value
+     * @throws IllegalArgumentException if argument is neither 0 nor 1
+     */
+    @Nonnull
+    public static Boolean byteToBoolean(final byte value) {
+        if (value == 0) {
+            return Boolean.FALSE;
+        } else if (value == 1) {
+            return Boolean.TRUE;
+        }
+        throw new IllegalArgumentException(String.format("0 or 1 was expected but was %d", value));
+    }
+
+    /**
+     * Reverses bytes in the byte array
+     *
+     * @param bytes input array
+     * @return reversed array
+     */
+    public static byte[] reverseBytes(final byte[] bytes) {
+        final byte[] reversed = new byte[bytes.length];
+        int i = 1;
+        for (byte aByte : bytes) {
+            reversed[bytes.length - i++] = aByte;
+        }
+
+        return reversed;
+    }
+}
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/WriteTimeoutException.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/WriteTimeoutException.java
new file mode 100644
index 000000000..9516459b2
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/WriteTimeoutException.java
@@ -0,0 +1,33 @@
+/*
+ * 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.v3po.translate.v3po.util;
+
+import com.google.common.annotations.Beta;
+import io.fd.honeycomb.v3po.translate.write.WriteFailedException;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Thrown when write method invocation times out.
+ */
+@Beta
+public class WriteTimeoutException extends WriteFailedException {
+
+    public WriteTimeoutException(final InstanceIdentifier<?> id, final Throwable cause) {
+        super(id, cause);
+    }
+
+}
diff --git a/vpp-common/vpp-translate-utils/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/vpp/util/rev160406/NamingContextImplModule.java b/vpp-common/vpp-translate-utils/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/vpp/util/rev160406/NamingContextImplModule.java
new file mode 100644
index 000000000..60a816d89
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/vpp/util/rev160406/NamingContextImplModule.java
@@ -0,0 +1,26 @@
+package org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.vpp.util.rev160406;
+
+import io.fd.honeycomb.v3po.translate.v3po.util.NamingContext;
+
+public class NamingContextImplModule extends org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.vpp.util.rev160406.AbstractNamingContextImplModule {
+    public NamingContextImplModule(org.opendaylight.controller.config.api.ModuleIdentifier identifier, org.opendaylight.controller.config.api.DependencyResolver dependencyResolver) {
+        super(identifier, dependencyResolver);
+    }
+
+    public NamingContextImplModule(org.opendaylight.controller.config.api.ModuleIdentifier identifier, org.opendaylight.controller.config.api.DependencyResolver dependencyResolver, org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.vpp.util.rev160406.NamingContextImplModule oldModule, java.lang.AutoCloseable oldInstance) {
+        super(identifier, dependencyResolver, oldModule, oldInstance);
+    }
+
+    @Override
+    public void customValidation() {
+        // add custom validation form module attributes here.
+    }
+
+    @Override
+    public java.lang.AutoCloseable createInstance() {
+        return new NamingContext(
+            getArtificialNamePrefix(),
+            getIdentifier().getInstanceName());
+    }
+
+}
diff --git a/vpp-common/vpp-translate-utils/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/vpp/util/rev160406/NamingContextImplModuleFactory.java b/vpp-common/vpp-translate-utils/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/vpp/util/rev160406/NamingContextImplModuleFactory.java
new file mode 100644
index 000000000..c777dafa1
--- /dev/null
+++ b/vpp-common/vpp-translate-utils/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/vpp/util/rev160406/NamingContextImplModuleFactory.java
@@ -0,0 +1,13 @@
+/*
+* Generated file
+*
+* Generated from: yang module name: vpp-util yang module local name: naming-context-impl
+* Generated by: org.opendaylight.controller.config.yangjmxgenerator.plugin.JMXGenerator
+* Generated at: Mon May 02 10:57:32 CEST 2016
+*
+* Do not modify this file unless it is present under src/main directory
+*/
+package org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.vpp.util.rev160406;
+public class NamingContextImplModuleFactory extends org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.vpp.util.rev160406.AbstractNamingContextImplModuleFactory {
+
+}