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authorMaros Marsalek <mmarsale@cisco.com>2016-04-12 10:13:18 +0200
committerMaros Marsalek <mmarsale@cisco.com>2016-04-12 10:13:18 +0200
commit2b1748599e4c820730eef2deb7f59489bab82f82 (patch)
treef3deb2ee5868397b8beb25bccf3e090d038eeb84 /v3po/translate-api/src/main/java/io
parent87076811fe04f88fbcf67af8935579a4116a932d (diff)
HONEYCOMB-9: Remove references to VPP from translation layer
Change-Id: I281db366a112edc08203e8cb392a212708d4552a Signed-off-by: Maros Marsalek <mmarsale@cisco.com>
Diffstat (limited to 'v3po/translate-api/src/main/java/io')
-rw-r--r--v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/Context.java49
-rw-r--r--v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/SubtreeManager.java39
-rw-r--r--v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/TranslationException.java38
-rw-r--r--v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/VppApiInvocationException.java76
-rw-r--r--v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ChildReader.java50
-rw-r--r--v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ListReader.java47
-rw-r--r--v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ReadContext.java37
-rw-r--r--v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ReadFailedException.java61
-rw-r--r--v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/Reader.java51
-rw-r--r--v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ReaderRegistry.java43
-rw-r--r--v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/write/ChildWriter.java66
-rw-r--r--v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/write/WriteContext.java60
-rw-r--r--v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/write/Writer.java49
-rw-r--r--v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/write/WriterRegistry.java135
14 files changed, 801 insertions, 0 deletions
diff --git a/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/Context.java b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/Context.java
new file mode 100644
index 000000000..b60963678
--- /dev/null
+++ b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/Context.java
@@ -0,0 +1,49 @@
+/*
+ * 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;
+
+import com.google.common.collect.Maps;
+import java.util.HashMap;
+
+/**
+ * Simple context class that provides transient storage during one or more read/write operations
+ */
+public class Context implements AutoCloseable {
+
+ protected final HashMap<Object, Object> map;
+
+ public Context() {
+ map = Maps.newHashMap();
+ }
+
+ public Object get(final Object o) {
+ return map.get(o);
+ }
+
+ public boolean containsKey(final Object o) {
+ return map.containsKey(o);
+ }
+
+ public Object put(final Object o, final Object o2) {
+ return map.put(o, o2);
+ }
+
+ @Override
+ public void close() {
+ map.clear();
+ }
+}
diff --git a/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/SubtreeManager.java b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/SubtreeManager.java
new file mode 100644
index 000000000..39e403642
--- /dev/null
+++ b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/SubtreeManager.java
@@ -0,0 +1,39 @@
+/*
+ * 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;
+
+import com.google.common.annotations.Beta;
+import javax.annotation.Nonnull;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Base identifiable subtree manager(reader, writer etc.)
+ *
+ * @param <D> Specific DataObject derived type, that is managed by this manager
+ */
+@Beta
+public interface SubtreeManager<D extends DataObject> {
+
+ /**
+ * Gets the type of node managed by this reader
+ *
+ * @return Class object for node managed by this reader
+ */
+ @Nonnull
+ InstanceIdentifier<D> getManagedDataObjectType();
+}
diff --git a/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/TranslationException.java b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/TranslationException.java
new file mode 100644
index 000000000..ee0049977
--- /dev/null
+++ b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/TranslationException.java
@@ -0,0 +1,38 @@
+/*
+ * 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;
+
+import com.google.common.annotations.Beta;
+
+/**
+ * Base exception for the translation layer
+ */
+@Beta
+public class TranslationException extends Exception {
+
+ public TranslationException(final String s) {
+ super(s);
+ }
+
+ public TranslationException(final String s, final Throwable cause) {
+ super(s, cause);
+ }
+
+ public TranslationException(final Throwable cause) {
+ super(cause);
+ }
+}
diff --git a/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/VppApiInvocationException.java b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/VppApiInvocationException.java
new file mode 100644
index 000000000..298c698f7
--- /dev/null
+++ b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/VppApiInvocationException.java
@@ -0,0 +1,76 @@
+/*
+ * 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;
+
+import com.google.common.annotations.Beta;
+import com.google.common.base.Preconditions;
+import javax.annotation.Nonnull;
+
+/**
+ * Thrown when Vpp jAPI method invocation failed.
+ */
+@Beta
+public class VppApiInvocationException extends TranslationException {
+ private final String methodName;
+ private final int ctxId;
+ private final int errorCode;
+
+ /**
+ * Constructs an VppApiInvocationFailedException with the specified api method name and error code.
+ *
+ * @param methodName method name that failed to invoke
+ * @param ctxId api request context identifier
+ * @param errorCode negative error code value associated with this failure
+ * @throws NullPointerException if apiMethodName is null
+ * @throws IllegalArgumentException if errorCode is nonnegative
+ */
+ public VppApiInvocationException(@Nonnull final String methodName, final int ctxId, final int errorCode) {
+ super(String.format("vppApi.%s failed with error code: %d (ctxId=%d) ", methodName, errorCode, ctxId));
+ this.methodName = Preconditions.checkNotNull(methodName, "apiMethodName is null!");
+ this.ctxId = ctxId;
+ Preconditions.checkArgument(errorCode < 0);
+ this.errorCode = errorCode;
+ }
+
+ /**
+ * Returns method name that failed to invoke.
+ *
+ * @return method name
+ */
+ public String getMethodName() {
+ return methodName;
+ }
+
+ /**
+ * Returns api request context identifier.
+ *
+ * @return value of context identifier
+ */
+ public int getCtxId() {
+ return ctxId;
+ }
+
+ /**
+ * Returns the error code associated with this failure.
+ *
+ * @return a negative integer error code
+ */
+ public int getErrorCode() {
+ return errorCode;
+ }
+}
+
diff --git a/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ChildReader.java b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ChildReader.java
new file mode 100644
index 000000000..02b6b8d26
--- /dev/null
+++ b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ChildReader.java
@@ -0,0 +1,50 @@
+/*
+ * 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.read;
+
+import com.google.common.annotations.Beta;
+import javax.annotation.Nonnull;
+import org.opendaylight.yangtools.concepts.Builder;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Child reader allowing its parent to pass the builder object
+ *
+ * @param <C> Specific DataObject derived type, that is handled by this reader
+ */
+@Beta
+public interface ChildReader<C extends DataObject> extends Reader<C> {
+
+ /**
+ * Reads subtree starting from node managed by this reader and place the subtree within parent builder object if the
+ * data exists.
+ *
+ * @param id Unique identifier pointing to the node managed by this reader. Useful when necessary to
+ * determine the exact position within more complex subtrees.
+ * @param parentBuilder Builder of parent DataObject. Objects read on this level (if any) must be placed into the
+ * parent builder.
+ * @param ctx Read context
+ *
+ * @throws ReadFailedException if read was unsuccessful
+ */
+ void read(@Nonnull final InstanceIdentifier<? extends DataObject> id,
+ @Nonnull final Builder<? extends DataObject> parentBuilder,
+ @Nonnull final ReadContext ctx) throws ReadFailedException;
+
+}
+
diff --git a/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ListReader.java b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ListReader.java
new file mode 100644
index 000000000..faf6f0a19
--- /dev/null
+++ b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ListReader.java
@@ -0,0 +1,47 @@
+/*
+ * 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.read;
+
+import com.google.common.annotations.Beta;
+import java.util.List;
+import javax.annotation.Nonnull;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.Identifiable;
+import org.opendaylight.yangtools.yang.binding.Identifier;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * List reader, allowing read of all the elements
+ *
+ * @param <D> Specific DataObject derived type, that is handled by this reader
+ */
+@Beta
+public interface ListReader<D extends DataObject & Identifiable<K>, K extends Identifier<D>> extends Reader<D> {
+
+ /**
+ * Read all elements in this list
+ *
+ * @param id Wildcarded identifier of list managed by this reader
+ * @param ctx Read context
+ *
+ * @return List of all entries in this list
+ * @throws ReadFailedException if read was unsuccessful
+ */
+ @Nonnull
+ List<D> readList(@Nonnull final InstanceIdentifier<D> id,
+ @Nonnull final ReadContext ctx) throws ReadFailedException;
+}
diff --git a/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ReadContext.java b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ReadContext.java
new file mode 100644
index 000000000..6b1473548
--- /dev/null
+++ b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ReadContext.java
@@ -0,0 +1,37 @@
+/*
+ * 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.read;
+
+import io.fd.honeycomb.v3po.translate.Context;
+import javax.annotation.Nonnull;
+
+/**
+ * Read Context
+ */
+public interface ReadContext extends AutoCloseable {
+
+ /**
+ * Get key value storage for customizers
+ *
+ * @return Context for customizers
+ */
+ @Nonnull
+ Context getContext();
+
+ @Override
+ void close();
+}
diff --git a/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ReadFailedException.java b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ReadFailedException.java
new file mode 100644
index 000000000..51d4fcb5a
--- /dev/null
+++ b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ReadFailedException.java
@@ -0,0 +1,61 @@
+/*
+ * 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.read;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import io.fd.honeycomb.v3po.translate.TranslationException;
+import javax.annotation.Nonnull;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Thrown when a reader or customizer is not able to read data for the given id.
+ */
+public class ReadFailedException extends TranslationException {
+
+ private final InstanceIdentifier<?> failedId;
+
+ /**
+ * Constructs an ReadFailedException given data id and exception cause.
+ *
+ * @param failedId instance identifier of the data object that could not be read
+ * @param cause the cause of read failure
+ */
+ public ReadFailedException(@Nonnull final InstanceIdentifier<?> failedId, final Throwable cause) {
+ super("Failed to read " + failedId, cause);
+ this.failedId = checkNotNull(failedId, "failedId should not be null");
+ }
+
+ /**
+ * Constructs an ReadFailedException given data id.
+ *
+ * @param failedId instance identifier of the data object that could not be read
+ */
+ public ReadFailedException(@Nonnull final InstanceIdentifier<?> failedId) {
+ this(failedId, null);
+ }
+
+ /**
+ * Returns id of the data object that could not be read.
+ *
+ * @return data object instance identifier
+ */
+ @Nonnull
+ public InstanceIdentifier<?> getFailedId() {
+ return failedId;
+ }
+}
diff --git a/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/Reader.java b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/Reader.java
new file mode 100644
index 000000000..122263cb3
--- /dev/null
+++ b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/Reader.java
@@ -0,0 +1,51 @@
+/*
+ * 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.read;
+
+import com.google.common.annotations.Beta;
+import com.google.common.base.Optional;
+import io.fd.honeycomb.v3po.translate.SubtreeManager;
+import javax.annotation.Nonnull;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Base reader, responsible for translation between DataObjects and any other side
+ *
+ * @param <D> Specific DataObject derived type, that is handled by this reader
+ */
+@Beta
+public interface Reader<D extends DataObject> extends SubtreeManager<D> {
+
+ // TODO make async
+
+ /**
+ * Reads data identified by id
+ *
+ * @param id unique identifier of subtree to be read. The subtree must contain managed data object type. For
+ * identifiers pointing below node managed by this reader, it's reader's responsibility to filter out the
+ * right node or to delegate the read to a child reader.
+ * @param ctx Read context
+ *
+ * @return List of DataObjects identified by id. If the ID points to a single node, it will be wrapped in a list
+ * @throws ReadFailedException if read was unsuccessful
+ */
+ @Nonnull
+ Optional<? extends DataObject> read(@Nonnull final InstanceIdentifier<? extends DataObject> id,
+ @Nonnull ReadContext ctx) throws ReadFailedException;
+
+}
diff --git a/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ReaderRegistry.java b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ReaderRegistry.java
new file mode 100644
index 000000000..f34455a27
--- /dev/null
+++ b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/read/ReaderRegistry.java
@@ -0,0 +1,43 @@
+/*
+ * 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.read;
+
+import com.google.common.annotations.Beta;
+import com.google.common.collect.Multimap;
+import javax.annotation.Nonnull;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Simple delegating reader suitable as a holder for all other root readers, providing readAll feature.
+ */
+@Beta
+public interface ReaderRegistry extends Reader<DataObject> {
+
+ /**
+ * Performs read on all registered root readers and merges the results into a Multimap. Keys represent identifiers
+ * for root DataObjects from the data tree modeled by YANG.
+ *
+ * @param ctx Read context
+ *
+ * @return multimap that preserves deterministic iteration order across non-distinct key values
+ * @throws ReadFailedException if read was unsuccessful
+ */
+ @Nonnull
+ Multimap<InstanceIdentifier<? extends DataObject>, ? extends DataObject> readAll(@Nonnull final ReadContext ctx)
+ throws ReadFailedException;
+}
diff --git a/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/write/ChildWriter.java b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/write/ChildWriter.java
new file mode 100644
index 000000000..f933cfd4a
--- /dev/null
+++ b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/write/ChildWriter.java
@@ -0,0 +1,66 @@
+/*
+ * 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.write;
+
+import com.google.common.annotations.Beta;
+import javax.annotation.Nonnull;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Child writer allowing its parent to pass the builder object
+ *
+ * @param <D> Specific DataObject derived type, that is handled by this writer
+ */
+@Beta
+public interface ChildWriter<D extends DataObject> extends Writer<D> {
+
+ /**
+ * Extract data object managed by this writer from parent data and perform write.
+ *
+ * @param parentId Id of parent node
+ * @param parentDataAfter Parent data from modification to extract data object from
+ * @param ctx Write context for current modification
+ */
+ void writeChild(@Nonnull final InstanceIdentifier<? extends DataObject> parentId,
+ @Nonnull final DataObject parentDataAfter,
+ @Nonnull final WriteContext ctx);
+
+ /**
+ * Extract data object managed by this writer(if necessary) from parent data and perform delete.
+ *
+ * @param parentId Id of parent node
+ * @param parentDataBefore Parent data before modification to extract data object from
+ * @param ctx Write context for current modification
+ */
+ void deleteChild(@Nonnull final InstanceIdentifier<? extends DataObject> parentId,
+ @Nonnull final DataObject parentDataBefore,
+ @Nonnull final WriteContext ctx);
+
+ /**
+ * Extract data object managed by this writer(if necessary) from parent data and perform delete.
+ *
+ * @param parentId Id of parent node
+ * @param parentDataBefore Parent data before modification to extract data object from
+ * @param parentDataAfter Parent data from modification to extract data object from
+ * @param ctx Write context for current modification
+ */
+ void updateChild(@Nonnull final InstanceIdentifier<? extends DataObject> parentId,
+ @Nonnull final DataObject parentDataBefore,
+ @Nonnull final DataObject parentDataAfter,
+ @Nonnull final WriteContext ctx);
+}
diff --git a/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/write/WriteContext.java b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/write/WriteContext.java
new file mode 100644
index 000000000..bb0b33145
--- /dev/null
+++ b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/write/WriteContext.java
@@ -0,0 +1,60 @@
+/*
+ * 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.write;
+
+import com.google.common.annotations.Beta;
+import com.google.common.base.Optional;
+import io.fd.honeycomb.v3po.translate.Context;
+import javax.annotation.Nonnull;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Context providing information about current state of DataTree to writers
+ */
+@Beta
+public interface WriteContext extends AutoCloseable {
+
+ /**
+ * Read any data object before current modification was applied
+ *
+ * @param currentId Id of an object to read
+ *
+ * @return Data before the modification was applied
+ */
+ Optional<DataObject> readBefore(@Nonnull final InstanceIdentifier<? extends DataObject> currentId);
+
+ /**
+ * Read any data object from current modification
+ *
+ * @param currentId Id of an object to read
+ *
+ * @return Data from the modification
+ */
+ Optional<DataObject> readAfter(@Nonnull final InstanceIdentifier<? extends DataObject> currentId);
+
+ /**
+ * Get key value storage for customizers
+ *
+ * @return Context for customizers
+ */
+ @Nonnull
+ Context getContext();
+
+ @Override
+ void close();
+}
diff --git a/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/write/Writer.java b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/write/Writer.java
new file mode 100644
index 000000000..08465fdd7
--- /dev/null
+++ b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/write/Writer.java
@@ -0,0 +1,49 @@
+/*
+ * 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.write;
+
+import com.google.common.annotations.Beta;
+import io.fd.honeycomb.v3po.translate.TranslationException;
+import io.fd.honeycomb.v3po.translate.SubtreeManager;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Base writer, responsible for translation between DataObjects and any other side. Handling all update operations(create,
+ * update, delete)
+ *
+ * @param <D> Specific DataObject derived type, that is handled by this writer
+ */
+@Beta
+public interface Writer<D extends DataObject> extends SubtreeManager<D> {
+
+ /**
+ * Handle update operation. U from CRUD.
+ *
+ * @param id Identifier(from root) of data being written
+ * @param dataBefore Old data
+ * @param dataAfter New, updated data
+ * @param ctx Write context enabling writer to get information about candidate data as well as current data
+ * @throws TranslationException if update failed
+ */
+ void update(@Nonnull final InstanceIdentifier<? extends DataObject> id,
+ @Nullable final DataObject dataBefore,
+ @Nullable final DataObject dataAfter,
+ @Nonnull final WriteContext ctx) throws TranslationException;
+}
diff --git a/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/write/WriterRegistry.java b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/write/WriterRegistry.java
new file mode 100644
index 000000000..c5a8116c8
--- /dev/null
+++ b/v3po/translate-api/src/main/java/io/fd/honeycomb/v3po/translate/write/WriterRegistry.java
@@ -0,0 +1,135 @@
+/*
+ * 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.write;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import com.google.common.annotations.Beta;
+import com.google.common.collect.ImmutableList;
+import io.fd.honeycomb.v3po.translate.TranslationException;
+import java.util.List;
+import java.util.Map;
+import javax.annotation.Nonnull;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Special {@link Writer} capable of performing bulk updates
+ */
+@Beta
+public interface WriterRegistry extends Writer<DataObject> {
+
+ /**
+ * Performs bulk update
+ *
+ * @throws BulkUpdateException in case bulk update fails
+ * @throws TranslationException in case some other error occurs while processing update request
+ */
+ void update(@Nonnull final Map<InstanceIdentifier<?>, DataObject> dataBefore,
+ @Nonnull final Map<InstanceIdentifier<?>, DataObject> dataAfter,
+ @Nonnull final WriteContext ctx) throws TranslationException;
+
+ /**
+ * Thrown when bulk update failed.
+ */
+ @Beta
+ class BulkUpdateException extends TranslationException {
+
+ private final Reverter reverter;
+ private final InstanceIdentifier<?> failedId; // TODO change to VppDataModification
+
+ /**
+ * Constructs an BulkUpdateException.
+ *
+ * @param failedId instance identifier of the data object that caused bulk update to fail.
+ * @param cause the cause of bulk update failure
+ */
+ public BulkUpdateException(@Nonnull final InstanceIdentifier<?> failedId, @Nonnull final Reverter reverter,
+ final Throwable cause) {
+ super("Bulk update failed at " + failedId, cause);
+ this.failedId = checkNotNull(failedId, "failedId should not be null");
+ this.reverter = checkNotNull(reverter, "reverter should not be null");
+ }
+
+ /**
+ * Reverts changes that were successfully applied during bulk update before failure occurred.
+ *
+ * @throws Reverter.RevertFailedException if revert fails
+ */
+ public void revertChanges() throws Reverter.RevertFailedException {
+ reverter.revert();
+ }
+
+ /**
+ * Returns instance identifier of the data object that caused bulk update to fail.
+ *
+ * @return data object's instance identifier
+ */
+ @Nonnull
+ public InstanceIdentifier<?> getFailedId() {
+ return failedId;
+ }
+ }
+
+ /**
+ * Abstraction over revert mechanism in cast of a bulk update failure
+ */
+ @Beta
+ interface Reverter {
+
+ /**
+ * Reverts changes that were successfully applied during bulk update before failure occurred. Changes are
+ * reverted in reverse order they were applied.
+ *
+ * @throws RevertFailedException if not all of applied changes were successfully reverted
+ */
+ void revert() throws RevertFailedException;
+
+ /**
+ * Thrown when some of the changes applied during bulk update were not reverted.
+ */
+ @Beta
+ class RevertFailedException extends TranslationException {
+
+ // TODO change to list of VppDataModifications to make debugging easier
+ private final List<InstanceIdentifier<?>> notRevertedChanges;
+
+ /**
+ * Constructs an RevertFailedException with the list of changes that were not reverted.
+ *
+ * @param notRevertedChanges list of changes that were not reverted
+ * @param cause the cause of revert failure
+ */
+ public RevertFailedException(@Nonnull final List<InstanceIdentifier<?>> notRevertedChanges,
+ final Throwable cause) {
+ super(cause);
+ checkNotNull(notRevertedChanges, "notRevertedChanges should not be null");
+ this.notRevertedChanges = ImmutableList.copyOf(notRevertedChanges);
+ }
+
+ /**
+ * Returns the list of changes that were not reverted.
+ *
+ * @return list of changes that were not reverted
+ */
+ @Nonnull
+ public List<InstanceIdentifier<?>> getNotRevertedChanges() {
+ return notRevertedChanges;
+ }
+ }
+ }
+} \ No newline at end of file