HONEYCOMB-61: Add BA broker for context data tree

With broker, context data can be accessed in a transactional
manner, same as config data

+ Renamed data-api concepts to not include DataTree
+ Renamed context related concepts to better distinguish between them
+ Now passing full ReadContext to read customizers
+ Naming context is backed by context data broker

Change-Id: I0b2876dd74a31a9ced7d9b5145672868e12f8b82
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/v3po/data-api/src/main/java/io/fd/honeycomb/v3po/data/ReadableDataManager.java b/v3po/data-api/src/main/java/io/fd/honeycomb/v3po/data/ReadableDataManager.java
new file mode 100644
index 000000000..0e98c0903
--- /dev/null
+++ b/v3po/data-api/src/main/java/io/fd/honeycomb/v3po/data/ReadableDataManager.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.v3po.data;
+
+import com.google.common.annotations.Beta;
+import com.google.common.base.Optional;
+import com.google.common.util.concurrent.CheckedFuture;
+import javax.annotation.Nonnull;
+import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+
+/**
+ * Facade over data tree that allows reading tree nodes.
+ */
+@Beta
+public interface ReadableDataManager {
+
+    /**
+     * Reads a particular node from the data tree.
+     *
+     * @param path Path of the node
+     * @return a CheckFuture containing the result of the read.
+     */
+    CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> read(@Nonnull final YangInstanceIdentifier path);
+}