Bug 1073: Implemented Transaction chain on InMemoryDOMDataStore level.

[controller.git] / opendaylight / md-sal / sal-dom-broker / src / main / java / org / opendaylight / controller / md / sal / dom / store / impl / SnapshotBackedReadWriteTransaction.java

diff --git a/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/store/impl/SnapshotBackedReadWriteTransaction.java b/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/store/impl/SnapshotBackedReadWriteTransaction.java
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+++ b/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/store/impl/SnapshotBackedReadWriteTransaction.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.controller.md.sal.dom.store.impl;
+
+import org.opendaylight.controller.md.sal.dom.store.impl.tree.DataTreeSnapshot;
+import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
+import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.common.base.Optional;
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.ListenableFuture;
+
+/**
+ * Implementation of Read-Write transaction which is backed by {@link DataTreeSnapshot}
+ * and executed according to {@link TransactionReadyPrototype}.
+ *
+ */
+class SnapshotBackedReadWriteTransaction extends SnapshotBackedWriteTransaction implements
+DOMStoreReadWriteTransaction {
+
+    private static final Logger LOG = LoggerFactory.getLogger(SnapshotBackedReadWriteTransaction.class);
+
+    /**
+     * Creates new read-write transaction.
+     *
+     * @param identifier transaction Identifier
+     * @param snapshot Snapshot which will be modified.
+     * @param readyImpl Implementation of ready method.
+     */
+    protected SnapshotBackedReadWriteTransaction(final Object identifier, final DataTreeSnapshot snapshot,
+            final TransactionReadyPrototype store) {
+        super(identifier, snapshot, store);
+    }
+
+    @Override
+    public ListenableFuture<Optional<NormalizedNode<?, ?>>> read(final InstanceIdentifier path) {
+        LOG.debug("Tx: {} Read: {}", getIdentifier(), path);
+        try {
+            return Futures.immediateFuture(getMutatedView().readNode(path));
+        } catch (Exception e) {
+            LOG.error("Tx: {} Failed Read of {}", getIdentifier(), path, e);
+            throw e;
+        }
+    }
+}
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