Introducing the Modification classses

[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / modification / CompositeModification.java

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/modification/CompositeModification.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/modification/CompositeModification.java
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+/*
+ * 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.cluster.datastore.modification;
+
+import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * CompositeModification contains a list of modifications that need to be applied to the DOMStore
+ * <p>
+ * A CompositeModification gets stored in the transaction log for a Shard. During recovery when the transaction log
+ * is being replayed a DOMStoreWriteTransaction could be created and a CompositeModification could be applied to it.
+ * </p>
+ */
+public class CompositeModification implements Modification {
+  private final List<Modification> modifications = new ArrayList<>();
+
+  @Override
+  public void apply(DOMStoreWriteTransaction transaction) {
+    for(Modification modification : modifications){
+      modification.apply(transaction);
+    }
+  }
+
+  public void addModification(Modification modification){
+    modifications.add(modification);
+  }
+}