Refactor transaction support in preparation for migration to latest APIs
 - Added a explicit transaction id type
 - cli command now just returns the identifiers of in-progress transactions
 - Removed redriveTransactions until a better alternative is provided
 - Removed DatabaseUpdate and replaced its usage with MapUpdate

Change-Id: Ic4a14967072068834510cd8459fd2a6790e456ef
diff --git a/core/store/primitives/src/test/java/org/onosproject/store/primitives/impl/DefaultAsyncConsistentMapTest.java b/core/store/primitives/src/test/java/org/onosproject/store/primitives/impl/DefaultAsyncConsistentMapTest.java
index a630d1a..68e7ecb 100644
--- a/core/store/primitives/src/test/java/org/onosproject/store/primitives/impl/DefaultAsyncConsistentMapTest.java
+++ b/core/store/primitives/src/test/java/org/onosproject/store/primitives/impl/DefaultAsyncConsistentMapTest.java
@@ -41,7 +41,6 @@
 import org.onosproject.core.ApplicationId;
 import org.onosproject.core.DefaultApplicationId;
 import org.onosproject.store.service.Serializer;
-import org.onosproject.store.service.Transaction;
 import org.onosproject.store.service.Versioned;
 
 import com.google.common.base.MoreObjects;
diff --git a/core/store/primitives/src/test/java/org/onosproject/store/primitives/resources/impl/AtomixConsistentMapTest.java b/core/store/primitives/src/test/java/org/onosproject/store/primitives/resources/impl/AtomixConsistentMapTest.java
index 5711a88..21d8edc 100644
--- a/core/store/primitives/src/test/java/org/onosproject/store/primitives/resources/impl/AtomixConsistentMapTest.java
+++ b/core/store/primitives/src/test/java/org/onosproject/store/primitives/resources/impl/AtomixConsistentMapTest.java
@@ -27,6 +27,8 @@
 import org.junit.Ignore;
 import org.junit.Test;
 import org.onlab.util.Tools;
+import org.onosproject.store.primitives.TransactionId;
+import org.onosproject.store.primitives.impl.Transaction;
 import org.onosproject.store.service.MapEvent;
 import org.onosproject.store.service.MapEventListener;
 import org.onosproject.store.service.Versioned;
@@ -351,10 +353,9 @@
                 .withValue(value1)
                 .build();
 
-        TransactionalMapUpdate<String, byte[]> txMapUpdate =
-                new TransactionalMapUpdate<>(TransactionId.from("tx1"), Arrays.asList(update1));
+        Transaction tx = new Transaction(TransactionId.from("tx1"), Arrays.asList(update1));
 
-        map.prepare(txMapUpdate).thenAccept(result -> {
+        map.prepare(tx).thenAccept(result -> {
             assertEquals(PrepareResult.OK, result);
         }).join();
         assertNull(listener.event());
@@ -376,7 +377,7 @@
 
         assertNull(listener.event());
 
-        map.commit(txMapUpdate.transactionId()).join();
+        map.commit(tx.id()).join();
         assertNotNull(listener.event());
         assertEquals(MapEvent.Type.INSERT, listener.event().type());
         assertTrue(Arrays.equals(value1, listener.event().newValue().value()));
@@ -406,14 +407,13 @@
                 .withKey("foo")
                 .withValue(value1)
                 .build();
-        TransactionalMapUpdate<String, byte[]> txMapUpdate =
-                new TransactionalMapUpdate<>(TransactionId.from("tx1"), Arrays.asList(update1));
-        map.prepare(txMapUpdate).thenAccept(result -> {
+        Transaction tx = new Transaction(TransactionId.from("tx1"), Arrays.asList(update1));
+        map.prepare(tx).thenAccept(result -> {
             assertEquals(PrepareResult.OK, result);
         }).join();
         assertNull(listener.event());
 
-        map.rollback(txMapUpdate.transactionId()).join();
+        map.rollback(tx.id()).join();
         assertNull(listener.event());
 
         map.get("foo").thenAccept(result -> {
diff --git a/core/store/primitives/src/test/java/org/onosproject/store/primitives/resources/impl/MapUpdateTest.java b/core/store/primitives/src/test/java/org/onosproject/store/primitives/resources/impl/MapUpdateTest.java
new file mode 100644
index 0000000..6a0db93
--- /dev/null
+++ b/core/store/primitives/src/test/java/org/onosproject/store/primitives/resources/impl/MapUpdateTest.java
@@ -0,0 +1,126 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * 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 org.onosproject.store.primitives.resources.impl;
+
+import com.google.common.testing.EqualsTester;
+import org.junit.Test;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+
+/**
+ * Unit Tests for MapUpdate class.
+ */
+
+public class MapUpdateTest {
+
+    private final MapUpdate<String, byte[]> stats1 = MapUpdate.<String, byte[]>newBuilder()
+            .withCurrentValue("1".getBytes())
+            .withValue("2".getBytes())
+            .withCurrentVersion(3)
+            .withKey("4")
+            .withMapName("5")
+            .withType(MapUpdate.Type.PUT)
+            .build();
+
+    private final MapUpdate<String, byte[]> stats2 = MapUpdate.<String, byte[]>newBuilder()
+            .withCurrentValue("1".getBytes())
+            .withValue("2".getBytes())
+            .withCurrentVersion(3)
+            .withKey("4")
+            .withMapName("5")
+            .withType(MapUpdate.Type.REMOVE)
+            .build();
+
+    private final MapUpdate<String, byte[]> stats3 = MapUpdate.<String, byte[]>newBuilder()
+            .withCurrentValue("1".getBytes())
+            .withValue("2".getBytes())
+            .withCurrentVersion(3)
+            .withKey("4")
+            .withMapName("5")
+            .withType(MapUpdate.Type.REMOVE_IF_VALUE_MATCH)
+            .build();
+
+    private final MapUpdate<String, byte[]> stats4 = MapUpdate.<String, byte[]>newBuilder()
+            .withCurrentValue("1".getBytes())
+            .withValue("2".getBytes())
+            .withCurrentVersion(3)
+            .withKey("4")
+            .withMapName("5")
+            .withType(MapUpdate.Type.REMOVE_IF_VERSION_MATCH)
+            .build();
+
+    private final MapUpdate<String, byte[]> stats5 = MapUpdate.<String, byte[]>newBuilder()
+            .withCurrentValue("1".getBytes())
+            .withValue("2".getBytes())
+            .withCurrentVersion(3)
+            .withKey("4")
+            .withMapName("5")
+            .withType(MapUpdate.Type.PUT_IF_VALUE_MATCH)
+            .build();
+
+    private final MapUpdate<String, byte[]> stats6 = MapUpdate.<String, byte[]>newBuilder()
+            .withCurrentValue("1".getBytes())
+            .withValue("2".getBytes())
+            .withCurrentVersion(3)
+            .withKey("4")
+            .withMapName("5")
+            .withType(MapUpdate.Type.PUT_IF_VERSION_MATCH)
+            .build();
+
+    /**
+     *  Tests the constructor for the class.
+     */
+    @Test
+    public void testConstruction() {
+        assertThat(stats1.currentValue(), is("1".getBytes()));
+        assertThat(stats1.value(), is("2".getBytes()));
+        assertThat(stats1.currentVersion(), is(3L));
+        assertThat(stats1.key(), is("4"));
+        assertThat(stats1.mapName(), is("5"));
+        assertThat(stats1.type(), is(MapUpdate.Type.PUT));
+    }
+
+    /**
+     * Tests the equals, hashCode and toString methods using Guava EqualsTester.
+     */
+    @Test
+    public void testEquals() {
+        new EqualsTester()
+                .addEqualityGroup(stats1, stats1)
+                .addEqualityGroup(stats2)
+                .testEquals();
+
+        new EqualsTester()
+                .addEqualityGroup(stats3, stats3)
+                .addEqualityGroup(stats4)
+                .testEquals();
+
+        new EqualsTester()
+                .addEqualityGroup(stats5, stats5)
+                .addEqualityGroup(stats6)
+                .testEquals();
+    }
+
+    /**
+     * Tests if the toString method returns a consistent value for hashing.
+     */
+    @Test
+    public void testToString() {
+        assertThat(stats1.toString(), is(stats1.toString()));
+    }
+
+}