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diff --git a/src/com/android/messaging/datamodel/DataModel.java b/src/com/android/messaging/datamodel/DataModel.java
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+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * 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 com.android.messaging.datamodel;
+
+import android.content.Context;
+import android.database.sqlite.SQLiteDatabase;
+import android.net.Uri;
+import android.text.TextUtils;
+
+import com.android.messaging.Factory;
+import com.android.messaging.datamodel.action.Action;
+import com.android.messaging.datamodel.action.ActionService;
+import com.android.messaging.datamodel.action.BackgroundWorker;
+import com.android.messaging.datamodel.data.BlockedParticipantsData;
+import com.android.messaging.datamodel.data.BlockedParticipantsData.BlockedParticipantsDataListener;
+import com.android.messaging.datamodel.data.ContactListItemData;
+import com.android.messaging.datamodel.data.ContactPickerData;
+import com.android.messaging.datamodel.data.ContactPickerData.ContactPickerDataListener;
+import com.android.messaging.datamodel.data.ConversationData;
+import com.android.messaging.datamodel.data.ConversationData.ConversationDataListener;
+import com.android.messaging.datamodel.data.ConversationListData;
+import com.android.messaging.datamodel.data.ConversationListData.ConversationListDataListener;
+import com.android.messaging.datamodel.data.DraftMessageData;
+import com.android.messaging.datamodel.data.GalleryGridItemData;
+import com.android.messaging.datamodel.data.LaunchConversationData;
+import com.android.messaging.datamodel.data.LaunchConversationData.LaunchConversationDataListener;
+import com.android.messaging.datamodel.data.MediaPickerData;
+import com.android.messaging.datamodel.data.MessagePartData;
+import com.android.messaging.datamodel.data.ParticipantData;
+import com.android.messaging.datamodel.data.ParticipantListItemData;
+import com.android.messaging.datamodel.data.PeopleAndOptionsData;
+import com.android.messaging.datamodel.data.PeopleAndOptionsData.PeopleAndOptionsDataListener;
+import com.android.messaging.datamodel.data.PeopleOptionsItemData;
+import com.android.messaging.datamodel.data.SettingsData;
+import com.android.messaging.datamodel.data.SettingsData.SettingsDataListener;
+import com.android.messaging.datamodel.data.SubscriptionListData;
+import com.android.messaging.datamodel.data.VCardContactItemData;
+import com.android.messaging.util.Assert.DoesNotRunOnMainThread;
+import com.android.messaging.util.ConnectivityUtil;
+
+public abstract class DataModel {
+    private String mFocusedConversation;
+    private boolean mConversationListScrolledToNewestConversation;
+
+    public static DataModel get() {
+        return Factory.get().getDataModel();
+    }
+
+    public static final void startActionService(final Action action) {
+        get().getActionService().startAction(action);
+    }
+
+    public static final void scheduleAction(final Action action,
+            final int code, final long delayMs) {
+        get().getActionService().scheduleAction(action, code, delayMs);
+    }
+
+    public abstract ConversationListData createConversationListData(final Context context,
+            final ConversationListDataListener listener, final boolean archivedMode);
+
+    public abstract ConversationData createConversationData(final Context context,
+            final ConversationDataListener listener, final String conversationId);
+
+    public abstract ContactListItemData createContactListItemData();
+
+    public abstract ContactPickerData createContactPickerData(final Context context,
+            final ContactPickerDataListener listener);
+
+    public abstract MediaPickerData createMediaPickerData(final Context context);
+
+    public abstract GalleryGridItemData createGalleryGridItemData();
+
+    public abstract LaunchConversationData createLaunchConversationData(
+            LaunchConversationDataListener listener);
+
+    public abstract PeopleOptionsItemData createPeopleOptionsItemData(final Context context);
+
+    public abstract PeopleAndOptionsData createPeopleAndOptionsData(final String conversationId,
+            final Context context, final PeopleAndOptionsDataListener listener);
+
+    public abstract VCardContactItemData createVCardContactItemData(final Context context,
+            final MessagePartData data);
+
+    public abstract VCardContactItemData createVCardContactItemData(final Context context,
+            final Uri vCardUri);
+
+    public abstract ParticipantListItemData createParticipantListItemData(
+            final ParticipantData participant);
+
+    public abstract BlockedParticipantsData createBlockedParticipantsData(Context context,
+            BlockedParticipantsDataListener listener);
+
+    public abstract SubscriptionListData createSubscriptonListData(Context context);
+
+    public abstract SettingsData createSettingsData(Context context, SettingsDataListener listener);
+
+    public abstract DraftMessageData createDraftMessageData(String conversationId);
+
+    public abstract ActionService getActionService();
+
+    public abstract BackgroundWorker getBackgroundWorkerForActionService();
+
+    @DoesNotRunOnMainThread
+    public abstract DatabaseWrapper getDatabase();
+
+    // Allow DataModel to coordinate with activity lifetime events.
+    public abstract void onActivityResume();
+
+    abstract void onCreateTables(final SQLiteDatabase db);
+
+    public void setFocusedConversation(final String conversationId) {
+        mFocusedConversation = conversationId;
+    }
+
+    public boolean isFocusedConversation(final String conversationId) {
+        return !TextUtils.isEmpty(mFocusedConversation)
+                && TextUtils.equals(mFocusedConversation, conversationId);
+    }
+
+    public void setConversationListScrolledToNewestConversation(
+            final boolean scrolledToNewestConversation) {
+        mConversationListScrolledToNewestConversation = scrolledToNewestConversation;
+    }
+
+    public boolean isConversationListScrolledToNewestConversation() {
+        return mConversationListScrolledToNewestConversation;
+    }
+
+    /**
+     * If a new message is received in the specified conversation, will the user be able to
+     * observe it in some UI within the app?
+     * @param conversationId conversation with the new incoming message
+     */
+    public boolean isNewMessageObservable(final String conversationId) {
+        return isConversationListScrolledToNewestConversation()
+                || isFocusedConversation(conversationId);
+    }
+
+    public abstract void onApplicationCreated();
+
+    public abstract ConnectivityUtil getConnectivityUtil();
+
+    public abstract SyncManager getSyncManager();
+}