Inserting Objects in *.ServiceImpl.java
By default liferay provides some objects injected. 1. counterLocalService 2. userLocalService userService userPersistance 3. resourceLocalService resourceService resourcePersistance and etc.... So we inject other services by using reference tag in service.xml <reference package-path="com.liferay.portlet.asset" entity="AssetEntry" /> Here we are inserting assetEntryLocalService