Java tutorial
/** * Copyright 2000-present Liferay, Inc. * * 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 blade.portlet.actioncommand; import com.liferay.portal.kernel.log.Log; import com.liferay.portal.kernel.log.LogFactoryUtil; import com.liferay.portal.kernel.portlet.bridges.mvc.MVCActionCommand; import com.liferay.portal.kernel.servlet.SessionMessages; import com.liferay.portal.kernel.util.ParamUtil; import com.liferay.portal.kernel.util.StringPool; import javax.portlet.ActionRequest; import javax.portlet.ActionResponse; import javax.portlet.PortletException; import org.osgi.service.component.annotations.Component; @Component(immediate = true, property = { "mvc.command.name=greet", "javax.portlet.name=blade_portlet_GreeterPortlet" }, service = MVCActionCommand.class) public class GreeterActionCommand implements MVCActionCommand { @Override public boolean processAction(ActionRequest actionRequest, ActionResponse actionResponse) throws PortletException { _handleActionCommand(actionRequest, actionResponse); return true; } private void _handleActionCommand(ActionRequest actionRequest, ActionResponse actionResponse) { String name = ParamUtil.get(actionRequest, "name", StringPool.BLANK); _log.info("Hello " + name); String greetingMessage = "Hello " + name + "! Welcome to OSGi"; actionRequest.setAttribute("GREETER_MESSAGE", greetingMessage); SessionMessages.add(actionRequest, "greeting_message", greetingMessage); } private Log _log = LogFactoryUtil.getLog(GreeterActionCommand.class); }