001package org.apache.turbine.pipeline; 002 003 004/* 005 * Licensed to the Apache Software Foundation (ASF) under one 006 * or more contributor license agreements. See the NOTICE file 007 * distributed with this work for additional information 008 * regarding copyright ownership. The ASF licenses this file 009 * to you under the Apache License, Version 2.0 (the 010 * "License"); you may not use this file except in compliance 011 * with the License. You may obtain a copy of the License at 012 * 013 * http://www.apache.org/licenses/LICENSE-2.0 014 * 015 * Unless required by applicable law or agreed to in writing, 016 * software distributed under the License is distributed on an 017 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 018 * KIND, either express or implied. See the License for the 019 * specific language governing permissions and limitations 020 * under the License. 021 */ 022 023 024import java.io.IOException; 025 026import org.apache.logging.log4j.LogManager; 027import org.apache.logging.log4j.Logger; 028import org.apache.turbine.util.RunData; 029import org.apache.turbine.util.TurbineException; 030import org.apache.turbine.util.uri.URIConstants; 031 032/** 033 * This valve is responsible for setting the 'action' property of RunData based 034 * on request parameter. There is no default action, since a null action is 035 * perfectly valid. 036 * 037 * @author <a href="mailto:james@jamestaylor.org">James Taylor</a> 038 * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a> 039 */ 040public class DetermineActionValve 041 implements Valve 042{ 043 private static final Logger log 044 = LogManager.getLogger(DetermineActionValve.class); 045 046 /** 047 * @see org.apache.turbine.pipeline.Valve#invoke(PipelineData, ValveContext) 048 */ 049 @Override 050 public void invoke(PipelineData pipelineData, ValveContext context) 051 throws IOException, TurbineException 052 { 053 RunData data = pipelineData.getRunData(); 054 if (!data.hasAction()) 055 { 056 String action = 057 data.getParameters().getString(URIConstants.CGI_ACTION_PARAM); 058 059 if (action != null) 060 { 061 data.setAction(action); 062 log.debug("Set action from request parameter"); 063 } 064 else 065 { 066 log.debug("No action"); 067 } 068 } 069 070 log.debug("Action is now: {}", data::getAction); 071 072 // Pass control to the next Valve in the Pipeline 073 context.invokeNext(pipelineData); 074 } 075}