/*
* Copyright (c) 2002-2012 Alibaba Group Holding Limited.
* All rights reserved.
*
* 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.alibaba.citrus.turbine.pipeline.valve;
import static com.alibaba.citrus.turbine.TurbineConstant.*;
import static com.alibaba.citrus.turbine.util.TurbineUtil.*;
import javax.servlet.http.HttpServletRequest;
import com.alibaba.citrus.service.moduleloader.ModuleLoaderException;
import com.alibaba.citrus.service.moduleloader.ModuleLoaderService;
import com.alibaba.citrus.service.pipeline.PipelineContext;
import com.alibaba.citrus.service.pipeline.PipelineException;
import com.alibaba.citrus.service.pipeline.support.AbstractValve;
import com.alibaba.citrus.service.pipeline.support.AbstractValveDefinitionParser;
import com.alibaba.citrus.turbine.TurbineRunData;
import com.alibaba.citrus.util.StringUtil;
import org.springframework.beans.factory.annotation.Autowired;
/**
* 执行action module，通常用来处理用户提交的表单。
*
* @author Michael Zhou
*/
public class PerformActionValve extends AbstractValve {
@Autowired
private HttpServletRequest request;
@Autowired
private ModuleLoaderService moduleLoaderService;
public void invoke(PipelineContext pipelineContext) throws Exception {
TurbineRunData rundata = getTurbineRunData(request);
// 检查重定向标志，如果是重定向，则不需要将页面输出。
if (!rundata.isRedirected()) {
String action = rundata.getAction();
// 如果找到action，则执行之。
if (!StringUtil.isEmpty(action)) {
String actionKey = "_action_" + action;
// 防止重复执行同一个action。
if (rundata.getRequest().getAttribute(actionKey) == null) {
rundata.getRequest().setAttribute(actionKey, "executed");
try {
moduleLoaderService.getModule(ACTION_MODULE, action).execute();
} catch (ModuleLoaderException e) {
throw new PipelineException("Could not load action module: " + action, e);
} catch (Exception e) {
throw new PipelineException("Failed to execute action module", e);
}
}
}
}
pipelineContext.invokeNext();
}
public static class DefinitionParser extends AbstractValveDefinitionParser<PerformActionValve> {
}
}