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A Struts2 plugin for leveraging conversation scopes in Struts2
/*******************************************************************************
*
* Struts2-Conversation-Plugin - An Open Source Conversation- and Flow-Scope Solution for Struts2-based Applications
* =================================================================================================================
*
* Copyright (C) 2012 by Rees Byars
* http://code.google.com/p/struts2-conversation/
*
* **********************************************************************************************************************
*
* 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.
*
* **********************************************************************************************************************
*
* $Id: DefaultInjectionConversationManager.java reesbyars $
******************************************************************************/
package com.google.code.rees.scope.conversation.processing;
import java.lang.reflect.Field;
import java.util.Collection;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.code.rees.scope.conversation.ConversationAdapter;
import com.google.code.rees.scope.conversation.ConversationUtil;
import com.google.code.rees.scope.conversation.configuration.ConversationConfiguration;
import com.google.code.rees.scope.util.ScopeUtil;
/**
* The default implementation of the {@link InjectionConversationManager}
*
* @author rees.byars
*/
public class DefaultInjectionConversationManager extends SimpleConversationManager implements InjectionConversationManager, ConversationPostProcessor {
private static final long serialVersionUID = 8632020943340087L;
private static final Logger LOG = LoggerFactory.getLogger(DefaultInjectionConversationManager.class);
/**
* {@inheritDoc}
*/
@Override
protected void processConversation(ConversationConfiguration conversationConfig, ConversationAdapter conversationAdapter, Object action) {
String actionId = conversationAdapter.getActionId();
String conversationName = conversationConfig.getConversationName();
String conversationId = conversationAdapter.getRequestContext().get(conversationName);
if (LOG.isDebugEnabled()) {
LOG.debug("Processing request for " + conversationName + " and action " + actionId + " of class " + action.getClass());
}
if (conversationId != null) {
if (conversationConfig.containsAction(actionId)) {
Map conversationContext = conversationAdapter
.getConversationContext(conversationName,
conversationId);
if (LOG.isDebugEnabled()) {
LOG.debug("The action is a conversation member. Processing with context: " + conversationContext);
}
if (conversationContext != null) {
Map actionConversationFields = conversationConfig.getFields();
if (actionConversationFields != null) {
ScopeUtil.setFieldValues(action, actionConversationFields, conversationContext);
}
}
if (conversationConfig.isEndAction(actionId)) {
conversationAdapter.addPostProcessor(new ConversationEndProcessor(), conversationConfig, conversationId);
} else {
conversationAdapter.addPostProcessor(this, conversationConfig, conversationId);
conversationAdapter.getViewContext().put(conversationName, conversationId);
}
}
} else if (conversationConfig.isBeginAction(actionId)) {
if (LOG.isDebugEnabled()) {
LOG.debug("Beginning new " + conversationName+ ".");
}
conversationId = ConversationUtil.generateId();
conversationAdapter.addPostProcessor(this, conversationConfig, conversationId);
conversationAdapter.getViewContext().put(conversationName, conversationId);
conversationAdapter.getRequestContext().put(conversationName, conversationId);
}
}
/**
* {@inheritDoc}
*/
@Override
public void postProcessConversation(ConversationAdapter conversationAdapter, ConversationConfiguration conversationConfig, String conversationId) {
String conversationName = conversationConfig.getConversationName();
if (LOG.isDebugEnabled()) {
LOG.debug("Performing post-processing of " + conversationName + " with ID of " + conversationId + "...");
}
Object action = conversationAdapter.getAction();
Map actionConversationFields = conversationConfig.getFields();
if (actionConversationFields != null) {
if (LOG.isDebugEnabled()) {
LOG.debug("Getting conversation fields for " + conversationName + " following execution of action " + conversationAdapter.getActionId());
}
Map conversationContext = conversationAdapter.getConversationContext(conversationName, conversationId);
conversationContext.putAll(ScopeUtil.getFieldValues(action, actionConversationFields));
}
if (LOG.isDebugEnabled()) {
LOG.debug("...completed post-processing of " + conversationName + " with ID of " + conversationId + ".");
}
}
/**
* {@inheritDoc}
*/
@Override
public void injectConversationFields(Object target, ConversationAdapter conversationAdapter) {
Collection actionConversationConfigs = this.configurationProvider.getConfigurations(target.getClass());
if (actionConversationConfigs != null) {
for (ConversationConfiguration conversation : actionConversationConfigs) {
String conversationName = conversation.getConversationName();
String conversationId = conversationAdapter.getRequestContext().get(conversationName);
if (conversationId != null) {
Map conversationContext = conversationAdapter.getConversationContext(conversationName, conversationId);
if (conversationContext != null) {
Map actionConversationFields = conversation.getFields();
if (actionConversationFields != null) {
ScopeUtil.setFieldValues(target, actionConversationFields, conversationContext);
}
}
}
}
}
}
/**
* {@inheritDoc}
*/
@Override
public void extractConversationFields(Object target, ConversationAdapter conversationAdapter) {
Collection actionConversationConfigs = this.configurationProvider.getConfigurations(target.getClass());
if (actionConversationConfigs != null) {
for (ConversationConfiguration conversation : actionConversationConfigs) {
Map actionConversationFields = conversation.getFields();
String conversationName = conversation.getConversationName();
String conversationId = conversationAdapter.getRequestContext().get(conversationName);
if (conversationId == null) {
conversationId = ConversationUtil.generateId();
}
if (actionConversationFields != null) {
Map conversationContext = conversationAdapter.getConversationContext(conversationName, conversationId);
conversationContext.putAll(ScopeUtil.getFieldValues(target, actionConversationFields));
}
conversationAdapter.getViewContext().put(conversationName, conversationId);
}
}
}
}