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16 package org.seasar.cubby.internal.controller;
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18 import java.util.Map;
19 import java.util.ResourceBundle;
20
21 import javax.servlet.http.HttpServletRequest;
22 import javax.servlet.http.HttpServletResponse;
23
24 import org.seasar.cubby.controller.MessagesBehaviour;
25 import org.seasar.cubby.spi.ContainerProvider;
26 import org.seasar.cubby.spi.ProviderFactory;
27 import org.seasar.cubby.spi.container.Container;
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35 public class ThreadContext {
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38 private static final ThreadLocal<ThreadContext> THREAD_LOCAL = new ThreadLocal<ThreadContext>();
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41 private final HttpServletRequest request;
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44 private final HttpServletResponse response;
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47 private ResourceBundle messagesResourceBundle = null;
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50 private Map<String, Object> messages = null;
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53 private MessagesBehaviour messagesBehaviour;
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63 private ThreadContext(final HttpServletRequest request,
64 final HttpServletResponse response) {
65 this.request = request;
66 this.response = response;
67 }
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74 private static ThreadContext getContext() {
75 final ThreadContext context = THREAD_LOCAL.get();
76 if (context == null) {
77 throw new IllegalStateException(
78 "Could not get context from ThreadLocal. run in context scope.");
79 }
80 return context;
81 }
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88 public static HttpServletRequest getRequest() {
89 return getContext().request;
90 }
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97 public static HttpServletResponse getResponse() {
98 return getContext().response;
99 }
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106 public static ResourceBundle getMessagesResourceBundle() {
107 final ThreadContext context = getContext();
108 if (context.messagesResourceBundle == null) {
109 final MessagesBehaviour messagesBehaviour = getMessagesBehaviour(context);
110 context.messagesResourceBundle = messagesBehaviour
111 .getBundle(context.request.getLocale());
112 }
113 return context.messagesResourceBundle;
114 }
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122 public static Map<String, Object> getMessagesMap() {
123 final ThreadContext context = getContext();
124 if (context.messages == null) {
125 final ResourceBundle bundle = getMessagesResourceBundle();
126 final MessagesBehaviour messagesBehaviour = getMessagesBehaviour(context);
127 context.messages = messagesBehaviour.toMap(bundle);
128 }
129 return context.messages;
130 }
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139 private static MessagesBehaviour getMessagesBehaviour(
140 final ThreadContext context) {
141 if (context.messagesBehaviour == null) {
142 final Container container = ProviderFactory.get(
143 ContainerProvider.class).getContainer();
144 context.messagesBehaviour = container
145 .lookup(MessagesBehaviour.class);
146 }
147 return context.messagesBehaviour;
148 }
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162 public static void runInContext(final HttpServletRequest request,
163 final HttpServletResponse response, final Command command)
164 throws Exception {
165 if (request == null) {
166 throw new NullPointerException("request");
167 }
168 if (response == null) {
169 throw new NullPointerException("response");
170 }
171 if (command == null) {
172 throw new NullPointerException("command");
173 }
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175 final ThreadContext previous = THREAD_LOCAL.get();
176 final ThreadContext context = new ThreadContext(request, response);
177 THREAD_LOCAL.set(context);
178 try {
179 command.execute(request, response);
180 } finally {
181 if (previous == null) {
182 THREAD_LOCAL.remove();
183 } else {
184 THREAD_LOCAL.set(previous);
185 }
186 }
187 }
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194 public interface Command {
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206 void execute(HttpServletRequest request, HttpServletResponse response)
207 throws Exception;
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209 }
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211 }