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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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34 public class ThreadContext {
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37 private static final ThreadLocal<ThreadContext> THREAD_LOCAL = new ThreadLocal<ThreadContext>();
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40 private final HttpServletRequest request;
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43 private final HttpServletResponse response;
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46 private ResourceBundle messagesResourceBundle = null;
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49 private Map<String, Object> messages = null;
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52 private MessagesBehaviour messagesBehaviour;
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62 private ThreadContext(final HttpServletRequest request,
63 final HttpServletResponse response) {
64 this.request = request;
65 this.response = response;
66 }
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73 private static ThreadContext getContext() {
74 final ThreadContext context = THREAD_LOCAL.get();
75 if (context == null) {
76 throw new IllegalStateException(
77 "Could not get context from ThreadLocal. run in context scope.");
78 }
79 return context;
80 }
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87 public static HttpServletRequest getRequest() {
88 return getContext().request;
89 }
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96 public static HttpServletResponse getResponse() {
97 return getContext().response;
98 }
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105 public static ResourceBundle getMessagesResourceBundle() {
106 final ThreadContext context = getContext();
107 if (context.messagesResourceBundle == null) {
108 final MessagesBehaviour messagesBehaviour = getMessagesBehaviour(context);
109 context.messagesResourceBundle = messagesBehaviour
110 .getBundle(context.request.getLocale());
111 }
112 return context.messagesResourceBundle;
113 }
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121 public static Map<String, Object> getMessagesMap() {
122 final ThreadContext context = getContext();
123 if (context.messages == null) {
124 final ResourceBundle bundle = getMessagesResourceBundle();
125 final MessagesBehaviour messagesBehaviour = getMessagesBehaviour(context);
126 context.messages = messagesBehaviour.toMap(bundle);
127 }
128 return context.messages;
129 }
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138 private static MessagesBehaviour getMessagesBehaviour(
139 final ThreadContext context) {
140 if (context.messagesBehaviour == null) {
141 final Container container = ProviderFactory.get(
142 ContainerProvider.class).getContainer();
143 context.messagesBehaviour = container
144 .lookup(MessagesBehaviour.class);
145 }
146 return context.messagesBehaviour;
147 }
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161 public static void runInContext(final HttpServletRequest request,
162 final HttpServletResponse response, final Command command)
163 throws Exception {
164 if (request == null) {
165 throw new NullPointerException("request");
166 }
167 if (response == null) {
168 throw new NullPointerException("response");
169 }
170 if (command == null) {
171 throw new NullPointerException("command");
172 }
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174 final ThreadContext previous = THREAD_LOCAL.get();
175 final ThreadContext context = new ThreadContext(request, response);
176 THREAD_LOCAL.set(context);
177 try {
178 command.execute(request, response);
179 } finally {
180 if (previous == null) {
181 THREAD_LOCAL.remove();
182 } else {
183 THREAD_LOCAL.set(previous);
184 }
185 }
186 }
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193 public interface Command {
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205 void execute(HttpServletRequest request, HttpServletResponse response)
206 throws Exception;
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208 }
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210 }