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Improve GUI and clean up code

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git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@823807 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
rfeng 2009-10-10 06:47:55 +00:00
parent b7878fb975
commit 89b23362d1
1 changed files with 52 additions and 26 deletions
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78
sandbox/rfeng/helloworld-jsp-google-appengine/src/sample/HelloworldServiceImpl.java
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@ -35,6 +35,7 @@ import com.google.appengine.api.datastore.EntityNotFoundException;
import com.google.appengine.api.datastore.Key;
import com.google.appengine.api.datastore.KeyFactory;
import com.google.appengine.api.datastore.Transaction;
import com.google.appengine.api.memcache.Expiration;
import com.google.appengine.api.memcache.MemcacheService;
import com.google.appengine.api.urlfetch.HTTPResponse;
import com.google.appengine.api.urlfetch.URLFetchService;
@ -61,13 +62,38 @@ public class HelloworldServiceImpl implements HelloworldService {
User user = userService.getCurrentUser();
String id = (user == null) ? "" : user.getUserId();
Stack<String> stack = (Stack<String>)memcacheService.get("history");
if (stack == null) {
stack = new Stack<String>();
}
stack.push(new Date().toString() + ": " + name);
memcacheService.put("history", stack);
Stack<String> stack = cacheHistory(name);
Long count = countInStore();
String content = fetch();
return "[" + id
+ "] Hello "
+ name
+ "<hr><h2>Content from Tuscany Web Site via URLFetch</h2><p>"
+ content
+ "<p>"
+ toHTML(stack)
+ "</p><b>Counter from DataStore: "
+ count
+ "</b><p>";
}
private String fetch() {
String content = "";
try {
HTTPResponse response = fetchService.fetch(new URL("http://tuscany.apache.org"));
content = new String(response.getContent(), 0, 1024);
content = content.replace("<", "&lt;");
content = content.replace(">", "&gt;");
content = content.replace("\"", "&quot;");
} catch (IOException e) {
e.printStackTrace();
}
return content;
}
private Long countInStore() {
Transaction tx = datastoreService.beginTransaction();
Entity entity = null;
Key key = KeyFactory.createKey("HitCounter", "countter");
@ -79,31 +105,31 @@ public class HelloworldServiceImpl implements HelloworldService {
}
Long count = (Long)entity.getProperty("counter");
entity.setProperty("counter", new Long(count.longValue() + 1));
count = new Long(count.longValue() + 1);
entity.setProperty("counter", count);
datastoreService.put(tx, entity);
tx.commit();
return count;
}
String content = "";
try {
HTTPResponse response = fetchService.fetch(new URL("http://tuscany.apache.org"));
content = new String(response.getContent(), 0, 1024);
content = content.replace("<", "&lt;");
content = content.replace(">", "&gt;");
content = content.replace("\"", "&quot;");
} catch (IOException e) {
e.printStackTrace();
private Stack<String> cacheHistory(String name) {
Stack<String> stack = (Stack<String>)memcacheService.get("history");
if (stack == null) {
stack = new Stack<String>();
}
return "[" + id
+ "] Hello "
+ name
+ "<hr><h1>Content from Tuscany Web Site</h1><p>"
+ content
+ "<p>History<hr>"
+ stack
+ "</p><b>"
+ count
+ "</b>";
stack.push(new Date().toString() + ": " + name);
memcacheService.put("history", stack, Expiration.byDeltaSeconds(60));
return stack;
}
private String toHTML(Stack<String> stack) {
StringBuffer html = new StringBuffer("<h2>History from Memcache (expired in 1 minute)</h2><hr><ul>");
for (String item : stack) {
html.append("<li>").append(item).append("</li>");
}
html.append("</ul><hr>");
return html.toString();
}
@Init