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1 package com.icesoft.faces.webapp.http.core;
2
3 import com.icesoft.faces.webapp.command.Command;
4 import com.icesoft.faces.webapp.command.CommandQueue;
5 import com.icesoft.faces.webapp.command.Macro;
6 import com.icesoft.faces.webapp.command.NOOP;
7 import com.icesoft.faces.webapp.http.common.Request;
8 import com.icesoft.faces.webapp.http.common.Server;
9 import com.icesoft.faces.webapp.http.common.standard.FixedXMLContentHandler;
10
11 import java.io.IOException  ;
12 import java.io.Writer ;
13 import java.util.ArrayList ;
14 import java.util.Arrays ;
15 import java.util.HashSet ;
16 import java.util.Iterator ;
17 import java.util.Map ;
18
19 public class SendUpdates implements Server {
20 private static final Command NOOP = new NOOP();
21 private Map commandQueues;
22
23 public SendUpdates(Map commandQueues) {
24 this.commandQueues = commandQueues;
25 }
26
27 public void service(final Request request) throws Exception {
28 request.respondWith(new Handler(commandQueues, request));
29 }
30
31 public void shutdown() {
32 }
33
34 public static class Handler extends FixedXMLContentHandler {
35 private final Request request;
36 private Map commandQueues;
37
38 public Handler(Map commandQueues, Request request) {
39 this.commandQueues = commandQueues;
40 this.request = request;
41 }
42
43 public void writeTo(Writer writer) throws IOException {
44 HashSet viewIdentifierSet = new HashSet (Arrays.asList(request.getParameterAsStrings("viewNumber")));
45 Iterator viewIdentifiers = viewIdentifierSet.iterator();
46 ArrayList commandList = new ArrayList (viewIdentifierSet.size());
47 while (viewIdentifiers.hasNext()) {
48 Object viewIdentifier = viewIdentifiers.next();
49 if (commandQueues.containsKey(viewIdentifier)) {
50 CommandQueue queue = (CommandQueue) commandQueues.get(viewIdentifier);
51 commandList.add(queue.take());
52 }
53 }
54
55 if (commandList.size() > 1) {
56 Command[] commands = (Command[]) commandList.toArray(new Command[commandList.size()]);
57 new Macro(commands).serializeTo(writer);
58 } else if (commandList.size() == 1) {
59 Command command = (Command) commandList.get(0);
60 command.serializeTo(writer);
61 } else {
62 NOOP.serializeTo(writer);
63 }
64 }
65 }
66 }
67 |
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