Mercurial Hosting > luan

comparison src/goodjava/webserver/handlers/DomainHandler.java @ 1402:27efb1fcbcb5

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move luan.lib to goodjava
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 17 Sep 2019 01:35:01 -0400
parents src/luan/lib/webserver/handlers/DomainHandler.java@ef1620aa99cb
children 546edc2df02c
comparison
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1401:ef1620aa99cb 1402:27efb1fcbcb5
1 package goodjava.webserver.handlers;
2
3 import java.io.Closeable;
4 import java.io.IOException;
5 import java.lang.ref.Reference;
6 //import java.lang.ref.WeakReference;
7 import java.lang.ref.SoftReference;
8 import java.lang.ref.ReferenceQueue;
9 import java.util.Map;
10 import java.util.HashMap;
11 import goodjava.logging.Logger;
12 import goodjava.logging.LoggerFactory;
13 import goodjava.webserver.Handler;
14 import goodjava.webserver.Request;
15 import goodjava.webserver.Response;
16
17
18 public final class DomainHandler implements Handler {
19 private static final Logger logger = LoggerFactory.getLogger(DomainHandler.class);
20
21 public interface Factory {
22 public Handler newHandler(String domain);
23 }
24
25 private static void close(Handler handler) {
26 if( handler instanceof Closeable ) {
27 try {
28 ((Closeable)handler).close();
29 } catch(IOException e) {
30 logger.error(handler.toString(),e);
31 }
32 }
33 }
34
35 private final Map<String,Reference<Handler>> map = new HashMap<String,Reference<Handler>>();
36
37 private final Factory factory;
38
39 public DomainHandler(Factory factory) {
40 this.factory = factory;
41 }
42
43 public Response handle(Request request) {
44 String host = (String)request.headers.get("host");
45 if( host == null )
46 return null;
47 int i = host.indexOf(':');
48 String domain = i == -1 ? host : host.substring(0,i);
49 Handler handler = getHandler(domain);
50 return handler==null ? null : handler.handle(request);
51 }
52
53 public Handler getHandler(String domain) {
54 domain = domain.toLowerCase();
55 synchronized(map) {
56 Reference<Handler> ref = map.get(domain);
57 Handler handler = ref==null ? null : ref.get();
58 if( handler == null ) {
59 //if(ref!=null) logger.info("gc "+domain);
60 handler = factory.newHandler(domain);
61 if( handler == null )
62 return null;
63 map.put(domain,new SoftReference<Handler>(handler));
64 }
65 return handler;
66 }
67 }
68
69 public void removeHandler(String domain) {
70 logger.info("removeHandler "+domain);
71 domain = domain.toLowerCase();
72 synchronized(map) {
73 Reference<Handler> ref = map.remove(domain);
74 Handler handler = ref==null ? null : ref.get();
75 if( handler != null ) {
76 close(handler);
77 }
78 }
79 }
80
81 }