Mercurial Hosting > luan
annotate src/goodjava/webserver/handlers/DomainHandler.java @ 1464:465b4a0dae4a
empty list vs map
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Fri, 03 Apr 2020 10:04:52 -0600 |
| parents | 42c07ecb0ddc |
| children | 1b809d2fdf03 |
| rev | line source |
|---|---|
|
1402
27efb1fcbcb5
move luan.lib to goodjava
Franklin Schmidt <fschmidt@gmail.com>
parents:
1401
diff
changeset
|
1 package goodjava.webserver.handlers; |
| 1315 | 2 |
| 3 import java.io.Closeable; | |
| 4 import java.io.IOException; | |
| 5 import java.lang.ref.Reference; | |
| 1401 | 6 //import java.lang.ref.WeakReference; |
| 1315 | 7 import java.lang.ref.SoftReference; |
| 8 import java.lang.ref.ReferenceQueue; | |
| 9 import java.util.Map; | |
| 10 import java.util.HashMap; | |
| 1443 | 11 import java.util.Set; |
| 12 import java.util.Timer; | |
| 13 import java.util.TimerTask; | |
| 14 import java.util.concurrent.ConcurrentHashMap; | |
|
1402
27efb1fcbcb5
move luan.lib to goodjava
Franklin Schmidt <fschmidt@gmail.com>
parents:
1401
diff
changeset
|
15 import goodjava.logging.Logger; |
|
27efb1fcbcb5
move luan.lib to goodjava
Franklin Schmidt <fschmidt@gmail.com>
parents:
1401
diff
changeset
|
16 import goodjava.logging.LoggerFactory; |
|
27efb1fcbcb5
move luan.lib to goodjava
Franklin Schmidt <fschmidt@gmail.com>
parents:
1401
diff
changeset
|
17 import goodjava.webserver.Handler; |
|
27efb1fcbcb5
move luan.lib to goodjava
Franklin Schmidt <fschmidt@gmail.com>
parents:
1401
diff
changeset
|
18 import goodjava.webserver.Request; |
|
27efb1fcbcb5
move luan.lib to goodjava
Franklin Schmidt <fschmidt@gmail.com>
parents:
1401
diff
changeset
|
19 import goodjava.webserver.Response; |
| 1315 | 20 |
| 21 | |
| 22 public final class DomainHandler implements Handler { | |
| 23 private static final Logger logger = LoggerFactory.getLogger(DomainHandler.class); | |
| 24 | |
| 25 public interface Factory { | |
| 26 public Handler newHandler(String domain); | |
| 27 } | |
| 28 | |
| 1443 | 29 private static class MyTask extends TimerTask { |
| 30 private final Set<Handler> dontGc; | |
| 31 | |
| 32 MyTask(Set<Handler> dontGc) { | |
| 33 this.dontGc = dontGc; | |
| 34 } | |
| 35 | |
| 36 public void run() { | |
| 37 dontGc.clear(); | |
| 38 logger.info("dontGc.clear()"); | |
| 1315 | 39 } |
| 40 } | |
| 41 | |
| 1443 | 42 private static final long HOUR = 1000L*60*60; |
| 1401 | 43 private final Map<String,Reference<Handler>> map = new HashMap<String,Reference<Handler>>(); |
| 1443 | 44 private final Set<Handler> dontGc = ConcurrentHashMap.newKeySet(); |
| 45 private final Timer timer = new Timer(); | |
| 1315 | 46 |
| 47 private final Factory factory; | |
| 48 | |
| 49 public DomainHandler(Factory factory) { | |
| 50 this.factory = factory; | |
| 1443 | 51 timer.schedule(new MyTask(dontGc),HOUR,HOUR); |
| 52 } | |
| 53 | |
| 54 protected void finalize() throws Throwable { | |
| 55 timer.cancel(); | |
| 1315 | 56 } |
| 57 | |
| 58 public Response handle(Request request) { | |
| 59 String host = (String)request.headers.get("host"); | |
| 1331 | 60 if( host == null ) |
| 61 return null; | |
| 1315 | 62 int i = host.indexOf(':'); |
| 63 String domain = i == -1 ? host : host.substring(0,i); | |
| 64 Handler handler = getHandler(domain); | |
| 1443 | 65 if( handler==null ) |
| 66 return null; | |
| 67 dontGc.add(handler); | |
| 68 return handler.handle(request); | |
| 1315 | 69 } |
| 70 | |
| 71 public Handler getHandler(String domain) { | |
| 1401 | 72 domain = domain.toLowerCase(); |
| 73 synchronized(map) { | |
| 74 Reference<Handler> ref = map.get(domain); | |
| 75 Handler handler = ref==null ? null : ref.get(); | |
| 76 if( handler == null ) { | |
| 77 //if(ref!=null) logger.info("gc "+domain); | |
| 78 handler = factory.newHandler(domain); | |
| 79 if( handler == null ) | |
| 80 return null; | |
| 81 map.put(domain,new SoftReference<Handler>(handler)); | |
| 82 } | |
| 83 return handler; | |
| 84 } | |
| 1315 | 85 } |
| 86 | |
| 87 public void removeHandler(String domain) { | |
| 1405 | 88 //logger.info("removeHandler "+domain); |
| 1315 | 89 domain = domain.toLowerCase(); |
| 90 synchronized(map) { | |
| 1401 | 91 Reference<Handler> ref = map.remove(domain); |
| 92 Handler handler = ref==null ? null : ref.get(); | |
| 93 if( handler != null ) { | |
| 94 close(handler); | |
| 1315 | 95 } |
| 96 } | |
| 97 } | |
| 98 | |
| 1443 | 99 private static void close(Handler handler) { |
| 100 if( handler instanceof Closeable ) { | |
| 101 try { | |
| 102 ((Closeable)handler).close(); | |
| 103 } catch(IOException e) { | |
| 104 logger.error(handler.toString(),e); | |
| 105 } | |
| 106 } | |
| 107 } | |
| 108 | |
| 1315 | 109 } |