annotate src/goodjava/webserver/handlers/DomainHandler.java @ 1417:c7f9dd062eda

lucene cleanup
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 18 Oct 2019 19:38:08 -0600
parents 546edc2df02c
children 42c07ecb0ddc
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1 package goodjava.webserver.handlers;
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2
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3 import java.io.Closeable;
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4 import java.io.IOException;
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5 import java.lang.ref.Reference;
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6 //import java.lang.ref.WeakReference;
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7 import java.lang.ref.SoftReference;
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8 import java.lang.ref.ReferenceQueue;
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9 import java.util.Map;
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10 import java.util.HashMap;
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11 import goodjava.logging.Logger;
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12 import goodjava.logging.LoggerFactory;
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13 import goodjava.webserver.Handler;
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14 import goodjava.webserver.Request;
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15 import goodjava.webserver.Response;
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18 public final class DomainHandler implements Handler {
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19 private static final Logger logger = LoggerFactory.getLogger(DomainHandler.class);
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20
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21 public interface Factory {
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22 public Handler newHandler(String domain);
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23 }
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25 private static void close(Handler handler) {
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26 if( handler instanceof Closeable ) {
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27 try {
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28 ((Closeable)handler).close();
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29 } catch(IOException e) {
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30 logger.error(handler.toString(),e);
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31 }
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32 }
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33 }
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34
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35 private final Map<String,Reference<Handler>> map = new HashMap<String,Reference<Handler>>();
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37 private final Factory factory;
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38
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39 public DomainHandler(Factory factory) {
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40 this.factory = factory;
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41 }
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42
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43 public Response handle(Request request) {
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44 String host = (String)request.headers.get("host");
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45 if( host == null )
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46 return null;
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47 int i = host.indexOf(':');
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48 String domain = i == -1 ? host : host.substring(0,i);
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49 Handler handler = getHandler(domain);
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50 return handler==null ? null : handler.handle(request);
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51 }
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52
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53 public Handler getHandler(String domain) {
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54 domain = domain.toLowerCase();
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55 synchronized(map) {
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56 Reference<Handler> ref = map.get(domain);
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57 Handler handler = ref==null ? null : ref.get();
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58 if( handler == null ) {
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59 //if(ref!=null) logger.info("gc "+domain);
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60 handler = factory.newHandler(domain);
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61 if( handler == null )
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62 return null;
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63 map.put(domain,new SoftReference<Handler>(handler));
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64 }
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65 return handler;
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66 }
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67 }
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69 public void removeHandler(String domain) {
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70 //logger.info("removeHandler "+domain);
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71 domain = domain.toLowerCase();
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72 synchronized(map) {
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73 Reference<Handler> ref = map.remove(domain);
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74 Handler handler = ref==null ? null : ref.get();
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75 if( handler != null ) {
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76 close(handler);
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77 }
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78 }
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79 }
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81 }