📄 java后台服务程序设计.mht
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=E7=B1=BB=E6=96=87=E4=BB=B6Server.java=E3=80=91
import java.util.*;
import java.io.*;
import java.net.*;
public class Server {
protected Map services;
Set connections; =20
int maxConnections; =20
int freeConn;
ThreadGroup threadGroup;
private int currentConn;
private PrintWriter log =3D new PrintWriter(System.out, true);
public boolean connected =3D false;
public Properties proPort, proNum;
=20
public synchronized void setControlFlag() {
connected =3D true;
}
=20
public synchronized void removeControlFlag() {
connected =3D false;
} =20
public void setProperty(Properties proPort, Properties proNum) {
this.proPort =3D proPort;
this.proNum =3D proNum;
}
=20
public Server(int maxConn) {
this.maxConnections =3D maxConn;
this.freeConn=3DmaxConnections;
this.threadGroup =3D new ThreadGroup(Server.class.getName());
currentConn =3D 0;
this.services =3D new HashMap();
this.connections =3D new HashSet(maxConnections);
}
public synchronized void addService(Service service,int port, int =
maxConn) throws IOException {
<!-- code sample is too wide --> String servicename =3D =
service.getClass().getName();
Integer key =3D new Integer(port);
if (services.get(key) !=3D null) throw new =
IllegalArgumentException("=E7=AB=AF=E5=8F=A3:" + port + " =
=E5=B7=B2=E7=BB=8F=E8=A2=AB=E5=8D=A0=E7=94=A8=EF=BC=81");
<!-- code sample is too wide --> if =
(getfreeConnections(maxConn)>=3D0) {
Listener listener =3D new Listener(this, port, service, =
maxConn);
services.put(key,listener);
log.println("=E5=90=AF=E5=8A=A8" + servicename + =
"=E6=9C=8D=E5=8A=A1=E5=9C=A8" + port +"=E7=AB=AF=E5=8F=A3=E4=B8=8A");
listener.start();
} else {
=
System.err.println("=E7=B3=BB=E7=BB=9F=E5=B9=B6=E5=8F=91=E8=BF=9E=E6=8E=A5=
=E9=99=90=E5=88=B6=E5=B7=B2=E7=BB=8F=E8=BE=BE=E5=88=B0=E6=9C=80=E5=A4=A7=E5=
=80=BC!");
System.err.println("=E6=9C=8D=E5=8A=A1" + servicename + " =
=E5=90=AF=E5=8A=A8=E5=A4=B1=E8=B4=A5!");
}
}
public synchronized void addService(Service service,int port) throws =
IOException {
this.addService(service,port,10);
}
public synchronized boolean removeService(int port) {
Integer key =3D new Integer(port);
int maxConn =3D10;
final Listener listener =3D (Listener) services.get(key);
if (listener =3D=3D null) {
log.println("Service " + " isn't started on port " + port);
return false;
}
services.remove(key);
listener.pleaseStop();=20
freeConn+=3Dlistener.maxConn;
log.println("Close " + listener.service + " on port " + port);
return true;
}
public synchronized void displayStatus(PrintWriter out) {
Iterator keys =3D services.keySet().iterator();
while (keys.hasNext()) {
Integer port =3D (Integer) keys.next();
Listener listener =3D (Listener) services.get(port);
out.println("=E6=9C=8D=E5=8A=A1" + listener.service + =
"=E8=BF=90=E8=A1=8C" + port + "\n");
}
out.println("=E8=BF=9E=E6=8E=A5=E9=99=90=E5=88=B6=E4=B8=BA" + =
maxConnections);
Iterator conns =3D connections.iterator();
while (conns.hasNext()) {
Socket s =3D (Socket) conns.next();
int sport =3D s.getLocalPort();
Listener listen =3D (Listener) services.get(new =
Integer(sport));
String servicename =3D listen.service;
out.println(servicename + =
"=E5=93=8D=E5=BA=94=E8=AF=B7=E6=B1=82=E5=9C=A8" + =
s.getInetAddress().getHostAddress() + "=E7=9A=84" + sport + =
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