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package com.sun.xml.ws.transport.http.server;
import com.sun.net.httpserver.HttpContext;
import com.sun.net.httpserver.HttpServer;
import com.sun.xml.ws.server.ServerRtException;
import java.net.InetSocketAddress;
import java.net.URL;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.logging.Logger;
/**
* Manages all the WebService HTTP servers created by JAXWS runtime.
*
* @author Jitendra Kotamraju
*/
final class ServerMgr {
private static final ServerMgr serverMgr = new ServerMgr();
private static final Logger logger =
Logger.getLogger(
com.sun.xml.ws.util.Constants.LoggingDomain + ".server.http");
private final Map<InetSocketAddress,ServerState> servers = new HashMap<InetSocketAddress,ServerState>();
private ServerMgr() {}
/**
* Gets the singleton instance.
* @return manager instance
*/
static ServerMgr getInstance() {
return serverMgr;
}
/*
* Creates a HttpContext at the given address. If there is already a server
* it uses that server to create a context. Otherwise, it creates a new
* HTTP server. This sever is added to servers Map.
*/
/*package*/ HttpContext createContext(String address) {
try {
HttpServer server;
ServerState state;
URL url = new URL(address);
int port = url.getPort();
if (port == -1) {
port = url.getDefaultPort();
}
InetSocketAddress inetAddress = new InetSocketAddress(url.getHost(),
port);
synchronized(servers) {
state = servers.get(inetAddress);
if (state == null) {
logger.fine("Creating new HTTP Server at "+inetAddress);
// Creates server with default socket backlog
server = HttpServer.create(inetAddress, 0);
server.setExecutor(Executors.newCachedThreadPool());
String path = url.toURI().getPath();
logger.fine("Creating HTTP Context at = "+path);
HttpContext context = server.createContext(path);
server.start();
// we have to get actual inetAddress from server, which can differ from the original in some cases.
// e.g. A port number of zero will let the system pick up an ephemeral port in a bind operation,
// or IP: 0.0.0.0 - which is used to monitor network traffic from any valid IP address
inetAddress = server.getAddress();
logger.fine("HTTP server started = "+inetAddress);
state = new ServerState(server, path);
servers.put(inetAddress, state);
return context;
}
}
server = state.getServer();
if (state.getPaths().contains(url.getPath())) {
String err = "Context with URL path "+url.getPath()+ " already exists on the server "+server.getAddress();
logger.fine(err);
throw new IllegalArgumentException(err);
}
logger.fine("Creating HTTP Context at = "+url.getPath());
HttpContext context = server.createContext(url.getPath());
state.oneMoreContext(url.getPath());
return context;
} catch(Exception e) {
throw new ServerRtException("server.rt.err",e );
}
}
/*
* Removes a context. If the server doesn't have anymore contexts, it
* would stop the server and server is removed from servers Map.
*/
/*package*/ void removeContext(HttpContext context) {
InetSocketAddress inetAddress = context.getServer().getAddress();
synchronized(servers) {
ServerState state = servers.get(inetAddress);
int instances = state.noOfContexts();
if (instances < 2) {
((ExecutorService)state.getServer().getExecutor()).shutdown();
state.getServer().stop(0);
servers.remove(inetAddress);
} else {
state.getServer().removeContext(context);
state.oneLessContext(context.getPath());
}
}
}
private static final class ServerState {
private final HttpServer server;
private int instances;
private Set<String> paths = new HashSet<String>();
ServerState(HttpServer server, String path) {
this.server = server;
this.instances = 1;
paths.add(path);
}
public HttpServer getServer() {
return server;
}
public void oneMoreContext(String path) {
++instances;
paths.add(path);
}
public void oneLessContext(String path) {
--instances;
paths.remove(path);
}
public int noOfContexts() {
return instances;
}
public Set<String> getPaths() {
return paths;
}
}
}