src/jdk.httpserver/share/classes/com/sun/net/httpserver/spi/HttpServerProvider.java
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.httpserver/share/classes/com/sun/net/httpserver/spi/HttpServerProvider.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,179 @@
+/*
+ * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package com.sun.net.httpserver.spi;
+
+import java.io.IOException;
+import java.net.*;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.Iterator;
+import java.util.ServiceLoader;
+import java.util.ServiceConfigurationError;
+import com.sun.net.httpserver.*;
+
+/**
+ * Service provider class for HttpServer.
+ * Sub-classes of HttpServerProvider provide an implementation of
+ * {@link HttpServer} and associated classes. Applications do not normally use
+ * this class. See {@link #provider()} for how providers are found and loaded.
+ */
+public abstract class HttpServerProvider {
+
+ /**
+ * creates a HttpServer from this provider
+ *
+ * @param addr
+ * the address to bind to. May be {@code null}
+ *
+ * @param backlog
+ * the socket backlog. A value of {@code zero} means the systems default
+ */
+ public abstract HttpServer createHttpServer(InetSocketAddress addr,
+ int backlog)
+ throws IOException;
+
+ /**
+ * creates a HttpsServer from this provider
+ *
+ * @param addr
+ * the address to bind to. May be {@code null}
+ *
+ * @param backlog
+ * the socket backlog. A value of {@code zero} means the systems default
+ */
+ public abstract HttpsServer createHttpsServer(InetSocketAddress addr,
+ int backlog)
+ throws IOException;
+
+ private static final Object lock = new Object();
+ private static HttpServerProvider provider = null;
+
+ /**
+ * Initializes a new instance of this class.
+ *
+ * @throws SecurityException
+ * If a security manager has been installed and it denies
+ * {@link RuntimePermission}{@code ("httpServerProvider")}
+ */
+ protected HttpServerProvider() {
+ SecurityManager sm = System.getSecurityManager();
+ if (sm != null)
+ sm.checkPermission(new RuntimePermission("httpServerProvider"));
+ }
+
+ private static boolean loadProviderFromProperty() {
+ String cn = System.getProperty("com.sun.net.httpserver.HttpServerProvider");
+ if (cn == null)
+ return false;
+ try {
+ @SuppressWarnings("deprecation")
+ Object o = Class.forName(cn, true,
+ ClassLoader.getSystemClassLoader()).newInstance();
+ provider = (HttpServerProvider)o;
+ return true;
+ } catch (ClassNotFoundException |
+ IllegalAccessException |
+ InstantiationException |
+ SecurityException x) {
+ throw new ServiceConfigurationError(null, x);
+ }
+ }
+
+ private static boolean loadProviderAsService() {
+ Iterator<HttpServerProvider> i =
+ ServiceLoader.load(HttpServerProvider.class,
+ ClassLoader.getSystemClassLoader())
+ .iterator();
+ for (;;) {
+ try {
+ if (!i.hasNext())
+ return false;
+ provider = i.next();
+ return true;
+ } catch (ServiceConfigurationError sce) {
+ if (sce.getCause() instanceof SecurityException) {
+ // Ignore the security exception, try the next provider
+ continue;
+ }
+ throw sce;
+ }
+ }
+ }
+
+ /**
+ * Returns the system wide default HttpServerProvider for this invocation of
+ * the Java virtual machine.
+ *
+ * <p> The first invocation of this method locates the default provider
+ * object as follows: </p>
+ *
+ * <ol>
+ *
+ * <li><p> If the system property
+ * {@code com.sun.net.httpserver.HttpServerProvider} is defined then it
+ * is taken to be the fully-qualified name of a concrete provider class.
+ * The class is loaded and instantiated; if this process fails then an
+ * unspecified unchecked error or exception is thrown. </p></li>
+ *
+ * <li><p> If a provider class has been installed in a jar file that is
+ * visible to the system class loader, and that jar file contains a
+ * provider-configuration file named
+ * {@code com.sun.net.httpserver.HttpServerProvider} in the resource
+ * directory {@code META-INF/services}, then the first class name
+ * specified in that file is taken. The class is loaded and
+ * instantiated; if this process fails then an unspecified unchecked error
+ * or exception is thrown. </p></li>
+ *
+ * <li><p> Finally, if no provider has been specified by any of the above
+ * means then the system-default provider class is instantiated and the
+ * result is returned. </p></li>
+ *
+ * </ol>
+ *
+ * <p> Subsequent invocations of this method return the provider that was
+ * returned by the first invocation. </p>
+ *
+ * @return The system-wide default HttpServerProvider
+ */
+ public static HttpServerProvider provider () {
+ synchronized (lock) {
+ if (provider != null)
+ return provider;
+ return (HttpServerProvider)AccessController
+ .doPrivileged(new PrivilegedAction<Object>() {
+ public Object run() {
+ if (loadProviderFromProperty())
+ return provider;
+ if (loadProviderAsService())
+ return provider;
+ provider = new sun.net.httpserver.DefaultHttpServerProvider();
+ return provider;
+ }
+ });
+ }
+ }
+
+}