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HSQLDB example source code file (HsqlSocketFactory.java)
The HSQLDB HsqlSocketFactory.java source code/* Copyright (c) 2001-2008, The HSQL Development Group * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of the HSQL Development Group nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG, * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package org.hsqldb; import java.lang.reflect.Constructor; import java.lang.reflect.InvocationTargetException; import java.net.InetAddress; import java.net.ServerSocket; import java.net.Socket; /** * Base class for producing the Socket objects used by HSQLDB. * * @author unsaved@users * @author boucherb@users * @version 1.7.2 * @since 1.7.2 */ public class HsqlSocketFactory { // ----------------------------- static members --------------------------------- private static HsqlSocketFactory plainImpl; private static HsqlSocketFactory sslImpl; // ------------------------------ constructors --------------------------------- /** * External construction disabled. New factory instances are retreived * through the newHsqlSocketFactory method instead. */ protected HsqlSocketFactory() throws Exception {} // ------------------------- factory builder method ---------------------------- /** * Retrieves an HsqlSocketFactory whose subclass and attributes are * determined by the specified argument, tls. * * @param tls whether to retrieve a factory producing SSL sockets * @throws Exception if the new factory cannot be constructed or is * of the wrong type * @return a new factory */ public static HsqlSocketFactory getInstance(boolean tls) throws Exception { return tls ? getSSLImpl() : getPlainImpl(); } // -------------------------- public instance methods -------------------------- public void configureSocket(Socket socket) { // default: do nothing } /** * Returns a server socket bound to the specified port. * The socket is configured with the socket options * given to this factory. * * @return the ServerSocket * @param port the port to which to bind the ServerSocket * @throws Exception if a network error occurs */ public ServerSocket createServerSocket(int port) throws Exception { return new ServerSocket(port); } /** * Returns a server socket bound to the specified port. * The socket is configured with the socket options * given to this factory. * * @return the ServerSocket * @param port the port to which to bind the ServerSocket * @throws Exception if a network error occurs */ public ServerSocket createServerSocket(int port, String address) throws Exception { return new ServerSocket(port, 128, InetAddress.getByName(address)); } /** * Creates a socket and connects it to the specified remote host at the * specified remote port. This socket is configured using the socket options * established for this factory. * * @return the socket * @param host the server host * @param port the server port * @throws Exception if a network error occurs */ public Socket createSocket(String host, int port) throws Exception { return new Socket(host, port); } /** * Retrieves whether this factory produces secure sockets. * * @return true if this factory produces secure sockets */ public boolean isSecure() { return false; } // ------------------------ static utility methods ----------------------------- private static HsqlSocketFactory getPlainImpl() throws Exception { synchronized (HsqlSocketFactory.class) { if (plainImpl == null) { plainImpl = new HsqlSocketFactory(); } } return plainImpl; } private static HsqlSocketFactory getSSLImpl() throws Exception { synchronized (HsqlSocketFactory.class) { if (sslImpl == null) { sslImpl = newFactory("org.hsqldb.HsqlSocketFactorySecure"); } } return sslImpl; } /** * Retrieves a new HsqlSocketFactory whose class * is determined by the implClass argument. The basic contract here * is that implementations constructed by this method should return * true upon calling isSecure() iff they actually create secure sockets. * There is no way to guarantee this directly here, so it is simply * trusted that an implementation is secure if it returns true * for calls to isSecure(); * * @return a new secure socket factory * @param implClass the fully qaulified name of the desired * class to construct * @throws Exception if a new secure socket factory cannot * be constructed */ private static HsqlSocketFactory newFactory(String implClass) throws Exception { Class clazz; Constructor ctor; Class[] ctorParm; Object[] ctorArg; Object factory; clazz = Class.forName(implClass); ctorParm = new Class[0]; // protected constructor ctor = clazz.getDeclaredConstructor(ctorParm); ctorArg = new Object[0]; try { factory = ctor.newInstance(ctorArg); } catch (InvocationTargetException e) { Throwable t = e.getTargetException(); throw (t instanceof Exception) ? ((Exception) t) : new RuntimeException( t.toString()); } return (HsqlSocketFactory) factory; } // -- } Other HSQLDB examples (source code examples)Here is a short list of links related to this HSQLDB HsqlSocketFactory.java source code file: |
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