JDK8/Java8源码在线阅读

/*
 * Copyright (c) 1998, 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.tools.jdi;

import com.sun.jdi.VirtualMachine;
import com.sun.jdi.connect.*;
import com.sun.jdi.connect.spi.*;
import java.util.Map;
import java.util.HashMap;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;

/*
 * An AttachingConnector that uses the SocketTransportService
 */
public class SocketAttachingConnector extends GenericAttachingConnector {

    static final String ARG_PORT = "port";
    static final String ARG_HOST = "hostname";

    public SocketAttachingConnector() {
        super(new SocketTransportService());

        String defaultHostName;
        try {
            defaultHostName = InetAddress.getLocalHost().getHostName();
        } catch (UnknownHostException e) {
            defaultHostName = "";
        }

        addStringArgument(
            ARG_HOST,
            getString("socket_attaching.host.label"),
            getString("socket_attaching.host"),
            defaultHostName,
            false);

        addIntegerArgument(
            ARG_PORT,
            getString("socket_attaching.port.label"),
            getString("socket_attaching.port"),
            "",
            true,
            0, Integer.MAX_VALUE);

        transport = new Transport() {
            public String name() {
                return "dt_socket";     // for compatibility reasons
            }
        };

    }

    /*
     * Create an "address" from the hostname and port connector
     * arguments and attach to the target VM.
     */
    public VirtualMachine
        attach(Map<String,? extends Connector.Argument> arguments)
        throws IOException, IllegalConnectorArgumentsException
    {
        String host = argument(ARG_HOST, arguments).value();
        if (host.length() > 0) {

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