/*

 * Copyright (c) 2005, 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 sun.tools.attach;

import com.sun.tools.attach.VirtualMachine;

import com.sun.tools.attach.VirtualMachineDescriptor;

import com.sun.tools.attach.AttachNotSupportedException;

import java.io.IOException;

/*

 * An AttachProvider implementation for Linux that uses a UNIX domain

 * socket.

 */

public class AttachProviderImpl extends HotSpotAttachProvider {

    public AttachProviderImpl() {

    }

    public String name() {

        return "sun";

    }

    public String type() {

        return "socket";

    }

    public VirtualMachine attachVirtualMachine(String vmid)

        throws AttachNotSupportedException, IOException

    {

        checkAttachPermission();

        // AttachNotSupportedException will be thrown if the target VM can be determined

        // to be not attachable.

        testAttachable(vmid);

        return new VirtualMachineImpl(this, vmid);

    }

    public VirtualMachine attachVirtualMachine(VirtualMachineDescriptor vmd)

        throws AttachNotSupportedException, IOException

    {

        if (vmd.provider() != this) {

            throw new AttachNotSupportedException("provider mismatch");

        }

        // To avoid re-checking if the VM if attachable, we check if the descriptor

        // is for a hotspot VM - these descriptors are created by the listVirtualMachines

        // implementation which only returns a list of attachable VMs.

        if (vmd instanceof HotSpotVirtualMachineDescriptor) {

            assert ((HotSpotVirtualMachineDescriptor)vmd).isAttachable();

            checkAttachPermission();

            return new VirtualMachineImpl(this, vmd.id());

        } else {

            return attachVirtualMachine(vmd.id());

        }

    }

}