/*

 * 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.

 *

 * 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

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 */

/*

 *

 *

 * This unit test checks that closing the channel returned by

 * System.inheritedChannel closes the underlying network socket.

 *

 * The test launches the "echo service" with arguments to instruct the

 * service to close the channel after it receives a small message. The

 * service then delays/lingers for 15 seconds before shuting down. To

 * prove that the close works we check that we see EOF (meaning the

 * peer has closed the connection) in less than 15 seconds.

 */

import java.nio.ByteBuffer;

import java.nio.channels.SelectionKey;

import java.nio.channels.Selector;

import java.nio.channels.SocketChannel;

public class CloseTest {

    public static void main(String args[]) throws Exception {

        String msg = "HELLO";

        // Launch the service with arguments to tell it to close

        // the connection after reading 5 bytes ("HELLO"). After

        // closing the connection the service should hang around

        // for 15 seconds.

        String service_args[] = new String[2];

        service_args[0] = String.valueOf(msg.length());

        SocketChannel sc = Launcher.launchWithSocketChannel("EchoService", service_args);

        // send message - service will echo the message and close the connection.

        sc.write(ByteBuffer.wrap(msg.getBytes("UTF-8")));

        // read the reply (with timeout)

        ByteBuffer bb = ByteBuffer.allocateDirect(50);

        sc.configureBlocking(false);

        Selector sel = sc.provider().openSelector();

        SelectionKey sk = sc.register(sel, SelectionKey.OP_READ);

        for (;;) {

            long st = System.currentTimeMillis();

            sel.select(to);

            if (sk.isReadable()) {

                int n = sc.read(bb);

                // EOF

                if (n < 0) {

                    break;

                }

            }

            sel.selectedKeys().remove(sk);

            to -= System.currentTimeMillis() - st;

            if (to <= 0) {

                throw new RuntimeException("Timed out waiting for connection to close");

            }

        }

        sel.close();

        sc.close();

        // finally check that the reply length is okay

        bb.flip();

        if (bb.remaining() < msg.length()) {

            throw new RuntimeException("Premature EOF from echo service");

        }

        System.out.println("Test passed - service closed connection.");

    }

}