src/main/java/org/apache/commons/net/discard/DiscardTCPClient.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.commons.net.discard;

import java.io.OutputStream;

import org.apache.commons.net.SocketClient;

/**
 * The DiscardTCPClient class is a TCP implementation of a client for the Discard protocol described in RFC 863. To use the class, merely establish a connection
 * with {@link org.apache.commons.net.SocketClient#connect connect} and call {@link #getOutputStream getOutputStream()} to retrieve the discard output stream.
 * Don't close the output stream when you're done writing to it. Rather, call {@link org.apache.commons.net.SocketClient#disconnect disconnect} to clean up
 * properly.
 *
 * @see DiscardUDPClient
 */
public class DiscardTCPClient extends SocketClient {

    /** The default discard port. It is set to 9 according to RFC 863. */
    public static final int DEFAULT_PORT = 9;

    /**
     * The default DiscardTCPClient constructor. It merely sets the default port to {@code DEFAULT_PORT}.
     */
    public DiscardTCPClient() {
        setDefaultPort(DEFAULT_PORT);
    }

    /**
     * Gets an OutputStream through which you may write data to the server. You should NOT close the OutputStream when you're finished reading from it.
     * Rather, you should call {@link org.apache.commons.net.SocketClient#disconnect disconnect} to clean up properly.
     *
     * @return An OutputStream through which you can write data to the server.
     */
    public OutputStream getOutputStream() {
        return _output_;
    }
}