| /* |
| * ==================================================================== |
| * 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 |
| * |
| * http://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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| |
| package org.apache.hc.core5.http.nio; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.List; |
| |
| import org.apache.hc.core5.annotation.Contract; |
| import org.apache.hc.core5.annotation.ThreadingBehavior; |
| import org.apache.hc.core5.http.Header; |
| |
| /** |
| * Abstract byte stream channel |
| * <p> |
| * Implementations are expected to be thread-safe. |
| * </p> |
| * |
| * @since 5.0 |
| */ |
| @Contract(threading = ThreadingBehavior.SAFE) |
| public interface DataStreamChannel extends StreamChannel<ByteBuffer> { |
| |
| /** |
| * Signals intent by the data producer to produce more data. |
| * Once the channel is able to accept data its handler is expected |
| * to trigger an event to notify the data producer. |
| */ |
| void requestOutput(); |
| |
| /** |
| * Writes data from the buffer through this channel into the underlying byte stream. |
| * If the underlying byte stream is temporarily unable to accept more data |
| * it can return zero to indicate that no data could be written to the data |
| * stream. The data producer can choose to call {@link #requestOutput()} |
| * to signal its intent to produce more data. |
| * |
| * @param src source of data |
| * |
| * @return The number of bytes written, possibly zero |
| */ |
| @Override |
| int write(ByteBuffer src) throws IOException; |
| |
| /** |
| * Terminates the underlying data stream and optionally writes |
| * a closing sequence with the given trailers. |
| * <p> |
| * Please note that some data streams may not support trailers |
| * and may silently ignore the trailers parameter. |
| * </p> |
| */ |
| void endStream(List<? extends Header> trailers) throws IOException; |
| |
| } |