| /* |
| * ==================================================================== |
| * 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.io; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| import org.apache.hc.core5.util.CharArrayBuffer; |
| |
| /** |
| * Session output buffer for blocking HTTP/1.1 connections. |
| * <p> |
| * This interface facilitates intermediate buffering of output data streamed out |
| * to an output stream and provides provides methods for writing lines of text. |
| * |
| * @since 4.0 |
| */ |
| public interface SessionOutputBuffer { |
| |
| /** |
| * Return length data stored in the buffer |
| * |
| * @return data length |
| */ |
| int length(); |
| |
| /** |
| * Returns total capacity of the buffer |
| * |
| * @return total capacity |
| */ |
| int capacity(); |
| |
| /** |
| * Returns available space in the buffer. |
| * |
| * @return available space. |
| */ |
| int available(); |
| |
| /** |
| * Writes {@code len} bytes from the specified byte array |
| * starting at offset {@code off} to this session buffer. |
| * <p> |
| * If {@code off} is negative, or {@code len} is negative, or |
| * {@code off+len} is greater than the length of the array |
| * {@code b}, then an {@code IndexOutOfBoundsException} is thrown. |
| * |
| * @param b the data. |
| * @param off the start offset in the data. |
| * @param len the number of bytes to write. |
| * @throws IOException if an I/O error occurs. |
| */ |
| void write(byte[] b, int off, int len, OutputStream outputStream) throws IOException; |
| |
| /** |
| * Writes {@code b.length} bytes from the specified byte array |
| * to this session buffer. |
| * |
| * @param b the data. |
| * @throws IOException if an I/O error occurs. |
| */ |
| void write(byte[] b, OutputStream outputStream) throws IOException; |
| |
| /** |
| * Writes the specified byte to this session buffer. |
| * |
| * @param b the {@code byte}. |
| * @throws IOException if an I/O error occurs. |
| */ |
| void write(int b, OutputStream outputStream) throws IOException; |
| |
| /** |
| * Writes characters from the specified char array followed by a line |
| * delimiter to this session buffer. |
| * <p> |
| * The choice of a char encoding and line delimiter sequence is up to the |
| * specific implementations of this interface. |
| * |
| * @param buffer the buffer containing chars of the line. |
| * @throws IOException if an I/O error occurs. |
| */ |
| void writeLine(CharArrayBuffer buffer, OutputStream outputStream) throws IOException; |
| |
| /** |
| * Flushes this session buffer and forces any buffered output bytes |
| * to be written out. The general contract of {@code flush} is |
| * that calling it is an indication that, if any bytes previously |
| * written have been buffered by the implementation of the output |
| * stream, such bytes should immediately be written to their |
| * intended destination. |
| * |
| * @throws IOException if an I/O error occurs. |
| */ |
| void flush(OutputStream outputStream) throws IOException; |
| |
| /** |
| * Returns {@link HttpTransportMetrics} for this session buffer. |
| * |
| * @return transport metrics. |
| */ |
| HttpTransportMetrics getMetrics(); |
| |
| } |