Java tutorial
/* * Copyright 2012 The Netty Project * * The Netty Project 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. */ package io.netty.handler.codec.compression; import io.netty.buffer.ByteBuf; import io.netty.channel.ChannelFuture; import io.netty.channel.ChannelPromise; import io.netty.handler.codec.MessageToByteEncoder; /** * Compresses a {@link ByteBuf} using the deflate algorithm. */ public abstract class ZlibEncoder extends MessageToByteEncoder<ByteBuf> { protected ZlibEncoder() { super(false); } /** * Returns {@code true} if and only if the end of the compressed stream * has been reached. */ public abstract boolean isClosed(); /** * Close this {@link ZlibEncoder} and so finish the encoding. * * The returned {@link ChannelFuture} will be notified once the * operation completes. */ public abstract ChannelFuture close(); /** * Close this {@link ZlibEncoder} and so finish the encoding. * The given {@link ChannelFuture} will be notified once the operation * completes and will also be returned. */ public abstract ChannelFuture close(ChannelPromise promise); }