f45d75478f
Motivation: Adding an example that showcases Netty’s HTTP/2 codec and that is slightly more complex than the existing hello-world example. It is based on the Gopher tiles example available here: https://http2.golang.org/gophertiles?latency=0 Modifications: Moved current http2 example to http2/helloworld. Added http2 tiles example under http2/tiles. Result: A Netty tiles example is available.
64 lines
1.9 KiB
Java
64 lines
1.9 KiB
Java
/*
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* Copyright 2015 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.example.http2.tiles;
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import static io.netty.buffer.Unpooled.unmodifiableBuffer;
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import static io.netty.buffer.Unpooled.unreleasableBuffer;
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import static io.netty.example.http2.Http2ExampleUtil.toByteBuf;
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import io.netty.buffer.ByteBuf;
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import java.io.IOException;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* Caches the images to avoid reading them every time from the disk.
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*/
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public final class ImageCache {
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public static ImageCache INSTANCE = new ImageCache();
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private final Map<String, ByteBuf> imageBank = new HashMap<String, ByteBuf>(200);
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private ImageCache() {
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init();
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}
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public static String name(int x, int y) {
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return "tile-" + y + "-" + x + ".jpeg";
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}
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public ByteBuf image(int x, int y) {
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return imageBank.get(name(x, y));
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}
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private void init() {
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for (int y = 0; y < 10; y++) {
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for (int x = 0; x < 20; x++) {
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try {
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String name = name(x, y);
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ByteBuf fileBytes = unreleasableBuffer(unmodifiableBuffer(toByteBuf(getClass()
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.getResourceAsStream(name))));
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imageBank.put(name, fileBytes);
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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}
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}
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