4875a2aad4
Motivation: The `AsciiString#toString` method calculate string value and cache it into field. If an `AsciiString` created from the `String` value, we can avoid rebuilding strings if we cache them immediately when creating `AsciiString`. It would be useful for constants strings, which already stored in the JVMs string table, or in cases where an unavoidable `#toString `method call is assumed. Modifications: - Add new static method `AsciiString#cache(String)` which save string value into cache field. - Apply a "benign" data race in the `#hashCode` and `#toString` methods. Result: Less memory usage in some `AsciiString` use cases.
70 lines
1.9 KiB
Java
70 lines
1.9 KiB
Java
/*
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* Copyright 2017 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.handler.codec.http.websocketx;
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import io.netty.util.AsciiString;
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/**
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* Defines the common schemes used for the WebSocket protocol as defined by
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* <a href="https://tools.ietf.org/html/rfc6455">rfc6455</a>.
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*/
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public final class WebSocketScheme {
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/**
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* Scheme for non-secure WebSocket connection.
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*/
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public static final WebSocketScheme WS = new WebSocketScheme(80, "ws");
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/**
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* Scheme for secure WebSocket connection.
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*/
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public static final WebSocketScheme WSS = new WebSocketScheme(443, "wss");
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private final int port;
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private final AsciiString name;
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private WebSocketScheme(int port, String name) {
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this.port = port;
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this.name = AsciiString.cached(name);
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}
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public AsciiString name() {
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return name;
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}
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public int port() {
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return port;
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}
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@Override
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public boolean equals(Object o) {
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if (!(o instanceof WebSocketScheme)) {
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return false;
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}
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WebSocketScheme other = (WebSocketScheme) o;
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return other.port() == port && other.name().equals(name);
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}
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@Override
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public int hashCode() {
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return port * 31 + name.hashCode();
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}
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@Override
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public String toString() {
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return name.toString();
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}
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}
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