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.
93 lines
3.3 KiB
Java
93 lines
3.3 KiB
Java
/*
|
|
* Copyright 2013 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.spdy;
|
|
|
|
import io.netty.handler.codec.Headers;
|
|
import io.netty.util.AsciiString;
|
|
|
|
import java.util.Iterator;
|
|
import java.util.List;
|
|
import java.util.Map.Entry;
|
|
|
|
/**
|
|
* Provides the constants for the standard SPDY HTTP header names and commonly
|
|
* used utility methods that access a {@link SpdyHeadersFrame}.
|
|
*/
|
|
public interface SpdyHeaders extends Headers<CharSequence, CharSequence, SpdyHeaders> {
|
|
|
|
/**
|
|
* SPDY HTTP header names
|
|
*/
|
|
final class HttpNames {
|
|
/**
|
|
* {@code ":host"}
|
|
*/
|
|
public static final AsciiString HOST = AsciiString.cached(":host");
|
|
/**
|
|
* {@code ":method"}
|
|
*/
|
|
public static final AsciiString METHOD = AsciiString.cached(":method");
|
|
/**
|
|
* {@code ":path"}
|
|
*/
|
|
public static final AsciiString PATH = AsciiString.cached(":path");
|
|
/**
|
|
* {@code ":scheme"}
|
|
*/
|
|
public static final AsciiString SCHEME = AsciiString.cached(":scheme");
|
|
/**
|
|
* {@code ":status"}
|
|
*/
|
|
public static final AsciiString STATUS = AsciiString.cached(":status");
|
|
/**
|
|
* {@code ":version"}
|
|
*/
|
|
public static final AsciiString VERSION = AsciiString.cached(":version");
|
|
|
|
private HttpNames() { }
|
|
}
|
|
|
|
/**
|
|
* {@link Headers#get(Object)} and convert the result to a {@link String}.
|
|
* @param name the name of the header to retrieve
|
|
* @return the first header value if the header is found. {@code null} if there's no such header.
|
|
*/
|
|
String getAsString(CharSequence name);
|
|
|
|
/**
|
|
* {@link Headers#getAll(Object)} and convert each element of {@link List} to a {@link String}.
|
|
* @param name the name of the header to retrieve
|
|
* @return a {@link List} of header values or an empty {@link List} if no values are found.
|
|
*/
|
|
List<String> getAllAsString(CharSequence name);
|
|
|
|
/**
|
|
* {@link #iterator()} that converts each {@link Entry}'s key and value to a {@link String}.
|
|
*/
|
|
Iterator<Entry<String, String>> iteratorAsString();
|
|
|
|
/**
|
|
* Returns {@code true} if a header with the {@code name} and {@code value} exists, {@code false} otherwise.
|
|
* <p>
|
|
* If {@code ignoreCase} is {@code true} then a case insensitive compare is done on the value.
|
|
* @param name the name of the header to find
|
|
* @param value the value of the header to find
|
|
* @param ignoreCase {@code true} then a case insensitive compare is run to compare values.
|
|
* otherwise a case sensitive compare is run to compare values.
|
|
*/
|
|
boolean contains(CharSequence name, CharSequence value, boolean ignoreCase);
|
|
}
|