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The Async Http Client (AHC) classes.

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/*
 *    Copyright (c) 2017-2023 AsyncHttpClient Project. All rights reserved.
 *
 *    Licensed 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 org.asynchttpclient.util;

public class StringBuilderPool {

    public static final StringBuilderPool DEFAULT = new StringBuilderPool();

    private final ThreadLocal pool = ThreadLocal.withInitial(() -> new StringBuilder(512));

    /**
     * BEWARE: MUSTN'T APPEND TO ITSELF!
     *
     * @return a pooled StringBuilder
     */
    public StringBuilder stringBuilder() {
        StringBuilder sb = pool.get();
        sb.setLength(0);
        return sb;
    }
}