com.github.phantomthief.scope.MyThreadLocalFactory Maven / Gradle / Ivy

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package com.github.phantomthief.scope;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author w.vela
 * Created on 2019-07-03.
 */
class MyThreadLocalFactory {

    private static final Logger logger = LoggerFactory.getLogger(MyThreadLocalFactory.class);

    static final String USE_FAST_THREAD_LOCAL = "USE_FAST_THREAD_LOCAL";

    static  SubstituteThreadLocal create() {
        MyThreadLocal real = null;
        if (Boolean.getBoolean(USE_FAST_THREAD_LOCAL)) {
            try {
                NettyFastThreadLocal nettyFastThreadLocal = new NettyFastThreadLocal<>();
                logger.info("using fast thread local as scope implements.");
                real = nettyFastThreadLocal;
            } catch (Error e) {
                logger.warn("cannot use fast thread local as scope implements.");
            }
        }
        // TODO auto adaptive thread local between jdk thread local and netty fast thread local?
        if (real == null) {
            real = new JdkThreadLocal<>();
        }
        return new SubstituteThreadLocal<>(real);
    }
}