【Java】LockAdapter（Lock 简单模板封装）

ReentrantLock 简单模板封装

import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import java.util.function.Supplier;

/**
 * A simple adapter mode of {@link java.util.concurrent.locks.Lock}
 *
 * @since 1.8
 */
public final class LockAdapter {

    private static Lock _lock_ = null;

    public LockAdapter() {
        this(new ReentrantLock());
    }

    public LockAdapter (Lock lock) {
        _lock_ = lock;
    }

    // --------------------------------------------------------------------------------------------

    public void lock(Runnable runnable) {
        if (runnable == null) { return; }
        _lock_.lock();
        try {
            runnable.run();
        } finally {
            _lock_.unlock();
        }
    }

    public <R> R lock(Supplier<R> supplier) {
        if (supplier == null) { return null; }
        _lock_.lock();
        try {
            return supplier.get();
        } finally {
            _lock_.unlock();
        }
    }

}

ReentrantReadWriteLock 简单模板封装

import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import java.util.function.Supplier;

/**
 * A simple adapter mode of {@link java.util.concurrent.locks.ReadWriteLock}
 *
 * @since 1.8
 */
public final class ReadWriteLockAdapter {

    private static Lock _rl_ = null;
    private static Lock _wl_ = null;

    public ReadWriteLockAdapter() {
        this(new ReentrantReadWriteLock());
    }

    public ReadWriteLockAdapter(ReadWriteLock rwl) {
        _rl_ = rwl.readLock();
        _wl_ = rwl.writeLock();
    }

    // --------------------------------------------------------------------------------------------

    public void readLock(Runnable runnable) {
        if (runnable == null) { return; }
        _rl_.lock();
        try {
            runnable.run();
        } finally {
            _rl_.unlock();
        }
    }

    public <R> R readLock(Supplier<R> supplier) {
        if (supplier == null) { return null; }
        _rl_.lock();
        try {
            return supplier.get();
        } finally {
            _rl_.unlock();
        }
    }   

    // --------------------------------------------------------------------------------------------

    public void writeLock(Runnable runnable) {
        if (runnable == null) { return; }
        _wl_.lock();
        try {
            runnable.run();
        } finally {
            _wl_.unlock();
        }
    }

    public <R> R writeLock(Supplier<R> supplier) {
        if (supplier == null) { return null; }
        _wl_.lock();
        try {
            return supplier.get();
        } finally {
            _wl_.unlock();
        }
    }

}