java - 从 threadExecutor 返回值

Question

如何访问固定 threadExecutor 中的 getOptimizedMol() 方法？当每个优化器线程完成时，我需要获得返回分子吗？

import chemaxon.marvin.calculations.ConformerPlugin;
import chemaxon.marvin.plugin.PluginException;
import chemaxon.struc.Molecule;

public class Optimizer3D implements Runnable {


    private Molecule mol3D;
    private Molecule mol2D;

    Optimizer3D(Molecule mol2D_)
    {
       this.mol2D = mol2D_; 
    }

    @Override
    public void run() {
        mol3D = chemAxonOptimizer();
    }

    private Molecule chemAxonOptimizer()
    {
        //optimize molecule code not shown
        return molecule;

    }


    public Molecule getOptimizedMol()
    {
        return mol3D;
    }
}

Answer 1

一种简单的技术是将某种 JobListener 添加到您的可运行文件中：

public class Optimizer3D implements Runnable {

    public static interface JobListener {
         public void onJobFinished(Optimizer3D job);
    }

    private Molecule mol3D;
    private Molecule mol2D;
    private JobListener jobListener;
    Optimizer3D(Molecule mol2D_, JobListener listener)
    {
       this.mol2D = mol2D_; 
       this.jobListener = listener;
    }

    @Override
    public void run() {
        mol3D = chemAxonOptimizer();
        if (jobListener!=null) {
            jobListener.onJobFinished(this);
        }
    }

    private Molecule chemAxonOptimizer()
    {
        //optimize molecule code not shown
        return molecule;

    }


    public Molecule getOptimizedMol()
    {
        return mol3D;
    }
}

Answer 2

你需要 aCallable而不是 a Runnable。Callable返回您的结果。

您可以按以下方式获取它：

Future<YourExpectedResult> future = executor.submit(new YourCallable());
YourExpectedResult result = future.get();

Answer 3

使用可调用：

public class Optimizer3D implements Callable<Molecule>{
    private Molecule mol3D;
    private Molecule mol2D;

    Optimizer3D(Molecule mol2D_)
    {
       this.mol2D = mol2D_; 
    }

    @Override
    public Molecule call() {
        mol3D = chemAxonOptimizer();
        return getOptimizedMol();
    }

    private Molecule chemAxonOptimizer()
    {
        //optimize molecule code not shown
        return molecule;

    }


    private Molecule getOptimizedMol()
    {
        return mol3D;
    }
}

然后从你的执行人那里：

Future<Molecule > future = executor.submit(yourTask);
Molecule  yourValue = future.get();