java实现golang类似的chan

java版本的CSP操作

public class Chan<T> {
    private T message;

    private boolean empty = true;

    public synchronized T take() {
        while (empty) {
            try {
                wait();
            } catch (InterruptedException e) {
            }
        }
        empty = true;
        notifyAll();
        return message;
    }

    public synchronized void put(T message) {
        while (!empty) {
            try {
                wait();
            } catch (InterruptedException e) {
            }
        }
        empty = false;
        this.message = message;
        notifyAll();
    }
}

基本的csp操作上面就可以了，但是如果想实现golang的select模型，就要对消息进行改造一下：

class ChanMessage<T> {
    private String type;
    private T data;

    public ChanMessage(String type, T data) {
        this.type = type;
        this.data = data;
    }


    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }


}

public class Chan<T extends ChanMessage> {
    private T message;

    private boolean empty = true;

    public synchronized T take() {
        while (empty) {
            try {
                wait();
            } catch (InterruptedException e) {
            }
        }
        empty = true;
        notifyAll();
        return message;
    }

    public synchronized void put(T message) {
        while (!empty) {
            try {
                wait();
            } catch (InterruptedException e) {
            }
        }
        empty = false;
        this.message = message;
        notifyAll();
    }


    public static void main(String[] args) {

        Chan<ChanMessage<Integer>> chanMessageChan = new Chan<>();


        new Thread(() -> {
            chanMessageChan.put(new ChanMessage<>("timeout", new Integer(1)));
        }).start();


        new Thread(() -> {
            ChanMessage<Integer> chanMessage = chanMessageChan.take();
            switch (chanMessage.getType()) {
                case "timeout":
                    System.out.println(chanMessage.getData());
                    break;
                default:
                    break;

            }
        }).start();
    }
}

至此就用 java 实现了golang的select操作，写完这段代码有种打通了任督二脉的感觉，语言不再是障碍