Question

Hello其他程序员，

我目前正致力于从为我们公司工作的用户检索信息

public class SCD_Checker {
    private final ExecutorService service = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
    private String mail = "";
    private String stat;


    private Connection conn = new Connection();

    SCD_Checker() {
        conn.setProvider("ADsDSOObject");
        conn.Open("Active Directory Provider", "", "", 0);
    }

    private void ldap_call(String email) {
        this.mail = email;
        Command objCmd = new Command();
        Recordset RS = new Recordset();
        objCmd.setActiveConnection(conn);
        String searchKeyword = "contractstatus";
        objCmd.setCommandText("XXX:LDAP_CONN)(mail=" + email + "));" + searchKeyword + ";subTree");

        RS = objCmd.Execute();
        if (RS.getBOF()) this.stat = "Not in SCD";
        else {
            RS.MoveFirst();
            Variant value = RS.getFields().getItem(0).getValue();

            if (value.getString().equals("R")) this.stat = "Retired";
            else if (value.getString().equals("A")) this.stat = "Active";
            else if (value.getString().equals("null")) this.stat = "Not in SCD";
        }
    }

    public void submit_task(String email) {
        this.service.submit(() -> ldap_call(email));
    }

    public String getMail() {
        return this.mail;
    }

    public String getStat() {
        return this.stat;
    }

    public void shutdown_and_close() throws InterruptedException {
        this.service.shutdown();
        this.service.awaitTermination(1, TimeUnit.MINUTES);
        this.conn.Close();
    }
}

这是我到目前为止工作的代码，问题是我似乎构建错误，因为如果我尝试使用 stat 变量创建一个Future，我无法保存在stat变量中从Variant value = RS.getFields().getItem(0).getValue();返回的值。将它作为String变量保留时，我可以轻松地将结果写入csv文件。但我需要返回一个带有电子邮件的字符串+状态。

我的架构中似乎有些错误，但我似乎无法知道如何修复当前程序以正确返回值，因为没有任何函数返回值。

有没有人有想法，我需要如何改变架构？

就我看到的类似问题而言，我可能会使用Callable，但无法通过 ldap_call（）函数获取值

Answer 1

我认为你需要调整你的架构。

如果要从Java函数返回多个值，则可以创建一个汇编类，在这里你可以创建WorkerDTO 包含统计和电子邮件：

public class WorkerDTO {

    private String email;
    private String stat;

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getStat() {
        return stat;
    }

    public void setStat(String stat) {
        this.stat = stat;
    }
}

你应该提取一个接受电子邮件的Callable课程返回WorkerDTO：

public class CheckStatusCallable implements Callable<WorkerDTO> {

    private Connection connection;
    private String email;

    public CheckStatusCallable(Connection connection, String email) {
        this.connection = connection;
        this.email = email;
    }

    @Override
    public WorkerDTO call() throws Exception {
        Command objCmd = new Command();
        Recordset RS = new Recordset();
        objCmd.setActiveConnection(conn);
        String searchKeyword = "contractstatus";
        objCmd.setCommandText("XXX:LDAP_CONN)(mail=" + this.email + "));" + searchKeyword + ";subTree");

        RS = objCmd.Execute();
        WorkerDTO workerDTO = new WorkerDTO();
        workerDTO.setEmail(this.email);
        workerDTO.setEmail(e);
        if (RS.getBOF()) workerDTO.setStat("Not in SCD");
        else {
            RS.MoveFirst();
            Variant value = RS.getFields().getItem(0).getValue();

            if (value.getString().equals("R")) workerDTO.setStat("Retired");
            else if (value.getString().equals("A")) workerDTO.setStat("Active");
            else if (value.getString().equals("null")) workerDTO.setStat("Not in SCD");
        }
        return workerDTO;
    }
}

在SCD_Checker中，只需使用CheckStatusCallable创建新任务并将其提交给遗嘱执行人。

public class SCD_Checker {
    private final ExecutorService service = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());

    private Connection conn = new Connection();

    SCD_Checker() {
        conn.setProvider("ADsDSOObject");
        conn.Open("Active Directory Provider", "", "", 0);
    }

    public Future<WorkerDTO> submit_task(String email) {
        return this.service.submit(new CheckStatusCallable(conn, email));
    }

    public void shutdown_and_close() throws InterruptedException {
        this.service.shutdown();
        this.service.awaitTermination(1, TimeUnit.MINUTES);
        this.conn.Close();
    }
}

测试是否适用于：

public class Test {

    public static void main(String[] args) {
        SCD_Checker checker = new SCD_Checker();
        Future<WorkerDTO> workerDTOFuture = checker.submit_task("test@test.com");
        WorkerDTO workerDTO = workerDTOFuture.get();
        String email = workerDTO.getEmail();
        String stat = workerDTO.getStat();
    }
}

ExecutorService的未来返回值

1 个答案: