Question

我在Stellar上提到了文档。

然后我开始在Java send payment之后运行receiving payment和creating an account代码。

发送付款代码正在运行，但收到付款代码已被终止。我在下面提到过代码：

public class receivePayment {

public static void main(String args[]) {

    Server server = new Server("https://horizon-testnet.stellar.org");
    KeyPair account = KeyPair.fromAccountId("GC2BKLYOOYPDEFJKLKY6FNNRQMGFLVHJKQRGNSSRRGSMPGF32LHCQVGF");

    // Create an API call to query payments involving the account.
    PaymentsRequestBuilder paymentsRequest = server.payments().forAccount(account);

    // If some payments have already been handled, start the results from
    // the
    // last seen payment. (See below in `handlePayment` where it gets
    // saved.)
    /*
     * String lastToken = loadLastPagingToken(); if (lastToken != null) {
     * paymentsRequest.cursor(lastToken); }
     */

    // `stream` will send each recorded payment, one by one, then keep the
    // connection open and continue to send you new payments as they occur.
    paymentsRequest.stream(new EventListener<OperationResponse>() {
        @Override
        public void onEvent(OperationResponse payment) {
            // Record the paging token so we can start from here next time.
            // savePagingToken(payment.getPagingToken());

            // The payments stream includes both sent and received payments.
            // We only
            // want to process received payments here.
            if (payment instanceof PaymentOperationResponse) {
                if (((PaymentOperationResponse) payment).getTo().equals(account)) {
                    return;
                }

                String amount = ((PaymentOperationResponse) payment).getAmount();

                Asset asset = ((PaymentOperationResponse) payment).getAsset();
                String assetName;
                if (asset.equals(new AssetTypeNative())) {
                    assetName = "lumens";
                } else {
                    StringBuilder assetNameBuilder = new StringBuilder();
                    assetNameBuilder.append(((AssetTypeCreditAlphaNum) asset).getCode());
                    assetNameBuilder.append(":");
                    assetNameBuilder.append(((AssetTypeCreditAlphaNum) asset).getIssuer().getAccountId());
                    assetName = assetNameBuilder.toString();
                }

                StringBuilder output = new StringBuilder();
                output.append(amount);
                output.append(" ");
                output.append(assetName);
                output.append(" from ");
                output.append(((PaymentOperationResponse) payment).getFrom().getAccountId());
                System.out.println(output.toString());
            }

        }
    });
}

}

我不明白为什么会被终止。如果我从我的帐户URL检查余额，但向我显示发送 - 接收结果，但它没有在Eclipse中显示结果。

我还提到了下面的参考链接，并按照答案但仍然没有用。

Stellar payments query

任何人都可以告诉我如何运行此代码，该代码不断收到付款并在控制台上维护日志。？

Answer 1

问题是这是一个流服务，所以如果你只是在main方法中运行该服务，那么当它在main方法中运行时它将明显终止，并且范围将在外面，并且EventListener将无法执行。正如您所说的使用eclips，您可以做的一件事是运行try debug并在此Server server = new Server("https://horizon-testnet.stellar.org");行插入一个调试点，然后按F6逐行。调试时一旦到达程序的最后一行然后等待，不要运行。您将在控制台中看到数据。这样你就会明白程序是如何工作的。如果要快速运行它，请使用我在现有代码中添加的代码。我添加了两个选项。你可以使用任何一个。这将显示输出。

public class TestStellar2 {


      public static void main(String args[]) {

        Server server = new Server("https://horizon-testnet.stellar.org");
        KeyPair account = KeyPair.fromAccountId("GC2BKLYOOYPDEFJKLKY6FNNRQMGFLVHJKQRGNSSRRGSMPGF32LHCQVGF");

        PaymentsRequestBuilder paymentsRequest = server.payments().forAccount(account);


        paymentsRequest.stream(new EventListener <OperationResponse>(){
          @Override
          public void onEvent(OperationResponse payment) {

            if (payment instanceof PaymentOperationResponse) {
              if (((PaymentOperationResponse) payment).getTo().equals(account)) {
                return;
              }

              String amount = ((PaymentOperationResponse) payment).getAmount();

              Asset asset = ((PaymentOperationResponse) payment).getAsset();
              String assetName;
              if (asset.equals(new AssetTypeNative())) {
                assetName = "lumens";
              } else {
                StringBuilder assetNameBuilder = new StringBuilder();
                assetNameBuilder.append(((AssetTypeCreditAlphaNum) asset).getCode());
                assetNameBuilder.append(":");
                assetNameBuilder.append(((AssetTypeCreditAlphaNum) asset).getIssuer().getAccountId());
                assetName = assetNameBuilder.toString();
              }

              StringBuilder output = new StringBuilder();
              output.append(amount);
              output.append(" ");
              output.append(assetName);
              output.append(" from ");
              output.append(((PaymentOperationResponse) payment).getFrom().getAccountId());
              System.out.println(output.toString());
            }
          }
        }); 

        /**
         * option 1
         * 
         */
       /*try {
            System.in.read();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }*/

        /**
         * option 2
         */
        try {
            Thread.currentThread().join();
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

      }

    }

输出如下所示：

10.0000000 lumens from GC2BKLYOOYPDEFJKLKY6FNNRQMGFLVHJKQRGNSSRRGSMPGF32LHCQVGF many line like this

Stellar付款代码不适用于Java

1 个答案: