Verify that synchronous and asynchronous service calls are logging invocation confirmation messages to console output, as shown in Figure 19.

验证同步和异步服务调用正在将调用确认消息记录到控制台输出，如图19所示。

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This is especially important when asynchronous invocation is used where the calling task has to look for the output of the called task appearing at a particular location to continue further.

当使用了异步调用，而调用的任务需要查找所调用任务在特定位置生成的输出才能够继续后续操作时，这种方法是特别重要的。

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After the IDoc is sent out, the XML contents of the output business object is returned, which contains the transaction ID for this ALE asynchronous request, as shown in Figure 43.

发送IDoc之后，返回输出业务对象的XML内容，其中包含这个ale异步请求的事务id，见图43。

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