How to guarantee java file is created before call a function

Asked Oct 14 '19 at 20:27

Active Oct 14 '19 at 20:27

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I am using JavaPoet to generate code, here is the core part of my code snippet:

...
TypeSpec typeSpec = createTypeSpec();
JavaFile javaFile = JavaFile.builder(myPackage, typeSpec).build();

// write to file
javaFile.writeTo(filer);

// I want to call this doTask() only after the java file is written on hard disk. How to guarantee that?
doTask();

It works fine. The java file is generated on hard disk. Now I have a new requirement, I need to do some work after java file is generated on hard disk, that's call the doTask() in above code snippet. But how can I guarantee the java file is generated then start the doTask()?

Please note, when generating the java file, the corresponding packages are also created at run time. So, the directory under which the java file is located is not created at compile time.

asked Oct 14 '19 at 20:27

user842225

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Is it not currently waiting for it to finish writing? The javadoc gives no indication that `writeFile` is asynchronous. – zero298 Oct 14 '19 at 20:40
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Why do you think it is not written at that point? – Antoniossss Oct 14 '19 at 20:55
Because I have a code to move the file to another location in `doTask()`, sometimes it works sometimes the file does not exist. – user842225 Oct 15 '19 at 05:15

How to guarantee java file is created before call a function

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