Writing messages generated during execution to a file.

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Posted on by Mav

Hello,

Please suggest how can i write all info, warning & error messages generated while running a class to text file like log file.

I was thinking if all the messages are written to infolog , if that be the case then i should extract them from infolog & write to a file using IO, is my understanding correct?

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Mav on at

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Hello experts,

Would really appreciate any response on this issue.

Thanks

Mav

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Sergei Minozhenko 23,093 on at

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Hi Mav,

In AX2012 i used class AifInfoLog to get full infolog.

I wrapped all logic part to try-catch statement to be sure that unhandled error will not cause any troubles. And after try-catch i read information from AifInfoLog class and stored it to the field, but you can do whatever you want.

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Martin Dráb 237,807 Most Valuable Professional on at

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AX 2012 already has the ability to save infolog messages to a trace file. See the documentation; I also covered some extra details in my blog post Instrumentation and tracing.

If tracing doesn't work for you, you can implement custom logic in Info.add().

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Mav on at

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@Sergei Minozhenkoi wrote the following, however no file is getting generated i think the code flow is like 1>Found error 2>Go to catch block 3>Terminate the execution & hence the code written after catch block for reading infolog & writing to file is never executed. Please suggest. Shared below is my code.

@Martin Thanks for your suggestion, for now i m looking for really simple solution which would read all messages generated during my class execution & then write to a file, however really appreciate your response & will strive to move to this level of Instrumentation and tracing after i complete my basic stuff.

protected void run() { //Read logs & store in txt AifInfoLog lAifInfoLog = new AifInfoLog(); TextIo txIoRead, txIoWrite; FileIOPermission fioPermission; container containFromRead; int xx,iConLength; str sTempPath,sFileName = filepath,sOneRecord; ; //END Read logs & store in txt try { some business logic throw Global::error(strFmt("Filetype %1 is not supported",fileType)); } catch (Exception::Error) { throw Global::error(strfmt("Caught 'Exception::Error'."); } // BEGIN CODE FOR writing to a txt file sTempPath = filepath ;//WINAPI::getTempPath(); fioPermission = new FileIOPermission (sTempPath sFileName ,"RW"); fioPermission.assert(); if (WINAPI::fileExists(sFileName)) { WINAPI::deleteFile(sTempPath sFileName); } containFromRead = lAifInfoLog.getInfoLogData(); while (containFromRead) { sOneRecord = ""; iConLength = conLen(containFromRead); // Loop through the token in the current record. for (xx=1; xx <= iConLength; xx ) { if (xx > 1) sOneRecord = " "; sOneRecord = conPeek(containFromRead ,xx); } info(sOneRecord); // Read the next record from the container. containFromRead = txIoRead.read(); } CodeAccessPermission::revertAssert(); info("Test INFO"); // END CODE FOR writing to a txt file } // END run method

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Martin Dráb 237,807 Most Valuable Professional on at

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You're right, your code won't be executed, because an exception is thrown before it's reached. You would have to call your logic from the catch block, before interrupting execution by throwing an exception.

Note that that it assumes that the whole thing isn't inside a transaction. If it was, your catch clause would be completely ignored.

By the way, you don't have to prefix error() with Global:: - just throw error() does the same thing.

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Mav on at

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As only using error does not display it in infolog as per this article, i thought of prefixing it with global.

docs.microsoft.com/.../exception-handling-with-try-and-catch-keywords

Surely there is something wrong with my code apart from placement itself.

Can you pls suggest where to place it & some sample code which would read details from infolog & write to txt file, please note the log file should be generated for each execution irrespective of whether there were errors or only info & warnings.

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Martin Dráb 237,807 Most Valuable Professional on at

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If you don't trust me that error() and Global::error() calls the same thing, put a breakpoint to error() method in Global class and then call error(). You'll see it for yourself. Even the link you mentioned confirms what I said - it reads: "In X++ code, the static methods on the Global class can be called without the Global:: prefix. For example, the Global::error method can be called simply as error("My message.");". Note that s a sad fact is that code examples in AX documentation are usually pretty bad.

If you want to read from infolog at the end of a process, instead of collection messages at they occur, you can use SysInfologEnumerator class (an example).

As you see, there are multiple options, therefore you should think carefully about your requirements to be able to pick the most suitable one.

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Mav on at

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@Martin I trust you , always have :-).

Coming to my issue , so what i did is created a method writeMessage2File(FilePath _filepath) and wrote this code, i am calling this method in every try & catch , in catch calling it before throw error line.

Objective of code is to collect all type of messages during execution & then write a file with all messages, warning, errors faced during execution.

So using AifInfoLog.getInfoLogData() i am trying to collect all infolog data in a container & then using TextIo, writing the container contents to a txt file.

Unfortunately It errors out at this line txIoWrite.write(conAllMessages); Error message is TextIo object not initialized.

protected void writeMessages2File(FilePath _filepath) { //Read logs & store in txt AifInfoLog lAifInfoLog = new AifInfoLog(); TextIo txIoRead, txIoWrite; FileIOPermission fioPermission; container conAllMessages; int xx,iConLength; str sTempPath,sFileName = _filepath,sOneRecord; ; //END Read logs & store in txt conAllMessages = lAifInfoLog.getInfoLogData(); //containFromRead = Binary::constructFromContainer(containFromRead); sTempPath = _filepath ;//WINAPI::getTempPath(); fioPermission = new FileIOPermission (sTempPath sFileName ,"RW"); fioPermission.assert(); if (WINAPI::fileExists(sFileName)) { WINAPI::deleteFile(sTempPath sFileName); } // Open a test file for writing. // "W" mode overwrites existing content, or creates the file. txIoWrite = new TextIo( sTempPath sFileName ,"W"); // Write records to the file. txIoWrite.write("conAllMessages"); // Close the test file. txIoWrite = null; CodeAccessPermission::revertAssert(); info("Success");

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Sergei Minozhenko 23,093 on at

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Hi Mav,

Check where your code is executed? Probably you expect it to be executed on the client, but the code is executed on the server.

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Mav on at

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Hi

Can you please suggest where do i need to check this & make changes.

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