Synchronous writes using FileAdapter

Hi all,
I'm new to this SOA and BPEL stuff so I'm probably missing something obvious.
I'm writing out a file using a File adapter. This works fine.
The problem is when calling the invoke it invokes the FileAdapter as an async process. After the file is written there is a second(non soa/bpel) background process that is run to do some other processing on the file. However, with it being asynchronous we run into a situation where the second process can begin processing a file without it being completely written out yet.
How do we go about preventing this situation or at the very least is there a way to make the file adapter invoke synchronous?
Thanks!

there is a way to activate the processing of a file using a trigger file;
you should create the trigger file only after completion of the creation of the main file
consumption of the main file is activated by the trigger file
hope it helps

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Im looking for help to find out what is correct way to determine when process doing synchronous writes to files.
As much as I understand synchronous writes happens when you open file with O_SYNC and O_DSYNC and perform write call.
I have created small C test with O_SYNC:
write_sync.c
int main()
srand ( time(NULL) );
char *filename = "test.txt";
char buf[4];
sprintf(buf,"%d",rand());
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11 3381 bdev_strategy:start write_sync 257 0 <none>
11 3381 bdev_strategy:start write_sync 257 0 <none>
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11 3381 bdev_strategy:start write_sync 257 0 <none>
11 3381 bdev_strategy:start write_sync 257 0 <none>
11 3381 bdev_strategy:start write_sync 16777473 0 <none>
11 3381 bdev_strategy:start write_sync 16777473 0 <none>
As I see buffer size shows only in first line 1024 and it cold be write I looking for. So b_flags for this write is 524561 and value according to /usr/include/sys/buf.h means:
0x0001 B_BUSY -> not on av_forw/back list
0x0010 B_PAGEIO -> do I/O to pages on bp->p_pages
0x0100 B_WRITE -> non-read pseudo-flag
0x080000 B_NOCACHE -> dont cache block when released
So if this true than you can find all sync writes with
dtrace -n 'io:::start / args[0]->b_flags == 524561 / {@Z[execname,args[2]->fi_pathname]=count();}'
This is how far I got and I'm not really sure if this is correct way.
P.S. sorry for my english
Edited by: 811258 on Jan 27, 2012 2:23 AM
Edited by: 811258 on Jan 27, 2012 2:24 AM
Edited by: 811258 on Jan 27, 2012 2:28 AM

there is a way to activate the processing of a file using a trigger file;
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hope it helps

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Synchronous writes using FileAdapter

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