On Mon Jan 26 2015 at 7:53:42 PM Christian Grün <christian.gruen@gmail.com> wrote:

Hi Johan,

I haven't come across this exception before. Maybe you can find out
which value is bound to the LOCATION variable in your environment [1]?

Thanks in advance,
Christian

[1] https://github.com/BaseXdb/basex/blob/master/basex-core/src/main/java/org/basex/util/Prop.java#L25-L39

On Mon, Jan 26, 2015 at 4:17 PM, Johan Mörén <johan.moren@gmail.com> wrote:
> We run the script that uses this functionality embedded in a java
> application. I noticed now that the first time the code runs after a cold
> start. This log message appears.
>
> java.nio.file.FileSystemNotFoundException: Provider "wrap" not installed
> at java.nio.file.Paths.get(Paths.java:147)
> at org.basex.util.Prop.homePath(Prop.java:142)
> at org.basex.util.Prop.<clinit>(Prop.java:96)
> at org.basex.core.StaticOptions.<clinit>(StaticOptions.java:20)
> at org.basex.core.Context.<init>(Context.java:77)
> at org.basex.core.Context.<init>(Context.java:69)
> at
> se.kb.mimer.util.xquery.XQueryClient.extractPackageFilesData(XQueryClient.java:16)
> ....
>
> The script still produces the expected output. I guess that this is a
> handled exception inside BaseX that get printed out to the log with INFO
> level. Am i right?
>
> Regards,
> Johan
>
> On Mon Jan 26 2015 at 2:24:41 PM Christian Grün <christian.gruen@gmail.com>
> wrote:
>>
>> Hi Johan,
>>
>> > Just wanted to report back that it works really well.
>>
>> Glad to hear it works.
>>
>> > It is about 50% slower
>> > than running the md5 command on the command line of my mac.
>>
>> My final solution is close to the one you proposed [1]: I decided to
>> use a little buffer as well, because it was faster than calling
>> md.update() for each single byte.
>>
>> Using nio channels gives us better performance:
>>
>> String path = ...
>> RandomAccessFile raf = new RandomAccessFile(path, "r");
>> FileChannel ch = raf.getChannel();
>> ByteBuffer buf = ByteBuffer.allocate(IO.BLOCKSIZE);
>> final MessageDigest md = MessageDigest.getInstance("md5");
>> do {
>> final int n = ch.read(buf);
>> if(n == -1) break;
>> md.update(buf.array(), 0, n);
>> buf.flip();
>> } while(true);
>> System.out.println(Token.string(Token.hex(md.digest(), true)));
>>
>> But I am not sure how smoothly this would integrate in our remaining
>> streaming architecture, as we are also streaming main-memory objects.
>> I'll keep it in mind, though.
>>
>> Cheers,
>> Christian
>>
>> [1]
>> https://github.com/BaseXdb/basex/blob/master/basex-core/src/main/java/org/basex/query/func/hash/HashFn.java