I shared an answer in your duplicate SO
question<https://stackoverflow.com/questions/48636279/is-there-compress-option-for-exportlistener-in-marklogic-java-client-api/48649442>,
but I'll repeat it here in case it helps anyone.
Your onDocumentReady listener is run for each document, so I'm guessing it
doesn't make sense to create a new FileOutputStream("F:/Json/file.zip"); for
each document. That's why you're only seeing the last document when you're
done. Try moving these two lines to before you initialize your batcher:
final FileOutputStream dest = new
FileOutputStream("F:/Json/file.zip");
final ZipOutputStream out = new ZipOutputStream(new
BufferedOutputStream(dest));
That way they'll only run once.
Also, move this until after dmm.stopJob(batcher);:
out.close();
Also, surround your listener code in a synchronized(out) {...} block so the
threads won't overwrite each other as they write to the stream. Remember, your
listener code is going to run in 10 threads in parallel, so your code in the
listener needs to be thread-safe.
Sam Mefford
Senior Engineer
MarkLogic Corporation
[email protected]
Cell: +1 801 706 9731
www.marklogic.com<http://www.marklogic.com>
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________________________________
From: [email protected]
<[email protected]> on behalf of C. Yaswanth
<[email protected]>
Sent: Wednesday, February 7, 2018 7:13 AM
To: MarkLogic Developer Discussion
Subject: [MarkLogic Dev General] Extracting ML Documents to a zip file using
Java Client Api ?
Hi,
I am exporting all the documents from a collection to local directory . Below
is my code.
public class Extract {
static // replace with your MarkLogic Server connection information
DatabaseClient client =
DatabaseClientFactory.newClient("x", x,
"x", "x",
Authentication.DIGEST);
private static String EX_DIR = "F:/JavaExtract";
// Loading files into the database asynchronously
public static void exportByQuery() {
DataMovementManager dmm = client.newDataMovementManager();
// Construct a directory query with which to drive the job.
QueryManager qm = client.newQueryManager();
StringQueryDefinition query = qm.newStringDefinition();
query.setCollections("GOT");
// Create and configure the batcher
QueryBatcher batcher = dmm.newQueryBatcher(query);
batcher.withBatchSize(10)
.withThreadCount(1)
.onUrisReady(
new ExportListener()
.onDocumentReady(doc-> {
String uriParts[] = doc.getUri().split("/");
try {
FileOutputStream dest = new
FileOutputStream("F:/Json/file.zip");
ZipOutputStream out = new ZipOutputStream(new
BufferedOutputStream(dest));
ZipEntry e = new
ZipEntry(uriParts[uriParts.length - 1]);
out.putNextEntry(e);
byte[] data = doc.getContent(
new StringHandle()).toBuffer();
doc.getFormat();
out.write(data, 0, data.length);
out.closeEntry();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}))
.onQueryFailure( exception -> exception.printStackTrace() );
dmm.startJob(batcher);
// Wait for the job to complete, and then stop it.
batcher.awaitCompletion();
dmm.stopJob(batcher);
}
public static void main(String[] args) {
exportByQuery();
}
}
When i am running it is taking only the last document in `GOT` collection and
keeping in zip rather than taking all.
Cant figure it out where it where i am doing wrong?
Any Help Is Appreciated
Thanks
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