[ http://issues.apache.org/jira/browse/SANDBOX-129?page=all ]
Henri Yandell updated SANDBOX-129: ---------------------------------- Component: Compress > [compress] add a memory efficient stream compress InputStream - e.g. a > "DeflaterInputStream" > -------------------------------------------------------------------------------------------- > > Key: SANDBOX-129 > URL: http://issues.apache.org/jira/browse/SANDBOX-129 > Project: Commons Sandbox > Type: Improvement > Components: Compress > Environment: Operating System: All > Platform: Other > Reporter: Ralf Hauser > Priority: Minor > > Assume from a struts-tomcate web-app I get a large file that I want to store > in > a DB. To save DB permanent storage, I want to compress this. To be portable, I > rather want to do that in java than on the DB-side with some proprietary > commands. > In order not to have to load into the RAM at least the entire compressed > output > by e.g. creating a ByteArrayOutputStream with for example > java.util.zip.GZIPOutputStream or java.util.zip.DeflaterOutputStream and then > converting it back to an InputStream for the PreparedStatement > stmt.setBinaryStream(int pos, > InputStream stream, int length), I envision an InputStream converter that is > memory efficient. > I started implementing it myself and got it working at least for > single-byte reads. But it is far from production-readiness - perhaps I should > rather extend java.io.PipedInputStream than trying to do my own efficient > buffer management and do all the synchronize() blocking etc. > ==> shouldn't something go into org.apache.commons.compress.zip? > There are certainly other applications for such a class. > P.S.: Alternatively, there is a "OutputStream > java.sql.Blob.setBinaryStream(long > pos)" but for example in MySQL that "updatable BLOB that can update in-place" > is > not yet implemented. Doing proprietary SQL-"COMPRESS" as per > http://dev.mysql.com/doc/mysql/en/string-functions.html is probably an even > less > preferrable option. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]