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http://issues.apache.org/bugzilla/show_bug.cgi?id=35028 Summary: [sandbox compress] add a memory efficient stream compress InputStream - e.g. a "DeflaterInputStream" Product: Commons Version: unspecified Platform: Other URL: http://lists.mysql.com/java/8369 OS/Version: All Status: NEW Severity: enhancement Priority: P2 Component: Sandbox AssignedTo: commons-dev@jakarta.apache.org ReportedBy: [EMAIL PROTECTED] 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. -- Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
