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java.lang.Objectcom.sleepycat.je.util.DbTruncateLog
public class DbTruncateLog
DbTruncateLog is a utility that lets the user truncate the JE log at a specified file and offset. Generally used in replication systems for handling com.sleepycat.je.rep.RollbackProhibitedException, to permit the application to interject application specific handling. Should be used with caution.
The parameters for DbTruncateLog are provided through the RollbackProhibitedException instance, and the exception message. The goal is to truncate the JE log at a specified file number and file offset. DbTruncateLog will only affect the specified file. Any files that follow the specified file should be manually moved away.
For example, suppose the JE log consists of these files:
00000002.jdb 0000000e.jdb 0000000f.jdb 00000010.jdb 00000012.jdb 0000001d.jdb 0000001e.jdb 0000001f.jdbAnd the log must be truncated at file 0x1d, offset 0x34567. The following steps should be taken:
Constructor Summary | |
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DbTruncateLog()
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Method Summary | |
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static void |
main(String[] argv)
Usage: |
void |
truncateLog(File env,
long truncFileNum,
long truncOffset)
Truncate the JE log to the given file and offset. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public DbTruncateLog()
Method Detail |
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public static void main(String[] argv)
-h environmentDirectory -f file number. If hex, prefix with "0x" -o file offset byte. If hex, prefix with "0x"For example, to truncate a log to file 0xa, offset 0x1223:
DbTruncateLog -h <environmentDir> -f 0xa -o 0x1223
public void truncateLog(File env, long truncFileNum, long truncOffset) throws IOException
IOException
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