Berkeley DB: DbEnv.set_feedback
Description: Berkeley DB: An embedded database programmatic toolkit.
Keywords: embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++

# DbEnv.set_feedback |

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###

    import com.sleepycat.db.*;

    public interface DbEnvFeedback
    {
    	public abstract void db_feedback(DbEnv dbenv, int opcode, int pct);
    }
    public class DbEnv
    {
    	public void set_feedback(DbEnvFeedback db_feedback)
    		throws DbException;
    	...
    }

# Description

Some operations performed by the Berkeley DB library can take non-trivial amounts of time. The DbEnv.set_feedback method can be used by applications to monitor progress within these operations.

When an operation is likely to take a long time, Berkeley DB will call the specified callback method. This method must be declared with three arguments: the first will be a reference to the enclosing environment, the second a flag value, and the third the percent of the operation that has been completed, specified as an integer value between 0 and 100. It is up to the callback method to display this information in an appropriate manner.

The opcode argument may take on any of the following values:

Db.DB_RECOVER
  The environment is being recovered.

The DbEnv.set_feedback interface may be used to configure Berkeley DB at any time during the life of the application.

The DbEnv.set_feedback method throws an exception that encapsulates a non-zero error value on failure.

# Class

DbEnv

# See Also

DbEnv.close, DbEnv.get_version_string, DbEnv.open, DbEnv.remove, DbEnv.set_cachesize, DbEnv.set_data_dir, DbEnv.set_errcall, DbEnv.set_error_stream, DbEnv.set_errpfx, DbEnv.set_feedback, DbEnv.set_flags, DbEnv.set_mutexlocks, DbEnv.set_pageyield, DbEnv.set_panicstate, DbEnv.set_recovery_init, DbEnv.set_rpc_server, DbEnv.set_region_init, DbEnv.set_shm_key, DbEnv.set_tas_spins, DbEnv.set_tmp_dir, DbEnv.set_verbose, and DbEnv.strerror.`

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