org.marid.db.dao

Interface DaqWriter<T extends Serializable>

All Superinterfaces:

AutoCloseable, DaqMXBean, DaqReader<T>

All Known Subinterfaces:

NumericWriter

public interface DaqWriter<T extends Serializable>
extends DaqReader<T>

Author:

Dmitry Ovchinnikov.

Method Summary

Modifier and Type	Method and Description
long	delete(Instant from, Instant to) Clears data within the time range.
long	delete(long[] tags, Instant from, Instant to) Clears data within the time range for the given tags.
Set<DataRecordKey>	merge(List<DataRecord<T>> records, boolean insertOnly) Merges data.

Methods inherited from interface org.marid.db.dao.DaqReader

fetchRecord, fetchRecords, hash, tagCount, tags

Methods inherited from interface org.marid.db.dao.DaqMXBean

getRecordCount

Methods inherited from interface java.lang.AutoCloseable

close

Method Detail

delete

long delete(Instant from,
            Instant to)

Clears data within the time range.

Parameters:

from - Lower bound (inclusive).

to - Upper bound (exclusive).

Returns:

Count of removed records.

delete

long delete(long[] tags,
            Instant from,
            Instant to)

Clears data within the time range for the given tags.

Parameters:

tags - Tags.

from - Lower bound (inclusive).

to - Upper bound (exclusive).

Returns:

Count of removed records.

merge

Set<DataRecordKey> merge(List<DataRecord<T>> records,
                         boolean insertOnly)

Merges data.

Parameters:

records - Data records.

insertOnly - Insert-only flag (if true, the values keep unchanged on key equality).

Returns:

Merge result.