Transaction.java

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package org.apache.doris.transaction;

import org.apache.doris.common.UserException;

public interface Transaction {

    void commit() throws UserException;

    void rollback();

    /**
     * Receives one serialized commit fragment produced by BE after writing a
     * data fragment. Implementations deserialize their connector-specific Thrift
     * payload and accumulate it for {@link #commit()}.
     *
     * <p>Default is a no-op for transactions that do not collect BE commit data.</p>
     *
     * @param commitFragment the serialized connector-specific commit payload
     */
    default void addCommitData(byte[] commitFragment) {
        // no-op: write transactions override this
    }

    /** Returns the number of rows affected by the write(s) in this transaction. */
    default long getUpdateCnt() {
        return 0;
    }
}