How to do batchUpdate instead of update on Namedparameterjdbctemplate

normx222 :

I am parsing a file and am creating a list of string elements that im inserting in to my table. Im trying to set a batch size of 5 rows inserted at a time and can't figure out how to use .batchupdate in place of .update in my code.

insert method

public void insertZygateData(List<ZygateEntity> parseData) {
        String sql = "INSERT INTO Landing.midrange_xygate_load (account_name,command_name,system_name,CREATE_DT) VALUES (:account_name,:command_name,:system_name,:CREATE_DT);";

        final int batchSize = 5;

        for (ZygateEntity zygateInfo : parseData){
            SqlParameterSource source = new MapSqlParameterSource("account_name", zygateInfo.getAccountName())
                    .addValue("command_name", zygateInfo.getCommandName())
                    .addValue("system_name", zygateInfo.getSystemName())
                    .addValue("CREATE_DT", zygateInfo.getCreateDt());
            namedParameterJdbcTemplate.update(sql, source);
        }
    }

Andreas :

You're currently calling update(String sql, SqlParameterSource paramSource).

The comparable batch version is batchUpdate(String sql, SqlParameterSource[] batchArgs).

So it seems pretty obvious, to do it as a batch, build an array, and make the call.

final int batchSize = 5;

List<SqlParameterSource> args = new ArrayList<>();
for (ZygateEntity zygateInfo : parseData){
    SqlParameterSource source = new MapSqlParameterSource("account_name", zygateInfo.getAccountName())
            .addValue("command_name", zygateInfo.getCommandName())
            .addValue("system_name", zygateInfo.getSystemName())
            .addValue("CREATE_DT", zygateInfo.getCreateDt());
    args.add(source);
    if (args.size() == batchSize) {
        namedParameterJdbcTemplate.batchUpdate(sql, args.toArray(new SqlParameterSource[args.size()]));
        args.clear();
    }
}
if (! args.isEmpty()) {
    namedParameterJdbcTemplate.batchUpdate(sql, args.toArray(new SqlParameterSource[args.size()]));
}