Examples with JdbcLookupBolt org.apache.storm.jdbc.bolt.JdbcLookupBolt used on opensource projects

Example 1 with JdbcLookupBolt

use of org.apache.storm.jdbc.bolt.JdbcLookupBolt in project storm by apache.

the class UserPersistanceTopology method getTopology.

@Override
public StormTopology getTopology() {
    JdbcLookupBolt departmentLookupBolt = new JdbcLookupBolt(connectionProvider, SELECT_QUERY, this.jdbcLookupMapper);
    //must specify column schema when providing custom query.
    List<Column> schemaColumns = Lists.newArrayList(new Column("create_date", Types.DATE), new Column("dept_name", Types.VARCHAR), new Column("user_id", Types.INTEGER), new Column("user_name", Types.VARCHAR));
    JdbcMapper mapper = new SimpleJdbcMapper(schemaColumns);
    JdbcInsertBolt userPersistanceBolt = new JdbcInsertBolt(connectionProvider, mapper).withInsertQuery("insert into user (create_date, dept_name, user_id, user_name) values (?,?,?,?)");
    // userSpout ==> jdbcBolt
    TopologyBuilder builder = new TopologyBuilder();
    builder.setSpout(USER_SPOUT, this.userSpout, 1);
    builder.setBolt(LOOKUP_BOLT, departmentLookupBolt, 1).shuffleGrouping(USER_SPOUT);
    builder.setBolt(PERSISTANCE_BOLT, userPersistanceBolt, 1).shuffleGrouping(LOOKUP_BOLT);
    return builder.createTopology();
}