R2DBC 드라이버
환경 요구 사항
- OpenJDK 버전 8 이상
설정
<dependency>
<groupId>com.clickhouse</groupId>
<!-- SPI 0.9.1.RELEASE의 경우 clickhouse-r2dbc_0.9.1로 변경하십시오 -->
<artifactId>clickhouse-r2dbc</artifactId>
<version>0.7.1</version>
<!-- 모든 의존성이 포함된 uber jar를 사용하려면 그대로 두고, 더 작은 jar가 필요하면 classifier를 http 또는 grpc로 변경하십시오 -->
<classifier>all</classifier>
<exclusions>
<exclusion>
<groupId>*</groupId>
<artifactId>*</artifactId>
</exclusion>
</exclusions>
</dependency>
ClickHouse에 연결하기
showLineNumbers
ConnectionFactory connectionFactory = ConnectionFactories
.get("r2dbc:clickhouse:http://{username}:{password}@{host}:{port}/{database}");
Mono.from(connectionFactory.create())
.flatMapMany(connection -> connection
쿼리
showLineNumbers
connection
.createStatement("select domain, path, toDate(cdate) as d, count(1) as count from clickdb.clicks where domain = :domain group by domain, path, d")
.bind("domain", domain)
.execute()
.flatMap(result -> result
.map((row, rowMetadata) -> String.format("%s%s[%s]:%d", row.get("domain", String.class),
row.get("path", String.class),
row.get("d", LocalDate.class),
row.get("count", Long.class)))
)
.doOnNext(System.out::println)
.subscribe();
삽입
showLineNumbers
connection
.createStatement("insert into clickdb.clicks values (:domain, :path, :cdate, :count)")
.bind("domain", click.getDomain())
.bind("path", click.getPath())
.bind("cdate", LocalDateTime.now())
.bind("count", 1)
.execute();