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flinksql读写redis


发布时间: 2022-11-24 18:39:06    浏览次数:70 次

0、前言

  最近有个需求,需要使用flinksql读写redis,由于官网上并没有redis的connector,在网上找了很久,开源的几个connector又没法满足要求,所有这里就自己动手实现了一个。已经适配了各个版本的flink,从flink1.12到flink1.15。

  简单介绍一下功能吧:

  • 将redis作为流表时支持BLPOP、BRPOP、LPOP、RPOP、SPOP等命令;使用lua脚本封装的批量弹出提高消费性能
  • 将redis作为维表时支持GET、HGET等命令;支持lookup缓存
  • 将redis作为sink表时支持LPUSH、RPUSH、SADD、SET、HSET等命令;支持指定key的ttl时间
  • 支持flink常见的序列化反序列化方式,如json、csv等,具体参见flink官网:https://nightlies.apache.org/flink/flink-docs-release-1.15/docs/connectors/table/formats/overview/

1、redis作为流表

1.1、数据准备

  

    @Before
    public void init() {
        /**
            设置当前属于测试模式,在这个测试模式下,当流表数据消费完成后程序会停止,方便测试,这个模式默认false
        */
        RedisOptions.IS_TEST = true;
        RedisOperator redisOperator = RedisOperators.getSimple("10.201.0.33",6379,"123456",0);
        List<String> lists = new ArrayList<>();
        for (int i = 0; i < 1000; i++) {
            lists.add("{\n" +
                    "  \"number\": " + i + ",\n" +
                    "  \"name\": \"学生" + i + "\",\n" +
                    "  \"school\": \"学校" + ((i % 3) + 1) +"\",\n" +
                    "  \"class_id\": " + ((i % 10) + 1) +"\n" +
                    "}");
        }
        /**
         * 初始化学生数据
         */
        for (int i = 0; i < 1; i++) {
            redisOperator.rpush("students", lists.subList(1000 * i, 1000 * (i + 1)));
        }
        /**
         * 初始化班级数据
         */
        for(int i = 0;i < 10;i++) {
            redisOperator.set(String.valueOf(i + 1),"银河" + (i + 1) + "班");
        }

        /**
         * 初始化学校班级数据
         */
        for(int j = 1;j < 4;j++) {
            for (int i = 1; i < 11; i++) {
                redisOperator.hset("学校" + j, String.valueOf(i), "银河" + i + "班");
            }
        }
    }

1.2、使用BLPOP、BRPOP、LPOP、RPOP、SPOP消费指定的key的list或者set的数据

    @Test
    public void testBlpopSQL() throws Exception {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

        EnvironmentSettings environmentSettings =
                EnvironmentSettings.newInstance().useBlinkPlanner().inStreamingMode().build();
        StreamTableEnvironment tEnv = StreamTableEnvironment.create(env, environmentSettings);

        String source =
                "CREATE TABLE students\n" +
                        "(\n" +
                        "    number  BIGINT ,\n" +
                        "    name  string,\n" +
                        "    school   string, \n" +
                        "    class_id   BIGINT \n" +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'database'='0',\n" +
                        "  'key'='students',\n" +
                        "  'format'='json',\n" +
                        "  'batch-fetch-rows'='1000',\n" +
                        "  'json.fail-on-missing-field' = 'false',\n" +
                        "  'json.ignore-parse-errors' = 'true',\n" +
                        "  'command'='BLPOP'\n" +
                        " )";



        String sink =
                "CREATE TABLE sink_students\n" +
                        "(\n" +
                        "    number  BIGINT ,\n" +
                        "    name  string,\n" +
                        "    school   string, \n" +
                        "    class_id   BIGINT \n" +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='print'\n" +
                        " )";

        tEnv.executeSql(source);
        tEnv.executeSql(sink);

        String sql =
                " insert into sink_students select * from students";
        TableResult tableResult = tEnv.executeSql(sql);
        tableResult.getJobClient().get().getJobExecutionResult().get();
    }

2、redis作为维表(不带format)

2.1、数据准备

    @Before
    public void init() {
        /**
            设置当前属于测试模式,在这个测试模式下,当流表数据消费完成后程序会停止,方便测试,这个模式默认false
        */
        RedisOptions.IS_TEST = true;
        RedisOperator redisOperator = RedisOperators.getSimple("10.201.0.33",6379,"123456",0);
        List<String> lists = new ArrayList<>();
        for (int i = 0; i < 1000; i++) {
            lists.add("{\n" +
                    "  \"number\": " + i + ",\n" +
                    "  \"name\": \"学生" + i + "\",\n" +
                    "  \"school\": \"学校" + ((i % 3) + 1) +"\",\n" +
                    "  \"class_id\": " + ((i % 10) + 1) +"\n" +
                    "}");
        }
        /**
         * 初始化学生数据
         */
        for (int i = 0; i < 1; i++) {
            redisOperator.rpush("students", lists.subList(1000 * i, 1000 * (i + 1)));
        }
        /**
         * 初始化班级数据
         */
        for(int i = 0;i < 10;i++) {
            redisOperator.set(String.valueOf(i + 1),"银河" + (i + 1) + "班");
        }

        /**
         * 初始化学校班级数据
         */
        for(int j = 1;j < 4;j++) {
            for (int i = 1; i < 11; i++) {
                redisOperator.hset("学校" + j, String.valueOf(i), "银河" + i + "班");
            }
        }
    }

2.2、使用GET作为维表查询命令

    @Test
    public void testGetSQL() throws Exception {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

        EnvironmentSettings environmentSettings =
                EnvironmentSettings.newInstance().useBlinkPlanner().inStreamingMode().build();
        StreamTableEnvironment tEnv = StreamTableEnvironment.create(env, environmentSettings);

        String source =
                "CREATE TABLE students\n" +
                        "(\n" +
                        "    number  BIGINT ,\n" +
                        "    name  string,\n" +
                        "    school   string, \n" +
                        "    class_id   BIGINT, \n" +
                        "    proctime as PROCTIME() \n" +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'database'='0',\n" +
                        "  'key'='students',\n" +
                        "  'format'='json',\n" +
                        "  'batch-fetch-rows'='1000',\n" +
                        "  'json.fail-on-missing-field' = 'false',\n" +
                        "  'json.ignore-parse-errors' = 'true',\n" +
                        "  'command'='BLPOP'\n" +
                        " )";

        /**
            这里需要注意的是,由于使用get命令,而且没有加format属性,所以维表只能有两个字段,多了也识别不到,
            详细可以看源码里的注释
        */
        String daeamon =
                "CREATE TABLE classes\n" +
                        "(\n" +
                        "    class_id  BIGINT   ,\n" +
                        "    class_name  string   " +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'lookup.cache.max-rows'='1000',\n" +
                        "  'lookup.cache.ttl'='3600',\n" +
                        "  'lookup.cache.load-all'='true',\n" +
                        "  'database'='0',\n" +
                        "  'command'='GET'\n" +
                        " )";


        String sink =
                "CREATE TABLE sink_students\n" +
                        "(\n" +
                        "    number  BIGINT ,\n" +
                        "    name  string,\n" +
                        "    school   string, \n" +
                        "    class_id   BIGINT, \n" +
                        "    class_name   string \n" +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='print'\n" +
                        " )";

        tEnv.executeSql(source);
        tEnv.executeSql(daeamon);
        tEnv.executeSql(sink);
        /**
            这里join的字段必须是GET命令的key
        */
        String sql =
                " insert into sink_students "
                + " select s.number,s.name,s.school,s.class_id,d.class_name  from students s"
                + "  left join classes for system_time as of s.proctime as d  on d.class_id = s.class_id";
        TableResult tableResult = tEnv.executeSql(sql);
        tableResult.getJobClient().get().getJobExecutionResult().get();
    }

2.3、使用HGET作为维表查询命令

    @Test
    public void testHGetSQL() throws Exception {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

        EnvironmentSettings environmentSettings =
                EnvironmentSettings.newInstance().useBlinkPlanner().inStreamingMode().build();
        StreamTableEnvironment tEnv = StreamTableEnvironment.create(env, environmentSettings);

        String source =
                "CREATE TABLE students\n" +
                        "(\n" +
                        "    number  BIGINT ,\n" +
                        "    name  string,\n" +
                        "    school   string, \n" +
                        "    class_id   BIGINT, \n" +
                        "    proctime as PROCTIME() \n" +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'database'='0',\n" +
                        "  'key'='students',\n" +
                        "  'format'='json',\n" +
                        "  'batch-fetch-rows'='1000',\n" +
                        "  'json.fail-on-missing-field' = 'false',\n" +
                        "  'json.ignore-parse-errors' = 'true',\n" +
                        "  'command'='BLPOP'\n" +
                        " )";
        /**
            这里需要注意的是,由于使用hget命令,而且没有加format属性,所以维表只能有三个字段,多了也识别不到,
            详细可以看源码里的注释
        */
        String daeamon =
                "CREATE TABLE classes\n" +
                        "(\n" +
                        "    school   string, \n" +
                        "    class_id  BIGINT   ,\n" +
                        "    class_name  string   " +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'lookup.cache.max-rows'='1000',\n" +
                        "  'lookup.cache.ttl'='3600',\n" +
                        "  'lookup.cache.load-all'='true',\n" +
                        "  'database'='0',\n" +
                        "  'command'='HGET'\n" +
                        " )";


        String sink =
                "CREATE TABLE sink_students\n" +
                        "(\n" +
                        "    number  BIGINT ,\n" +
                        "    name  string,\n" +
                        "    school   string, \n" +
                        "    class_id   BIGINT, \n" +
                        "    class_name   string \n" +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='print'\n" +
                        " )";

        tEnv.executeSql(source);
        tEnv.executeSql(daeamon);
        tEnv.executeSql(sink);
        /**
            这里需要注意的是,由于使用hget命令,这里join的参数两个参数顺序没有关系,真正执行hget命令哪个字段作为key,
            哪个字段作为field只与维表定义的时候的字段顺序有关系
        */
        String sql =
                " insert into sink_students "
                        + " select s.number,s.name,s.school,s.class_id,d.class_name  from students s"
                        + "  left join classes for system_time as of s.proctime as d  on d.class_id = s.class_id and d.school = s.school";
        TableResult tableResult = tEnv.executeSql(sql);
        tableResult.getJobClient().get().getJobExecutionResult().get();
    }

3、redis作为维表(带format)

3.1、数据准备

    @Before
    public void init() {
        RedisOptions.IS_TEST = true;
        RedisOperator redisOperator = RedisOperators.getSimple("10.201.0.33",6379,"123456",0);
        List<String> lists = new ArrayList<>();
        for (int i = 0; i < 1000; i++) {
            lists.add("{\n" +
                    "  \"number\": " + i + ",\n" +
                    "  \"name\": \"学生" + i + "\",\n" +
                    "  \"school\": \"学校" + ((i % 3) + 1) +"\",\n" +
                    "  \"class_id\": " + ((i % 10) + 1) +"\n" +
                    "}");
        }
        /**
         * 初始化学生数据
         */
        for (int i = 0; i < 1; i++) {
            redisOperator.rpush("students", lists.subList(1000 * i, 1000 * (i + 1)));
        }
        /**
         * 初始化班级数据
         */
        for(int i = 0;i < 10;i++) {
            JSONObject jsonObject = new JSONObject();
            jsonObject.put("class_id",String.valueOf(i + 1));
            jsonObject.put("class_name","银河" + (i + 1) + "班");
            jsonObject.put("remark","remark" + i);
            redisOperator.set(String.valueOf(i + 1),jsonObject.toString());
        }

        /**
         * 初始化学校班级数据
         */
        for(int j = 1;j < 4;j++) {
            for (int i = 1; i < 11; i++) {
                JSONObject jsonObject = new JSONObject();
                jsonObject.put("class_id",String.valueOf(i));
                jsonObject.put("class_name","银河" + i + "班");
                jsonObject.put("remark","remark" + i);
                jsonObject.put("school","学校" + j);
                redisOperator.hset("学校" + j, String.valueOf(i), jsonObject.toString());
            }
        }
    }

3.2、使用GET作为维表查询命令

    @Test
    public void testGetSQL() throws Exception {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

        EnvironmentSettings environmentSettings =
                EnvironmentSettings.newInstance().useBlinkPlanner().inStreamingMode().build();
        StreamTableEnvironment tEnv = StreamTableEnvironment.create(env, environmentSettings);

        String source =
                "CREATE TABLE students\n" +
                        "(\n" +
                        "    number  BIGINT ,\n" +
                        "    name  string,\n" +
                        "    school   string, \n" +
                        "    class_id   BIGINT, \n" +
                        "    proctime as PROCTIME() \n" +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'database'='0',\n" +
                        "  'key'='students',\n" +
                        "  'format'='json',\n" +
                        "  'batch-fetch-rows'='1000',\n" +
                        "  'json.fail-on-missing-field' = 'false',\n" +
                        "  'json.ignore-parse-errors' = 'true',\n" +
                        "  'command'='BLPOP'\n" +
                        " )";

        /**
         * 这里测试的核心是维表有format=json配置项,有了format配置项后,字段个数不受限制,但是需要注意的是,作为get命令的key的字段
         * 一定要放在表申明的第一位,并且get命令的value的值使用format格式化后,比如是json格式,则json里一定要包含作为维表查询的
         *  join on后面带的作为key的查询列,不然会报空指针异常
         */ 
        String daeamon =
                "CREATE TABLE classes\n" +
                        "(\n" +
                        "    class_id  BIGINT   ,\n" +
                        "    class_name  string ,\n   " +
                        "    remark  string   " +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'format'='json', \n" +
                        "  'password'='123456',\n" +
                        "  'lookup.cache.max-rows'='1000',\n" +
                        "  'lookup.cache.ttl'='3600',\n" +
                        "  'lookup.cache.load-all'='true',\n" +
                        "  'database'='0',\n" +
                        "  'command'='GET'\n" +
                        " )";


        String sink =
                "CREATE TABLE sink_students\n" +
                        "(\n" +
                        "    number  BIGINT ,\n" +
                        "    name  string,\n" +
                        "    school   string, \n" +
                        "    class_id   BIGINT, \n" +
                        "    class_name   string, \n" +
                        "    remark  string   " +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='print'\n" +
                        " )";

        tEnv.executeSql(source);
        tEnv.executeSql(daeamon);
        tEnv.executeSql(sink);

        String sql =
                " insert into sink_students "
                        + " select s.number,s.name,s.school,s.class_id,d.class_name,d.remark  from students s"
                        + "  left join classes for system_time as of s.proctime as d  on d.class_id = s.class_id";
        TableResult tableResult = tEnv.executeSql(sql);
        tableResult.getJobClient().get().getJobExecutionResult().get();
    }

3.3、使用HGET作为维表查询命令

    @Test
    public void testHGetSQL() throws Exception {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

        EnvironmentSettings environmentSettings =
                EnvironmentSettings.newInstance().useBlinkPlanner().inStreamingMode().build();
        StreamTableEnvironment tEnv = StreamTableEnvironment.create(env, environmentSettings);

        String source =
                "CREATE TABLE students\n" +
                        "(\n" +
                        "    number  BIGINT ,\n" +
                        "    name  string,\n" +
                        "    school   string, \n" +
                        "    class_id   BIGINT, \n" +
                        "    proctime as PROCTIME() \n" +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'database'='0',\n" +
                        "  'key'='students',\n" +
                        "  'format'='json',\n" +
                        "  'batch-fetch-rows'='1000',\n" +
                        "  'json.fail-on-missing-field' = 'false',\n" +
                        "  'json.ignore-parse-errors' = 'true',\n" +
                        "  'command'='BLPOP'\n" +
                        " )";

        /**
         * 这里测试的核心是维表有format=json配置项,有了format配置项后,字段个数不受限制,但是需要注意的是,作为hget命令的key的字段
         * 一定要放在表申明的第一位,field的字段一定要放在申明的第二位,并且hget命令的value的值使用format格式化后,比如是json格式,          * 则json里一定要包含作为维表查询的 join on后面带的作为key和field的查询列,不然会报空指针异常
         */ 
        String daeamon =
                "CREATE TABLE classes\n" +
                        "(\n" +
                        "    school   string, \n" +
                        "    class_id  BIGINT   ,\n" +
                        "    class_name  string,   " +
                        "    remark  string   " +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'format'='json', \n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'lookup.cache.max-rows'='1000',\n" +
                        "  'lookup.cache.ttl'='3600',\n" +
                        "  'lookup.cache.load-all'='true',\n" +
                        "  'database'='0',\n" +
                        "  'command'='HGET'\n" +
                        " )";


        String sink =
                "CREATE TABLE sink_students\n" +
                        "(\n" +
                        "    number  BIGINT ,\n" +
                        "    name  string,\n" +
                        "    school   string, \n" +
                        "    class_id   BIGINT, \n" +
                        "    class_name   string, \n" +
                        "    remark  string   " +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='print'\n" +
                        " )";

        tEnv.executeSql(source);
        tEnv.executeSql(daeamon);
        tEnv.executeSql(sink);

        String sql =
                " insert into sink_students "
                        + " select s.number,s.name,s.school,s.class_id,d.class_name,d.remark  from students s"
                        + "  left join classes for system_time as of s.proctime as d  on d.class_id = s.class_id and d.school = s.school";
        TableResult tableResult = tEnv.executeSql(sql);
        tableResult.getJobClient().get().getJobExecutionResult().get();
    }

4、redis作为sink表

4.1、数据准备

    @Before
    public void init() {
        RedisOptions.IS_TEST = true;
        RedisOperator redisOperator = RedisOperators.getSimple("10.201.0.33",6379,"123456",0);
        List<String> lists = new ArrayList<>();
        for (int i = 0; i < 1000; i++) {
            lists.add("{\n" +
                    "  \"number\": " + i + ",\n" +
                    "  \"name\": \"学生" + i + "\",\n" +
                    "  \"school\": \"学校" + ((i % 3) + 1) +"\",\n" +
                    "  \"class_id\": " + ((i % 10) + 1) +"\n" +
                    "}");
        }
        /**
         * 初始化学生数据
         */
        for (int i = 0; i < 1; i++) {
            redisOperator.rpush("students", lists.subList(1000 * i, 1000 * (i + 1)));
        }
        /**
         * 初始化班级数据
         */
        for(int i = 0;i < 10;i++) {
            redisOperator.set(String.valueOf(i + 1),"银河" + (i + 1) + "班");
        }

        /**
         * 初始化学校班级数据
         */
        for(int j = 1;j < 4;j++) {
            for (int i = 1; i < 11; i++) {
                redisOperator.hset("学校" + j, String.valueOf(i), "银河" + i + "班");
            }
        }
    }

4.2、使用LPush、RPUSH、SADD命令作为sink表写入命令

@Test
    public void testLPushSQL() throws Exception {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

        EnvironmentSettings environmentSettings =
                EnvironmentSettings.newInstance().useBlinkPlanner().inStreamingMode().build();
        StreamTableEnvironment tEnv = StreamTableEnvironment.create(env, environmentSettings);

        String source =
                "CREATE TABLE students\n" +
                        "(\n" +
                        "    number  BIGINT ,\n" +
                        "    name  string,\n" +
                        "    school   string, \n" +
                        "    class_id   BIGINT, \n" +
                        "    proctime as PROCTIME() \n" +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'database'='0',\n" +
                        "  'key'='students',\n" +
                        "  'format'='json',\n" +
                        "  'batch-fetch-rows'='1000',\n" +
                        "  'json.fail-on-missing-field' = 'false',\n" +
                        "  'json.ignore-parse-errors' = 'true',\n" +
                        "  'command'='BLPOP'\n" +
                        " )";

        String daeamon =
                "CREATE TABLE classes\n" +
                        "(\n" +
                        "    school   string, \n" +
                        "    class_id  BIGINT   ,\n" +
                        "    class_name  string   " +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'lookup.cache.max-rows'='1000',\n" +
                        "  'lookup.cache.ttl'='3600',\n" +
                        "  'lookup.cache.load-all'='true',\n" +
                        "  'database'='0',\n" +
                        "  'command'='HGET'\n" +
                        " )";

        /**
         *  1、这里因为command是LPUSH,所以不需要primary key(number) not enforced, 因为这种命令只支持INSERT语义
         *  2、并行度配置项sink.parallelism没有配置,默认为核心数
         */
        String sink =
                "CREATE TABLE sink_students\n" +
                        "(\n" +
                        "    number  BIGINT ,\n" +
                        "    name  string,\n" +
                        "    school   string, \n" +
                        "    class_id   BIGINT, \n" +
                        "    class_name   string \n" +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'database'='0',\n" +
                        "  'key'='sink_students_list',\n" +
                        "  'format'='json',\n" +
                        "  'batch-fetch-rows'='1000',\n" +
                        "  'json.fail-on-missing-field' = 'false',\n" +
                        "  'json.ignore-parse-errors' = 'true',\n" +
                        "  'command'='LPUSH'\n" +
                        " )";

        tEnv.executeSql(source);
        tEnv.executeSql(daeamon);
        tEnv.executeSql(sink);

        String sql =
                " insert into sink_students "
                + " select s.number,s.name,s.school,s.class_id,d.class_name  from students s"
                + " left join classes for system_time as of s.proctime as d on d.class_id = s.class_id and d.school = s.school";
        TableResult tableResult = tEnv.executeSql(sql);
        tableResult.getJobClient().get().getJobExecutionResult().get();
    }

4.2、使用SET命令作为sink表写入命令

    @Test
    public void testSet() throws Exception {
        long start = System.currentTimeMillis();
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

        EnvironmentSettings environmentSettings =
                EnvironmentSettings.newInstance().useBlinkPlanner().inStreamingMode().build();
        StreamTableEnvironment tEnv = StreamTableEnvironment.create(env, environmentSettings);

        String source =
                "CREATE TABLE students\n" +
                        "(\n" +
                        "    number  BIGINT ,\n" +
                        "    name  string,\n" +
                        "    school   string, \n" +
                        "    class_id   BIGINT, \n" +
                        "    proctime as PROCTIME() \n" +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'database'='0',\n" +
                        "  'key'='students',\n" +
                        "  'format'='json',\n" +
                        "  'batch-fetch-rows'='1000',\n" +
                        "  'json.fail-on-missing-field' = 'false',\n" +
                        "  'json.ignore-parse-errors' = 'true',\n" +
                        "  'command'='BLPOP'\n" +
                        " )";

        String daeamon =
                "CREATE TABLE classes\n" +
                        "(\n" +
                        "    school   string, \n" +
                        "    class_id  BIGINT   ,\n" +
                        "    class_name  string   " +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'lookup.cache.max-rows'='1000',\n" +
                        "  'lookup.cache.ttl'='3600',\n" +
                        "  'lookup.cache.load-all'='true',\n" +
                        "  'database'='0',\n" +
                        "  'command'='HGET'\n" +
                        " )";

        /**
         *  1、这里因为command是SET,所以需要一个key,这里key就是使用主键,多个就用下划线拼接起来,
         *  2、并行度配置项sink.parallelism没有配置,默认为核心数
         */
        String sink =
                "CREATE TABLE sink_students\n" +
                        "(\n" +
                        "    school   string, \n" +
                        "    number  BIGINT ,\n" +
                        "    name  string,\n" +
                        "    class_id   BIGINT, \n" +
                        "    class_name   string, \n" +
                        "    primary key(school,number) not enforced" +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'database'='0',\n" +
                        "  'format'='json',\n" +
                        "  'batch-fetch-rows'='1000',\n" +
                        "  'json.fail-on-missing-field' = 'false',\n" +
                        "  'json.ignore-parse-errors' = 'true',\n" +
                        "  'command'='SET'\n" +
                        " )";

        tEnv.executeSql(source);
        tEnv.executeSql(daeamon);
        tEnv.executeSql(sink);

        String sql =
                " insert into sink_students "
                        + " select s.school,s.number,s.name,s.class_id,d.class_name  from students s"
                        + " left join classes for system_time as of s.proctime as d on d.class_id = s.class_id and d.school = s.school";
        TableResult tableResult = tEnv.executeSql(sql);
        tableResult.getJobClient().get().getJobExecutionResult().get();
        long end = System.currentTimeMillis();
        System.out.println("耗时:" + (end - start) + "ms");
    }

4.3、使用HSET命令作为sink表写入命令(不指定key)

    @Test
    public void testHSet() throws Exception {
        long start = System.currentTimeMillis();
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

        EnvironmentSettings environmentSettings =
                EnvironmentSettings.newInstance().useBlinkPlanner().inStreamingMode().build();
        StreamTableEnvironment tEnv = StreamTableEnvironment.create(env, environmentSettings);

        String source =
                "CREATE TABLE students\n" +
                        "(\n" +
                        "    number  BIGINT ,\n" +
                        "    name  string,\n" +
                        "    school   string, \n" +
                        "    class_id   BIGINT, \n" +
                        "    proctime as PROCTIME() \n" +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'database'='0',\n" +
                        "  'key'='students',\n" +
                        "  'format'='json',\n" +
                        "  'batch-fetch-rows'='1000',\n" +
                        "  'json.fail-on-missing-field' = 'false',\n" +
                        "  'json.ignore-parse-errors' = 'true',\n" +
                        "  'command'='BLPOP'\n" +
                        " )";

        String daeamon =
                "CREATE TABLE classes\n" +
                        "(\n" +
                        "    school   string, \n" +
                        "    class_id  BIGINT   ,\n" +
                        "    class_name  string   " +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'lookup.cache.max-rows'='1000',\n" +
                        "  'lookup.cache.ttl'='3600',\n" +
                        "  'lookup.cache.load-all'='true',\n" +
                        "  'database'='0',\n" +
                        "  'command'='HGET'\n" +
                        " )";

        /**
         *  1、这里因为command是HSET,所以需要一个key和一个field,这里是按照表申明的顺序,第一个作为key,
         *  第二个作为field,由于需要更新,也需要一个主键,这里最好把前两个字段一起作为主键
         *  2、作为sink有一个sink.key.ttl参数可以设置key保存在redis的ttl生存时间,单位秒,默认为-1表示长期保存
         */
        String sink =
                "CREATE TABLE sink_students\n" +
                        "(\n" +
                        "    school   string, \n" +
                        "    number  BIGINT ,\n" +
                        "    name  string,\n" +
                        "    class_id   BIGINT, \n" +
                        "    class_name   string, \n" +
                        "    primary key(school,number) not enforced" +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'database'='0',\n" +
                        "  'format'='json',\n" +
                        "  'batch-fetch-rows'='1000',\n" +
                        "  'json.fail-on-missing-field' = 'false',\n" +
                        "  'json.ignore-parse-errors' = 'true',\n" +
                        "  'sink.parallelism' = '16',\n" +
                        "  'sink.key.ttl' = '300',\n" +
                        "  'command'='HSET'\n" +
                        " )";

        tEnv.executeSql(source);
        tEnv.executeSql(daeamon);
        tEnv.executeSql(sink);

        String sql =
                " insert into sink_students "
                        + " select s.school,s.number,s.name,s.class_id,d.class_name  from students s"
                        + " left join classes for system_time as of s.proctime as d on d.class_id = s.class_id and d.school = s.school";
        TableResult tableResult = tEnv.executeSql(sql);
        tableResult.getJobClient().get().getJobExecutionResult().get();
        long end = System.currentTimeMillis();
        System.out.println("耗时:" + (end - start) + "ms");
    }

4.4、使用HSET命令作为sink表写入命令(指定key)

    @Test
    public void testHSetWithKey() throws Exception {
        long start = System.currentTimeMillis();
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

        EnvironmentSettings environmentSettings =
                EnvironmentSettings.newInstance().useBlinkPlanner().inStreamingMode().build();
        StreamTableEnvironment tEnv = StreamTableEnvironment.create(env, environmentSettings);

        String source =
                "CREATE TABLE students\n" +
                        "(\n" +
                        "    number  BIGINT ,\n" +
                        "    name  string,\n" +
                        "    school   string, \n" +
                        "    class_id   BIGINT, \n" +
                        "    proctime as PROCTIME() \n" +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'database'='0',\n" +
                        "  'key'='students',\n" +
                        "  'format'='json',\n" +
                        "  'batch-fetch-rows'='1000',\n" +
                        "  'json.fail-on-missing-field' = 'false',\n" +
                        "  'json.ignore-parse-errors' = 'true',\n" +
                        "  'command'='BLPOP'\n" +
                        " )";

        String daeamon =
                "CREATE TABLE classes\n" +
                        "(\n" +
                        "    school   string, \n" +
                        "    class_id  BIGINT   ,\n" +
                        "    class_name  string   " +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'lookup.cache.max-rows'='1000',\n" +
                        "  'lookup.cache.ttl'='3600',\n" +
                        "  'lookup.cache.load-all'='true',\n" +
                        "  'database'='0',\n" +
                        "  'command'='HGET'\n" +
                        " )";

        /**
         *  1、这里因为command是HSET,所以需要一个key和一个field,这里配置项指定了key,那么主键拼接就作为field,
         *  使用hset保存到redis
         *  2、作为sink有一个sink.key.ttl参数可以设置key保存在redis的ttl生存时间,单位秒,默认-1表示长期保存
         */
        String sink =
                "CREATE TABLE sink_students\n" +
                        "(\n" +
                        "    school   string, \n" +
                        "    number  BIGINT ,\n" +
                        "    name  string,\n" +
                        "    class_id   BIGINT, \n" +
                        "    class_name   string, \n" +
                        "    primary key(number) not enforced" +
                        ") \n" +
                        "WITH (\n" +
                        "  'connector'='redis',\n" +
                        "  'host'='10.201.0.33', \n" +
                        "  'port'='6379',\n" +
                        "  'redis-mode'='single', \n" +
                        "  'password'='123456',\n" +
                        "  'database'='0',\n" +
                        "  'format'='json',\n" +
                        "  'key'='sink_students_hset',\n" +
                        "  'batch-fetch-rows'='1000',\n" +
                        "  'json.fail-on-missing-field' = 'false',\n" +
                        "  'json.ignore-parse-errors' = 'true',\n" +
                        "  'sink.parallelism' = '16',\n" +
                        "  'sink.key.ttl' = '300',\n" +
                        "  'command'='HSET'\n" +
                        " )";

        tEnv.executeSql(source);
        tEnv.executeSql(daeamon);
        tEnv.executeSql(sink);

        String sql =
                " insert into sink_students "
                        + " select s.school,s.number,s.name,s.class_id,d.class_name  from students s"
                        + " left join classes for system_time as of s.proctime as d on d.class_id = s.class_id and d.school = s.school";
        TableResult tableResult = tEnv.executeSql(sql);
        tableResult.getJobClient().get().getJobExecutionResult().get();
        long end = System.currentTimeMillis();
        System.out.println("耗时:" + (end - start) + "ms");
    }

5、配置说明

配置项 描述
host redis的host
port redis的port
password redis的password
cluster-nodes redis的集群节点,ip和端口之间用英文冒号分隔,多个ip端口用英文逗号分割
master.name redis的sentinel模式的master节点的名称
sentinels.info redis的sentinel模式的info信息
sentinels.password redis的sentinel模式的密码
database redis的database,一般是0~15
command redis的命令,作为流表时支持BLPOP、BRPOP、LPOP、RPOP、SPOP;作为维表时支持GET、HGET;作为sink表时支持LPUSH、RPUSH、SADD、SET、HSET
redis-mode redis的部署模式,single、cluster、sentinel
key redis需要访问的key,比如数据是以某个固定的key存放在redis里,值是一个list;redis执行lpush、rpush、sadd、hset等sink使用的命令时的key;
timeout 连接redis的超时时间,单位毫秒
max-total 连接redis的连接池的最大连接数
max-idle 连接redis的连接池的最大空闲数
min-idle 连接redis的连接池的最小空闲数
format 格式化数据格式,如json、csv
batch-fetch-rows 像LPOP、BLPOP、RPOP、BRPOP这种命令每次从redis拿到数据的条数
lookup.cache.max-rows 作为维表lookup模式,缓存在内存中的数据的最大条数
lookup.cache.ttl 作为维表lookup模式,缓存在内存中的数据的ttl超时时间,单位秒
lookup.max-retries 作为维表lookup模式,查找数据的失败重试次数
lookup.cache.load-all 作为维表lookup模式,查找数据是否加载所有,主要是针对hget命令,如:HGET KEY_NAME FIELD_NAME;是否根据key查出所有field的值,这里可以根据实际hash表的大小决定是否要查询所有出来缓存起来
sink.max-retries redis作为sink源时,最大重试次数
sink.parallelism redis作为sink源时,sink的并行数,默认并行度为核心数
sink.key.ttl redis作为sink源时,sink的数据保存在redis的ttl超时时间,单位秒,默认为-1表示长期保存
lookup.max-retries 作为维表lookup模式,查找数据的失败重试次数

源码地址:https://gitee.com/rongdi/flinksql-connector-redis/

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