flinksql读写redis

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 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 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 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 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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原文地址：https://www.cnblogs.com/rongdi/p/16777702.html