作为spark程序员,使用python实现以下逻辑:有一个employee表,包含id,name字段,想通过http api输入id,获取address,此api的每次调用只接收10个id批量调用。
时间: 2024-04-17 10:23:11 浏览: 85
您可以使用Python编写一个Spark程序来实现这个逻辑。下面是一个简单的示例代码:
```python
from pyspark.sql import SparkSession
from pyspark.sql.functions import col
import requests
# 创建SparkSession
spark = SparkSession.builder.appName("EmployeeAPI").getOrCreate()
# 读取employee表数据
employee_df = spark.read.format("jdbc").options(
url="jdbc:mysql://localhost:3306/database_name",
driver="com.mysql.jdbc.Driver",
dbtable="employee",
user="your_username",
password="your_password"
).load()
# 定义API请求函数
def get_address(ids):
url = "http://api.example.com/get_address"
params = {"ids": ",".join(ids)}
response = requests.get(url, params=params)
data = response.json()
return data
# 定义UDF函数
get_address_udf = udf(get_address)
# 注册UDF函数
spark.udf.register("get_address", get_address_udf)
# 定义批量调用函数
def batch_get_address(ids):
return spark.sql(f"SELECT id, name, get_address(id) AS address FROM employee WHERE id IN ({','.join(ids)})")
# 注册批量调用函数
spark.udf.register("batch_get_address", batch_get_address)
# 执行批量调用
batch_result = spark.sql("SELECT batch_get_address(id) AS result FROM employee").collect()
# 处理结果
for row in batch_result:
for result in row.result:
print(f"ID: {result.id}, Name: {result.name}, Address: {result.address}")
# 停止SparkSession
spark.stop()
```
请注意,这只是一个简单的示例,您可能需要根据实际情况进行适当的修改和调整。另外,您还需要根据您的数据库和API的实际情况进行相应的配置和调整。
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