Custom UDF function, saved from hive to mongodb.

(You can debug UDF function through the idea tool, and the second step will provide reference. )

1, the first is the pom.xml file.

2. About mongo's helper class

3. User-defined function MongoStorageHandler entry class

Preparation: First, upload the prepared UDF function jar package and related dependency packages to the server (WinSCP tool can be selected under windows). For example, the UDF function is uploaded to the /home/username/tmp directory, and the dependency package is under /home/username/tmp/lib.

1. Configure remote configuration in idea (as shown in figure 1):

2. Enable the debug mode of the hive:

Configuration unit debugging

3. At this time, we are listening to port 8000 (listening address: Transport DT _ Socket of 8000) and starting the debugging mode of the configured remote controller in the idea;

4. Enter the following command to customize the function name (sign_func):

5. Call the custom function sign_func:

Ok, go to mongodb to see if the data is stored in the mongo library.