Package org.apache.pulsar.functions.utils.functioncache

Interface FunctionCacheManager

All Superinterfaces:

AutoCloseable

All Known Implementing Classes:

FunctionCacheManagerImpl

public interface FunctionCacheManager
extends AutoCloseable

A cache manager for caching function code and its dependencies.

Method Summary

Modifier and Type	Method	Description
void	close()	Close the cache manager to release created class loaders.
ClassLoader	getClassLoader(String fid)	Returns the function code class loader associated with id.
default void	registerFunction(String fid, List<String> requiredJarFiles, List<URL> requiredClasspaths)	Registers a function with its required jar files and classpaths.
void	registerFunctionInstance(String fid, String eid, List<String> requiredJarFiles, List<URL> requiredClasspaths)
void	registerFunctionInstanceWithArchive(String fid, String eid, String narArchive, String narExtractionDirectory)
default void	unregisterFunction(String fid)	Unregisters a job from the function cache manager.
void	unregisterFunctionInstance(String fid, String eid)

Method Details

getClassLoader

ClassLoader getClassLoader(String fid)

Returns the function code class loader associated with id.

Parameters:

fid - function id

Returns:

class loader which can load the function code.

registerFunction

default void registerFunction(String fid,
 List<String> requiredJarFiles,
 List<URL> requiredClasspaths)
                       throws IOException

Registers a function with its required jar files and classpaths.

The jar files are identified by their blob keys and downloaded for use by a ClassLoader.

Parameters:

fid - function id

requiredJarFiles - collection of blob keys identifying the required jar files.

requiredClasspaths - collection of classpaths that are added to the function code class loader.

Throws:

IOException

registerFunctionInstance

void registerFunctionInstance(String fid,
 String eid,
 List<String> requiredJarFiles,
 List<URL> requiredClasspaths)
                       throws IOException

Throws:

IOException

registerFunctionInstanceWithArchive

void registerFunctionInstanceWithArchive(String fid,
 String eid,
 String narArchive,
 String narExtractionDirectory)
                                  throws IOException

Throws:

IOException

unregisterFunction

default void unregisterFunction(String fid)

Unregisters a job from the function cache manager.

Parameters:

fid - function id

unregisterFunctionInstance

void unregisterFunctionInstance(String fid,
 String eid)

close

void close()

Close the cache manager to release created class loaders.

Specified by:

close in interface AutoCloseable