LibraryCacheManager (Flink : Runtime 2.1.1 API)

All Known Implementing Classes:

BlobLibraryCacheManager
```
public interface LibraryCacheManager
```
The LibraryCacheManager is responsible for creating and managing the user code class loaders.
In order to obtain a user code class loader, one first needs to obtain a LibraryCacheManager.ClassLoaderLease for a given JobID. At first, the LibraryCacheManager.ClassLoaderLease is unresolved. In order to obtain the user class loader one needs to resolve it by specifying the required jar files and class paths. The user code class loader for a job is valid as long as there exists a valid LibraryCacheManager.ClassLoaderLease. A LibraryCacheManager.ClassLoaderLease becomes invalid once it gets released.

Nested Class Summary

Nested Classes
Modifier and Type	Interface	Description
`static interface`	`LibraryCacheManager.ClassLoaderHandle`	Handle to retrieve a user code class loader for the associated job.
`static interface`	`LibraryCacheManager.ClassLoaderLease`	Lease which allows to signal when the user code class loader is no longer needed.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`LibraryCacheManager.ClassLoaderLease`	`registerClassLoaderLease(org.apache.flink.api.common.JobID jobId)`	Registers a new class loader lease for the given jobId.
`void`	`shutdown()`	Shuts the library cache manager down.

- Method Detail
  - registerClassLoaderLease
```
LibraryCacheManager.ClassLoaderLease registerClassLoaderLease(org.apache.flink.api.common.JobID jobId)
```
    Registers a new class loader lease for the given jobId. The user code class loader for this job will be valid as long as there exists a valid lease for this job.
    
    Parameters:
    
    jobId - jobId for which to register a new class loader lease
    
    Returns:
    
    a new class loader lease for the given job
  - shutdown
```
void shutdown()
```
    Shuts the library cache manager down. Thereby it will close all open LibraryCacheManager.ClassLoaderLease and release all registered user code class loaders.