org.apache.flink.runtime.execution.librarycache

接口 LibraryCacheManager

所有已知实现类:

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.

嵌套类概要

嵌套类

限定符和类型	接口和说明
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.

方法概要

限定符和类型	方法和说明
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.

方法详细资料

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.

参数:

jobId - jobId for which to register a new class loader lease

返回:

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.