程序包 org.apache.pulsar.functions.instance.state

接口 StateStoreProvider

所有超级接口:

AutoCloseable

所有已知实现类:

BKStateStoreProviderImpl, PulsarMetadataStateStoreProviderImpl

public interface StateStoreProvider
extends AutoCloseable

The State Store Provider provides the state stores for a function.

字段概要

字段

修饰符和类型	字段	说明
static final StateStoreProvider	NULL	The state store provider returns `null` state stores.
static final String	STATE_STORAGE_SERVICE_URL

方法概要

修饰符和类型	方法	说明
void	close()
<S extends org.apache.pulsar.functions.api.StateStore> S	getStateStore(String tenant, String namespace, String name)	Get the state store with the provided store name.
default void	init(Map<String,Object> config, org.apache.pulsar.functions.proto.Function.FunctionDetails functionDetails)	Initialize the state store provider.

字段详细资料

STATE_STORAGE_SERVICE_URL

static final String STATE_STORAGE_SERVICE_URL

另请参阅:

• 常量字段值

NULL

static final StateStoreProvider NULL

The state store provider returns `null` state stores.

方法详细资料

init

default void init(Map<String,Object> config,
 org.apache.pulsar.functions.proto.Function.FunctionDetails functionDetails)
           throws Exception

Initialize the state store provider.

参数:

config - the config to init the state store provider.

functionDetails - the function details.

抛出:

Exception - when failed to init the state store provider.

getStateStore

<S extends org.apache.pulsar.functions.api.StateStore>
S getStateStore(String tenant,
 String namespace,
 String name)
         throws Exception

Get the state store with the provided store name.

类型参数:

S - the type of interface of the store to return

参数:

tenant - the tenant that owns this state store

namespace - the namespace that owns this state store

name - the state store name

返回:

the state store instance.

抛出:

ClassCastException - if the return type isn't a type or interface of the actual returned store.

Exception

close

void close()

指定者:

close 在接口中 AutoCloseable