org.apache.flink.contrib.streaming.state

接口 OptionsFactory

所有超级接口:

Serializable

所有已知子接口:

ConfigurableOptionsFactory

所有已知实现类:

DefaultConfigurableOptionsFactory

public interface OptionsFactory
extends Serializable

A factory for DBOptions and ColumnFamilyOptions to be passed to the RocksDBStateBackend. Options have to be created lazily by this factory, because the Options class is not serializable and holds pointers to native code.

A typical pattern to use this OptionsFactory is as follows:

 rocksDbBackend.setOptions(new OptionsFactory(){

		public DBOptions createDBOptions(DBOptions currentOptions) {
			return  currentOptions.setMaxOpenFiles(1024);
		}

		public ColumnFamilyOptions createColumnOptions(ColumnFamilyOptions currentOptions) {
			return currentOptions.setCompactionStyle(CompactionStyle.LEVEL);
		}
 });
 

方法概要

限定符和类型	方法和说明
org.rocksdb.ColumnFamilyOptions	createColumnOptions(org.rocksdb.ColumnFamilyOptions currentOptions) This method should set the additional options on top of the current options object.
org.rocksdb.DBOptions	createDBOptions(org.rocksdb.DBOptions currentOptions) This method should set the additional options on top of the current options object.
default RocksDBNativeMetricOptions	createNativeMetricsOptions(RocksDBNativeMetricOptions nativeMetricOptions) This method should enable certain RocksDB metrics to be forwarded to Flink's metrics reporter.

方法详细资料

createDBOptions

org.rocksdb.DBOptions createDBOptions(org.rocksdb.DBOptions currentOptions)

This method should set the additional options on top of the current options object. The current options object may contain pre-defined options based on flags that have been configured on the state backend.

It is important to set the options on the current object and return the result from the setter methods, otherwise the pre-defined options may get lost.

参数:

currentOptions - The options object with the pre-defined options.

返回:

The options object on which the additional options are set.

createColumnOptions

org.rocksdb.ColumnFamilyOptions createColumnOptions(org.rocksdb.ColumnFamilyOptions currentOptions)

This method should set the additional options on top of the current options object. The current options object may contain pre-defined options based on flags that have been configured on the state backend.

It is important to set the options on the current object and return the result from the setter methods, otherwise the pre-defined options may get lost.

参数:

currentOptions - The options object with the pre-defined options.

返回:

The options object on which the additional options are set.

createNativeMetricsOptions

default RocksDBNativeMetricOptions createNativeMetricsOptions(RocksDBNativeMetricOptions nativeMetricOptions)

This method should enable certain RocksDB metrics to be forwarded to Flink's metrics reporter.

Enabling these monitoring options may degrade RockDB performance and should be set with care.

参数:

nativeMetricOptions - The options object with the pre-defined options.

返回:

The options object on which the additional options are set.