com.alicloud.openservices.tablestore.timestream

类 TimestreamDBClient

java.lang.Object

com.alicloud.openservices.tablestore.timestream.TimestreamDBClient

所有已实现的接口:

TimestreamDB

public class TimestreamDBClient
extends Object
implements TimestreamDB

Definition of TimestreamDBClient, providing functionalities for table creation/deletion and data read/write.

By default, the backend automatically enables the updateTime timeline update feature, which can be disabled via TimestreamDBConfiguration.dumpMeta.

When the automatic updateTime timeline update feature is enabled (via TimestreamDBConfiguration.dumpMeta), the TimestreamDBClient backend maintains an in-memory cache of recently updated timelines. During data writes, it determines whether the timeline's updateTime needs to be updated (if not present in the cache or if the last update exceeds the configured threshold). If an update is required, a record is inserted into the meta table (updating only updateTime).

The asynchronous API for data writes is implemented through TableStoreWriter. To retrieve the results of asynchronous writes, you can pass a TableStoreCallback, which is shared across all data table writes.

构造器概要

构造器

构造器和说明
TimestreamDBClient(AsyncClient asyncClient, TimestreamDBConfiguration config) Constructor of TimestreamDBClient
TimestreamDBClient(AsyncClient asyncClient, TimestreamDBConfiguration config, WriterConfig writerConfig, TableStoreCallback<RowChange,ConsumedCapacity> callback) Constructor of TimestreamDBClient

方法概要

限定符和类型	方法和说明
void	close() Close the client and release resources.
void	createDataTable(String tableName) Create a data table
void	createMetaTable() Create the meta table without creating indexes for attributes.
void	createMetaTable(List<AttributeIndexSchema> indexForAttributes) Create the meta table and create indexes for the specified attributes.
TimestreamDataTable	dataTable(String tableName) Get the operation object of the data table
void	deleteDataTable(String tableName) Delete the table
void	deleteMetaTable() Delete the meta table
TimestreamMetaTable	metaTable() Get the operation object for the meta table

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

TimestreamDBClient

public TimestreamDBClient(AsyncClient asyncClient,
                          TimestreamDBConfiguration config)

Constructor of TimestreamDBClient

参数:

asyncClient - TableStore asynchronous client

config - Client configuration

TimestreamDBClient

public TimestreamDBClient(AsyncClient asyncClient,
                          TimestreamDBConfiguration config,
                          WriterConfig writerConfig,
                          TableStoreCallback<RowChange,ConsumedCapacity> callback)

Constructor of TimestreamDBClient

参数:

asyncClient - TableStore asynchronous client

config - client configuration

writerConfig - WriterConfig for the TableStoreWriter used by all data tables

callback - Shared TableStoreCallback for the TableStoreWriter used by all data tables

方法详细资料

close

public void close()

从接口复制的说明: TimestreamDB

Close the client and release resources.

Make sure to release resources after all requests have been executed. After releasing resources, no further requests can be sent, and ongoing requests may not return results.

指定者:

close 在接口中 TimestreamDB

createMetaTable

public void createMetaTable()

从接口复制的说明: TimestreamDB

Create the meta table without creating indexes for attributes.

指定者:

createMetaTable 在接口中 TimestreamDB

createMetaTable

public void createMetaTable(List<AttributeIndexSchema> indexForAttributes)

从接口复制的说明: TimestreamDB

Create the meta table and create indexes for the specified attributes.

Attributes must not be reserved fields (h, n, t, s).

指定者:

createMetaTable 在接口中 TimestreamDB

deleteMetaTable

public void deleteMetaTable()

从接口复制的说明: TimestreamDB

Delete the meta table

指定者:

deleteMetaTable 在接口中 TimestreamDB

createDataTable

public void createDataTable(String tableName)

从接口复制的说明: TimestreamDB

Create a data table

指定者:

createDataTable 在接口中 TimestreamDB

参数:

tableName - Name of the data table

deleteDataTable

public void deleteDataTable(String tableName)

从接口复制的说明: TimestreamDB

Delete the table

指定者:

deleteDataTable 在接口中 TimestreamDB

参数:

tableName - the name of the table

dataTable

public TimestreamDataTable dataTable(String tableName)

从接口复制的说明: TimestreamDB

Get the operation object of the data table

指定者:

dataTable 在接口中 TimestreamDB

参数:

tableName - Name of the data table

返回:

metaTable

public TimestreamMetaTable metaTable()

从接口复制的说明: TimestreamDB

Get the operation object for the meta table

指定者:

metaTable 在接口中 TimestreamDB

返回: