BigtableChangeStreamAccessor (google-cloud-platform 2.68.0 API)

java.lang.Object
- org.apache.beam.sdk.io.gcp.bigtable.changestreams.dao.BigtableChangeStreamAccessor

All Implemented Interfaces:

java.lang.AutoCloseable
```
@Internal
public class BigtableChangeStreamAccessor
extends java.lang.Object
implements java.lang.AutoCloseable
```
This is probably a temporary solution to what is a bigger migration from cloud-bigtable-client-core to java-bigtable.
This class creates and maintains the lifecycle java-bigtable clients to interact with Cloud Bigtable. This class creates singletons of data and admin clients for each project/instance/table/app profile. Per workers, there should only be 1 instance of the client for each table/app profile. This ensures we're not creating many/excessive connections with the backend and the jobs on the same machine shares the same sets of connections.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`close()`
`com.google.cloud.bigtable.data.v2.BigtableDataClient`	`getDataClient()`
`com.google.cloud.bigtable.admin.v2.BigtableInstanceAdminClient`	`getInstanceAdminClient()`
`static BigtableChangeStreamAccessor`	`getOrCreate(@NonNull BigtableConfig bigtableConfig)`	Create a BigtableAccess if it doesn't exist and store it in the cache for faster access.
`com.google.cloud.bigtable.admin.v2.BigtableTableAdminClient`	`getTableAdminClient()`
`static void`	`setReadChangeStreamTimeout(org.threeten.bp.Duration timeout)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

close
```
public void close()
```
Specified by:

close in interface java.lang.AutoCloseable

setReadChangeStreamTimeout

public static void setReadChangeStreamTimeout(org.threeten.bp.Duration timeout)

getOrCreate
```
public static BigtableChangeStreamAccessor getOrCreate(@NonNull BigtableConfig bigtableConfig)
                                                throws java.io.IOException
```
Create a BigtableAccess if it doesn't exist and store it in the cache for faster access. If it does exist, just return it.

Parameters:

bigtableConfig - config that contains all the parameters to connect to a Cloud Bigtable instance

Returns:

data and admin clients connected to the Cloud Bigtable instance

Throws:

java.io.IOException - if the connection fails

getDataClient

public com.google.cloud.bigtable.data.v2.BigtableDataClient getDataClient()

getTableAdminClient

public com.google.cloud.bigtable.admin.v2.BigtableTableAdminClient getTableAdminClient()

getInstanceAdminClient

public com.google.cloud.bigtable.admin.v2.BigtableInstanceAdminClient getInstanceAdminClient()