Package io.debezium.connector.mongodb

Class ConnectionContext.MongoPreferredNode

java.lang.Object

io.debezium.connector.mongodb.ConnectionContext.MongoPreferredNode

Direct Known Subclasses:

ConnectionContext.MongoPrimary

Enclosing class:

ConnectionContext

public static class ConnectionContext.MongoPreferredNode
extends Object

A supplier of a client that connects only to node of preferred type from a replica set. Operations on this node will continue

Field Summary

Fields

Modifier and Type	Field	Description
private final Supplier<com.mongodb.client.MongoClient>	connectionSupplier
private final BiConsumer<String,Throwable>	errorHandler
private final Filters	filters
private final com.mongodb.ReadPreference	preference
private final ReplicaSet	replicaSet
private final AtomicBoolean	running

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	MongoPreferredNode(ConnectionContext context, ReplicaSet replicaSet, com.mongodb.ReadPreference preference, Filters filters, BiConsumer<String,Throwable> errorHandler)

Method Summary

Modifier and Type	Method	Description
com.mongodb.ServerAddress	address()	Get the address of the node with preferred type, if there is one.
List<CollectionId>	collections()	Use a node of preferred type to get the identifiers of all the collections in the replica set, applying the current collection filter configuration.
Set<String>	databaseNames()	Use a node of preferred type to get the names of all the databases in the replica set, applying the current database filter configuration.
void	execute(String desc, Consumer<com.mongodb.client.MongoClient> operation)	Execute the supplied operation using the preferred node, blocking until it is available.
<T> T	execute(String desc, Function<com.mongodb.client.MongoClient,T> operation)	Execute the supplied operation using the preferred node, blocking until it is available.
void	executeBlocking(String desc, BlockingConsumer<com.mongodb.client.MongoClient> operation)	Execute the supplied operation using the preferred node, blocking until it is available.
com.mongodb.ReadPreference	getPreference()	Get read preference of
private boolean	isRunning()
ReplicaSet	replicaSet()	Get the replica set.
void	stop()	Terminates the execution loop of the current primary

Methods inherited from class java.lang.Object

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

Field Details

replicaSet

private final ReplicaSet replicaSet

connectionSupplier

private final Supplier<com.mongodb.client.MongoClient> connectionSupplier

filters

private final Filters filters

errorHandler

private final BiConsumer<String,Throwable> errorHandler

running

private final AtomicBoolean running

preference

private final com.mongodb.ReadPreference preference

Constructor Details

MongoPreferredNode

protected MongoPreferredNode(ConnectionContext context,
 ReplicaSet replicaSet,
 com.mongodb.ReadPreference preference,
 Filters filters,
 BiConsumer<String,Throwable> errorHandler)

Method Details

replicaSet

public ReplicaSet replicaSet()

Get the replica set.

Returns:

the replica set; never null

getPreference

public com.mongodb.ReadPreference getPreference()

Get read preference of

Returns:

the read preference

address

public com.mongodb.ServerAddress address()

Get the address of the node with preferred type, if there is one.

Returns:

the address of the replica set's preferred node, or null if there is currently no node of preferred type

execute

public void execute(String desc,
 Consumer<com.mongodb.client.MongoClient> operation)

Execute the supplied operation using the preferred node, blocking until it is available. Whenever the operation stops (e.g., if the node is no longer of preferred type), then restart the operation using a current node of that type.

Parameters:

desc - the description of the operation, for logging purposes

operation - the operation to be performed on a node of preferred type.

execute

public <T> T execute(String desc,
 Function<com.mongodb.client.MongoClient,T> operation)

Execute the supplied operation using the preferred node, blocking until it is available. Whenever the operation stops (e.g., if the node is no longer of preferred type), then restart the operation using a current node of that type.

Parameters:

desc - the description of the operation, for logging purposes

operation - the operation to be performed on a node of preferred type

Returns:

return value of the executed operation

executeBlocking

public void executeBlocking(String desc,
 BlockingConsumer<com.mongodb.client.MongoClient> operation)
                     throws InterruptedException

Execute the supplied operation using the preferred node, blocking until it is available. Whenever the operation stops (e.g., if the node is no longer of preferred type), then restart the operation using a current node of that type.

Parameters:

desc - the description of the operation, for logging purposes

operation - the operation to be performed on a node of preferred type.

Throws:

InterruptedException - if the operation was interrupted

databaseNames

public Set<String> databaseNames()

Use a node of preferred type to get the names of all the databases in the replica set, applying the current database filter configuration. This method will block until a node of preferred type can be obtained to get the names of all databases in the replica set.

Returns:

the database names; never null but possibly empty

collections

public List<CollectionId> collections()

Use a node of preferred type to get the identifiers of all the collections in the replica set, applying the current collection filter configuration. This method will block until a primary can be obtained to get the identifiers of all collections in the replica set.

Returns:

the collection identifiers; never null

isRunning

private boolean isRunning()

stop

public void stop()

Terminates the execution loop of the current primary