Package org.apache.pulsar.broker.loadbalance.extensions.channel

Class ServiceUnitStateMetadataStoreTableViewImpl

java.lang.Object

org.apache.pulsar.broker.loadbalance.extensions.channel.ServiceUnitStateMetadataStoreTableViewImpl

All Implemented Interfaces:

Closeable, AutoCloseable, ServiceUnitStateTableView

public class ServiceUnitStateMetadataStoreTableViewImpl
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
protected static final String	INVALID_STATE_ERROR_MSG
static final String	PATH_PREFIX

Constructor Summary

Constructors

Constructor	Description
ServiceUnitStateMetadataStoreTableViewImpl()

Method Summary

Modifier and Type	Method	Description
void	close()	Closes the tableview.
CompletableFuture<Void>	delete(String key)	Tries to delete the item from the persistent store.
Set<Map.Entry<String,ServiceUnitStateData>>	entrySet()	Returns the entry set of the items in the local tableview.
void	flush(long waitDurationInMillis)	Tries to flush any batched or buffered updates.
ServiceUnitStateData	get(String key)	Gets one item from the local tableview.
protected void	init(PulsarService pulsar)
Set<NamespaceBundle>	ownedServiceUnits()	Returns service units (namespace bundles) owned by this broker.
CompletableFuture<Void>	put(String key, @NonNull ServiceUnitStateData value)	Tries to put the item in the persistent store.
protected boolean	resolveConflict(ServiceUnitStateData prev, ServiceUnitStateData cur)
void	start(PulsarService pulsar, BiConsumer<String,ServiceUnitStateData> tailItemListener, BiConsumer<String,ServiceUnitStateData> existingItemListener)	Starts the tableview.
protected void	updateOwnedServiceUnits(String key, ServiceUnitStateData val)
protected boolean	validateServiceUnitPath(String path)

Methods inherited from class java.lang.Object

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

Field Details

PATH_PREFIX

public static final String PATH_PREFIX

See Also:

• Constant Field Values

INVALID_STATE_ERROR_MSG

protected static final String INVALID_STATE_ERROR_MSG

See Also:

• Constant Field Values

Constructor Details

ServiceUnitStateMetadataStoreTableViewImpl

public ServiceUnitStateMetadataStoreTableViewImpl()

Method Details

start

public void start(PulsarService pulsar,
 BiConsumer<String,ServiceUnitStateData> tailItemListener,
 BiConsumer<String,ServiceUnitStateData> existingItemListener)
           throws org.apache.pulsar.metadata.api.MetadataStoreException

Description copied from interface: ServiceUnitStateTableView

Starts the tableview. It initially populates its local table view by scanning existing items in the remote store, and it starts listening to service unit ownership changes from the remote store.

Parameters:

pulsar - pulsar service reference

tailItemListener - listener to listen tail(newly updated) items

existingItemListener - listener to listen existing items

Throws:

org.apache.pulsar.metadata.api.MetadataStoreException

resolveConflict

protected boolean resolveConflict(ServiceUnitStateData prev,
 ServiceUnitStateData cur)

validateServiceUnitPath

protected boolean validateServiceUnitPath(String path)

close

public void close()
           throws IOException

Description copied from interface: ServiceUnitStateTableView

Closes the tableview.

Throws:

IOException - if it fails to close the tableview.

get

public ServiceUnitStateData get(String key)

Description copied from interface: ServiceUnitStateTableView

Gets one item from the local tableview.

Parameters:

key - the key to get

Returns:

value if exists. Otherwise, null.

put

public CompletableFuture<Void> put(String key,
 @NonNull
 @NonNull ServiceUnitStateData value)

Description copied from interface: ServiceUnitStateTableView

Tries to put the item in the persistent store. If it completes, all peer tableviews (including the local one) will be notified and be eventually consistent with this put value. It ignores put operation if the input value conflicts with the existing one in the persistent store.

Parameters:

key - the key to put

value - the value to put

Returns:

a future to track the completion of the operation

flush

public void flush(long waitDurationInMillis)

Description copied from interface: ServiceUnitStateTableView

Tries to flush any batched or buffered updates.

Parameters:

waitDurationInMillis - time to wait until complete.

delete

public CompletableFuture<Void> delete(String key)

Description copied from interface: ServiceUnitStateTableView

Tries to delete the item from the persistent store. All peer tableviews (including the local one) will be notified and be eventually consistent with this deletion. It ignores delete operation if the key is not present in the persistent store.

Parameters:

key - the key to delete

Returns:

a future to track the completion of the operation

entrySet

public Set<Map.Entry<String,ServiceUnitStateData>> entrySet()

Description copied from interface: ServiceUnitStateTableView

Returns the entry set of the items in the local tableview.

Returns:

entry set

init

protected void init(PulsarService pulsar)
             throws org.apache.pulsar.metadata.api.MetadataStoreException

Throws:

org.apache.pulsar.metadata.api.MetadataStoreException

ownedServiceUnits

public Set<NamespaceBundle> ownedServiceUnits()

Description copied from interface: ServiceUnitStateTableView

Returns service units (namespace bundles) owned by this broker.

Specified by:

ownedServiceUnits in interface ServiceUnitStateTableView

Returns:

a set of owned service units (namespace bundles)

updateOwnedServiceUnits

protected void updateOwnedServiceUnits(String key,
 ServiceUnitStateData val)