Package com.atlassian.bamboo.cluster.tape

Class TapePerNodeLocalQueue

java.lang.Object

com.atlassian.bamboo.cluster.tape.TapePerNodeLocalQueue

All Implemented Interfaces:

PerNodeLocalQueue

public class TapePerNodeLocalQueue
extends Object
implements PerNodeLocalQueue

Nested Class Summary

Nested classes/interfaces inherited from interface com.atlassian.bamboo.cluster.tape.PerNodeLocalQueue

PerNodeLocalQueue.QueueId

Field Summary

Fields inherited from interface com.atlassian.bamboo.cluster.tape.PerNodeLocalQueue

NUMBER_OF_PHYSICAL_QUEUES_PER_NODE

Constructor Summary

Constructors

Constructor	Description
TapePerNodeLocalQueue(File localDirectoryForQueues, BambooNodeInfo node, int nodeQueueNumber, Supplier<com.squareup.tape.FileObjectQueue.Converter<CrossNodesEvent>> tapePerNodeLocalQueueConverterSupplier, int maxQueueSize, int maxQueueUsedBytes)

Method Summary

Modifier and Type	Method	Description
boolean	add(CrossNodesEvent data)	transactional add of CrossNodesEvent to the queue; when operation finished we "guarantee" that the CrossNodesEvent is persisted
void	backupQueue(String prefix)	Note: use with caution This method is mainly designed to handle critical state of the queue storage by backing up the current queue persistent store and recreating a new one.
void	close()	closes the queue and all resources connected with this queue (like processing thread(s), files); closing a queue is definitive - it will never be open (i.e.
static TapePerNodeLocalQueue	create(File localDirectoryForQueues, BambooNodeInfo node, int nodeQueueNumber)
boolean	equals(Object o)
@NotNull Optional<Path>	getQueueFilePath()
int	hashCode()
boolean	hasPermission()
@NotNull PerNodeLocalQueue.QueueId	id()
boolean	isClosed()	Some operations (like PerNodeLocalQueue.add(CrossNodesEvent)) on a closed queue will throw a IllegalStateException.
@NotNull String	name()
@Nullable CrossNodesEvent	peek()	Allows to see what's on the head of the queue without removing it.
void	remove()	Remove CrossNodesEvent from head of the queue.
int	size()
@Nullable Long	usableSpaceInBytes()

Methods inherited from class java.lang.Object

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

Constructor Details

TapePerNodeLocalQueue

public TapePerNodeLocalQueue(File localDirectoryForQueues,
 BambooNodeInfo node,
 int nodeQueueNumber,
 Supplier<com.squareup.tape.FileObjectQueue.Converter<CrossNodesEvent>> tapePerNodeLocalQueueConverterSupplier,
 int maxQueueSize,
 int maxQueueUsedBytes)
                      throws IOException

Throws:

IOException

Method Details

close

public void close()

Description copied from interface: PerNodeLocalQueue

closes the queue and all resources connected with this queue (like processing thread(s), files); closing a queue is definitive - it will never be open (i.e. not-closed) again;

Specified by:

close in interface PerNodeLocalQueue

isClosed

public boolean isClosed()

Description copied from interface: PerNodeLocalQueue

Some operations (like PerNodeLocalQueue.add(CrossNodesEvent)) on a closed queue will throw a IllegalStateException. This method allows to check if the queue has not been closed.

Specified by:

isClosed in interface PerNodeLocalQueue

Returns:

true if queue is closed

name

@NotNull
public @NotNull String name()

Specified by:

name in interface PerNodeLocalQueue

Returns:

name of the queue could be useful for the user, like identifying the queue file path from logs

id

@NotNull
public @NotNull PerNodeLocalQueue.QueueId id()

Specified by:

id in interface PerNodeLocalQueue

Returns:

queue id which uniquely identifies this queue, i.e destination node and nodeQueueNumber, see PerNodeLocalQueue.QueueId

add

public boolean add(CrossNodesEvent data)
            throws IllegalStateException

Description copied from interface: PerNodeLocalQueue

transactional add of CrossNodesEvent to the queue; when operation finished we "guarantee" that the CrossNodesEvent is persisted

Specified by:

add in interface PerNodeLocalQueue

Returns:

true if message was added or false if dropped (like exceeding queue size limit)

Throws:

IllegalStateException - when queue is closed

peek

@Nullable
public @Nullable CrossNodesEvent peek()
                               throws IllegalStateException

Description copied from interface: PerNodeLocalQueue

Allows to see what's on the head of the queue without removing it.

Specified by:

peek in interface PerNodeLocalQueue

Returns:

crossNodesEvent from queue head or null when queue is empty.

Throws:

IllegalStateException - when queue is closed

remove

public void remove()
            throws NoSuchElementException,
IllegalStateException

Description copied from interface: PerNodeLocalQueue

Remove CrossNodesEvent from head of the queue.

Specified by:

remove in interface PerNodeLocalQueue

Throws:

NoSuchElementException - when doing a remove on an empty queue

IllegalStateException - when queue is closed

getQueueFilePath

@NotNull
public @NotNull Optional<Path> getQueueFilePath()

Specified by:

getQueueFilePath in interface PerNodeLocalQueue

Returns:

the queue file path if exists, empty otherwise

hasPermission

public boolean hasPermission()

Specified by:

hasPermission in interface PerNodeLocalQueue

Returns:

true if it has read/write access to queue storage

usableSpaceInBytes

@Nullable
public @Nullable Long usableSpaceInBytes()

Specified by:

usableSpaceInBytes in interface PerNodeLocalQueue

Returns:

number of bytes left on device where this queue is stored or null if unable to get this value

size

public int size()

Specified by:

size in interface PerNodeLocalQueue

Returns:

number of elements in this queue

backupQueue

public void backupQueue(String prefix)
                 throws IOException

Description copied from interface: PerNodeLocalQueue

Note: use with caution This method is mainly designed to handle critical state of the queue storage by backing up the current queue persistent store and recreating a new one. Renames current queue file name to [prefix]_[queue_file_name] and re-creates queue file with [queue_file_name]. If file with [prefix]_[queue_file_name] already exists it will be deleted. Note that if PerNodeLocalQueue.backupQueue(String) is called between PerNodeLocalQueue.peek() and PerNodeLocalQueue.remove() this can cause PerNodeLocalQueue.remove() to delete a different CrossNodesEvent then expected or may throw NoSuchElementException if the new queue after PerNodeLocalQueue.backupQueue(String) is empty.

Specified by:

backupQueue in interface PerNodeLocalQueue

Throws:

IOException

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

create

public static TapePerNodeLocalQueue create(File localDirectoryForQueues,
 BambooNodeInfo node,
 int nodeQueueNumber)
                                    throws IOException

Throws:

IOException