com.google.cloud.hadoop.gcsio.cooplock

Class CoopLockRecordsDao

java.lang.Object

com.google.cloud.hadoop.gcsio.cooplock.CoopLockRecordsDao

public class CoopLockRecordsDao
extends Object

DAO class for CoopLockRecords class (persisted in gs://<BUCKET>/_lock/all.lock file).

Main function of this class is to perform atomic acuisiton and release of a lock for resources specified in CoopLockRecord class.

Field Summary

Fields

Modifier and Type	Field and Description
static String	LOCK_DIRECTORY
static String	LOCK_PATH

Constructor Summary

Constructors

Constructor and Description
CoopLockRecordsDao(GoogleCloudStorageImpl gcs)

Method Summary

Modifier and Type	Method and Description
static com.google.gson.Gson	createGson()
Set<CoopLockRecord>	getLockedOperations(String bucketName)
void	lockPaths(String operationId, Instant operationInstant, CoopLockOperationType operationType, StorageResourceId... resources)
void	relockOperation(String bucketName, CoopLockRecord operationRecord)
void	unlockPaths(String operationId, StorageResourceId... resources)

Methods inherited from class java.lang.Object

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

Field Detail

LOCK_DIRECTORY

public static final String LOCK_DIRECTORY

See Also:

Constant Field Values

LOCK_PATH

public static final String LOCK_PATH

See Also:

Constant Field Values

Constructor Detail

CoopLockRecordsDao

public CoopLockRecordsDao(GoogleCloudStorageImpl gcs)

Method Detail

getLockedOperations

public Set<CoopLockRecord> getLockedOperations(String bucketName)
                                        throws IOException

Throws:

IOException

relockOperation

public void relockOperation(String bucketName,
                            CoopLockRecord operationRecord)
                     throws IOException

Throws:

IOException

lockPaths

public void lockPaths(String operationId,
                      Instant operationInstant,
                      CoopLockOperationType operationType,
                      StorageResourceId... resources)
               throws IOException

Throws:

IOException

unlockPaths

public void unlockPaths(String operationId,
                        StorageResourceId... resources)
                 throws IOException

Throws:

IOException

createGson

public static com.google.gson.Gson createGson()