org.apache.storm.localizer

Class LocalizedResource

java.lang.Object

org.apache.storm.localizer.LocallyCachedBlob

org.apache.storm.localizer.LocalizedResource

public class LocalizedResource
extends LocallyCachedBlob

Represents a resource that is localized on the supervisor. A localized resource has a .current symlink to the current version file which is named filename.{current version}. There is also a filename.version which contains the latest version.

Field Summary

Fields inherited from class org.apache.storm.localizer.LocallyCachedBlob

NOT_DOWNLOADED_VERSION

Method Summary

Modifier and Type	Method and Description
void	cleanupOrphanedData() Clean up any temporary files.
protected void	commitNewVersion(long version) Commit the new version and make it available for the end user.
void	completelyRemove() Completely remove anything that is cached locally for this blob and all tracking files also stored for it.
boolean	equals(Object other)
long	fetchUnzipToTemp(ClientBlobStore store) Download the latest version to a temp location.
long	getLocalVersion() Get the version of the blob cached locally.
long	getRemoteVersion(ClientBlobStore store) Get the version of the blob in the blob store.
long	getSizeOnDisk() Get the amount of disk space that is used by this blob.
int	hashCode()
boolean	isFullyDownloaded()
protected void	setSize(long size)
String	toString()

Methods inherited from class org.apache.storm.localizer.LocallyCachedBlob

addReference, fetch, getDependencies, getKey, getLastUsed, getSizeOnDisk, informReferencesAndCommitNewVersion, isUsed, removeReference, touch

Methods inherited from class java.lang.Object

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

Method Detail

setSize

protected void setSize(long size)

getLocalVersion

public long getLocalVersion()

Description copied from class: LocallyCachedBlob

Get the version of the blob cached locally. If the version is unknown or it has not been downloaded NOT_DOWNLOADED_VERSION should be returned. PRECONDITION: this can only be called with a lock on this instance held.

Specified by:

getLocalVersion in class LocallyCachedBlob

getRemoteVersion

public long getRemoteVersion(ClientBlobStore store)
                      throws KeyNotFoundException,
                             AuthorizationException

Description copied from class: LocallyCachedBlob

Get the version of the blob in the blob store. PRECONDITION: this can only be called with a lock on this instance held.

Specified by:

getRemoteVersion in class LocallyCachedBlob

Throws:

KeyNotFoundException

AuthorizationException

fetchUnzipToTemp

public long fetchUnzipToTemp(ClientBlobStore store)
                      throws IOException,
                             KeyNotFoundException,
                             AuthorizationException

Description copied from class: LocallyCachedBlob

Download the latest version to a temp location. This may also include unzipping some or all of the data to a temp location. PRECONDITION: this can only be called with a lock on this instance held.

Specified by:

fetchUnzipToTemp in class LocallyCachedBlob

Parameters:

store - the store to us to download the data.

Returns:

the version that was downloaded.

Throws:

IOException

KeyNotFoundException

AuthorizationException

commitNewVersion

protected void commitNewVersion(long version)
                         throws IOException

Description copied from class: LocallyCachedBlob

Commit the new version and make it available for the end user. PRECONDITION: uncompressToTempLocationIfNeeded will have been called. PRECONDITION: this can only be called with a lock on this instance held.

Specified by:

commitNewVersion in class LocallyCachedBlob

Parameters:

version - the version of the blob to commit.

Throws:

IOException

cleanupOrphanedData

public void cleanupOrphanedData()
                         throws IOException

Description copied from class: LocallyCachedBlob

Clean up any temporary files. This will be called after updating a blob, either successfully or if an error has occured. The goal is to find any files that may be left over and remove them so space is not leaked. PRECONDITION: this can only be called with a lock on this instance held.

Specified by:

cleanupOrphanedData in class LocallyCachedBlob

Throws:

IOException

completelyRemove

public void completelyRemove()
                      throws IOException

Description copied from class: LocallyCachedBlob

Completely remove anything that is cached locally for this blob and all tracking files also stored for it. This will be called after the blob was determined to no longer be needed in the cache. PRECONDITION: this can only be called with a lock on this instance held.

Specified by:

completelyRemove in class LocallyCachedBlob

Throws:

IOException

getSizeOnDisk

public long getSizeOnDisk()

Description copied from class: LocallyCachedBlob

Get the amount of disk space that is used by this blob. If the blob is uncompressed it should be the sum of the space used by all of the uncompressed files. In general this will not be called with any locks held so it is a good idea to cache it and updated it when committing a new version.

Specified by:

getSizeOnDisk in class LocallyCachedBlob

isFullyDownloaded

public boolean isFullyDownloaded()

Specified by:

isFullyDownloaded in class LocallyCachedBlob

equals

public boolean equals(Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object