Package hudson.model

Class FingerprintMap

java.lang.Object

hudson.util.KeyedDataStorage<Fingerprint,hudson.model.FingerprintMap.FingerprintParams>

hudson.model.FingerprintMap

public final class FingerprintMap
extends KeyedDataStorage<Fingerprint,hudson.model.FingerprintMap.FingerprintParams>

Cache of Fingerprints.

This implementation makes sure that no two Fingerprint objects lie around for the same hash code, and that unused Fingerprint will be adequately GC-ed to prevent memory leak.

Author:

Kohsuke Kawaguchi

See Also:

• Jenkins.getFingerprintMap()

Field Summary

Fields inherited from class hudson.util.KeyedDataStorage

cacheHit, loadFailure, totalQuery, weakRefLost

Constructor Summary

Constructors

Constructor	Description
FingerprintMap()

Method Summary

Modifier and Type	Method	Description
protected Fingerprint	create(String md5sum, hudson.model.FingerprintMap.FingerprintParams createParams)	Creates a new data object.
protected Fingerprint	get(String md5sum, boolean createIfNotExist, hudson.model.FingerprintMap.FingerprintParams createParams)	Implementation of get/getOrCreate.
Fingerprint	getOrCreate(AbstractBuild build, String fileName, byte[] md5sum)
Fingerprint	getOrCreate(AbstractBuild build, String fileName, String md5sum)
Fingerprint	getOrCreate(Run build, String fileName, String md5sum)
boolean	isReady()	Returns true if there's some data in the fingerprint database.
protected Fingerprint	load(String key)	Attempts to load an existing data object from disk.

Methods inherited from class hudson.util.KeyedDataStorage

get, getOrCreate, getPerformanceStats, resetPerformanceStats

Methods inherited from class java.lang.Object

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

Constructor Details

FingerprintMap

public FingerprintMap()

Method Details

isReady

public boolean isReady()

Returns true if there's some data in the fingerprint database.

getOrCreate

@NonNull
public Fingerprint getOrCreate(@CheckForNull
 AbstractBuild build,
 @NonNull
 String fileName,
 @NonNull
 byte[] md5sum)
                        throws IOException

Parameters:

build - set to non-null if Fingerprint to be created (if so) will have this build as the owner. Otherwise null, to indicate an owner-less build.

Throws:

IOException - Loading error

getOrCreate

@NonNull
public Fingerprint getOrCreate(@CheckForNull
 AbstractBuild build,
 @NonNull
 String fileName,
 @NonNull
 String md5sum)
                        throws IOException

Throws:

IOException

getOrCreate

@NonNull
public Fingerprint getOrCreate(@CheckForNull
 Run build,
 @NonNull
 String fileName,
 @NonNull
 String md5sum)
                        throws IOException

Throws:

IOException

get

protected Fingerprint get(String md5sum,
 boolean createIfNotExist,
 hudson.model.FingerprintMap.FingerprintParams createParams)
                   throws IOException

Description copied from class: KeyedDataStorage

Implementation of get/getOrCreate.

Overrides:

get in class KeyedDataStorage<Fingerprint,hudson.model.FingerprintMap.FingerprintParams>

Returns:

Item with the specified key

Throws:

IOException - Loading error

create

@NonNull
protected Fingerprint create(@NonNull
 String md5sum,
 @NonNull
 hudson.model.FingerprintMap.FingerprintParams createParams)
                      throws IOException

Description copied from class: KeyedDataStorage

Creates a new data object.

This method is called by KeyedDataStorage.getOrCreate(String,Object) if the data that matches the specified key does not exist.

Because of concurrency, another thread might call KeyedDataStorage.get(String) as soon as a new data object is created, so it's important that this method returns a properly initialized "valid" object.

Specified by:

create in class KeyedDataStorage<Fingerprint,hudson.model.FingerprintMap.FingerprintParams>

Returns:

Created item. If construction fails, abort with an exception.

Throws:

IOException - if the method fails to create a new data object, it can throw IOException (or any other exception) and that will be propagated to the caller.

load

@CheckForNull
protected Fingerprint load(@NonNull
 String key)
                    throws IOException

Description copied from class: KeyedDataStorage

Attempts to load an existing data object from disk.

KeyedDataStorage class serializes the requests so that no two threads call the KeyedDataStorage.load(String) method with the same parameter concurrently. This ensures that there's only up to one data object for any key.

Specified by:

load in class KeyedDataStorage<Fingerprint,hudson.model.FingerprintMap.FingerprintParams>

Returns:

null if no such data exists.

Throws:

IOException - if load operation fails. This exception will be propagated to the caller.