Class Default
- java.lang.Object
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- edu.isi.pegasus.planner.selector.replica.Default
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- All Implemented Interfaces:
ReplicaSelector
- Direct Known Subclasses:
Regex
,Restricted
public class Default extends java.lang.Object implements ReplicaSelector
The default replica selector that is used if non is specifed by the user. This gives preference to a replica residing on the same site as the site, where it is required to be staged to. If there is no such replica, then a random replica is selected.In order to use the replica selector implemented by this class,
- the property pegasus.selector.replica must be set to value Default, or the property should be left undefined in the properties.
- Version:
- $Revision$
- Author:
- Karan Vahi
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Field Summary
Fields Modifier and Type Field Description private static java.lang.String
mDescription
A short description of the replica selector.protected LogManager
mLogger
The handle to the logging object that is used to log the various debug messages.protected PegasusProperties
mProps
The properties object containing the properties passed to the planner.-
Fields inherited from interface edu.isi.pegasus.planner.selector.ReplicaSelector
LOCAL_SITE_HANDLE, VERSION
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Constructor Summary
Constructors Constructor Description Default(PegasusProperties properties)
The overloaded constructor, that is called by load method.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.String
description()
Returns a short description of the replica selector.boolean
removeFileURL(ReplicaCatalogEntry rce, java.lang.String preferredSite, boolean allowLocalFileURLs)
A convenience function that determines whether we should be removing a file URL from replica selection or not.protected boolean
removeFileURL(java.lang.String pfn, java.lang.String site, java.lang.String preferredSite, boolean allowLocalFileURLs)
A convenience function that determines whether we should be removing a file URL from replica selection or not.ReplicaCatalogEntry
selectReplica(ReplicaLocation rl, java.lang.String preferredSite, boolean allowLocalFileURLs)
This chooses a location amongst all the locations returned by the replica location service.ReplicaLocation
selectReplicas(ReplicaLocation rl, java.lang.String preferredSite, boolean allowLocalFileURLs)
This chooses a location amongst all the locations returned by the Replica Mechanism.
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Field Detail
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mDescription
private static java.lang.String mDescription
A short description of the replica selector.
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mLogger
protected LogManager mLogger
The handle to the logging object that is used to log the various debug messages.
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mProps
protected PegasusProperties mProps
The properties object containing the properties passed to the planner.
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Constructor Detail
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Default
public Default(PegasusProperties properties)
The overloaded constructor, that is called by load method.- Parameters:
properties
- thePegasusProperties
object containing all the properties required by Pegasus.
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Method Detail
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selectReplica
public ReplicaCatalogEntry selectReplica(ReplicaLocation rl, java.lang.String preferredSite, boolean allowLocalFileURLs)
This chooses a location amongst all the locations returned by the replica location service. If a location is found with re attribute same as the preference pool, it is taken. Else a random location is selected and returned. If more than one location for the lfn is found at the preference pool, then also a random location amongst the ones at the preference pool is selected.- Specified by:
selectReplica
in interfaceReplicaSelector
- Parameters:
rl
- theReplicaLocation
object containing all the pfn's associated with that LFN.preferredSite
- the preffered site for picking up the replicas.allowLocalFileURLs
- indicates whether Replica Selector can select a replica on the local site / submit host.- Returns:
ReplicaCatalogEntry
corresponding to the location selected.- See Also:
org.griphyn.cPlanner.classes.ReplicaLocation
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selectReplicas
public ReplicaLocation selectReplicas(ReplicaLocation rl, java.lang.String preferredSite, boolean allowLocalFileURLs)
This chooses a location amongst all the locations returned by the Replica Mechanism. If a location is found with re/pool attribute same as the preference pool, it is taken. This returns all the locations which match to the preference pool. This function is called to determine if a file does exist on the output pool or not beforehand. We need all the location to ensure that we are able to make a match if it so exists. Else a random location is selected and returned- Specified by:
selectReplicas
in interfaceReplicaSelector
- Parameters:
rl
- theReplicaLocation
object containing all the pfn's associated with that LFN.preferredSite
- the preffered site for picking up the replicas.allowLocalFileURLs
- indicates whether Replica Selector can select a replica on the local site / submit host.- Returns:
ReplicaLocation
corresponding to the replicas selected.- See Also:
org.griphyn.cPlanner.classes.ReplicaLocation
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removeFileURL
public boolean removeFileURL(ReplicaCatalogEntry rce, java.lang.String preferredSite, boolean allowLocalFileURLs)
A convenience function that determines whether we should be removing a file URL from replica selection or not. The file urls make sense only- if associated with the preference site or - if local File URL are allowed and rce is associated with local site
- Parameters:
rce
- the ReplicaCatalogEntry object.preferredSite
- the preferred site.allowLocalFileURLs
- indicates whether Replica Selector can select a replica on the local site / submit host.- Returns:
- boolean
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removeFileURL
protected boolean removeFileURL(java.lang.String pfn, java.lang.String site, java.lang.String preferredSite, boolean allowLocalFileURLs)
A convenience function that determines whether we should be removing a file URL from replica selection or not. The file urls make sense only- if associated with the preference site or - if local File URL are allowed and rce is associated with local site
- Parameters:
pfn
- the file urlsite
- the site associated with the pfn.preferredSite
- the preferred site.allowLocalFileURLs
- indicates whether Replica Selector can select a replica on the local site / submit host.- Returns:
- boolean
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description
public java.lang.String description()
Returns a short description of the replica selector.- Specified by:
description
in interfaceReplicaSelector
- Returns:
- string corresponding to the description.
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