org.wso2.registry.inmemory
Class InMemoryRegistry

java.lang.Object
  org.wso2.registry.inmemory.InMemoryRegistry

All Implemented Interfaces:

CoreRegistry, Registry

public class InMemoryRegistry
extends java.lang.Object
implements Registry

In memory implementation of the resourceMap. This implementation stores all the resource content and the metadata in the memory as Maps and Lists. Main use case of this implementation is as a cache for a persistance resourceMap.

Field Summary

protected static org.apache.commons.logging.Log

log

Constructor Summary

InMemoryRegistry()

Method Summary

java.lang.String	addComment(java.lang.String resourcePath, Comment comment) Adds a comment to a resource.
void	applyTag(java.lang.String resourcePath, java.lang.String tag) Applies the given tag to the resource in the given path.
void	delete(java.lang.String path) Deletes a resource from the resourceMap.
void	editComment(java.lang.String commentPath, java.lang.String text) Change the text of an existing comment.
Resource	executeQuery(java.lang.String path, java.util.Map parameters) Executes a custom query which lives at the given path in the Registry.
Resource	get(java.lang.String path) Returns the resource at the given path.
float	getAverageRating(java.lang.String resourcePath) Returns the average rating for the given resource.
Comment[]	getComments(java.lang.String resourcePath) Get all comments for the given resource.
LogEntry[]	getLogs(java.lang.String resourcePath, int action, java.lang.String userName, java.util.Date from, java.util.Date to, boolean recentFirst) Returns the logs of the activities occured in the registy.
int	getRating(java.lang.String path, java.lang.String userName) Returns the rating given to the specified resource by the given user
TaggedResourcePath[]	getResourcePathsWithTag(java.lang.String tag) Returns the paths of all Resources that are tagged with the given tag.
Tag[]	getTags(java.lang.String resourcePath) Returns all tags used for tagging the given resource.
java.lang.String[]	getVersions(java.lang.String path) Get a list of all versions of the resource located at the given path.
java.lang.String	importResource(java.lang.String suggestedPath, java.lang.String sourceURL, Resource metadata) Creates a resource by fetching the resource content from the given URL.
boolean	isResourceAvailable(java.lang.String path)
java.lang.String	put(java.lang.String suggestedPath, Resource resource) Adds or updates resources in the registry.
void	rateResource(java.lang.String resourcePath, int rating) Rate the given resource.
void	removeTag(java.lang.String path, java.lang.String tag) Removes a tag on a resource.
java.lang.String	rename(java.lang.String currentPath, java.lang.String newPath) Move or rename a resource in the registry.
boolean	resourceExists(java.lang.String path) Check whether a resource exists at the given path
void	restoreVersion(java.lang.String versionPath) Reverts a resource to a given version.

Methods inherited from class java.lang.Object

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

Field Detail

log

protected static final org.apache.commons.logging.Log log

Constructor Detail

InMemoryRegistry

public InMemoryRegistry()

Method Detail

get

public Resource get(java.lang.String path)
             throws RegistryException

Description copied from interface: CoreRegistry

Returns the resource at the given path.

Specified by:

get in interface CoreRegistry

Parameters:

path - Path of the resource. e.g. /project1/server/deployment.xml

Returns:

Resource instance

Throws:

RegistryException - is thrown if the resource is not in the registry

resourceExists

public boolean resourceExists(java.lang.String path)
                       throws RegistryException

Description copied from interface: CoreRegistry

Check whether a resource exists at the given path

Specified by:

resourceExists in interface CoreRegistry

Parameters:

path - Path of the resource to be checked

Returns:

true if a resource exists at the given path, false otherwise.

Throws:

RegistryException - if an error occurs

put

public java.lang.String put(java.lang.String suggestedPath,
                            Resource resource)
                     throws RegistryException

Adds or updates resources in the registry. If there is no resource in the given path, resource is added. If a resource already exist in the given path, it will be replaced with the new resource.

Specified by:

put in interface CoreRegistry

Parameters:

suggestedPath - the path which we'd like to use for the new resource.

resource - Resource instance for the new resource

Returns:

the actual path that the server chose to use for our Resource

Throws:

RegistryException

importResource

public java.lang.String importResource(java.lang.String suggestedPath,
                                       java.lang.String sourceURL,
                                       Resource metadata)
                                throws RegistryException

Description copied from interface: Registry

Creates a resource by fetching the resource content from the given URL.

Specified by:

importResource in interface Registry

Parameters:

suggestedPath - path where we'd like to add the new resource. Although this path is specified by the caller of the method, resource may not be actually added at this path.

sourceURL - where to fetch the resource content

metadata - a template Resource

Returns:

actual path to the new resource

Throws:

RegistryException - if we couldn't get or store the new resource

delete

public void delete(java.lang.String path)
            throws RegistryException

Deletes a resource from the resourceMap. If the resource is a normal resource, or a link only the resource will be removed. If it is directory, all descendent resources of that directory will be removed.

NOTE: We are not removing links, if a resource is deleted. It will result in run time exception when a link is accessed. But it is better than removing links, which may have created by some other user. Then the user who is using the link can know the exact reason for the invalid link, than going in to some strange error because his link is deleted without his knowledge.

Specified by:

delete in interface CoreRegistry

Parameters:

path - Path of the resource to be deleted.

Throws:

RegistryException - is thrown depending on the implementation.

rename

public java.lang.String rename(java.lang.String currentPath,
                               java.lang.String newPath)
                        throws RegistryException

Description copied from interface: Registry

Move or rename a resource in the registry. This is equivalent to 1) delete the resource, then 2) add the resource to the new location. The operation is atomic, so if it fails the old resource will still be there.

Specified by:

rename in interface Registry

Parameters:

currentPath - current path of the resource

newPath - where we'd like to move the reosurce

Returns:

the actual path for the new resource

Throws:

RegistryException - if something went wrong

getVersions

public java.lang.String[] getVersions(java.lang.String path)
                               throws RegistryException

Description copied from interface: Registry

Get a list of all versions of the resource located at the given path. Version paths are returned in the form /projects/myresource?v=12

Specified by:

getVersions in interface Registry

Parameters:

path - path of a current version of a resource

Returns:

a String array containing the individual paths of versions

Throws:

RegistryException - if there is an error

restoreVersion

public void restoreVersion(java.lang.String versionPath)
                    throws RegistryException

Description copied from interface: Registry

Reverts a resource to a given version.

Specified by:

restoreVersion in interface Registry

Parameters:

versionPath - path of the version to be reverted. It is not necessary to provide the path of the resource as it can be derived from the version path.

Throws:

RegistryException - if there is an error

applyTag

public void applyTag(java.lang.String resourcePath,
                     java.lang.String tag)
              throws RegistryException

Description copied from interface: Registry

Applies the given tag to the resource in the given path. If the given tag is not defined in the registry, it will be defined.

Specified by:

applyTag in interface Registry

Parameters:

resourcePath - Path of the resource to be tagged.

tag - Tag. Any string can be used for the tag.

Throws:

RegistryException - is thrown if a resource does not exist in the given path.

getResourcePathsWithTag

public TaggedResourcePath[] getResourcePathsWithTag(java.lang.String tag)
                                             throws RegistryException

Description copied from interface: Registry

Returns the paths of all Resources that are tagged with the given tag.

Specified by:

getResourcePathsWithTag in interface Registry

Parameters:

tag - the tag to search for

Returns:

an array of TaggedResourcePaths

Throws:

RegistryException - if an error occurs

getTags

public Tag[] getTags(java.lang.String resourcePath)
              throws RegistryException

Description copied from interface: Registry

Returns all tags used for tagging the given resource.

Specified by:

getTags in interface Registry

Parameters:

resourcePath - Path of the resource

Returns:

Tags tag names

Throws:

RegistryException - is thrown if a resource does not exist in the given path.

removeTag

public void removeTag(java.lang.String path,
                      java.lang.String tag)
               throws RegistryException

Description copied from interface: Registry

Removes a tag on a resource. If the resource at the path is owned by the current user, all taggings done using the given tag will be removed. If the resource is not owned by the current user, only the tagging done by the current user will be removed.

Specified by:

removeTag in interface Registry

Parameters:

path - Resource path tagged with the given tag.

tag - Name of the tag to be removed.

Throws:

RegistryException - if there's a problem

addComment

public java.lang.String addComment(java.lang.String resourcePath,
                                   Comment comment)
                            throws RegistryException

Description copied from interface: Registry

Adds a comment to a resource.

Specified by:

addComment in interface Registry

Parameters:

resourcePath - Path of the resource to add the comment.

comment - Comment instance for the new comment.

Returns:

the path of the new comment.

Throws:

RegistryException - is thrown if a resource does not exist in the given path.

editComment

public void editComment(java.lang.String commentPath,
                        java.lang.String text)
                 throws RegistryException

Description copied from interface: Registry

Change the text of an existing comment.

Specified by:

editComment in interface Registry

Parameters:

commentPath - path to comment resource ("..foo/r1;comment:1")

text - new text for the comment.

Throws:

RegistryException - Registry implementations may handle exceptions and throw RegistryException if the exception has to be propagated to the client.

getComments

public Comment[] getComments(java.lang.String resourcePath)
                      throws RegistryException

Description copied from interface: Registry

Get all comments for the given resource.

Specified by:

getComments in interface Registry

Parameters:

resourcePath - path of the resource.

Returns:

an array of Comment objects.

Throws:

RegistryException - Registry implementations may handle exceptions and throw RegistryException if the exception has to be propagated to the client.

rateResource

public void rateResource(java.lang.String resourcePath,
                         int rating)
                  throws RegistryException

Description copied from interface: Registry

Rate the given resource.

Specified by:

rateResource in interface Registry

Parameters:

resourcePath - Path of the resource.

rating - Rating value between 1 and 5.

Throws:

RegistryException - Registry implementations may handle exceptions and throw RegistryException if the exception has to be propagated to the client.

getAverageRating

public float getAverageRating(java.lang.String resourcePath)
                       throws RegistryException

Description copied from interface: Registry

Returns the average rating for the given resource. This is the average of all ratings done by all users for the given resource.

Specified by:

getAverageRating in interface Registry

Parameters:

resourcePath - Path of the resource.

Returns:

Average rating between 1 and 5.

Throws:

RegistryException - if an error occurs

getRating

public int getRating(java.lang.String path,
                     java.lang.String userName)
              throws RegistryException

Description copied from interface: Registry

Returns the rating given to the specified resource by the given user

Specified by:

getRating in interface Registry

Parameters:

path - Path of the resource

userName - username of the user

Returns:

rating given by the given user

Throws:

RegistryException - if there is a problem

executeQuery

public Resource executeQuery(java.lang.String path,
                             java.util.Map parameters)
                      throws RegistryException

Description copied from interface: Registry

Executes a custom query which lives at the given path in the Registry.

Specified by:

executeQuery in interface Registry

Parameters:

path - Path of the query to execute.

parameters - a Map of query parameters (name -> value)

Returns:

RowSet containing the fields specified in the query.

Throws:

RegistryException - depends on the implementation.

isResourceAvailable

public boolean isResourceAvailable(java.lang.String path)

getLogs

public LogEntry[] getLogs(java.lang.String resourcePath,
                          int action,
                          java.lang.String userName,
                          java.util.Date from,
                          java.util.Date to,
                          boolean recentFirst)
                   throws RegistryException

Description copied from interface: Registry

Returns the logs of the activities occured in the registy.

Specified by:

getLogs in interface Registry

Parameters:

resourcePath - If given, only the logs related to the resource path will be returned. If null, logs for all resources will be returned.

action - Only the logs pertaining to this action will be returned.

userName - If given, only the logs for activities done by the given user will be returned. If null, logs for all users will be returned.

from - If given, logs for activities occured after the given date will be returned. If null, there will not be a bound for the starting date.

to - If given, logs for activities occured before the given date will be returned. If null, there will not be a bound for the ending date.

recentFirst - If true, returned activities will be most-recent first. If false, returned activities will be oldest first.

Returns:

Array of LogEntry objects representing the logs

Throws:

RegistryException - if there is a problem