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The PythonActor was used extensively in this project. It is based on the Jython interpreter which provides standard Python functionality within a Java application. Because Jython is implemented in Java, it also provides access to any Java class or class library available to the JVM. In this way, it provides a rapid prototyping tool that supports coding in both Java and Python.
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FCRepo Add Datastream Actor
This actor establishes a connection connects to a Fedora Repository Respoitory and sends a request using the Fedora REST APIadds a datastream to an existing object.
Required Packages :
- JyFedoREST
Source file :
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- AddDatastreamActor.py
Input
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port:
- injest_info : ObjectToken containing a Jython dictionary containing data from a form usbmitted via "FCRepo Datastream Dialog". Alternately, any Jython dictionary with the following keys:
- fcrepoURL =
- base URL of the Fedora Repository.
- method_uri : StringToken containing the URI for the REST API method to be executed.
- username = name of a Fedora Repository user
- .
- password
- = password corresponding to the username.
- pid = identifier for object to be queried.
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Output ports:
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- dsid = identifier of datastream to be queried.
- dsLabel = label for datastream to be created.
- dsLocation = URL of file containing datastream content.
- mimeType = mime type of datastream content.
- controlGroup = datastream control group, optional, defaults to 'M'.
- dsState = datastream state, optional, defaults to 'A'.
- versionable = whether datastream is versionable, optional, defaults to True.
- formatURI = URI of datastream format description, optional, no default.
- checksumType = datastream checksum type, optional, no default.
- altIDs = list of alternate IDs for datastream, optional, no default.
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Output port:
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- result : StringToken containing results of the request to add a dissemination
- out - ObjectToken - a Jython object containing the results of the method execution.
The "FCRepo REST GETAdd Datastream " PythonActor is used in the following workflows:
- REST API Test1
- REST API Test2
- REST API Test3
- REST API Test4
FormatSerializerActor
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- Ingest With Datastream
FCRepo Datastream Dialog Actor
This actor displays a SWING dialog that allows the user to enter parameters required to connect to a Fedora Repository and access a particular datastream.
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Required Packages :
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- FCRepoKepler
Source file :
FormatSerializerActorFCRepoDatastreamDialogActor.py
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Input port :
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- None
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Output port:
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- in out : ObjectToken containing the results of the method executed by a "FCRepo REST GET" actor.
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Output ports:
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- image_out : AWTImageToken containg an AWT Image. It is broadcast only if the an image was supplied to the "in" port.
- string_out : StringToken. It is broadcast only if a string was supplied to the "in" port.
- a Jython dictionary with name/value pairs for all input fields in the form. This object contains the following keys:
- passalong = name of button pressed.
- fcrepoURL = base URL of the Fedora Repository.
- username = name of a Fedora Repository user.
- password = password corresponding to the username.
- pid = identifier for object to be accessed.
- dsid = identifier of datastream to be accessed.
The "FCRepo Datastream DialogThe "Format Serialzer" PythonActor is used in the following workflows:
- REST API Test1
- REST API Test2
- REST API Test3
- REST API Test4
- REST API Test5
FCRepoDialogActorFCRepo Dialog Actor
This actor displays a SWING dialog that allows the user to enter parameters required to connect to a Fedora Repository.
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Required Packages :
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- FCRepoKepler
Source file :
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Input ports :
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- None
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Output port :
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- out : ObjectToken containing a Jython dictionary with name/value pairs for all input fields in the form. This object contains the following keys:
- passalong = name of button pressed.
- fcrepoURL = base URL of the Fedora Repository.
- username = name of a Fedora Repository user.
- password = password corresponding to the username.
The "FCRepo Dialog" PythonActor is used in the following workflows:
- REST API Test3
- REST API Test4
FCRepo Dissemination Actor
This actor connects to a Fedora Respoitory and retrieves a datastream dissemination.
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Required Packages :
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- JyFedoREST
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Source file :
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Input port:
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- dialog_info : ObjectToken containing a Jython dictionary containing data from a form usbmitted via "FCRepo Datastream Dialog". Alternately, any Jython dictionary with the following keys:
- fcrepoURL = base URL of the Fedora Repository.
- username = name of a Fedora Repository user.
- password = password corresponding to the username.
- pid = identifier for object to be queried.
- dsid = identifier of datastream to be queried.
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Output port:
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- out : ObjectToken containing a Jython object with the data returned by the request for a dissemination.
The ""FCRepo Dissemination" PythonActor is used in the following workflows:
- REST API Test5
FCRepo GET Actor
This actor establishes a connection to a Fedora Repository and sends a request using the Fedora REST API.
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Required Packages :
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- JyFedoREST
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Source file :
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Input ports :
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- repository : StringToken containing the base URL of the Fedora Repository.
- method_uri : StringToken containing the URI for the REST API method to be executed.
- username : StringToken containing the name of a Fedora Repository user with sufficient access authority to execute the method.
- password : StringToken containing the password corresponding to the username.
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Output ports:
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- out - ObjectToken - a Jython object containing the results of the method execution.
The "FCRepo REST GETFC Repository Dialog" PythonActor is used in the following workflows:
- REST API Test1
- REST API Test2
- REST API Test3
- REST API Test4
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FCRepo Ingest Dialog Actor
This actor displays a SWING dialog that allows the user to enter parameters required to connect to a Fedora Repository and access a particular create a new object with a single datastream.
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Required Packages :
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- FCRepoKepler
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Source file :
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FCRepoDatastreamDialogActorIngestDialogActor.py
Input
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ports :
- None
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Output port :
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- out : ObjectToken containing a Jython dictionary with name/value pairs for all input fields in the form. This object contains the following keys:
- passalong = name of button pressed.
- fcrepoURL = base URL of the Fedora Repository.
- username = name of a Fedora Repository user.
- password = password corresponding to the username.
- pid = identifier of object to create.
- objLabel = label for object to be accessedcreate.
- dsid = identifier of datastream to be accessedqueried.
- dsLabel = label for datastream to be created.
- dsLocation = URL of file containing datastream content.
- mimeType = mime type of datastream content.
The "FCRepo Datastream Ingest Dialog" PythonActor is used in the following workflows:
- REST API Test5
- Ingest With Datastream
FCRepo Object Create Actor
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This actor connects to a Fedora Respoitory and retrieves creates a datastream disseminationnew object.
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Required Packages :
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- JyFedoREST
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Source file :
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- DatastreamDisseminationActorObjectCreateActor.py
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Input port:
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- dialoginjest_info : ObjectToken containing a Jython dictionary containing data from a form usbmitted via "FCRepo Datastream Ingest Dialog". Alternately, any Jython dictionary with the following keys:
- fcrepoURL = base URL of the Fedora Repository.
- username = name of a Fedora Repository user.
- password = password corresponding to the username.
- pid = identifier for object to be queried.
- objLabel = label for object to be created.
- dsid = identifier of datastream to be queried.
- dsLabel = label for datastream to be created.
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Output port:
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- dsLocation = URL of file containing datastream content.
- mimeType = mime type of datastream content.
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Output ports:
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- result : StringToken containing results of the request to add a dissemination.
- datastream
- out : ObjectToken containing a Jython object with the data returned by the request for a dissemnation.dictionary with name/value pairs from input form. This object contains the following keys:
- passalong = name of button pressed.
- fcrepoURL = base URL of the Fedora Repository.
- username = name of a Fedora Repository user.
- password = password corresponding to the username.
- pid = identifier of object to create.
- dsid = identifier of datastream to be queried.
- dsLabel = label for datastream to be created.
- dsLocation = URL of file containing datastream content.
- mimeType = mime type of datastream content.
The "FCRepo Add Datastream " PythonActor is used in the following workflows:
- Ingest With Datastream
Format Serializer Actor
This actor is a helper that determines the type of object returned by a GET request and reformats the output so that other Kepler actors can handle it.
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Source file :
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Input port:
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- in : ObjectToken containing the results of the method executed by a "FCRepo REST GET" actor.
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Output ports:
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- image_out : AWTImageToken containg an AWT Image. It is broadcast only if the an image was supplied to the "in" port.
- string_out : StringToken. It is broadcast only if a string was supplied to the "in" port.
The "Format SerialzerThe "FCRepo Dissemination" PythonActor is used in the following workflows:
- REST API Test1
- REST API Test2
- REST API Test3
- REST API Test4
- REST API Test5
Kepler Workflows
REST API Test1
A simple workflow to retrieve an XML string from a Fedora Repository containing the 'Smiley' demo data set.
Screenshot :
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Source file :
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REST API Test2
A simple workflow to retrieve an image from a Fedora Repository containing the 'Smiley' demo data set.
Screenshot :
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Source file :
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REST API Test3
A workflow to retrieve a list of all objects in a Fedora Repository.
Screenshot :
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Source file :
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REST API Test4
A variation of REST-API-Test4.xml to be customized to retrieve a datastream dissemination from a local repository.
Screenshot :
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Source file :
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REST API Test5
A workflow thast that uses the fcrepo.http.restapi client code to retrieve a datastream dissemenation.
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- Display a form dialog for entering parameters to be used to retrieve a datastream dissemination. Uses SimpleHTMLDialog
from fcrepo.kepler to display and manage the form. - Use fcrepo.http.restapi to get a datastream dissemnination.
- Serialize the dissemination into a displayable format.
- Display results.
Screenshot :
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Source file :
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Ingest With Datastream
A workflow that uses the fcrepo.http.restapi client code to create a new object with a single datastream.
This is a three step workflow:
- Display a form dialog for entering parameters that can be used to create a new object with a single datastream. Uses SimpleHTMLDialog from fcrepo.kepler to display and manage the form.
- Use fcrepo.http.restapi to create the new object. Display results.
- Use fcrepo.http.restapi to add a datastream. Display results.
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Screenshot :
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IngestWithDatastream.jpg
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Source file :
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IngestWithDatastream.xml
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