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Chapter 7. Knowledge Store REST API for Business Central spaces and projects

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Red Hat Decision Manager provides a Knowledge Store REST API that you can use to interact with your projects and spaces in Red Hat Decision Manager without using the Business Central user interface. The Knowledge Store is the artifact repository for assets in Red Hat Decision Manager. This API support enables you to facilitate and automate maintenance of Business Central projects and spaces.

With the Knowledge Store REST API, you can perform the following actions:

  • Retrieve information about all projects and spaces
  • Create, update, or delete projects and spaces
  • Build, deploy, and test projects
  • Retrieve information about previous Knowledge Store REST API requests, or jobs

Knowledge Store REST API requests require the following components:

Authentication

The Knowledge Store REST API requires HTTP Basic authentication or token-based authentication for the user role rest-all. To view configured user roles for your Red Hat Decision Manager distribution, navigate to ~/$SERVER_HOME/standalone/configuration/application-roles.properties and ~/application-users.properties.

To add a user with the rest-all role, navigate to ~/$SERVER_HOME/bin and run the following command: 

$ ./add-user.sh -a --user <USERNAME> --password <PASSWORD> --role rest-all

For more information about user roles and Red Hat Decision Manager installation options, see Planning a Red Hat Decision Manager installation.

HTTP headers

The Knowledge Store REST API requires the following HTTP headers for API requests:

  • Accept: Data format accepted by your requesting client:

    • application/json (JSON)

  • Content-Type: Data format of your POST or PUT API request data:

    • application/json (JSON)
HTTP methods

The Knowledge Store REST API supports the following HTTP methods for API requests:

  • GET: Retrieves specified information from a specified resource endpoint
  • POST: Creates or updates a resource
  • DELETE: Deletes a resource
Base URL

The base URL for Knowledge Store REST API requests is http://SERVER:PORT/decision-central/rest/, such as http://localhost:8080/decision-central/rest/.

Note

The REST API base URL for the Knowledge Store and for the Decision Manager controller built in to Business Central are the same because both are considered part of Business Central REST services.

Endpoints

Knowledge Store REST API endpoints, such as /spaces/{spaceName} for a specified space, are the URIs that you append to the Knowledge Store REST API base URL to access the corresponding resource or type of resource in Red Hat Decision Manager.

Example request URL for /spaces/{spaceName} endpoint

http://localhost:8080/decision-central/rest/spaces/MySpace

Request data

HTTP POST requests in the Knowledge Store REST API may require a JSON request body with data to accompany the request.

Example POST request URL and JSON request body data

http://localhost:8080/decision-central/rest/spaces/MySpace/projects 

{
  "name": "Employee_Rostering",
  "groupId": "employeerostering",
  "version": "1.0.0-SNAPSHOT",
  "description": "Employee rostering problem optimisation using Planner. Assigns employees to shifts based on their skill."
}

7.1. Sending requests with the Knowledge Store REST API using a REST client or curl utility

The Knowledge Store REST API enables you to interact with your projects and spaces in Red Hat Decision Manager without using the Business Central user interface. You can send Knowledge Store REST API requests using any REST client or curl utility.

Prerequisites

  • Business Central is installed and running.
  • You have rest-all user role access to Business Central.

Procedure

  1. Identify the relevant API endpoint to which you want to send a request, such as [GET] /spaces to retrieve spaces in Business Central.

  2. In a REST client or curl utility, enter the following components for a GET request to /spaces. Adjust any request details according to your use case.

    For REST client:

    • Authentication: Enter the user name and password of the Business Central user with the rest-all role.

    • HTTP Headers: Set the following header:

      • Accept: application/json
    • HTTP method: Set to GET.
    • URL: Enter the Knowledge Store REST API base URL and endpoint, such as http://localhost:8080/decision-central/rest/spaces.

    For curl utility:

    • -u: Enter the user name and password of the Business Central user with the rest-all role.

    • -H: Set the following header:

      • accept: application/json
    • -X: Set to GET.
    • URL: Enter the Knowledge Store REST API base URL and endpoint, such as http://localhost:8080/decision-central/rest/spaces. 
    curl -u 'baAdmin:password@1' -H "accept: application/json" -X GET "http://localhost:8080/decision-central/rest/spaces"

  3. Execute the request and review the Decision Server response.

    Example server response (JSON): 

    [
  {
    "name": "MySpace",
    "description": null,
    "projects": [
      {
        "name": "Employee_Rostering",
        "spaceName": "MySpace",
        "groupId": "employeerostering",
        "version": "1.0.0-SNAPSHOT",
        "description": "Employee rostering problem optimisation using Planner. Assigns employees to shifts based on their skill.",
        "publicURIs": [
          {
            "protocol": "git",
            "uri": "git://localhost:9418/MySpace/example-Employee_Rostering"
          },
          {
            "protocol": "ssh",
            "uri": "ssh://localhost:8001/MySpace/example-Employee_Rostering"
          }
        ]
      },
      {
        "name": "Mortgage_Process",
        "spaceName": "MySpace",
        "groupId": "mortgage-process",
        "version": "1.0.0-SNAPSHOT",
        "description": "Getting started loan approval process in BPMN2, decision table, business rules, and forms.",
        "publicURIs": [
          {
            "protocol": "git",
            "uri": "git://localhost:9418/MySpace/example-Mortgage_Process"
          },
          {
            "protocol": "ssh",
            "uri": "ssh://localhost:8001/MySpace/example-Mortgage_Process"
          }
        ]
      }
    ],
    "owner": "admin",
    "defaultGroupId": "com.myspace"
  },
  {
    "name": "MySpace2",
    "description": null,
    "projects": [
      {
        "name": "IT_Orders",
        "spaceName": "MySpace",
        "groupId": "itorders",
        "version": "1.0.0-SNAPSHOT",
        "description": "Case Management IT Orders project",
        "publicURIs": [
          {
            "protocol": "git",
            "uri": "git://localhost:9418/MySpace/example-IT_Orders-1"
          },
          {
            "protocol": "ssh",
            "uri": "ssh://localhost:8001/MySpace/example-IT_Orders-1"
          }
        ]
      }
    ],
    "owner": "admin",
    "defaultGroupId": "com.myspace"
  }
]

  4. In your REST client or curl utility, send another API request with the following components for a POST request to /spaces/{spaceName}/projects to create a project within a space. Adjust any request details according to your use case.

    For REST client:

    • Authentication: Enter the user name and password of the Business Central user with the rest-all role.

    • HTTP Headers: Set the following header:

      • Accept: application/json
      • Accept-Language: en-US
      • Content-Type: application/json
    • HTTP method: Set to POST.
    • URL: Enter the Knowledge Store REST API base URL and endpoint, such as http://localhost:8080/decision-central/rest/spaces/MySpace/projects.
    • Request body: Add a JSON request body with the identification data for the new project: 
    {
  "name": "Employee_Rostering",
  "groupId": "employeerostering",
  "version": "1.0.0-SNAPSHOT",
  "description": "Employee rostering problem optimisation using Planner. Assigns employees to shifts based on their skill."
}

    For curl utility:

    • -u: Enter the user name and password of the Business Central user with the rest-all role.

    • -H: Set the following headers:

      • Accept: application/json
      • Accept-Language: en-US (If not defined, the default locale from the JVM is reflected)
      • Content-Type: application/json
    • -X: Set to POST.
    • URL: Enter the Knowledge Store REST API base URL and endpoint, such as http://localhost:8080/decision-central/rest/spaces/MySpace/projects.
    • -d: Add a JSON request body or file (@file.json) with the identification data for the new project: 
    curl -u 'baAdmin:password@1' -H "Accept: application/json" -H "Accept-Language: en-US" -H "Content-Type: application/json" -X POST "http://localhost:8080/decision-central/rest/spaces/MySpace/projects" -d "{ \"name\": \"Employee_Rostering\", \"groupId\": \"employeerostering\", \"version\": \"1.0.0-SNAPSHOT\", \"description\": \"Employee rostering problem optimisation using Planner. Assigns employees to shifts based on their skill.\"}"
    curl -u 'baAdmin:password@1' -H "Accept: application/json" -H "Accept-Language: en-US" -H "Content-Type: application/json" -X POST "http://localhost:8080/decision-central/rest/spaces/MySpace/projects" -d @my-project.json

  5. Execute the request and review the Decision Server response.

    Example server response (JSON): 

    {
  "jobId": "1541017411591-6",
  "status": "APPROVED",
  "spaceName": "MySpace",
  "projectName": "Employee_Rostering",
  "projectGroupId": "employeerostering",
  "projectVersion": "1.0.0-SNAPSHOT",
  "description": "Employee rostering problem optimisation using Planner. Assigns employees to shifts based on their skill."
}

    If you encounter request errors, review the returned error code messages and adjust your request accordingly.

7.2. Supported Knowledge Store REST API endpoints

The Knowledge Store REST API provides endpoints for managing spaces and projects in Red Hat Decision Manager and for retrieving information about previous Knowledge Store REST API requests, or jobs.

7.2.1. Spaces

The Knowledge Store REST API supports the following endpoints for managing spaces in Business Central. The Knowledge Store REST API base URL is http://SERVER:PORT/decision-central/rest/. All requests require HTTP Basic authentication or token-based authentication for the rest-all user role.

[GET] /spaces

Returns all spaces in Business Central.

Example server response (JSON)

[
  {
    "name": "MySpace",
    "description": null,
    "projects": [
      {
        "name": "Employee_Rostering",
        "spaceName": "MySpace",
        "groupId": "employeerostering",
        "version": "1.0.0-SNAPSHOT",
        "description": "Employee rostering problem optimisation using Planner. Assigns employees to shifts based on their skill.",
        "publicURIs": [
          {
            "protocol": "git",
            "uri": "git://localhost:9418/MySpace/example-Employee_Rostering"
          },
          {
            "protocol": "ssh",
            "uri": "ssh://localhost:8001/MySpace/example-Employee_Rostering"
          }
        ]
      },
      {
        "name": "Mortgage_Process",
        "spaceName": "MySpace",
        "groupId": "mortgage-process",
        "version": "1.0.0-SNAPSHOT",
        "description": "Getting started loan approval process in BPMN2, decision table, business rules, and forms.",
        "publicURIs": [
          {
            "protocol": "git",
            "uri": "git://localhost:9418/MySpace/example-Mortgage_Process"
          },
          {
            "protocol": "ssh",
            "uri": "ssh://localhost:8001/MySpace/example-Mortgage_Process"
          }
        ]
      }
    ],
    "owner": "admin",
    "defaultGroupId": "com.myspace"
  },
  {
    "name": "MySpace2",
    "description": null,
    "projects": [
      {
        "name": "IT_Orders",
        "spaceName": "MySpace",
        "groupId": "itorders",
        "version": "1.0.0-SNAPSHOT",
        "description": "Case Management IT Orders project",
        "publicURIs": [
          {
            "protocol": "git",
            "uri": "git://localhost:9418/MySpace/example-IT_Orders-1"
          },
          {
            "protocol": "ssh",
            "uri": "ssh://localhost:8001/MySpace/example-IT_Orders-1"
          }
        ]
      }
    ],
    "owner": "admin",
    "defaultGroupId": "com.myspace"
  }
]

[GET] /spaces/{spaceName}

Returns information about a specified space.

Table 7.1. Request parameters
NameDescriptionTypeRequirement

spaceName

Name of the space to be retrieved

String

Required

Example server response (JSON)

{
  "name": "MySpace",
  "description": null,
  "projects": [
    {
      "name": "Mortgage_Process",
      "spaceName": "MySpace",
      "groupId": "mortgage-process",
      "version": "1.0.0-SNAPSHOT",
      "description": "Getting started loan approval process in BPMN2, decision table, business rules, and forms.",
      "publicURIs": [
        {
          "protocol": "git",
          "uri": "git://localhost:9418/MySpace/example-Mortgage_Process"
        },
        {
          "protocol": "ssh",
          "uri": "ssh://localhost:8001/MySpace/example-Mortgage_Process"
        }
      ]
    },
    {
      "name": "Employee_Rostering",
      "spaceName": "MySpace",
      "groupId": "employeerostering",
      "version": "1.0.0-SNAPSHOT",
      "description": "Employee rostering problem optimisation using Planner. Assigns employees to shifts based on their skill.",
      "publicURIs": [
        {
          "protocol": "git",
          "uri": "git://localhost:9418/MySpace/example-Employee_Rostering"
        },
        {
          "protocol": "ssh",
          "uri": "ssh://localhost:8001/MySpace/example-Employee_Rostering"
        }
      ]
    },
    {
      "name": "Evaluation_Process",
      "spaceName": "MySpace",
      "groupId": "evaluation",
      "version": "1.0.0-SNAPSHOT",
      "description": "Getting started Business Process for evaluating employees",
      "publicURIs": [
        {
          "protocol": "git",
          "uri": "git://localhost:9418/MySpace/example-Evaluation_Process"
        },
        {
          "protocol": "ssh",
          "uri": "ssh://localhost:8001/MySpace/example-Evaluation_Process"
        }
      ]
    },
    {
      "name": "IT_Orders",
      "spaceName": "MySpace",
      "groupId": "itorders",
      "version": "1.0.0-SNAPSHOT",
      "description": "Case Management IT Orders project",
      "publicURIs": [
        {
          "protocol": "git",
          "uri": "git://localhost:9418/MySpace/example-IT_Orders"
        },
        {
          "protocol": "ssh",
          "uri": "ssh://localhost:8001/MySpace/example-IT_Orders"
        }
      ]
    }
  ],
  "owner": "admin",
  "defaultGroupId": "com.myspace"
}

[POST] /spaces

Creates a space in Business Central.

Table 7.2. Request parameters
NameDescriptionTypeRequirement

body

The name, description, owner, defaultGroupId, and any other components of the new space

Request body

Required

Example request body (JSON)

{
  "name": "NewSpace",
  "description": "My new space.",
  "owner": "admin",
  "defaultGroupId": "com.newspace"
}

Example server response (JSON)

{
  "jobId": "1541016978154-3",
  "status": "APPROVED",
  "spaceName": "NewSpace",
  "owner": "admin",
  "defaultGroupId": "com.newspace",
  "description": "My new space."
}

[DELETE] /spaces/{spaceName}

Deletes a specified space from Business Central.

Table 7.3. Request parameters
NameDescriptionTypeRequirement

spaceName

Name of the space to be deleted

String

Required

Example server response (JSON)

{
  "jobId": "1541127032997-8",
  "status": "APPROVED",
  "spaceName": "MySpace",
  "owner": "admin",
  "description": "My deleted space.",
  "repositories": null
}

7.2.2. Projects

The Knowledge Store REST API supports the following endpoints for managing, building, and deploying projects in Business Central. The Knowledge Store REST API base URL is http://SERVER:PORT/decision-central/rest/. All requests require HTTP Basic authentication or token-based authentication for the rest-all user role.

[GET] /spaces/{spaceName}/projects

Returns projects in a specified space.

Table 7.4. Request parameters
NameDescriptionTypeRequirement

spaceName

Name of the space for which you are retrieving projects

String

Required

Example server response (JSON)

[
  {
    "name": "Mortgage_Process",
    "spaceName": "MySpace",
    "groupId": "mortgage-process",
    "version": "1.0.0-SNAPSHOT",
    "description": "Getting started loan approval process in BPMN2, decision table, business rules, and forms.",
    "publicURIs": [
      {
        "protocol": "git",
        "uri": "git://localhost:9418/MySpace/example-Mortgage_Process"
      },
      {
        "protocol": "ssh",
        "uri": "ssh://localhost:8001/MySpace/example-Mortgage_Process"
      }
    ]
  },
  {
    "name": "Employee_Rostering",
    "spaceName": "MySpace",
    "groupId": "employeerostering",
    "version": "1.0.0-SNAPSHOT",
    "description": "Employee rostering problem optimisation using Planner. Assigns employees to shifts based on their skill.",
    "publicURIs": [
      {
        "protocol": "git",
        "uri": "git://localhost:9418/MySpace/example-Employee_Rostering"
      },
      {
        "protocol": "ssh",
        "uri": "ssh://localhost:8001/MySpace/example-Employee_Rostering"
      }
    ]
  },
  {
    "name": "Evaluation_Process",
    "spaceName": "MySpace",
    "groupId": "evaluation",
    "version": "1.0.0-SNAPSHOT",
    "description": "Getting started Business Process for evaluating employees",
    "publicURIs": [
      {
        "protocol": "git",
        "uri": "git://localhost:9418/MySpace/example-Evaluation_Process"
      },
      {
        "protocol": "ssh",
        "uri": "ssh://localhost:8001/MySpace/example-Evaluation_Process"
      }
    ]
  },
  {
    "name": "IT_Orders",
    "spaceName": "MySpace",
    "groupId": "itorders",
    "version": "1.0.0-SNAPSHOT",
    "description": "Case Management IT Orders project",
    "publicURIs": [
      {
        "protocol": "git",
        "uri": "git://localhost:9418/MySpace/example-IT_Orders"
      },
      {
        "protocol": "ssh",
        "uri": "ssh://localhost:8001/MySpace/example-IT_Orders"
      }
    ]
  }
]

[GET] /spaces/{spaceName}/projects/{projectName}

Returns information about a specified project in a specified space.

Table 7.5. Request parameters
NameDescriptionTypeRequirement

spaceName

Name of the space where the project is located

String

Required

projectName

Name of the project to be retrieved

String

Required

Example server response (JSON)

{
  "name": "Employee_Rostering",
  "spaceName": "MySpace",
  "groupId": "employeerostering",
  "version": "1.0.0-SNAPSHOT",
  "description": "Employee rostering problem optimisation using Planner. Assigns employees to shifts based on their skill.",
  "publicURIs": [
    {
      "protocol": "git",
      "uri": "git://localhost:9418/MySpace/example-Employee_Rostering"
    },
    {
      "protocol": "ssh",
      "uri": "ssh://localhost:8001/MySpace/example-Employee_Rostering"
    }
  ]
}

[POST] /spaces/{spaceName}/projects

Creates a project in a specified space.

Table 7.6. Request parameters
NameDescriptionTypeRequirement

spaceName

Name of the space in which the new project will be created

String

Required

body

The name, groupId, version, description, and any other components of the new project

Request body

Required

Example request body (JSON)

{
  "name": "Employee_Rostering",
  "groupId": "employeerostering",
  "version": "1.0.0-SNAPSHOT",
  "description": "Employee rostering problem optimisation using Planner. Assigns employees to shifts based on their skill."
}

Example server response (JSON)

{
  "jobId": "1541017411591-6",
  "status": "APPROVED",
  "spaceName": "MySpace",
  "projectName": "Employee_Rostering",
  "projectGroupId": "employeerostering",
  "projectVersion": "1.0.0-SNAPSHOT",
  "description": "Employee rostering problem optimisation using Planner. Assigns employees to shifts based on their skill."
}

[DELETE] /spaces/{spaceName}/projects/{projectName}

Deletes a specified project from a specified space.

Table 7.7. Request parameters
NameDescriptionTypeRequirement

spaceName

Name of the space where the project is located

String

Required

projectName

Name of the project to be deleted

String

Required

Example server response (JSON)

{
  "jobId": "1541128617727-10",
  "status": "APPROVED",
  "projectName": "Employee_Rostering",
  "spaceName": "MySpace"
}

[POST] /spaces/{spaceName}/git/clone

Clones a project into a specified space from a specified Git address.

Table 7.8. Request parameters
NameDescriptionTypeRequirement

spaceName

Name of the space to which you are cloning a project

String

Required

body

The name, description, and Git repository userName, password, and gitURL for the project to be cloned

Request body

Required

Example request body (JSON)

{
  "name": "Employee_Rostering",
  "description": "Employee rostering problem optimisation using Planner. Assigns employees to shifts based on their skill.",
  "userName": "baAdmin",
  "password": "password@1",
  "gitURL": "git://localhost:9418/MySpace/example-Employee_Rostering"
}

Example server response (JSON)

{
  "jobId": "1541129488547-13",
  "status": "APPROVED",
  "cloneProjectRequest": {
    "name": "Employee_Rostering",
    "description": "Employee rostering problem optimisation using Planner. Assigns employees to shifts based on their skill.",
    "userName": "baAdmin",
    "password": "password@1",
    "gitURL": "git://localhost:9418/MySpace/example-Employee_Rostering"
  },
  "spaceName": "MySpace2"
}

[POST] /spaces/{spaceName}/projects/{projectName}/maven/compile

Compiles a specified project in a specified space (equivalent to mvn compile).

Table 7.9. Request parameters
NameDescriptionTypeRequirement

spaceName

Name of the space where the project is located

String

Required

projectName

Name of the project to be compiled

String

Required

Example server response (JSON)

{
  "jobId": "1541128617727-10",
  "status": "APPROVED",
  "projectName": "Employee_Rostering",
  "spaceName": "MySpace"
}

[POST] /spaces/{spaceName}/projects/{projectName}/maven/test

Tests a specified project in a specified space (equivalent to mvn test).

Table 7.10. Request parameters
NameDescriptionTypeRequirement

spaceName

Name of the space where the project is located

String

Required

projectName

Name of the project to be tested

String

Required

Example server response (JSON)

{
  "jobId": "1541132591595-19",
  "status": "APPROVED",
  "projectName": "Employee_Rostering",
  "spaceName": "MySpace"
}

[POST] /spaces/{spaceName}/projects/{projectName}/maven/install

Installs a specified project in a specified space (equivalent to mvn install).

Table 7.11. Request parameters
NameDescriptionTypeRequirement

spaceName

Name of the space where the project is located

String

Required

projectName

Name of the project to be installed

String

Required

Example server response (JSON)

{
  "jobId": "1541132668987-20",
  "status": "APPROVED",
  "projectName": "Employee_Rostering",
  "spaceName": "MySpace"
}

[POST] /spaces/{spaceName}/projects/{projectName}/maven/deploy

Deploys a specified project in a specified space (equivalent to mvn deploy).

Table 7.12. Request parameters
NameDescriptionTypeRequirement

spaceName

Name of the space where the project is located

String

Required

projectName

Name of the project to be deployed

String

Required

Example server response (JSON)

{
  "jobId": "1541132816435-21",
  "status": "APPROVED",
  "projectName": "Employee_Rostering",
  "spaceName": "MySpace"
}

7.2.3. Jobs (API requests)

All POST and DELETE requests in the Knowledge Store REST API return a job ID associated with each request, in addition to the returned request details. You can use a job ID to view the request status or delete a sent request.

Knowledge Store REST API requests, or jobs, can have the following statuses:

Table 7.13. Job statuses (API request statuses)
StatusDescription

ACCEPTED

The request was accepted and is being processed.

BAD_REQUEST

The request contained incorrect content and was not accepted.

RESOURCE_NOT_EXIST

The requested resource (path) does not exist.

DUPLICATE_RESOURCE

The resource already exists.

SERVER_ERROR

An error occurred in Decision Server.

SUCCESS

The request finished successfully.

FAIL

The request failed.

APPROVED

The request was approved.

DENIED

The request was denied.

GONE

The job ID for the request could not be found due to one of the following reasons:

  • The request was explicitly removed.
  • The request finished and has been deleted from a status cache. A request is removed from a status cache after the cache has reached its maximum capacity.
  • The request never existed.

The Knowledge Store REST API supports the following endpoints for retrieving or deleting sent API requests. The Knowledge Store REST API base URL is http://SERVER:PORT/decision-central/rest/. All requests require HTTP Basic authentication or token-based authentication for the rest-all user role.

[GET] /jobs/{jobId}

Returns the status of a specified job (a previously sent API request).

Table 7.14. Request parameters
NameDescriptionTypeRequirement

jobId

ID of the job to be retrieved (example: 1541010216919-1)

String

Required

Example server response (JSON)

{
  "status": "SUCCESS",
  "jobId": "1541010216919-1",
  "result": null,
  "lastModified": 1541010218352,
  "detailedResult": [
    "level:INFO, path:null, text:Build of module 'Mortgage_Process' (requested by system) completed.\n Build: SUCCESSFUL"
  ]
}

[DELETE] /jobs/{jobId}

Deletes a specified job (a previously sent API request). If the job is not being processed yet, this request removes the job from the job queue. This request does not cancel or stop an ongoing job.

Table 7.15. Request parameters
NameDescriptionTypeRequirement

jobId

ID of the job to be deleted (example: 1541010216919-1)

String

Required

Example server response (JSON)

{
  "status": "GONE",
  "jobId": "1541010216919-1",
  "result": null,
  "lastModified": 1541132054916,
  "detailedResult": [
    "level:INFO, path:null, text:Build of module 'Mortgage_Process' (requested by system) completed.\n Build: SUCCESSFUL"
  ]
}

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