Resource Registry Service - Query Templates Management

These sections provide information regarding how to interact with Resource Registry Service for query templates management. This page presents REST and JAVA API for each functionality.

Please note that the provided examples can intentionally hide some details to avoid unneeded complexity.

Query Templates Management

Query Templates Management is responsible for the management of query templates. It offers the following APIs:

• List: it allows to list query templates;
• Create: it allows to create a new query template;
• Exists: it allows to check if an query template exists;
• Read: it allows to read a query template;
• Update: it allows to update a query template;
• Delete: it allows to delete a query template.

The Query Templates Management implements the following policies:

• it manages the Header automatically;
• it allows identifying an instance via the Universally Unique Identifier (UUID) specified in the Header;
• it validates the query templates by applying the provided default values and running the generated query.

Query Template Collection

The following table shows the exposed APIs as REST Collection.

Operation	HTTP Method	URL
List	GET	/query-templates
Create	PUT	/query-templates/{QUERY_TEMPLATE_NAME}
Exists	HEAD	/query-templates/{QUERY_TEMPLATE_NAME}
Read	GET	/query-templates/{QUERY_TEMPLATE_NAME}
Update	PUT	/query-templates/{QUERY_TEMPLATE_NAME}
Run	POST	/query-templates/{QUERY_TEMPLATE_NAME}
Delete	DELETE	/query-templates/{QUERY_TEMPLATE_NAME}

Resource Registry Query Template Client

NOT YET AVAILABLE - UNDER IMPLEMENTATION

Resource Registry Query Template Client is a java library providing RPC facilities to interact with Query Templates Management.

To use the Java library to interact with Query Template collection declare the following dependency in your pom.xml file.

<dependency>
	<groupId>org.gcube.information-system</groupId>
	<artifactId>resource-registry-query-templates-client</artifactId>
	<version>[1.0.0,2.0.0-SNAPSHOT)</version>
<dependency>

To use the client you just need to instantiate the client via the provided factory.

import org.gcube.informationsystem.resourceregistry.queries.templates.ResourceRegistry...Client;
import org.gcube.informationsystem.resourceregistry.queries.templates.ResourceRegistry...Factory;
 
...
 
ResourceRegistry...Client resourceRegistry...Client = ResourceRegistry...Factory.create();

The provided client exposes the available methods and options as explained below.

The source code of the resource-registry-query-templates-client is available at https://code-repo.d4science.org/gCubeSystem/resource-registry-query-templates-client

APIs

List Query Templates

List via Java Client

Signature

...

List via Java Client Example

The following snippet of code shows how to list all the query templates.

...

List via REST API

List via REST API Example

The following request shows how to retrieve all the resource instances.

Request URL

GET /query-templates

Create Query Template

Create via Java Client

Signature

...

Create via Java Client Example

...

Create via REST API

PUT  /query-templates/{QUERY_TEMPLATE_NAME}

Create via REST API Resource Example

The following listing shows an example of EService representation to be created.

Request URL

PUT /query-templates/GetAllEServiceWithState

Request Body

{
	"name" : "GetAllEServiceWithState",
	"description": "The following query return all the EService having the state provided as 
			parameters, e.g. down, ready. The content of the request to run this query 
			template will be something like {"$state": "ready"}",
	"template": {
		"@class": "EService",
		"consistsOf": [{
			"@class": "ConsistsOf",
			"target": {
				"@class": "StateFacet",
				"value": "$state"
			}
		}]
	},
	"templateVariables" = {
		"$state" : {
			"name": "$state",
			"description": "The state of the EService, e.g. down, ready.",
			"defaultValue": "ready"
 
		}
	}
 
}

The following listing contains the response of the service :

Response Body

...

Read Query Template

Read via Java Client

...

Read via Java Client Example

...

Read via REST API

GET /query-templates/{QUERY_TEMPLATE_NAME}

Read via REST Example

In the example, ...

Request URL

GET /query-templates/{.....}

Response Body

...

Update Instance

Update via Java Client

Signature

...

Update via Java Client Example

...

Update via REST API

PUT /query-templates/{QUERY_TEMPLATE_NAME}

Update via REST API Example

Request URL

PUT /query-templates/{...}

Request Body

...

Response Body

...

Run Query Template

Run via Java Client

...

Run via Java Client Example

...

Run via REST API

DELETE /query-templates/{...}

Run via REST Example

Request URL

DELETE /query-templates/{...}

Delete Query Template

Delete via Java Client

...

Delete via Java Client Example

...

Delete via REST API

DELETE /query-templates/{...}

Delete via REST Example

Request URL

DELETE /query-templates/{...}