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GraphQL query support | Selenium

GraphQL query support

GraphQL is a query language for APIs and a runtime for fulfilling those queries with your existing data. It gives users the power to ask for exactly what they need and nothing more.

Enums

Enums represent possible sets of values for a field.

For example, the Node object has a field called status. The state is an enum (specifically, of type Status) because it may be UP , DRAINING or UNAVAILABLE.

Scalars

Scalars are primitive values: Int, Float, String, Boolean, or ID.

When calling the GraphQL API, you must specify nested subfield until you return only scalars.

Structure of the Schema

The structure of grid schema is as follows:

{
    session(id: "<session-id>") : {
        id,
        capabilities,
        startTime,
        uri,
        nodeId,
        nodeUri,
        sessionDurationMillis
        slot : {
            id,
            stereotype,
            lastStarted
        }
    }
    grid: {
        uri,
        totalSlots,
        nodeCount,
        maxSession,
        sessionCount,
        version,
        sessionQueueSize
    }
    sessionsInfo: {
        sessionQueueRequests,
        sessions: [
            {
                id,
                capabilities,
                startTime,
                uri,
                nodeId,
                nodeUri,
                sessionDurationMillis
                slot : {
                    id,
                    stereotype,
                    lastStarted
                }
            }
        ]
    }
    nodesInfo: {
        nodes : [
            {
                id,
                uri,
                status,
                maxSession,
                slotCount,
                sessions: [
                    {
                        id,
                        capabilities,
                        startTime,
                        uri,
                        nodeId,
                        nodeUri,
                        sessionDurationMillis
                        slot : {
                            id,
                            stereotype,
                            lastStarted
                        }
                    }
                ],
                sessionCount,
                stereotypes,
                version,
                osInfo: {
                    arch,
                    name,
                    version
                }
            }
        ]
    }
}

Querying GraphQL

The best way to query GraphQL is by using curl requests. The query is interpreted as JSON. Ensure double quotes are properly escaped to avoid unexpected errors. GraphQL allows you to fetch only the data that you want, nothing more nothing less.

Some of the example GraphQL queries are given below. You can build your own queries as you like.

Querying the number of maxSession and sessionCount in the grid :

curl -X POST -H "Content-Type: application/json" --data '{"query": "{ grid { maxSession, sessionCount } }"}' -s <LINK_TO_GRAPHQL_ENDPOINT>

Generally on local machine the <LINK_TO_GRAPHQL_ENDPOINT> would be http://localhost:4444/graphql

Querying all details for session, node and the Grid :

curl -X POST -H "Content-Type: application/json" --data '{"query":"{ grid { uri, maxSession, sessionCount }, nodesInfo { nodes { id, uri, status, sessions { id, capabilities, startTime, uri, nodeId, nodeUri, sessionDurationMillis, slot { id, stereotype, lastStarted } }, slotCount, sessionCount }} }"}' -s <LINK_TO_GRAPHQL_ENDPOINT>

Query for getting the current session count in the Grid :

curl -X POST -H "Content-Type: application/json" --data '{"query":"{ grid { sessionCount } }"}' -s <LINK_TO_GRAPHQL_ENDPOINT>

Query for getting the max session count in the Grid :

curl -X POST -H "Content-Type: application/json" --data '{"query":"{ grid { maxSession } }"}' -s <LINK_TO_GRAPHQL_ENDPOINT>

Query for getting all session details for all nodes in the Grid :

curl -X POST -H "Content-Type: application/json" --data '{"query":"{ sessionsInfo { sessions { id, capabilities, startTime, uri, nodeId, nodeId, sessionDurationMillis } } }"}' -s <LINK_TO_GRAPHQL_ENDPOINT>

Query to get slot information for all sessions in each Node in the Grid :

curl -X POST -H "Content-Type: application/json" --data '{"query":"{ sessionsInfo { sessions { id, slot { id, stereotype, lastStarted } } } }"}' -s <LINK_TO_GRAPHQL_ENDPOINT>

Query to get session information for a given session:

curl -X POST -H "Content-Type: application/json" --data '{"query":"{ session (id: \"<session-id>\") { id, capabilities, startTime, uri, nodeId, nodeUri, sessionDurationMillis, slot { id, stereotype, lastStarted } } } "}' -s <LINK_TO_GRAPHQL_ENDPOINT>

Querying the capabilities of each node in the grid :

curl -X POST -H "Content-Type: application/json" --data '{"query": "{ nodesInfo { nodes { stereotypes } } }"}' -s <LINK_TO_GRAPHQL_ENDPOINT>

Querying the status of each node in the grid :

curl -X POST -H "Content-Type: application/json" --data '{"query": "{ nodesInfo { nodes { status } } }"}' -s <LINK_TO_GRAPHQL_ENDPOINT>

Querying the URI of each node and the grid :

curl -X POST -H "Content-Type: application/json" --data '{"query": "{ nodesInfo { nodes { uri } } }"}' -s <LINK_TO_GRAPHQL_ENDPOINT>

Query for getting the current requests in the New Session Queue:

curl -X POST -H "Content-Type: application/json" --data '{"query":"{ sessionsInfo { sessionQueueRequests } }"}' -s <LINK_TO_GRAPHQL_ENDPOINT>

Query for getting the New Session Queue size :

curl -X POST -H "Content-Type: application/json" --data '{"query":"{ grid { sessionQueueSize } }"}' -s <LINK_TO_GRAPHQL_ENDPOINT>

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