Topology - script API

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Topology - script API

Function query

Query the topology at any point in time. Builder methods available for extracting components, relations and comparing topological queries.

Topology.query(query: String)

Args:

• query - a STQL query.

Returns:

AsyncScriptResult[TopologyScriptApiQueryResponse]

Builder methods:

• at(time: Instant or Timeslice) - specifes a time for which the query should be executed.

  • Use an instant to query for transactions that started at a specific timestamp including at any point in the past.

  • Use the currentTimeslice to query for all transactions currently started or in progress.

• repeatAt(time: Instant) - repeats the same query but at a different exact time.

• diff(queryResult: TopologyScriptApiQueryResponse) - compares this query with another query. A query should be the result of a call to this function.

• diffWithPrev(queryResult: TopologyScriptApiQueryResponse) - compares this query with the last query in the chain. A query should be the result of a call to this function. This builder method is only available after the diff builder method was called.

• components() - returns a summary of the components. After this builder method no more builder methods can be called.

• fullComponents() - returns the component with all their data. After this builder method no more builder methods can be called.

• problems() - returns problems for a given query along with the root cause and its contributing problems.

• relations() - returns a summary of the relations. After this builder method no more builder methods can be called.

• fullRelations() - returns the relations with all their data. After this builder method no more builder methods can be called.

Examples:

• Get the test environment:

  Topology.query('environments in ("test")')

• Get the test environment yesterday:

  Topology.query('environments in ("test")').at('-1d')

• Get test environment one hour ago, two hours ago and three hours ago.

  Topology.query('environments in ("test")').at('-1h').repeatAt('-2h').repeatAt('-3h')

• Get the component that differ between the test and production environment:

  Topology.query('environments in ("test")').diff(Topology.query('environments in ("production")')).components()

• Get the difference between the test environment one week ago and now:

  def q = 'environments in ("test")'
  Topology.query(q).at('-1w').diff(Topology.query(q))

• Get all the names of components from the test environment using thenCollect:

  Topology.query('environments in ("test")')
    .components()
    .thenCollect { it.name }

• Get the first root problem's first failing check - likely a major root cause of a problem in the queried topology:

    Topology
    .query('environments in ("test")')
    .problems()
    .then{ problems -> 
        problems.isEmpty()? null : problems[0].failingCheckNames[0] 
    }