com.datastax.oss.driver.api.testinfra.simulacron

Class QueryCounter

java.lang.Object

com.datastax.oss.driver.api.testinfra.simulacron.QueryCounter

public class QueryCounter
extends Object

A convenience utility that keeps track of the number of queries matching a filter received by BoundNodes.

One tricky thing about validating query counts in context of testing is in cases where you don't require waiting for a node to respond. In this case it's possible that a user would check count criteria before the node has even processed the message. This class offers the capability to wait a specified amount of time when asserting query arrival counts on nodes.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	QueryCounter.NotificationMode
static class	QueryCounter.QueryCounterBuilder

Method Summary

Modifier and Type	Method and Description
void	assertNodeCounts(int... counts) Asserts that the total number of requests received matcher filter criteria matches the expected count for each node within the configured time period.
void	assertTotalCount(int expected) Asserts that the total number of requests received matching filter criteria matches the expected count within the configured time period.
static QueryCounter.QueryCounterBuilder	builder(com.datastax.oss.simulacron.server.BoundTopic<?,?> topic) Creates a builder that tracks counts for the given BoundTopic (cluster, dc, node).
void	clearCounts() Clears all counters.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

builder

public static QueryCounter.QueryCounterBuilder builder(com.datastax.oss.simulacron.server.BoundTopic<?,?> topic)

Creates a builder that tracks counts for the given BoundTopic (cluster, dc, node).

clearCounts

public void clearCounts()

Clears all counters.

assertTotalCount

public void assertTotalCount(int expected)

Asserts that the total number of requests received matching filter criteria matches the expected count within the configured time period.

assertNodeCounts

public void assertNodeCounts(int... counts)

Asserts that the total number of requests received matcher filter criteria matches the expected count for each node within the configured time period.

Parameters:

counts - The expected node counts, with the value at each index matching the expected count for that node id (i.e. index 0 = node id 0 expected count).