public async Task OpenCensusClientCache_HandlesAddOverflow()
{
var cache = new OpenCensusClientCache <string, Node>(10, TimeSpan.FromSeconds(1));
var nodes = Enumerable.Range(0, 10).Select(i => (i.ToString(), CreateNode((uint)i))).ToArray();
foreach (var node in nodes)
{
cache.AddOrUpdate(node.Item1, node.Item2);
}
await Task.Delay(2000);
var newNode = CreateNode(42);
cache.AddOrUpdate("new", newNode);
foreach (var node in nodes)
{
Assert.IsFalse(cache.TryGet(node.Item1, out _));
}
Assert.IsTrue(cache.TryGet("new", out var actualNewNode));
Assert.AreEqual(newNode, actualNewNode);
}
public async Task OpenCensusClientCache_TryGetUpdatesTimestamp()
{
var cache = new OpenCensusClientCache <string, Node>(10, TimeSpan.FromSeconds(1));
var nodes = Enumerable.Range(0, 10).Select(i => (i.ToString(), CreateNode((uint)i))).ToArray();
foreach (var node in nodes)
{
cache.AddOrUpdate(node.Item1, node.Item2);
}
await Task.Delay(2000);
Assert.IsTrue(cache.TryGet(nodes[0].Item1, out _));
cache.AddOrUpdate("new", CreateNode(42));
for (int i = 1; i < nodes.Length; i++)
{
// spin a bit to avoid flakiness
Assert.IsFalse(cache.TryGet(nodes[i].Item1, out _));
}
Assert.IsTrue(cache.TryGet("new", out _));
}
public void OpenCensusClientCache_GetNotExisting()
{
var cache = new OpenCensusClientCache <string, Node>();
Assert.IsFalse(cache.TryGet("client0", out var node));
Assert.IsNull(node);
}
public void OpenCensusClientCache_AddsAndUpdates()
{
var cache = new OpenCensusClientCache <string, Node>();
var node0 = CreateNode(0);
var node1 = CreateNode(1);
cache.AddOrUpdate("client0", node0);
cache.AddOrUpdate("client1", node1);
cache.AddOrUpdate("client0", node1);
Assert.IsTrue(cache.TryGet("client0", out var actualNode0));
Assert.AreEqual(node1, actualNode0);
Assert.IsTrue(cache.TryGet("client1", out var actualNode1));
Assert.AreEqual(node1, actualNode1);
}
/// <summary>
/// Gets or updates opencensus peer info.
/// </summary>
/// <param name="originalNode">Node in the message (or null).</param>
/// <param name="callContext">Call context.</param>
/// <param name="peerInfo">Cached peer info (or the new one).</param>
/// <returns>True is peer info was found/avaialble, false otherwise.</returns>
private bool TryGetOrUpdatePeerInfo(Node originalNode, ServerCallContext callContext, out Node peerInfo)
{
if (originalNode != null)
{
this.telemetryClient.TrackNodeEvent(originalNode, callContext.Method, callContext.Peer, this.ocToAiInstrumentationKey);
peerInfo = opencensusPeers.AddOrUpdate(callContext.Peer, originalNode);
return(true);
}
return(opencensusPeers.TryGet(callContext.Peer, out peerInfo));
}
public async Task OpenCensusClientCache_DoesNotRemoveItemsBeforeOverflow()
{
var cache = new OpenCensusClientCache <string, Node>(10, TimeSpan.FromSeconds(1));
var nodes = Enumerable.Range(0, 10).Select(i => (i.ToString(), CreateNode((uint)i))).ToArray();
foreach (var node in nodes)
{
cache.AddOrUpdate(node.Item1, node.Item2);
}
await Task.Delay(2000);
foreach (var node in nodes)
{
Assert.IsTrue(cache.TryGet(node.Item1, out _));
}
}