steveloughran commented on a change in pull request #1611: HADOOP-16612 Track Azure Blob File System client-perceived latency URL: https://github.com/apache/hadoop/pull/1611#discussion_r338644982
########## File path: hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azurebfs/services/TestLatencyTracker.java ########## @@ -0,0 +1,479 @@ +/** + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.hadoop.fs.azurebfs.services; + +import org.junit.Assert; +import org.junit.Test; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.net.URL; +import java.time.Duration; +import java.time.Instant; +import java.util.ArrayList; +import java.util.List; +import java.util.concurrent.Callable; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Executors; +import java.util.concurrent.Future; +import java.util.regex.Pattern; + +/** + * Test the latency tracker for abfs + * + */ +public final class TestLatencyTracker { + private static final Logger LOG = LoggerFactory.getLogger(TestLatencyTracker.class); + private static final int TEST_AGGREGATE_LATENCY = 42; + private final String filesystemName = "bogusFilesystemName"; + private final String accountName = "bogusAccountName"; + private final URL url; + + public TestLatencyTracker() throws Exception { + this.url = new URL("http", "www.microsoft.com", "/bogusFile"); + } + + @Test + public void verifyDisablingOfTracker() throws Exception { + // verify that disabling of the tracker works + LatencyTracker latencyTracker = new LatencyTracker(accountName, filesystemName, false); + + String latencyDetails = latencyTracker.getClientLatency(); + Assert.assertNull("LatencyTracker should be empty", latencyDetails); + + latencyTracker.recordClientLatency(Instant.now(), "disablingCaller", "disablingCallee", true, + new AbfsHttpOperation(url, "GET", new ArrayList<AbfsHttpHeader>())); + + latencyDetails = latencyTracker.getClientLatency(); + Assert.assertNull("LatencyTracker should return no record", latencyDetails); + } + + @Test + public void verifyTrackingForSingletonLatencyRecords() throws Exception { + // verify that tracking for singleton latency records works as expected + final int numTasks = 100; + LatencyTracker latencyTracker = new LatencyTracker(accountName, filesystemName, true); + + String latencyDetails = latencyTracker.getClientLatency(); + Assert.assertNull("LatencyTracker should be empty", latencyDetails); + + ExecutorService executorService = Executors.newCachedThreadPool(); + List<Callable<Integer>> tasks = new ArrayList<Callable<Integer>>(); + AbfsHttpOperation httpOperation = new AbfsHttpOperation(url, "GET", new ArrayList<AbfsHttpHeader>()); + + for (int i=0; i < numTasks; i++) { + Callable<Integer> c = new Callable<Integer>() { Review comment: use () -> lambda expression; callable is only needed on a backport to java 7 ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
