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+/**
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+ * Licensed to the Apache Software Foundation (ASF) under one
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+ * or more contributor license agreements. See the NOTICE file
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+ * distributed with this work for additional information
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+ * regarding copyright ownership. The ASF licenses this file
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+ * to you under the Apache License, Version 2.0 (the
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+ * "License"); you may not use this file except in compliance
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+ * with the License. You may obtain a copy of the License at
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+ *
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+ * http://www.apache.org/licenses/LICENSE-2.0
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+ *
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+ * Unless required by applicable law or agreed to in writing, software
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+ * distributed under the License is distributed on an "AS IS" BASIS,
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+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+ * See the License for the specific language governing permissions and
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+ * limitations under the License.
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+ */
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+
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+package org.apache.hadoop.fs.azurebfs;
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+
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+import java.io.IOException;
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+import java.util.Map;
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+
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+import org.slf4j.Logger;
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+import org.slf4j.LoggerFactory;
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+import org.junit.Test;
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+
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+import org.apache.hadoop.fs.FSDataInputStream;
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+import org.apache.hadoop.fs.FSDataOutputStream;
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+import org.apache.hadoop.io.IOUtils;
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+import org.apache.hadoop.fs.Path;
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+import org.apache.hadoop.fs.azurebfs.services.AbfsOutputStream;
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+import org.apache.hadoop.fs.azurebfs.services.AbfsRestOperation;
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+
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+public class ITestAbfsNetworkStatistics extends AbstractAbfsIntegrationTest {
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+
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+ private static final Logger LOG =
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+ LoggerFactory.getLogger(ITestAbfsNetworkStatistics.class);
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+ private static final int LARGE_OPERATIONS = 10;
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+
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+ public ITestAbfsNetworkStatistics() throws Exception {
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+ }
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+
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+ /**
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+ * Testing connections_made, send_request and bytes_send statistics in
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+ * {@link AbfsRestOperation}.
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+ */
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+ @Test
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+ public void testAbfsHttpSendStatistics() throws IOException {
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+ describe("Test to check correct values of statistics after Abfs http send "
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+ + "request is done.");
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+
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+ AzureBlobFileSystem fs = getFileSystem();
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+ Map<String, Long> metricMap;
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+ Path sendRequestPath = path(getMethodName());
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+ String testNetworkStatsString = "http_send";
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+ long connectionsMade, requestsSent, bytesSent;
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+
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+ /*
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+ * Creating AbfsOutputStream will result in 1 connection made and 1 send
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+ * request.
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+ */
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+ try (AbfsOutputStream out = createAbfsOutputStreamWithFlushEnabled(fs,
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+ sendRequestPath)) {
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+ out.write(testNetworkStatsString.getBytes());
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+
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+ /*
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+ * Flushes all outstanding data (i.e. the current unfinished packet)
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+ * from the client into the service on all DataNode replicas.
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+ */
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+ out.hflush();
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+
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+ metricMap = fs.getInstrumentationMap();
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+
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+ /*
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+ * Testing the network stats with 1 write operation.
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+ *
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+ * connections_made : 3(getFileSystem()) + 1(AbfsOutputStream) + 2(flush).
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+ *
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+ * send_requests : 1(getFileSystem()) + 1(AbfsOutputStream) + 2(flush).
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+ *
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+ * bytes_sent : bytes wrote in AbfsOutputStream.
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+ */
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+ connectionsMade = assertAbfsStatistics(AbfsStatistic.CONNECTIONS_MADE,
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+ 6, metricMap);
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+ requestsSent = assertAbfsStatistics(AbfsStatistic.SEND_REQUESTS, 4,
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+ metricMap);
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+ bytesSent = assertAbfsStatistics(AbfsStatistic.BYTES_SENT,
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+ testNetworkStatsString.getBytes().length, metricMap);
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+
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+ }
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+
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+ // To close the AbfsOutputStream 1 connection is made and 1 request is sent.
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+ connectionsMade++;
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+ requestsSent++;
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+
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+ try (AbfsOutputStream out = createAbfsOutputStreamWithFlushEnabled(fs,
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+ sendRequestPath)) {
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+
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+ for (int i = 0; i < LARGE_OPERATIONS; i++) {
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+ out.write(testNetworkStatsString.getBytes());
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+
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+ /*
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+ * 1 flush call would create 2 connections and 2 send requests.
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+ * when hflush() is called it will essentially trigger append() and
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+ * flush() inside AbfsRestOperation. Both of which calls
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+ * executeHttpOperation() method which creates a connection and sends
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+ * requests.
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+ */
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+ out.hflush();
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+ }
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+
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+ metricMap = fs.getInstrumentationMap();
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+
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+ /*
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+ * Testing the network stats with Large amount of bytes sent.
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+ *
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+ * connections made : connections_made(Last assertion) + 1
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+ * (AbfsOutputStream) + LARGE_OPERATIONS * 2(flush).
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+ *
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+ * send requests : requests_sent(Last assertion) + 1(AbfsOutputStream) +
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+ * LARGE_OPERATIONS * 2(flush).
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+ *
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+ * bytes sent : bytes_sent(Last assertion) + LARGE_OPERATIONS * (bytes
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+ * wrote each time).
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+ *
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+ */
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+ assertAbfsStatistics(AbfsStatistic.CONNECTIONS_MADE,
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+ connectionsMade + 1 + LARGE_OPERATIONS * 2, metricMap);
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+ assertAbfsStatistics(AbfsStatistic.SEND_REQUESTS,
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+ requestsSent + 1 + LARGE_OPERATIONS * 2, metricMap);
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+ assertAbfsStatistics(AbfsStatistic.BYTES_SENT,
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+ bytesSent + LARGE_OPERATIONS * (testNetworkStatsString.getBytes().length),
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+ metricMap);
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+
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+ }
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+
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+ }
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+
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+ /**
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+ * Testing get_response and bytes_received in {@link AbfsRestOperation}.
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+ */
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+ @Test
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+ public void testAbfsHttpResponseStatistics() throws IOException {
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+ describe("Test to check correct values of statistics after Http "
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+ + "Response is processed.");
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+
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+ AzureBlobFileSystem fs = getFileSystem();
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+ Path getResponsePath = path(getMethodName());
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+ Map<String, Long> metricMap;
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+ String testResponseString = "some response";
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+ long getResponses, bytesReceived;
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+
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+ FSDataOutputStream out = null;
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+ FSDataInputStream in = null;
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+ try {
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+
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+ /*
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+ * Creating a File and writing some bytes in it.
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+ *
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+ * get_response : 3(getFileSystem) + 1(OutputStream creation) + 2
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+ * (Writing data in Data store).
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+ *
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+ */
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+ out = fs.create(getResponsePath);
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+ out.write(testResponseString.getBytes());
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+ out.hflush();
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+
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+ // open would require 1 get response.
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+ in = fs.open(getResponsePath);
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+ // read would require 1 get response and also get the bytes received.
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+ int result = in.read();
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+
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+ // Confirming read isn't -1.
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+ LOG.info("Result of read operation : {}", result);
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+
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+ metricMap = fs.getInstrumentationMap();
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+
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+ /*
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+ * Testing values of statistics after writing and reading a buffer.
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+ *
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+ * get_responses - 6(above operations) + 1(open()) + 1 (read()).
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+ *
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+ * bytes_received - This should be equal to bytes sent earlier.
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+ */
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+ getResponses = assertAbfsStatistics(AbfsStatistic.GET_RESPONSES, 8,
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+ metricMap);
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+ // Testing that bytes received is equal to bytes sent.
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+ long bytesSend = metricMap.get(AbfsStatistic.BYTES_SENT.getStatName());
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+ bytesReceived = assertAbfsStatistics(AbfsStatistic.BYTES_RECEIVED,
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+ bytesSend,
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+ metricMap);
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+
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+ } finally {
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+ IOUtils.cleanupWithLogger(LOG, out, in);
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+ }
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+
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+ // To close the streams 1 response is received.
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+ getResponses++;
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+
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+ try {
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+
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+ /*
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+ * Creating a file and writing buffer into it. Also recording the
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+ * buffer for future read() call.
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+ * This creating outputStream and writing requires 2 *
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+ * (LARGE_OPERATIONS) get requests.
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+ */
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+ StringBuilder largeBuffer = new StringBuilder();
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+ out = fs.create(getResponsePath);
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+ for (int i = 0; i < LARGE_OPERATIONS; i++) {
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+ out.write(testResponseString.getBytes());
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+ out.hflush();
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+ largeBuffer.append(testResponseString);
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+ }
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+
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+ // Open requires 1 get_response.
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+ in = fs.open(getResponsePath);
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+
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+ /*
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+ * Reading the file which was written above. This read() call would
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+ * read bytes equal to the bytes that was written above.
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+ * Get response would be 1 only.
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+ */
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+ in.read(0, largeBuffer.toString().getBytes(), 0,
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+ largeBuffer.toString().getBytes().length);
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+
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+ metricMap = fs.getInstrumentationMap();
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+
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+ /*
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+ * Testing the statistics values after writing and reading a large buffer.
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+ *
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+ * get_response : get_responses(Last assertion) + 1
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+ * (OutputStream) + 2 * LARGE_OPERATIONS(Writing and flushing
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+ * LARGE_OPERATIONS times) + 1(open()) + 1(read()).
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+ *
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+ * bytes_received : bytes_received(Last assertion) + LARGE_OPERATIONS *
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+ * bytes wrote each time (bytes_received is equal to bytes wrote in the
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+ * File).
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+ *
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+ */
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+ assertAbfsStatistics(AbfsStatistic.BYTES_RECEIVED,
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+ bytesReceived + LARGE_OPERATIONS * (testResponseString.getBytes().length),
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+ metricMap);
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+ assertAbfsStatistics(AbfsStatistic.GET_RESPONSES,
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+ getResponses + 3 + 2 * LARGE_OPERATIONS, metricMap);
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+
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+ } finally {
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+ IOUtils.cleanupWithLogger(LOG, out, in);
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+ }
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+ }
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+
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+}
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Mehakmeet Singh