ping performance

This commit is contained in:
anhefti 2020-02-26 14:04:15 +01:00
parent 379c786064
commit 49abd4e5b0
3 changed files with 18 additions and 573 deletions

View file

@ -26,13 +26,13 @@ import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.util.MultiValueMap;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;
import ch.ethz.seb.sebserver.gbl.api.API;
@ -270,29 +270,30 @@ public class ExamAPI_V1_Controller {
this.executor);
}
private static final ResponseEntity<String> EMPTY_PING_RESPONSE = ResponseEntity
.ok()
.build();
@RequestMapping(
path = API.EXAM_API_PING_ENDPOINT,
method = RequestMethod.POST,
consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE,
produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
public void ping(
@RequestHeader(name = API.EXAM_API_SEB_CONNECTION_TOKEN, required = true) final String connectionToken,
@RequestParam(name = API.EXAM_API_PING_TIMESTAMP, required = true) final long timestamp,
@RequestParam(name = API.EXAM_API_PING_NUMBER, required = false) final int pingNumber,
final HttpServletResponse response) {
public void ping(final HttpServletRequest request, final HttpServletResponse response) {
final String connectionToken = request.getHeader(API.EXAM_API_SEB_CONNECTION_TOKEN);
final String timeStampString = request.getParameter(API.EXAM_API_PING_TIMESTAMP);
final String pingNumString = request.getParameter(API.EXAM_API_PING_NUMBER);
final String instruction = this.sebClientConnectionService
.notifyPing(connectionToken, timestamp, pingNumber);
.notifyPing(
connectionToken,
Long.parseLong(timeStampString),
pingNumString != null ? Integer.parseInt(pingNumString) : -1);
if (instruction == null) {
response.setStatus(HttpStatus.NO_CONTENT.value());
return;
}
try {
response.setStatus(HttpStatus.OK.value());
response.getOutputStream().write(instruction.getBytes());
} catch (final IOException e) {
log.error("Failed to send instruction as response: {}", connectionToken, e);
@ -303,6 +304,7 @@ public class ExamAPI_V1_Controller {
path = API.EXAM_API_EVENT_ENDPOINT,
method = RequestMethod.POST,
consumes = MediaType.APPLICATION_JSON_UTF8_VALUE)
@ResponseStatus(value = HttpStatus.NO_CONTENT)
public void event(
@RequestHeader(name = API.EXAM_API_SEB_CONNECTION_TOKEN, required = true) final String connectionToken,
@RequestBody(required = true) final ClientEvent event) {

View file

@ -1,557 +0,0 @@
/*
* Copyright (c) 2019 ETH Zürich, Educational Development and Technology (LET)
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
package ch.ethz.seb.sebserver;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Properties;
import java.util.Random;
import java.util.UUID;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.ParameterizedTypeReference;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.http.client.SimpleClientHttpRequestFactory;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.security.oauth2.client.OAuth2RestTemplate;
import org.springframework.security.oauth2.client.http.OAuth2ErrorHandler;
import org.springframework.security.oauth2.client.token.grant.client.ClientCredentialsResourceDetails;
import org.springframework.security.oauth2.common.OAuth2AccessToken;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import ch.ethz.seb.sebserver.gbl.Constants;
import ch.ethz.seb.sebserver.gbl.api.API;
import ch.ethz.seb.sebserver.gbl.model.session.RunningExamInfo;
import ch.ethz.seb.sebserver.gbl.util.Utils;
public class HTTPClientBot {
private static final long ONE_SECOND = 1000; // milliseconds
private static final long TEN_SECONDS = 10 * ONE_SECOND;
private static final long ONE_MINUTE = 60 * ONE_SECOND;
@SuppressWarnings("unused")
private static final long ONE_HOUR = 60 * ONE_MINUTE;
private static final Logger log = LoggerFactory.getLogger(HTTPClientBot.class);
private final ExecutorService executorService = Executors.newFixedThreadPool(20);
private final List<String> scopes = Arrays.asList("read", "write");
private final String webserviceAddress;
private final String accessTokenEndpoint;
private final String clientId;
private final String clientSecret;
private final String apiPath;
private final String apiVersion;
private final String examId;
private final String institutionId;
private final int numberOfConnections;
private final long establishDelay;
private final long pingInterval;
private final long pingPause;
private final long pingPauseDelay;
private final long errorInterval;
private final long warnInterval;
private final long runtime;
private final int connectionAttempts;
private final Random random = new Random();
public HTTPClientBot(final Properties properties) {
//this.webserviceAddress = properties.getProperty("webserviceAddress", "http://ralph.ethz.ch:8080");
this.webserviceAddress = properties.getProperty("webserviceAddress", "http://localhost:8080");
//this.webserviceAddress = properties.getProperty("webserviceAddress", "https://seb.test-swissmooc.ch");
this.accessTokenEndpoint = properties.getProperty("accessTokenEndpoint", "/oauth/token");
this.clientId = properties.getProperty("clientId", "test");
this.clientSecret = properties.getProperty("clientSecret", "test");
//
// this.clientId = properties.getProperty("clientId", "B48_1~UnU3c0K]0c");
// this.clientSecret =
// properties.getProperty("clientSecret",
// "io0]PRpzUNVWv*Bg^B=@4!jH$r^Y$CmgheETsd}4ewIXEMq~XPHszIr+$a`S$z[(");
this.apiPath = properties.getProperty("apiPath", "/exam-api");
this.apiVersion = properties.getProperty("apiVersion", "v1");
// this.examId = properties.getProperty("examId", "2");
// this.institutionId = properties.getProperty("institutionId", "1");
this.examId = properties.getProperty("examId", "2");
this.institutionId = properties.getProperty("institutionId", "1");
this.numberOfConnections = Integer.parseInt(properties.getProperty("numberOfConnections", "100"));
this.pingInterval = Long.parseLong(properties.getProperty("pingInterval", "200"));
this.establishDelay = Long.parseLong(properties.getProperty("establishDelay", "0"));
this.pingPause = Long.parseLong(properties.getProperty("pingPause", "20000"));
this.pingPauseDelay = Long.parseLong(properties.getProperty("pingPauseDelay", "5000"));
this.errorInterval = Long.parseLong(properties.getProperty("errorInterval", String.valueOf(TEN_SECONDS)));
this.warnInterval = Long.parseLong(properties.getProperty("errorInterval", String.valueOf(TEN_SECONDS / 2)));
// this.runtime = Long.parseLong(properties.getProperty("runtime", String.valueOf(ONE_MINUTE)));
this.runtime = Long.parseLong(properties.getProperty("runtime", String.valueOf(ONE_MINUTE)));
this.connectionAttempts = Integer.parseInt(properties.getProperty("connectionAttempts", "1"));
for (int i = 0; i < this.numberOfConnections; i++) {
this.executorService.execute(new ConnectionBot("connection_" + getRandomName()));
}
this.executorService.shutdown();
}
private String getRandomName() {
final StringBuilder sb = new StringBuilder(String.valueOf(this.random.nextInt(100)));
while (sb.length() < 3) {
sb.insert(0, "0");
}
return sb.toString();
}
public static void main(final String[] args) {
new HTTPClientBot(System.getProperties());
}
private final class ConnectionBot implements Runnable {
private final String name;
private final OAuth2RestTemplate restTemplate;
private final String handshakeURI = HTTPClientBot.this.webserviceAddress +
HTTPClientBot.this.apiPath + "/" +
HTTPClientBot.this.apiVersion + API.EXAM_API_HANDSHAKE_ENDPOINT;
private final String configurartionURI = HTTPClientBot.this.webserviceAddress +
HTTPClientBot.this.apiPath + "/" +
HTTPClientBot.this.apiVersion + API.EXAM_API_CONFIGURATION_REQUEST_ENDPOINT;
private final String pingURI = HTTPClientBot.this.webserviceAddress +
HTTPClientBot.this.apiPath + "/" +
HTTPClientBot.this.apiVersion + API.EXAM_API_PING_ENDPOINT;
private final String eventURI = HTTPClientBot.this.webserviceAddress +
HTTPClientBot.this.apiPath + "/" +
HTTPClientBot.this.apiVersion + API.EXAM_API_EVENT_ENDPOINT;
private final HttpEntity<?> connectBody;
protected ConnectionBot(final String name) {
this.name = name;
this.restTemplate = createRestTemplate(null);
final MultiValueMap<String, String> headers = new LinkedMultiValueMap<>();
headers.set(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_FORM_URLENCODED_VALUE);
this.connectBody = new HttpEntity<>(API.PARAM_INSTITUTION_ID +
Constants.FORM_URL_ENCODED_NAME_VALUE_SEPARATOR +
HTTPClientBot.this.institutionId
// + Constants.FORM_URL_ENCODED_SEPARATOR
// + API.EXAM_API_PARAM_EXAM_ID
// + Constants.FORM_URL_ENCODED_NAME_VALUE_SEPARATOR
// + HTTPClientBot.this.examId
,
headers);
}
@Override
public void run() {
log.info("ConnectionBot {} : Client-Connection-Bot started: {}\n"
+ "webserviceAddress: {}\n"
+ "accessTokenEndpoint: {}\n"
+ "clientId: {}\n"
+ "clientSecret: {}\n"
+ "apiPath: {}\n"
+ "apiVersion: {}\n"
+ "examId: {}\n"
+ "institutionId: {}\n"
+ "pingInterval: {}\n"
+ "errorInterval: {}\n"
+ "runtime: {}\n", this.name,
HTTPClientBot.this.webserviceAddress,
HTTPClientBot.this.accessTokenEndpoint,
HTTPClientBot.this.clientId,
HTTPClientBot.this.clientSecret,
HTTPClientBot.this.apiPath,
HTTPClientBot.this.apiVersion,
HTTPClientBot.this.examId,
HTTPClientBot.this.institutionId,
HTTPClientBot.this.pingInterval,
HTTPClientBot.this.errorInterval);
int attempt = 0;
String connectionToken = null;
while (connectionToken == null && attempt < HTTPClientBot.this.connectionAttempts) {
attempt++;
log.info("ConnectionBot {} : Try to request access-token; attempt: {}", this.name, attempt);
try {
final OAuth2AccessToken accessToken = this.restTemplate.getAccessToken();
log.info("ConnectionBot {} : Got access token: {}", this.name, accessToken);
connectionToken = createConnection();
} catch (final Exception e) {
log.error("ConnectionBot {} : Failed to request access-token: ", this.name, e);
if (attempt >= HTTPClientBot.this.connectionAttempts) {
log.error("ConnectionBot {} : Gave up afer {} connection attempts: ", this.name, attempt);
return;
}
}
}
final MultiValueMap<String, String> headers = new LinkedMultiValueMap<>();
headers.set(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_FORM_URLENCODED_VALUE);
headers.set(API.EXAM_API_SEB_CONNECTION_TOKEN, connectionToken);
final MultiValueMap<String, String> eventHeaders = new LinkedMultiValueMap<>();
eventHeaders.set(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_UTF8_VALUE);
eventHeaders.set(API.EXAM_API_SEB_CONNECTION_TOKEN, connectionToken);
if (connectionToken != null) {
if (getConfig(headers) && establishConnection(headers)) {
final PingEntity pingHeader = new PingEntity(headers);
final EventEntity errorHeader = new EventEntity(eventHeaders, "ERROR_LOG");
final EventEntity warnHeader = new EventEntity(eventHeaders, "WARN_LOG");
try {
final long startTime = System.currentTimeMillis();
final long endTime = startTime + HTTPClientBot.this.runtime;
final long pingPauseStart = startTime + HTTPClientBot.this.pingPauseDelay;
final long pingPauseEnd = pingPauseStart + HTTPClientBot.this.pingPause;
long currentTime = startTime;
long lastPingTime = startTime;
long lastErrorTime = startTime;
long lastWarnTime = startTime;
while (currentTime < endTime) {
if (currentTime - lastPingTime >= HTTPClientBot.this.pingInterval &&
!(currentTime > pingPauseStart && currentTime < pingPauseEnd)) {
pingHeader.next();
if (!sendPing(pingHeader)) {
// expecting a quit instruction was sent here
return;
}
lastPingTime = currentTime;
}
if (currentTime - lastErrorTime >= HTTPClientBot.this.errorInterval) {
errorHeader.next();
sendEvent(errorHeader);
lastErrorTime = currentTime;
}
if (currentTime - lastWarnTime >= HTTPClientBot.this.warnInterval) {
warnHeader.next();
sendEvent(warnHeader);
lastWarnTime = currentTime;
}
try {
Thread.sleep(50);
} catch (final Exception e) {
}
currentTime = System.currentTimeMillis();
}
} catch (final Throwable t) {
log.error("ConnectionBot {} : Error sending events: ", this.name, t);
} finally {
disconnect(connectionToken);
}
}
}
}
private String createConnection() {
log.info("ConnectionBot {} : init connection", this.name);
try {
final ResponseEntity<Collection<RunningExamInfo>> exchange = this.restTemplate.exchange(
this.handshakeURI,
HttpMethod.POST,
this.connectBody,
new ParameterizedTypeReference<Collection<RunningExamInfo>>() {
});
final HttpStatus statusCode = exchange.getStatusCode();
if (statusCode.isError()) {
throw new RuntimeException("Webservice answered with error: " + exchange.getBody());
}
final Collection<RunningExamInfo> body = exchange.getBody();
final String token = exchange.getHeaders().getFirst(API.EXAM_API_SEB_CONNECTION_TOKEN);
log.info("ConnectionBot {} : successfully created connection, token: {} body: {} ", this.name, token,
body);
return token;
} catch (final Exception e) {
log.error("ConnectionBot {} : Failed to init connection", this.name, e);
return null;
}
}
public boolean getConfig(final MultiValueMap<String, String> headers) {
final HttpEntity<?> configHeader = new HttpEntity<>(headers);
log.info("ConnectionBot {} : get SEB Configuration", this.name);
try {
final ResponseEntity<byte[]> exchange = this.restTemplate.exchange(
this.configurartionURI + "?" + API.EXAM_API_PARAM_EXAM_ID +
Constants.FORM_URL_ENCODED_NAME_VALUE_SEPARATOR +
HTTPClientBot.this.examId,
HttpMethod.GET,
configHeader,
new ParameterizedTypeReference<byte[]>() {
});
final HttpStatus statusCode = exchange.getStatusCode();
if (statusCode.isError()) {
throw new RuntimeException("Webservice answered with error: " + exchange.getBody());
}
final byte[] config = exchange.getBody();
if (ArrayUtils.isEmpty(config)) {
log.error("No Exam config get from API. processing anyway");
}
if (log.isDebugEnabled()) {
log.debug("ConnectionBot {} : successfully requested exam config: " + Utils.toString(config),
this.name);
} else {
log.info("ConnectionBot {} : successfully requested exam config", this.name);
}
return true;
} catch (final Exception e) {
log.error("ConnectionBot {} : Failed get SEB Configuration", this.name, e);
return false;
}
}
public boolean establishConnection(final MultiValueMap<String, String> headers) {
if (HTTPClientBot.this.establishDelay > 0) {
try {
log.info("Wait for connection activation -> {}", HTTPClientBot.this.establishDelay);
Thread.sleep(HTTPClientBot.this.establishDelay);
} catch (final Exception e) {
log.error("Failed to wait for connection activiation -> {} : {}", HTTPClientBot.this.establishDelay,
e.getMessage());
}
}
final HttpEntity<?> configHeader = new HttpEntity<>(
API.EXAM_API_USER_SESSION_ID +
Constants.FORM_URL_ENCODED_NAME_VALUE_SEPARATOR +
this.name,
headers);
log.info("ConnectionBot {} : Trying to establish SEB client connection", this.name);
try {
final ResponseEntity<String> exchange = this.restTemplate.exchange(
this.handshakeURI,
HttpMethod.PUT,
configHeader,
new ParameterizedTypeReference<String>() {
});
final HttpStatus statusCode = exchange.getStatusCode();
if (statusCode.isError()) {
throw new RuntimeException("Webservice answered with error: " + exchange.getBody());
}
log.info("ConnectionBot {} : successfully established SEB client connection", this.name);
return true;
} catch (final Exception e) {
log.error("ConnectionBot {} : Failed get established SEB client connection", this.name, e);
return false;
}
}
private boolean sendPing(final HttpEntity<String> pingHeader) {
try {
final ResponseEntity<String> exchange = this.restTemplate.exchange(
this.pingURI,
HttpMethod.POST,
pingHeader,
new ParameterizedTypeReference<String>() {
});
if (exchange.hasBody() && exchange.getBody().contains("SEB_QUIT")) {
return false;
}
return true;
} catch (final Exception e) {
log.error("ConnectionBot {} : Failed send ping", this.name, e);
return false;
}
}
private boolean sendEvent(final HttpEntity<String> eventHeader) {
try {
this.restTemplate.exchange(
this.eventURI,
HttpMethod.POST,
eventHeader,
new ParameterizedTypeReference<String>() {
});
return true;
} catch (final Exception e) {
log.error("ConnectionBot {} : Failed send event", this.name, e);
return false;
}
}
public boolean disconnect(final String connectionToken) {
final MultiValueMap<String, String> headers = new LinkedMultiValueMap<>();
headers.set(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_FORM_URLENCODED_VALUE);
headers.set(API.EXAM_API_SEB_CONNECTION_TOKEN, connectionToken);
final HttpEntity<?> configHeader = new HttpEntity<>(headers);
log.info("ConnectionBot {} : Trying to delete SEB client connection", this.name);
try {
final ResponseEntity<String> exchange = this.restTemplate.exchange(
this.handshakeURI,
HttpMethod.DELETE,
configHeader,
new ParameterizedTypeReference<String>() {
});
final HttpStatus statusCode = exchange.getStatusCode();
if (statusCode.isError()) {
throw new RuntimeException("Webservice answered with error: " + exchange.getBody());
}
log.info("ConnectionBot {} : successfully deleted SEB client connection", this.name);
return true;
} catch (final Exception e) {
log.error("ConnectionBot {} : Failed get deleted SEB client connection", this.name, e);
return false;
}
}
}
private OAuth2RestTemplate createRestTemplate(final String scopes) {
final ClientCredentialsResourceDetails clientCredentialsResourceDetails =
new ClientCredentialsResourceDetails();
clientCredentialsResourceDetails.setAccessTokenUri(this.webserviceAddress + this.accessTokenEndpoint);
clientCredentialsResourceDetails.setClientId(this.clientId);
clientCredentialsResourceDetails.setClientSecret(this.clientSecret);
if (StringUtils.isBlank(scopes)) {
clientCredentialsResourceDetails.setScope(this.scopes);
} else {
clientCredentialsResourceDetails.setScope(
Arrays.asList(StringUtils.split(scopes, Constants.LIST_SEPARATOR)));
}
final OAuth2RestTemplate restTemplate = new OAuth2RestTemplate(clientCredentialsResourceDetails);
restTemplate.setErrorHandler(new OAuth2ErrorHandler(clientCredentialsResourceDetails) {
@Override
public void handleError(final ClientHttpResponse response) throws IOException {
System.out.println("********************** handleError: " + response.getStatusCode());
super.handleError(response);
}
});
restTemplate
.getMessageConverters()
.add(0, new StringHttpMessageConverter(Charset.forName("UTF-8")));
//restTemplate.setRetryBadAccessTokens(true);
final SimpleClientHttpRequestFactory simpleClientHttpRequestFactory = new SimpleClientHttpRequestFactory();
simpleClientHttpRequestFactory.setReadTimeout(5000);
simpleClientHttpRequestFactory.setOutputStreaming(false);
restTemplate.setRequestFactory(simpleClientHttpRequestFactory);
return restTemplate;
}
private static class PingEntity extends HttpEntity<String> {
private final String pingBodyTemplate = API.EXAM_API_PING_TIMESTAMP +
Constants.FORM_URL_ENCODED_NAME_VALUE_SEPARATOR +
"%s" +
Constants.FORM_URL_ENCODED_SEPARATOR +
API.EXAM_API_PING_NUMBER +
Constants.FORM_URL_ENCODED_NAME_VALUE_SEPARATOR +
"%s";
private long timestamp = 0;
private int count = 0;
protected PingEntity(final MultiValueMap<String, String> headers) {
super(headers);
}
void next() {
this.timestamp = System.currentTimeMillis();
this.count++;
}
@Override
public String getBody() {
return String.format(this.pingBodyTemplate, this.timestamp, this.count);
}
@Override
public boolean hasBody() {
return true;
}
}
private static class EventEntity extends HttpEntity<String> {
private final String eventBodyTemplate =
"{ \"type\": \"%s\", \"timestamp\": %s, \"text\": \"some error " + UUID.randomUUID() + " \" }";
private long timestamp = 0;
private final String eventType;
protected EventEntity(final MultiValueMap<String, String> headers, final String eventType) {
super(headers);
this.eventType = eventType;
}
void next() {
this.timestamp = System.currentTimeMillis();
}
@Override
public String getBody() {
return String.format(this.eventBodyTemplate, this.eventType, this.timestamp);
}
@Override
public boolean hasBody() {
return true;
}
}
}

View file

@ -492,7 +492,7 @@ public class SebConnectionTest extends ExamAPIIntegrationTester {
final MockHttpServletResponse sendPing = super.sendPing(accessToken, connectionToken, 1);
// check correct response
assertTrue(HttpStatus.OK.value() == sendPing.getStatus());
assertTrue(HttpStatus.NO_CONTENT.value() == sendPing.getStatus());
}
@Test
@ -536,7 +536,7 @@ public class SebConnectionTest extends ExamAPIIntegrationTester {
"testEvent1");
// check correct response
assertTrue(HttpStatus.OK.value() == sendEvent.getStatus());
assertTrue(HttpStatus.NO_CONTENT.value() == sendEvent.getStatus());
// check event stored on db
List<ClientEventRecord> events = this.clientEventRecordMapper
@ -563,7 +563,7 @@ public class SebConnectionTest extends ExamAPIIntegrationTester {
"testEvent2");
// check correct response
assertTrue(HttpStatus.OK.value() == sendEvent.getStatus());
assertTrue(HttpStatus.NO_CONTENT.value() == sendEvent.getStatus());
// check event stored on db
events = this.clientEventRecordMapper
@ -595,7 +595,7 @@ public class SebConnectionTest extends ExamAPIIntegrationTester {
100.0,
"testEvent1");
// check correct response
assertTrue(HttpStatus.OK.value() == sendEvent.getStatus());
assertTrue(HttpStatus.NO_CONTENT.value() == sendEvent.getStatus());
final List<ClientEventRecord> events = this.clientEventRecordMapper
.selectByExample()
@ -620,7 +620,7 @@ public class SebConnectionTest extends ExamAPIIntegrationTester {
100.0,
"testEvent1");
// check correct response
assertTrue(HttpStatus.OK.value() == sendEvent.getStatus());
assertTrue(HttpStatus.NO_CONTENT.value() == sendEvent.getStatus());
final List<ClientEventRecord> events = this.clientEventRecordMapper
.selectByExample()