, в которой рекомендуется использовать Jetty в качестве коннектора Http для WebClient.Я попробовал этот подход, улучшив цифры, с первым запросом ~ 800 мс.Это время является улучшением, но оно все еще далеко от RestTemplate , которое обычно занимает <200 мс. </p> Подход Netty (первый запрос 5 с):
Conf:
@Bean
public WebClient webClient() {
return WebClient.create();
}
Использование:
private final WebClient webClient;
@GetMapping(value="/wc", produces = APPLICATION_JSON_UTF8_VALUE)
public Mono<String> findWc() throws URISyntaxException {
URI uri = new URI("http://xxx");
final Mono<String> response = webClient.get().uri(uri).retrieve().bodyToMono(String.class);
return response;
}
Подход к причалу (первый запрос 800 мс):
Conf:
@Bean
public JettyResourceFactory resourceFactory() {
return new JettyResourceFactory();
}
@Bean
public WebClient webClient() {
ClientHttpConnector connector = new JettyClientHttpConnector(resourceFactory(), null);
return WebClient.builder().clientConnector(connector).build();
}
Использование: то же, что и раньше.
Есть еще одна "проблема" с подходом Jetty.При отключении сервера всегда выдается следующее исключение:
27-Dec-2018 11:24:20.463 INFO [jetty-http@74305db9-65] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading Illegal access: this web application instance has been stopped already. Could not load [org.eclipse.jetty.io.ManagedSelector$StopSelector]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [org.eclipse.jetty.io.ManagedSelector$StopSelector]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1348)
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1336)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1195)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1157)
at java.lang.Class.getDeclaringClass0(Native Method)
at java.lang.Class.getDeclaringClass(Class.java:1235)
at java.lang.Class.getEnclosingClass(Class.java:1277)
at java.lang.Class.getSimpleBinaryName(Class.java:1443)
at java.lang.Class.getSimpleName(Class.java:1309)
at org.eclipse.jetty.io.ManagedSelector$SelectorProducer.toString(ManagedSelector.java:534)
at java.lang.String.valueOf(String.java:2994)
at java.lang.StringBuilder.append(StringBuilder.java:131)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.getString(EatWhatYouKill.java:458)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.toStringLocked(EatWhatYouKill.java:447)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.toString(EatWhatYouKill.java:440)
at org.slf4j.helpers.MessageFormatter.safeObjectAppend(MessageFormatter.java:299)
at org.slf4j.helpers.MessageFormatter.deeplyAppendParameter(MessageFormatter.java:271)
at org.slf4j.helpers.MessageFormatter.arrayFormat(MessageFormatter.java:233)
at org.slf4j.helpers.MessageFormatter.arrayFormat(MessageFormatter.java:173)
at org.eclipse.jetty.util.log.JettyAwareLogger.log(JettyAwareLogger.java:680)
at org.eclipse.jetty.util.log.JettyAwareLogger.debug(JettyAwareLogger.java:224)
at org.eclipse.jetty.util.log.Slf4jLog.debug(Slf4jLog.java:97)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:288)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
at java.lang.Thread.run(Thread.java:748)
SLF4J: Failed toString() invocation on an object of type [org.eclipse.jetty.util.thread.strategy.EatWhatYouKill]
Reported exception:
java.lang.NoClassDefFoundError: org/eclipse/jetty/io/ManagedSelector$StopSelector
at java.lang.Class.getDeclaringClass0(Native Method)
at java.lang.Class.getDeclaringClass(Class.java:1235)
at java.lang.Class.getEnclosingClass(Class.java:1277)
at java.lang.Class.getSimpleBinaryName(Class.java:1443)
at java.lang.Class.getSimpleName(Class.java:1309)
at org.eclipse.jetty.io.ManagedSelector$SelectorProducer.toString(ManagedSelector.java:534)
at java.lang.String.valueOf(String.java:2994)
at java.lang.StringBuilder.append(StringBuilder.java:131)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.getString(EatWhatYouKill.java:458)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.toStringLocked(EatWhatYouKill.java:447)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.toString(EatWhatYouKill.java:440)
at org.slf4j.helpers.MessageFormatter.safeObjectAppend(MessageFormatter.java:299)
at org.slf4j.helpers.MessageFormatter.deeplyAppendParameter(MessageFormatter.java:271)
at org.slf4j.helpers.MessageFormatter.arrayFormat(MessageFormatter.java:233)
at org.slf4j.helpers.MessageFormatter.arrayFormat(MessageFormatter.java:173)
at org.eclipse.jetty.util.log.JettyAwareLogger.log(JettyAwareLogger.java:680)
at org.eclipse.jetty.util.log.JettyAwareLogger.debug(JettyAwareLogger.java:224)
at org.eclipse.jetty.util.log.Slf4jLog.debug(Slf4jLog.java:97)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:288)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: Illegal access: this web application instance has been stopped already. Could not load [org.eclipse.jetty.io.ManagedSelector$StopSelector]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1338)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1195)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1157)
... 25 more
Caused by: java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [org.eclipse.jetty.io.ManagedSelector$StopSelector]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1348)
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1336)
... 27 more
27-Dec-2018 11:24:20.467 INFO [jetty-http@74305db9-65] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading Illegal access: this web application instance has been stopped already. Could not load [ch.qos.logback.classic.spi.ThrowableProxy]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [ch.qos.logback.classic.spi.ThrowableProxy]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1348)
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1336)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1195)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1157)
at ch.qos.logback.classic.spi.LoggingEvent.<init>(LoggingEvent.java:119)
at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:419)
at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:383)
at ch.qos.logback.classic.Logger.log(Logger.java:765)
at org.eclipse.jetty.util.log.JettyAwareLogger.log(JettyAwareLogger.java:668)
at org.eclipse.jetty.util.log.JettyAwareLogger.warn(JettyAwareLogger.java:474)
at org.eclipse.jetty.util.log.Slf4jLog.warn(Slf4jLog.java:73)
at org.eclipse.jetty.util.log.Slf4jLog.warn(Slf4jLog.java:67)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.execute(EatWhatYouKill.java:375)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:305)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
at java.lang.Thread.run(Thread.java:748)
Exception in thread "jetty-http@74305db9-65" java.lang.NoClassDefFoundError: ch/qos/logback/classic/spi/ThrowableProxy
at ch.qos.logback.classic.spi.LoggingEvent.<init>(LoggingEvent.java:119)
at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:419)
at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:383)
at ch.qos.logback.classic.Logger.log(Logger.java:765)
at org.eclipse.jetty.util.log.JettyAwareLogger.log(JettyAwareLogger.java:668)
at org.eclipse.jetty.util.log.JettyAwareLogger.warn(JettyAwareLogger.java:474)
at org.eclipse.jetty.util.log.Slf4jLog.warn(Slf4jLog.java:73)
at org.eclipse.jetty.util.log.Slf4jLog.warn(Slf4jLog.java:67)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:740)
at java.lang.Thread.run(Thread.java:748)
Как мне избежать этого исключения?
Есть ли другой способ, которым мыможно использовать для улучшения медлительности первого запроса WebClient?