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Warn when SimpleAsyncTaskExecutor is used

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Issue: SPR-16203
This commit is contained in:
Rossen Stoyanchev
2018-07-11 11:07:25 -04:00
parent 1b1bc7f5b5
commit 7b3a72f483
6 changed files with 96 additions and 37 deletions
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33
spring-web/src/main/java/org/springframework/web/context/request/async/WebAsyncManager.java
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@@ -30,10 +30,12 @@ import org.apache.commons.logging.LogFactory;
import org.springframework.core.task.AsyncTaskExecutor;
import org.springframework.core.task.SimpleAsyncTaskExecutor;
import org.springframework.core.task.SyncTaskExecutor;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.async.DeferredResult.DeferredResultHandler;
import org.springframework.web.server.adapter.WebHttpHandlerBuilder;
/**
* The central class for managing asynchronous request processing, mainly intended
@@ -61,6 +63,9 @@ public final class WebAsyncManager {
private static final Object RESULT_NONE = new Object();
private static final AsyncTaskExecutor DEFAULT_TASK_EXECUTOR =
new SimpleAsyncTaskExecutor(WebHttpHandlerBuilder.class.getSimpleName());
private static final Log logger = LogFactory.getLog(WebAsyncManager.class);
private static final CallableProcessingInterceptor timeoutCallableInterceptor =
@@ -69,10 +74,12 @@ public final class WebAsyncManager {
private static final DeferredResultProcessingInterceptor timeoutDeferredResultInterceptor =
new TimeoutDeferredResultProcessingInterceptor();
private static Boolean taskExecutorWarning = true;
private AsyncWebRequest asyncWebRequest;
private AsyncTaskExecutor taskExecutor = new SimpleAsyncTaskExecutor(this.getClass().getSimpleName());
private AsyncTaskExecutor taskExecutor = DEFAULT_TASK_EXECUTOR;
private volatile Object concurrentResult = RESULT_NONE;
@@ -277,6 +284,9 @@ public final class WebAsyncManager {
if (executor != null) {
this.taskExecutor = executor;
}
else {
logExecutorWarning();
}
List<CallableProcessingInterceptor> interceptors = new ArrayList<>();
interceptors.add(webAsyncTask.getInterceptor());
@@ -330,6 +340,27 @@ public final class WebAsyncManager {
}
}
@SuppressWarnings("ConstantConditions")
private void logExecutorWarning() {
if (taskExecutorWarning && logger.isWarnEnabled()) {
synchronized (DEFAULT_TASK_EXECUTOR) {
AsyncTaskExecutor executor = this.taskExecutor;
if (taskExecutorWarning &&
(executor instanceof SimpleAsyncTaskExecutor || executor instanceof SyncTaskExecutor)) {
String executorTypeName = executor.getClass().getSimpleName();
logger.warn("\n!!!\n" +
"An Executor is required to handle java.util.concurrent.Callable return values.\n" +
"Please, configure a TaskExecutor in the MVC config under \"async support\".\n" +
"The " + executorTypeName + " currently in use is not suitable under load.\n" +
"-------------------------------\n" +
"Request URI: '" + formatRequestUri() + "'\n" +
"!!!");
taskExecutorWarning = false;
}
}
}
}
private String formatRequestUri() {
HttpServletRequest request = this.asyncWebRequest.getNativeRequest(HttpServletRequest.class);
return request != null ? request.getRequestURI() : "servlet container";