Play Framework - ErrorHandler 未被调用
Play Framework - ErrorHandler is not being invoked
我在 Play framework (2.6) 中遇到问题,同时尝试使用 HttpErrorHandler 机制处理特定的异常情景.
我在根包中有一个简单的 ErrorHandler:
import play.Logger;
import play.http.HttpErrorHandler;
import play.mvc.Http;
import play.mvc.Result;
import play.mvc.Results;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;
public class ErrorHandler implements HttpErrorHandler {
@Override
public CompletionStage<Result> onClientError(Http.RequestHeader request, int statusCode, String message) {
Logger.error("client error");
return CompletableFuture.completedFuture(Results.status(statusCode, "A client error occurred: " + message));
}
@Override
public CompletionStage<Result> onServerError(Http.RequestHeader request, Throwable exception) {
Logger.error("server error");
return CompletableFuture.completedFuture(
Results.internalServerError("A server error occurred: " + exception.getMessage()));
}
}
我创建了一个自定义控制器来处理 资产:
package controllers;
import org.apache.commons.lang3.StringUtils;
import play.api.mvc.Action;
import play.api.mvc.AnyContent;
import play.mvc.Controller;
import javax.inject.Inject;
public class AssetsCustomController extends Controller {
private final Assets assets;
@Inject
public AssetsCustomController(Assets assets) {
this.assets = assets;
}
public Action<AnyContent> at(String path, String file) {
if (StringUtils.isEmpty(path)) {
throw new IllegalArgumentException();
}
return assets.at(path, file, false);
}
}
我已经检查了 ErrorHandler 并且在所有情况下都工作正常,除了在 AssetsCustomController 中从此方法抛出异常时:
public Action<AnyContent> at(String path, String file) {
if (StringUtils.isEmpty(path)) {
throw new IllegalArgumentException();
}
return assets.at(path, file, false);
}
例如,当 IllegalArgumentException 被抛出时,我的 ErrorHandler 被忽略并且 Play 使用他的本地错误处理程序。这是堆栈跟踪:
play.api.http.HttpErrorHandlerExceptions$$anon: Execution exception[[IllegalArgumentException: null]]
at play.api.http.HttpErrorHandlerExceptions$.throwableToUsefulException(HttpErrorHandler.scala:255)
at play.api.http.DefaultHttpErrorHandler.onServerError(HttpErrorHandler.scala:182)
at play.api.http.DefaultHttpErrorHandler$.onServerError(HttpErrorHandler.scala:286)
at play.core.server.Server.logExceptionAndGetResult(Server.scala:53)
at play.core.server.Server.getHandlerFor(Server.scala:83)
at play.core.server.Server.getHandlerFor$(Server.scala:49)
at play.core.server.AkkaHttpServer.getHandlerFor(AkkaHttpServer.scala:42)
at play.core.server.AkkaHttpServer.getHandler(AkkaHttpServer.scala:215)
at play.core.server.AkkaHttpServer.handleRequest(AkkaHttpServer.scala:195)
at play.core.server.AkkaHttpServer.$anonfun$createServerBinding(AkkaHttpServer.scala:107)
Caused by: java.lang.IllegalArgumentException: null
at controllers.AssetsCustomController.at(AssetsCustomController.java:20)
at router.Routes$$anonfun$routes.$anonfun$applyOrElse(Routes.scala:183)
at play.core.routing.HandlerInvokerFactory$$anon$$anon.call(HandlerInvoker.scala:61)
at play.core.routing.GeneratedRouter$$anon.call(GeneratedRouter.scala:251)
at router.Routes$$anonfun$routes.$anonfun$applyOrElse(Routes.scala:183)
at play.core.routing.GeneratedRouter.$anonfun$call(GeneratedRouter.scala:99)
at scala.util.Either.fold(Either.scala:118)
at play.core.routing.GeneratedRouter.call(GeneratedRouter.scala:99)
at router.Routes$$anonfun$routes.applyOrElse(Routes.scala:182)
at router.Routes$$anonfun$routes.applyOrElse(Routes.scala:154)
[解决方案]
感谢回答 Flo354,我能够解决问题,AssetsCustomController 是这样的:
package controllers;
import akka.stream.Materializer;
import org.springframework.util.StringUtils;
import play.mvc.Controller;
import play.mvc.Result;
import javax.inject.Inject;
import java.util.concurrent.CompletionStage;
public class AssetsCustomController extends Controller {
private final Assets assets;
private final Materializer materializer;
@Inject
public AssetsCustomController(Materializer materializer, Assets assets) {
this.materializer = materializer;
this.assets = assets;
}
public CompletionStage<Result> at(String path, String file) {
if (StringUtils.isEmpty(path)) {
throw new IllegalArgumentException();
}
return assets.at(path, file, false).asJava().apply(request()).run(materializer);
}
}
您的 Action<AnyContent>
是 Scala API 的一部分,这意味着它不使用 Java 部分。
您的自定义错误处理程序仅适用于 Java 来源。查看您的堆栈跟踪
play.api.http.HttpErrorHandlerExceptions$$anon: Execution exception[[IllegalArgumentException: null]]
at play.api.http.HttpErrorHandlerExceptions$.throwableToUsefulException(HttpErrorHandler.scala:255)
at play.api.http.DefaultHttpErrorHandler.onServerError(HttpErrorHandler.scala:182)
at play.api.http.DefaultHttpErrorHandler$.onServerError(HttpErrorHandler.scala:286)
....
有play.api.something
可以看到是scala
您可以通过发回 CompletionStage<Result>
来解决此问题
public CompletionStage<Result> test(String path, String file) {
if (StringUtils.isEmpty(path)) {
throw new IllegalArgumentException();
}
return assets.at(path, file, false).asJava().apply(request()).run(materializer);
}
并且在您的控制器中,不要忘记注入 akka.stream.Materializer
的实例
希望对您有所帮助!
我在 Play framework (2.6) 中遇到问题,同时尝试使用 HttpErrorHandler 机制处理特定的异常情景.
我在根包中有一个简单的 ErrorHandler:
import play.Logger;
import play.http.HttpErrorHandler;
import play.mvc.Http;
import play.mvc.Result;
import play.mvc.Results;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;
public class ErrorHandler implements HttpErrorHandler {
@Override
public CompletionStage<Result> onClientError(Http.RequestHeader request, int statusCode, String message) {
Logger.error("client error");
return CompletableFuture.completedFuture(Results.status(statusCode, "A client error occurred: " + message));
}
@Override
public CompletionStage<Result> onServerError(Http.RequestHeader request, Throwable exception) {
Logger.error("server error");
return CompletableFuture.completedFuture(
Results.internalServerError("A server error occurred: " + exception.getMessage()));
}
}
我创建了一个自定义控制器来处理 资产:
package controllers;
import org.apache.commons.lang3.StringUtils;
import play.api.mvc.Action;
import play.api.mvc.AnyContent;
import play.mvc.Controller;
import javax.inject.Inject;
public class AssetsCustomController extends Controller {
private final Assets assets;
@Inject
public AssetsCustomController(Assets assets) {
this.assets = assets;
}
public Action<AnyContent> at(String path, String file) {
if (StringUtils.isEmpty(path)) {
throw new IllegalArgumentException();
}
return assets.at(path, file, false);
}
}
我已经检查了 ErrorHandler 并且在所有情况下都工作正常,除了在 AssetsCustomController 中从此方法抛出异常时:
public Action<AnyContent> at(String path, String file) {
if (StringUtils.isEmpty(path)) {
throw new IllegalArgumentException();
}
return assets.at(path, file, false);
}
例如,当 IllegalArgumentException 被抛出时,我的 ErrorHandler 被忽略并且 Play 使用他的本地错误处理程序。这是堆栈跟踪:
play.api.http.HttpErrorHandlerExceptions$$anon: Execution exception[[IllegalArgumentException: null]]
at play.api.http.HttpErrorHandlerExceptions$.throwableToUsefulException(HttpErrorHandler.scala:255)
at play.api.http.DefaultHttpErrorHandler.onServerError(HttpErrorHandler.scala:182)
at play.api.http.DefaultHttpErrorHandler$.onServerError(HttpErrorHandler.scala:286)
at play.core.server.Server.logExceptionAndGetResult(Server.scala:53)
at play.core.server.Server.getHandlerFor(Server.scala:83)
at play.core.server.Server.getHandlerFor$(Server.scala:49)
at play.core.server.AkkaHttpServer.getHandlerFor(AkkaHttpServer.scala:42)
at play.core.server.AkkaHttpServer.getHandler(AkkaHttpServer.scala:215)
at play.core.server.AkkaHttpServer.handleRequest(AkkaHttpServer.scala:195)
at play.core.server.AkkaHttpServer.$anonfun$createServerBinding(AkkaHttpServer.scala:107)
Caused by: java.lang.IllegalArgumentException: null
at controllers.AssetsCustomController.at(AssetsCustomController.java:20)
at router.Routes$$anonfun$routes.$anonfun$applyOrElse(Routes.scala:183)
at play.core.routing.HandlerInvokerFactory$$anon$$anon.call(HandlerInvoker.scala:61)
at play.core.routing.GeneratedRouter$$anon.call(GeneratedRouter.scala:251)
at router.Routes$$anonfun$routes.$anonfun$applyOrElse(Routes.scala:183)
at play.core.routing.GeneratedRouter.$anonfun$call(GeneratedRouter.scala:99)
at scala.util.Either.fold(Either.scala:118)
at play.core.routing.GeneratedRouter.call(GeneratedRouter.scala:99)
at router.Routes$$anonfun$routes.applyOrElse(Routes.scala:182)
at router.Routes$$anonfun$routes.applyOrElse(Routes.scala:154)
[解决方案]
感谢回答 Flo354,我能够解决问题,AssetsCustomController 是这样的:
package controllers;
import akka.stream.Materializer;
import org.springframework.util.StringUtils;
import play.mvc.Controller;
import play.mvc.Result;
import javax.inject.Inject;
import java.util.concurrent.CompletionStage;
public class AssetsCustomController extends Controller {
private final Assets assets;
private final Materializer materializer;
@Inject
public AssetsCustomController(Materializer materializer, Assets assets) {
this.materializer = materializer;
this.assets = assets;
}
public CompletionStage<Result> at(String path, String file) {
if (StringUtils.isEmpty(path)) {
throw new IllegalArgumentException();
}
return assets.at(path, file, false).asJava().apply(request()).run(materializer);
}
}
您的 Action<AnyContent>
是 Scala API 的一部分,这意味着它不使用 Java 部分。
您的自定义错误处理程序仅适用于 Java 来源。查看您的堆栈跟踪
play.api.http.HttpErrorHandlerExceptions$$anon: Execution exception[[IllegalArgumentException: null]]
at play.api.http.HttpErrorHandlerExceptions$.throwableToUsefulException(HttpErrorHandler.scala:255)
at play.api.http.DefaultHttpErrorHandler.onServerError(HttpErrorHandler.scala:182)
at play.api.http.DefaultHttpErrorHandler$.onServerError(HttpErrorHandler.scala:286)
....
有play.api.something
您可以通过发回 CompletionStage<Result>
public CompletionStage<Result> test(String path, String file) {
if (StringUtils.isEmpty(path)) {
throw new IllegalArgumentException();
}
return assets.at(path, file, false).asJava().apply(request()).run(materializer);
}
并且在您的控制器中,不要忘记注入 akka.stream.Materializer
希望对您有所帮助!