Turn off logging of TemplateEngine (#7284)

#### What type of PR is this?

/kind bug
/area core
/milestone 2.20.x

#### What this PR does / why we need it:

This PR turns off the logging of TemplateEngine to prevent too many annoying and useless logs.

Please note that the TemplateExceptions won't be eat up because we have a global error handler to log them.

#### Which issue(s) this PR fixes:

Fixes https://github.com/halo-dev/halo/issues/4468

#### Special notes for your reviewer:

Steps to verify:
- Start Halo instance
- Execute command `ab -c 100 -n 10000 -H 'Accept: text/html' -H 'Cache-Control: no-cache' http://localhost:8090/` and then press `Ctrl + C` to stop the ab process.
- See the logs of Halo instance.

#### Does this PR introduce a user-facing change?

```release-note
解决日志中出现大量 InterruptedException 异常的问题
```

application/src/main/java/run/halo/app/theme/engine/HaloTemplateEngine.java

@@ -1,7 +1,9 @@
 package run.halo.app.theme.engine;
 
+import java.nio.channels.ClosedByInterruptException;
 import java.nio.charset.Charset;
 import java.util.Set;
+import lombok.extern.slf4j.Slf4j;
 import org.reactivestreams.Publisher;
 import org.springframework.core.io.buffer.DataBuffer;
 import org.springframework.core.io.buffer.DataBufferFactory;
@@ -9,6 +11,7 @@ import org.springframework.http.MediaType;
 import org.thymeleaf.context.IContext;
 import org.thymeleaf.messageresolver.IMessageResolver;
 import org.thymeleaf.spring6.SpringWebFluxTemplateEngine;
+import reactor.core.Exceptions;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 import reactor.core.scheduler.Schedulers;
@@ -18,6 +21,7 @@ import reactor.core.scheduler.Schedulers;
  *
  * @author johnniang
  */
+@Slf4j
 public class HaloTemplateEngine extends SpringWebFluxTemplateEngine {
 
     private final IMessageResolver messageResolver;
@@ -43,20 +47,22 @@ public class HaloTemplateEngine extends SpringWebFluxTemplateEngine {
         // while processing.
         if (publisher instanceof Mono<DataBuffer> mono) {
             return mono.subscribeOn(Schedulers.boundedElastic())
-                // We should switch back to non-blocking thread.
-                // See https://github.com/spring-projects/spring-framework/issues/26958
-                // for more details.
-                .publishOn(Schedulers.parallel());
+                .doOnError(Exception.class, e -> this.logTemplateError(e, template));
         }
         if (publisher instanceof Flux<DataBuffer> flux) {
-            return flux
-                .subscribeOn(Schedulers.boundedElastic())
-                // We should switch back to non-blocking thread.
-                // See https://github.com/spring-projects/spring-framework/issues/26958
-                // for more details.
-                .publishOn(Schedulers.parallel());
+            return flux.subscribeOn(Schedulers.boundedElastic())
+                .doOnError(Exception.class, e -> this.logTemplateError(e, template));
         }
         return publisher;
     }
 
+    private void logTemplateError(Exception e, String template) {
+        if (Exceptions.unwrap(e.getCause()) instanceof InterruptedException) {
+            log.warn("Interrupted while processing template: {}", template);
+        }
+        if (e.getCause() instanceof ClosedByInterruptException) {
+            log.warn("Interrupted while outputting template: {}", template);
+        }
+        // other exceptions will be caught by error handler
+    }
 }

application/src/main/resources/application-dev.yaml

@@ -32,6 +32,7 @@ halo:
 logging:
   level:
     run.halo.app: DEBUG
+    web: DEBUG
     org.springframework.boot.autoconfigure.web.reactive.error.AbstractErrorWebExceptionHandler: DEBUG
 springdoc:
   cache:

application/src/main/resources/application.yaml

@@ -57,6 +57,8 @@ springdoc:
   writer-with-order-by-keys: true
 
 logging:
+  level:
+    org.thymeleaf.TemplateEngine: OFF
   file:
     name: ${halo.work-dir}/logs/halo.log
   logback: