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Isolation of blocking operation into the different thread poll

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This commit is contained in:
Michal Zeman
2020-02-09 10:39:31 +01:00
parent 2072882524
commit c9e9434fcd
8 changed files with 94 additions and 41 deletions
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23
common-components/src/main/java/com/mz/reactor/ddd/common/components/http/HttpErrorHandler.java
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@@ -1,23 +0,0 @@
package com.mz.reactor.ddd.common.components.http;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.web.reactive.function.server.ServerRequest;
import org.springframework.web.reactive.function.server.ServerResponse;
import reactor.core.publisher.Mono;
import java.util.function.Consumer;
import static org.springframework.web.reactive.function.BodyInserters.fromObject;
public enum HttpErrorHandler {
FN;
public <E extends Throwable> Mono<ServerResponse> onError(E e, ServerRequest req, Consumer<E> logger) {
logger.accept(e);
return Mono.just(ErrorMessage.builder().error(e.getMessage()).build())
.flatMap(error -> ServerResponse.status(HttpStatus.INTERNAL_SERVER_ERROR)
.contentType(MediaType.APPLICATION_JSON_UTF8)
.body(fromObject(error)));
}
}

12
common-components/src/main/java/com/mz/reactor/ddd/common/components/http/HttpHandler.java
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@@ -2,8 +2,10 @@ package com.mz.reactor.ddd.common.components.http;
import org.springframework.http.MediaType;
import org.springframework.web.reactive.function.server.RouterFunction;
import org.springframework.web.reactive.function.server.ServerRequest;
import org.springframework.web.reactive.function.server.ServerResponse;
import reactor.core.publisher.Mono;
import reactor.core.scheduler.Scheduler;
import static org.springframework.web.reactive.function.BodyInserters.fromObject;
@@ -11,6 +13,16 @@ public interface HttpHandler {
RouterFunction<ServerResponse> route();
default <T> Mono<T> bodyToMono(ServerRequest request, Class<T> clazz, Scheduler scheduler) {
return request.bodyToMono(String.class)
.flatMap(HttpHandlerFunctions.FN.deserializeJsonString(clazz, scheduler));
}
default <T> Mono<T> bodyToMono(ServerRequest request, Class<T> clazz) {
return request.bodyToMono(String.class)
.flatMap(HttpHandlerFunctions.FN.deserializeJsonString(clazz));
}
default <T> Mono<ServerResponse> mapToResponse(T result) {
return ServerResponse.ok()
.contentType(MediaType.APPLICATION_JSON_UTF8)

46
common-components/src/main/java/com/mz/reactor/ddd/common/components/http/HttpHandlerFunctions.java Normal file
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@@ -0,0 +1,46 @@
package com.mz.reactor.ddd.common.components.http;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.datatype.jdk8.Jdk8Module;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.web.reactive.function.server.ServerRequest;
import org.springframework.web.reactive.function.server.ServerResponse;
import reactor.core.publisher.Mono;
import reactor.core.scheduler.Scheduler;
import reactor.core.scheduler.Schedulers;
import javax.annotation.Nonnull;
import java.util.function.Consumer;
import java.util.function.Function;
import static org.springframework.web.reactive.function.BodyInserters.fromObject;
public enum HttpHandlerFunctions {
FN;
public <T> Function<String, Mono<T>> deserializeJsonString(@Nonnull Class<T> clazz, @Nonnull Scheduler scheduler) {
return value -> Mono.fromCallable(() -> {
ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(new Jdk8Module());
return mapper.readValue(value, clazz);
}).subscribeOn(scheduler);
}
public <T> Function<String, Mono<T>> deserializeJsonString(@Nonnull Class<T> clazz) {
return value -> Mono.fromCallable(() -> {
ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(new Jdk8Module());
return mapper.readValue(value, clazz);
}).subscribeOn(Schedulers.elastic());
}
public <E extends Throwable> Mono<ServerResponse> onError(E e, ServerRequest req, Consumer<E> logger) {
return Mono.fromCallable(() -> {
logger.accept(e);
return ErrorMessage.builder().error(e.getMessage()).build();
}).flatMap(error -> ServerResponse.status(HttpStatus.INTERNAL_SERVER_ERROR)
.contentType(MediaType.APPLICATION_JSON_UTF8)
.body(fromObject(error)));
}
}