Как отладить запрос клиента Quarkus / SmallRye

Я использовал фильтр и перехватчик в качестве обработчика исключений, чтобы решить эту проблему:

Фильтр для печати журналов:

import lombok.extern.java.Log;
import org.glassfish.jersey.message.MessageUtils;

import javax.ws.rs.WebApplicationException;
import javax.ws.rs.client.ClientRequestContext;
import javax.ws.rs.client.ClientRequestFilter;
import javax.ws.rs.client.ClientResponseContext;
import javax.ws.rs.client.ClientResponseFilter;
import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerRequestFilter;
import javax.ws.rs.container.ContainerResponseContext;
import javax.ws.rs.container.ContainerResponseFilter;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.WriterInterceptor;
import javax.ws.rs.ext.WriterInterceptorContext;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;
import java.nio.charset.Charset;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;
import java.util.concurrent.atomic.AtomicLong;

/**
 * Based on org.glassfish.jersey.filter.LoggingFilter
 */
@Log
public class LoggingFilter implements ContainerRequestFilter, ClientRequestFilter, ContainerResponseFilter,
                                      ClientResponseFilter, WriterInterceptor {

    private static final String NOTIFICATION_PREFIX = "* ";

    private static final String REQUEST_PREFIX = "> ";

    private static final String RESPONSE_PREFIX = "< ";

    private static final String ENTITY_LOGGER_PROPERTY = LoggingFilter.class.getName() + ".entityLogger";

    private static final String LOGGING_ID_PROPERTY = LoggingFilter.class.getName() + ".id";

    private static final Comparator<Map.Entry<String, List<String>>> COMPARATOR = (o1, o2) -> o1.getKey().compareToIgnoreCase(o2.getKey());

    private static final int DEFAULT_MAX_ENTITY_SIZE = 8 * 1024;

    private final AtomicLong _id = new AtomicLong(0);

    private final int maxEntitySize;

    public LoggingFilter() {

        this.maxEntitySize = LoggingFilter.DEFAULT_MAX_ENTITY_SIZE;
    }


    private void log(final StringBuilder b) {

        LoggingFilter.log.info(b.toString());
    }

    private StringBuilder prefixId(final StringBuilder b, final long id) {

        b.append(id).append(" ");
        return b;
    }

    private void printRequestLine(final StringBuilder b, final String note, final long id, final String method, final URI uri) {

        this.prefixId(b, id).append(LoggingFilter.NOTIFICATION_PREFIX)
                .append(note)
                .append(" on thread ").append(Thread.currentThread().getName())
                .append("\n");
        this.prefixId(b, id).append(LoggingFilter.REQUEST_PREFIX).append(method).append(" ")
                .append(uri.toASCIIString()).append("\n");
    }

    private void printResponseLine(final StringBuilder b, final String note, final long id, final int status) {

        this.prefixId(b, id).append(LoggingFilter.NOTIFICATION_PREFIX)
                .append(note)
                .append(" on thread ").append(Thread.currentThread().getName()).append("\n");
        this.prefixId(b, id).append(LoggingFilter.RESPONSE_PREFIX)
                .append(status)
                .append("\n");
    }

    private void printPrefixedHeaders(final StringBuilder b,
                                      final long id,
                                      final String prefix,
                                      final MultivaluedMap<String, String> headers) {

        for (final Map.Entry<String, List<String>> headerEntry : this.getSortedHeaders(headers.entrySet())) {
            final List<?> val = headerEntry.getValue();
            final String header = headerEntry.getKey();

            if(val.size() == 1) {
                this.prefixId(b, id).append(prefix).append(header).append(": ").append(val.get(0)).append("\n");
            }
            else {
                final StringBuilder sb = new StringBuilder();
                boolean add = false;
                for (final Object s : val) {
                    if(add) {
                        sb.append(',');
                    }
                    add = true;
                    sb.append(s);
                }
                this.prefixId(b, id).append(prefix).append(header).append(": ").append(sb.toString()).append("\n");
            }
        }
    }

    private Set<Map.Entry<String, List<String>>> getSortedHeaders(final Set<Map.Entry<String, List<String>>> headers) {

        final TreeSet<Map.Entry<String, List<String>>> sortedHeaders = new TreeSet<>(LoggingFilter.COMPARATOR);
        sortedHeaders.addAll(headers);
        return sortedHeaders;
    }

    private InputStream logInboundEntity(final StringBuilder b, InputStream stream, final Charset charset) throws IOException {

        if(!stream.markSupported()) {
            stream = new BufferedInputStream(stream);
        }
        stream.mark(this.maxEntitySize + 1);
        final byte[] entity = new byte[this.maxEntitySize + 1];
        final int entitySize = stream.read(entity);
        b.append(new String(entity, 0, Math.min(entitySize, this.maxEntitySize), charset));
        if(entitySize > this.maxEntitySize) {
            b.append("...more...");
        }
        b.append('\n');
        stream.reset();
        return stream;
    }

    @Override
    public void filter(final ClientRequestContext context) throws IOException {

        final long id = this._id.incrementAndGet();
        context.setProperty(LoggingFilter.LOGGING_ID_PROPERTY, id);

        final StringBuilder b = new StringBuilder();

        this.printRequestLine(b, "Sending client request", id, context.getMethod(), context.getUri());
        this.printPrefixedHeaders(b, id, LoggingFilter.REQUEST_PREFIX, context.getStringHeaders());

        if(context.hasEntity()) {
            final OutputStream stream = new LoggingFilter.LoggingStream(b, context.getEntityStream());
            context.setEntityStream(stream);
            context.setProperty(LoggingFilter.ENTITY_LOGGER_PROPERTY, stream);
            // not calling log(b) here - it will be called by the interceptor
        }
        else {
            this.log(b);
        }
    }

    @Override
    public void filter(final ClientRequestContext requestContext, final ClientResponseContext responseContext)
    throws IOException {

        final Object requestId = requestContext.getProperty(LoggingFilter.LOGGING_ID_PROPERTY);
        final long id = requestId != null ? (Long) requestId : this._id.incrementAndGet();

        final StringBuilder b = new StringBuilder();

        this.printResponseLine(b, "Client response received", id, responseContext.getStatus());
        this.printPrefixedHeaders(b, id, LoggingFilter.RESPONSE_PREFIX, responseContext.getHeaders());

        if(responseContext.hasEntity()) {
            responseContext.setEntityStream(this.logInboundEntity(b, responseContext.getEntityStream(),
                    MessageUtils.getCharset(responseContext.getMediaType())));
        }

        this.log(b);
    }

    @Override
    public void filter(final ContainerRequestContext context) throws IOException {

        final long id = this._id.incrementAndGet();
        context.setProperty(LoggingFilter.LOGGING_ID_PROPERTY, id);

        final StringBuilder b = new StringBuilder();

        this.printRequestLine(b, "Server has received a request", id, context.getMethod(), context.getUriInfo().getRequestUri());
        this.printPrefixedHeaders(b, id, LoggingFilter.REQUEST_PREFIX, context.getHeaders());

        if(context.hasEntity()) {
            context.setEntityStream(
                    this.logInboundEntity(b, context.getEntityStream(), MessageUtils.getCharset(context.getMediaType())));
        }

        this.log(b);
    }

    @Override
    public void filter(final ContainerRequestContext requestContext, final ContainerResponseContext responseContext)
    throws IOException {

        final Object requestId = requestContext.getProperty(LoggingFilter.LOGGING_ID_PROPERTY);
        final long id = requestId != null ? (Long) requestId : this._id.incrementAndGet();

        final StringBuilder b = new StringBuilder();

        this.printResponseLine(b, "Server responded with a response", id, responseContext.getStatus());
        this.printPrefixedHeaders(b, id, LoggingFilter.RESPONSE_PREFIX, responseContext.getStringHeaders());

        if(responseContext.hasEntity()) {
            final OutputStream stream = new LoggingFilter.LoggingStream(b, responseContext.getEntityStream());
            responseContext.setEntityStream(stream);
            requestContext.setProperty(LoggingFilter.ENTITY_LOGGER_PROPERTY, stream);
            // not calling log(b) here - it will be called by the interceptor
        }
        else {
            this.log(b);
        }
    }

    @Override
    public void aroundWriteTo(final WriterInterceptorContext writerInterceptorContext)
    throws IOException, WebApplicationException {

        final LoggingFilter.LoggingStream stream = (LoggingFilter.LoggingStream) writerInterceptorContext.getProperty(LoggingFilter.ENTITY_LOGGER_PROPERTY);
        writerInterceptorContext.proceed();
        if(stream != null) {
            this.log(stream.getStringBuilder(MessageUtils.getCharset(writerInterceptorContext.getMediaType())));
        }
    }

    private class LoggingStream extends FilterOutputStream {

        private final StringBuilder b;

        private final ByteArrayOutputStream baos = new ByteArrayOutputStream();

        LoggingStream(final StringBuilder b, final OutputStream inner) {

            super(inner);

            this.b = b;
        }

        StringBuilder getStringBuilder(final Charset charset) {
            // write entity to the builder
            final byte[] entity = this.baos.toByteArray();

            this.b.append(new String(entity, 0, Math.min(entity.length, LoggingFilter.this.maxEntitySize), charset));
            if(entity.length > LoggingFilter.this.maxEntitySize) {
                this.b.append("...more...");
            }
            this.b.append('\n');

            return this.b;
        }

        @Override
        public void write(final int i) throws IOException {

            if(this.baos.size() <= LoggingFilter.this.maxEntitySize) {
                this.baos.write(i);
            }
            this.out.write(i);
        }

    }

}

Использование фильтра в остальном клиентском интерфейсе:

@Path("/")
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
@RegisterRestClient
@RegisterProvider(LoggingFilter.class)
public interface Api {

    @GET
    @Path("/foo/bar")
    FooBar getFoorBar();

Теперь полезные данные запроса и ответа печатаются в журнале.

После этого перехватчик для обработки исключений:

Квалификатор:

@InterceptorBinding
@Target({TYPE, METHOD})
@Retention(RUNTIME)
public @interface ExceptionHandler {

}

Перехватчик:

@Interceptor
@ExceptionHandler
public class ExceptionHandlerInterceptor  {

    @AroundInvoke
    public Object processRequest(final InvocationContext invocationContext) {

        try {
            return invocationContext.proceed();

        }
        catch (final WebApplicationException e) {

            final int status = e.getResponse().getStatus();
            final String errorJson = e.getResponse().readEntity(String.class);

            final Jsonb jsonb = JsonbBuilder.create();

            //"ErrorMessageDTO" is waited when a error occurs
            ErrorMessage errorMessage = jsonb.fromJson(errorJson, ErrorMessage.class);

            //isValid method verifies if the conversion was successful
            if(errorMessage.isValid()) {
                return Response
                        .status(status)
                        .entity(errorMessage)
                        .build();
            }

            errorMessage = ErrorMessage
                    .builder()
                    .statusCode(status)
                    .statusMessage(e.getMessage())
                    .success(false)
                    .build();

            return Response
                    .status(status)
                    .entity(errorMessage)
                    .build();
        }
        catch (final Exception e) {

            e.printStackTrace();

            return Response
                    .status(Status.INTERNAL_SERVER_ERROR)
                    .entity(ErrorMessage
                            .builder()
                            .statusCode(Status.INTERNAL_SERVER_ERROR.getStatusCode())
                            .statusMessage(e.getMessage())
                            .success(false)
                            .build())
                    .build();
        }
    }

}

Использование перехватчика:

@Path("/resource")
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
@ExceptionHandler
@Traced
@Log
public class ResourceEndpoint {

    @Inject
    @RestClient
    Api api;

    @GET
    @Path("/latest")
    public Response getFooBarLatest() {

        return Response.ok(this.api.getFoorBar()).build();
    }

Бин ErrorMessage:

@RegisterForReflection
@Getter
@Setter
@AllArgsConstructor
@NoArgsConstructor
@Data
@Builder
public class ErrorMessage  {

    @JsonbProperty("status_message")
    private String statusMessage;

    @JsonbProperty("status_code")
    private Integer statusCode;

    @JsonbProperty("success")
    private boolean success = true;

    @JsonbTransient
    public boolean isValid() {

        return this.statusMessage != null && !this.statusMessage.isEmpty() && this.statusCode != null;
    }

}

PS: Используя Ломбок!