Further deprecate the handler API

- whenever the deprecated API is being used added logging of warnings
- also removed any calls to the deprecated API from the existing integration tests. That's a breaking change in the way that we're not creating the default handlers in testing framework. I think that's fine cause we haven't setup any functionality for it neither have we documented any of its usage anywhere

fixes gh-371

micrometer-tracing-bridges/micrometer-tracing-bridge-brave/src/main/java/io/micrometer/tracing/brave/bridge/BraveHttpClientHandler.java

@@ -44,15 +44,18 @@ public class BraveHttpClientHandler implements HttpClientHandler {
     public BraveHttpClientHandler(
             brave.http.HttpClientHandler<brave.http.HttpClientRequest, brave.http.HttpClientResponse> delegate) {
         this.delegate = delegate;
+        DeprecatedClassLogger.logWarning(getClass());
     }
 
     @Override
     public Span handleSend(HttpClientRequest request) {
+        DeprecatedClassLogger.logWarning(getClass());
         return BraveSpan.fromBrave(this.delegate.handleSend(BraveHttpClientRequest.toBrave(request)));
     }
 
     @Override
     public Span handleSend(HttpClientRequest request, TraceContext parent) {
+        DeprecatedClassLogger.logWarning(getClass());
         brave.Span span = this.delegate.handleSendWithParent(BraveHttpClientRequest.toBrave(request),
                 BraveTraceContext.toBrave(parent));
         if (!span.isNoop()) {
@@ -63,6 +66,7 @@ public Span handleSend(HttpClientRequest request, TraceContext parent) {
 
     @Override
     public void handleReceive(HttpClientResponse response, Span span) {
+        DeprecatedClassLogger.logWarning(getClass());
         if (response == null) {
             if (log.isDebugEnabled()) {
                 log.debug("Response is null, will not handle receiving of span [" + span + "]");

micrometer-tracing-bridges/micrometer-tracing-bridge-brave/src/main/java/io/micrometer/tracing/brave/bridge/BraveHttpRequestParser.java

@@ -36,8 +36,10 @@ public class BraveHttpRequestParser implements HttpRequestParser {
      * Creates a new version of a {@link BraveHttpRequestParser}.
      * @param delegate Brave version of {@link HttpRequestParser}
      */
+    @Deprecated
     public BraveHttpRequestParser(brave.http.HttpRequestParser delegate) {
         this.delegate = delegate;
+        DeprecatedClassLogger.logWarning(getClass());
     }
 
     /**
@@ -46,6 +48,7 @@ public BraveHttpRequestParser(brave.http.HttpRequestParser delegate) {
      * @return Brave version of the parser
      */
     public static brave.http.HttpRequestParser toBrave(HttpRequestParser parser) {
+        DeprecatedClassLogger.logWarning(BraveHttpRequestParser.class);
         if (parser instanceof BraveHttpRequestParser) {
             return ((BraveHttpRequestParser) parser).delegate;
         }
@@ -55,6 +58,7 @@ public static brave.http.HttpRequestParser toBrave(HttpRequestParser parser) {
 
     @Override
     public void parse(HttpRequest request, TraceContext context, SpanCustomizer span) {
+        DeprecatedClassLogger.logWarning(getClass());
         this.delegate.parse(BraveHttpRequest.toBrave(request), BraveTraceContext.toBrave(context),
                 BraveSpanCustomizer.toBrave(span));
     }

micrometer-tracing-bridges/micrometer-tracing-bridge-brave/src/main/java/io/micrometer/tracing/brave/bridge/BraveHttpResponseParser.java

@@ -38,6 +38,7 @@ public class BraveHttpResponseParser implements HttpResponseParser {
      */
     public BraveHttpResponseParser(brave.http.HttpResponseParser delegate) {
         this.delegate = delegate;
+        DeprecatedClassLogger.logWarning(getClass());
     }
 
     /**
@@ -46,6 +47,7 @@ public BraveHttpResponseParser(brave.http.HttpResponseParser delegate) {
      * @return Brave parser
      */
     public static brave.http.HttpResponseParser toBrave(HttpResponseParser parser) {
+        DeprecatedClassLogger.logWarning(BraveHttpRequestParser.class);
         if (parser instanceof BraveHttpResponseParser) {
             return ((BraveHttpResponseParser) parser).delegate;
         }
@@ -55,6 +57,7 @@ public static brave.http.HttpResponseParser toBrave(HttpResponseParser parser) {
 
     @Override
     public void parse(HttpResponse response, TraceContext context, SpanCustomizer span) {
+        DeprecatedClassLogger.logWarning(getClass());
         this.delegate.parse(BraveHttpResponse.toBrave(response), BraveTraceContext.toBrave(context),
                 BraveSpanCustomizer.toBrave(span));
     }

micrometer-tracing-bridges/micrometer-tracing-bridge-brave/src/main/java/io/micrometer/tracing/brave/bridge/BraveHttpServerHandler.java

@@ -39,15 +39,18 @@ public class BraveHttpServerHandler implements HttpServerHandler {
     public BraveHttpServerHandler(
             brave.http.HttpServerHandler<brave.http.HttpServerRequest, brave.http.HttpServerResponse> delegate) {
         this.delegate = delegate;
+        DeprecatedClassLogger.logWarning(getClass());
     }
 
     @Override
     public Span handleReceive(HttpServerRequest request) {
+        DeprecatedClassLogger.logWarning(getClass());
         return BraveSpan.fromBrave(this.delegate.handleReceive(BraveHttpServerRequest.toBrave(request)));
     }
 
     @Override
     public void handleSend(HttpServerResponse response, Span span) {
+        DeprecatedClassLogger.logWarning(getClass());
         this.delegate.handleSend(BraveHttpServerResponse.toBrave(response), BraveSpan.toBrave(span));
     }
 

micrometer-tracing-bridges/micrometer-tracing-bridge-brave/src/main/java/io/micrometer/tracing/brave/bridge/BraveSamplerFunction.java

@@ -24,7 +24,9 @@
  * @param <T> type of the input, for example a request or method
  * @author Marcin Grzejszczak
  * @since 1.0.0
+ * @deprecated scheduled for removal in 1.4.0
  */
+@Deprecated
 @SuppressWarnings("unchecked")
 public final class BraveSamplerFunction<T> implements SamplerFunction<T> {
 
@@ -35,6 +37,7 @@ public final class BraveSamplerFunction<T> implements SamplerFunction<T> {
      * @param samplerFunction Brave {@link SamplerFunction}
      */
     public BraveSamplerFunction(brave.sampler.SamplerFunction<T> samplerFunction) {
+        DeprecatedClassLogger.logWarning(getClass());
         this.samplerFunction = samplerFunction;
     }
 
@@ -47,11 +50,13 @@ public BraveSamplerFunction(brave.sampler.SamplerFunction<T> samplerFunction) {
     @Deprecated
     public static brave.sampler.SamplerFunction<brave.http.HttpRequest> toHttpBrave(
             SamplerFunction<HttpRequest> samplerFunction) {
+        DeprecatedClassLogger.logWarning(BraveSamplerFunction.class);
         return arg -> samplerFunction.trySample(BraveHttpRequest.fromBrave(arg));
     }
 
     @Override
     public Boolean trySample(T arg) {
+        DeprecatedClassLogger.logWarning(getClass());
         return this.samplerFunction.trySample(arg);
     }
 

micrometer-tracing-bridges/micrometer-tracing-bridge-brave/src/main/java/io/micrometer/tracing/brave/bridge/DeprecatedClassLogger.java

@@ -0,0 +1,34 @@
+/**
+ * Copyright 2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.micrometer.tracing.brave.bridge;
+
+import io.micrometer.common.util.internal.logging.InternalLogger;
+import io.micrometer.common.util.internal.logging.InternalLoggerFactory;
+
+/**
+ * @deprecated scheduled for removal in 1.4.0
+ */
+@Deprecated
+final class DeprecatedClassLogger {
+
+    private static final InternalLogger log = InternalLoggerFactory.getInstance(DeprecatedClassLogger.class);
+
+    static void logWarning(Class<?> clazz) {
+        log.warn("The class <{}> is scheduled for removal in the next minor. Please migrate away from using it.",
+                clazz);
+    }
+
+}

micrometer-tracing-bridges/micrometer-tracing-bridge-otel/src/main/java/io/micrometer/tracing/otel/bridge/DefaultHttpClientAttributesGetter.java

@@ -35,15 +35,21 @@
 public class DefaultHttpClientAttributesGetter
         implements HttpClientAttributesGetter<HttpClientRequest, HttpClientResponse> {
 
+    public DefaultHttpClientAttributesGetter() {
+        DeprecatedClassLogger.logWarning(getClass());
+    }
+
     @Nullable
     @Override
     public String getUrlFull(HttpClientRequest httpClientRequest) {
+        DeprecatedClassLogger.logWarning(getClass());
         return httpClientRequest.url();
     }
 
     @Nullable
     @Override
     public String getServerAddress(HttpClientRequest httpClientRequest) {
+        DeprecatedClassLogger.logWarning(getClass());
         try {
             URI uri = URI.create(httpClientRequest.url());
             return uri.getHost();
@@ -56,6 +62,7 @@ public String getServerAddress(HttpClientRequest httpClientRequest) {
     @Nullable
     @Override
     public Integer getServerPort(HttpClientRequest httpClientRequest) {
+        DeprecatedClassLogger.logWarning(getClass());
         try {
             URI uri = URI.create(httpClientRequest.url());
             return uri.getPort();
@@ -72,6 +79,7 @@ public Integer getServerPort(HttpClientRequest httpClientRequest) {
     @Nullable
     @Deprecated
     public String getUrl(HttpClientRequest httpClientRequest) {
+        DeprecatedClassLogger.logWarning(getClass());
         return this.getUrlFull(httpClientRequest);
     }
 
@@ -82,12 +90,14 @@ public String getUrl(HttpClientRequest httpClientRequest) {
     @Nullable
     @Deprecated
     public String getFlavor(HttpClientRequest httpClientRequest, @Nullable HttpClientResponse httpClientResponse) {
+        DeprecatedClassLogger.logWarning(getClass());
         return null;
     }
 
     @Nullable
     @Override
     public String getHttpRequestMethod(HttpClientRequest httpClientRequest) {
+        DeprecatedClassLogger.logWarning(getClass());
         return httpClientRequest.method();
     }
 
@@ -98,11 +108,13 @@ public String getHttpRequestMethod(HttpClientRequest httpClientRequest) {
     @Nullable
     @Deprecated
     public String getMethod(HttpClientRequest httpClientRequest) {
+        DeprecatedClassLogger.logWarning(getClass());
         return this.getHttpRequestMethod(httpClientRequest);
     }
 
     @Override
     public List<String> getHttpRequestHeader(HttpClientRequest httpClientRequest, String name) {
+        DeprecatedClassLogger.logWarning(getClass());
         if (httpClientRequest == null) {
             return Collections.emptyList();
         }
@@ -116,13 +128,15 @@ public List<String> getHttpRequestHeader(HttpClientRequest httpClientRequest, St
      */
     @Deprecated
     public List<String> getRequestHeader(HttpClientRequest httpClientRequest, String name) {
+        DeprecatedClassLogger.logWarning(getClass());
         return this.getHttpRequestHeader(httpClientRequest, name);
     }
 
     @Nullable
     @Override
     public Integer getHttpResponseStatusCode(HttpClientRequest httpClientRequest, HttpClientResponse httpClientResponse,
             @Nullable Throwable error) {
+        DeprecatedClassLogger.logWarning(getClass());
         if (httpClientResponse == null) {
             return null;
         }
@@ -138,12 +152,14 @@ public Integer getHttpResponseStatusCode(HttpClientRequest httpClientRequest, Ht
     @Deprecated
     public Integer getStatusCode(HttpClientRequest httpClientRequest, HttpClientResponse httpClientResponse,
             Throwable error) {
+        DeprecatedClassLogger.logWarning(getClass());
         return this.getHttpResponseStatusCode(httpClientRequest, httpClientResponse, error);
     }
 
     @Override
     public List<String> getHttpResponseHeader(HttpClientRequest httpClientRequest,
             HttpClientResponse httpClientResponse, String name) {
+        DeprecatedClassLogger.logWarning(getClass());
         if (httpClientResponse == null) {
             return Collections.emptyList();
         }
@@ -164,6 +180,7 @@ public List<String> getHttpResponseHeader(HttpClientRequest httpClientRequest,
     @Deprecated
     public List<String> getResponseHeader(HttpClientRequest httpClientRequest, HttpClientResponse httpClientResponse,
             String name) {
+        DeprecatedClassLogger.logWarning(getClass());
         return this.getHttpResponseHeader(httpClientRequest, httpClientResponse, name);
     }