Make net.transport an optional attribute

instrumentation-api-semconv/src/main/java/io/opentelemetry/instrumentation/api/instrumenter/net/NetClientAttributesGetter.java

@@ -18,7 +18,9 @@
 public interface NetClientAttributesGetter<REQUEST, RESPONSE> {
 
   @Nullable
-  String getTransport(REQUEST request, @Nullable RESPONSE response);
+  default String getTransport(REQUEST request, @Nullable RESPONSE response) {
+    return null;
+  }
 
   /**
    * Returns the application protocol used.

instrumentation-api-semconv/src/main/java/io/opentelemetry/instrumentation/api/instrumenter/net/NetServerAttributesGetter.java

@@ -18,7 +18,9 @@
 public interface NetServerAttributesGetter<REQUEST> {
 
   @Nullable
-  String getTransport(REQUEST request);
+  default String getTransport(REQUEST request) {
+    return null;
+  }
 
   /**
    * Returns the application protocol used.

instrumentation-api-semconv/src/test/java/io/opentelemetry/instrumentation/api/instrumenter/http/HttpClientAttributesExtractorTest.java

@@ -6,7 +6,6 @@
 package io.opentelemetry.instrumentation.api.instrumenter.http;
 
 import static io.opentelemetry.sdk.testing.assertj.OpenTelemetryAssertions.assertThat;
-import static io.opentelemetry.semconv.trace.attributes.SemanticAttributes.NetTransportValues.IP_TCP;
 import static java.util.Arrays.asList;
 import static java.util.Collections.emptyList;
 import static java.util.Collections.singletonList;
@@ -72,13 +71,6 @@ public List<String> getResponseHeader(
   static class TestNetClientAttributesGetter
       implements NetClientAttributesGetter<Map<String, String>, Map<String, String>> {
 
-    @Nullable
-    @Override
-    public String getTransport(
-        Map<String, String> request, @Nullable Map<String, String> response) {
-      return response == null ? null : response.get("transport");
-    }
-
     @Nullable
     @Override
     public String getProtocolName(
@@ -124,7 +116,6 @@ void normal() {
     response.put("statusCode", "202");
     response.put("header.content-length", "20");
     response.put("header.custom-response-header", "654,321");
-    response.put("transport", IP_TCP);
 
     ToIntFunction<Context> resendCountFromContext = context -> 2;
 
@@ -160,7 +151,6 @@ void normal() {
             entry(
                 AttributeKey.stringArrayKey("http.response.header.custom_response_header"),
                 asList("654", "321")),
-            entry(SemanticAttributes.NET_TRANSPORT, IP_TCP),
             entry(NetAttributes.NET_PROTOCOL_NAME, "http"),
             entry(NetAttributes.NET_PROTOCOL_VERSION, "1.1"));
   }

instrumentation-api-semconv/src/test/java/io/opentelemetry/instrumentation/api/instrumenter/http/HttpServerAttributesExtractorTest.java

@@ -81,11 +81,6 @@ public List<String> getResponseHeader(
 
   static class TestNetServerAttributesGetter
       implements NetServerAttributesGetter<Map<String, Object>> {
-    @Nullable
-    @Override
-    public String getTransport(Map<String, Object> request) {
-      return (String) request.get("transport");
-    }
 
     @Nullable
     @Override

instrumentation-api-semconv/src/test/java/io/opentelemetry/instrumentation/api/instrumenter/net/InetSocketAddressNetClientAttributesGetterTest.java

@@ -6,7 +6,6 @@
 package io.opentelemetry.instrumentation.api.instrumenter.net;
 
 import static io.opentelemetry.sdk.testing.assertj.OpenTelemetryAssertions.assertThat;
-import static org.assertj.core.api.Assertions.entry;
 
 import io.opentelemetry.api.common.Attributes;
 import io.opentelemetry.api.common.AttributesBuilder;
@@ -25,10 +24,6 @@ class InetSocketAddressNetClientAttributesGetterTest {
   private final InetSocketAddressNetClientAttributesGetter<InetSocketAddress, InetSocketAddress>
       getter =
           new InetSocketAddressNetClientAttributesGetter<InetSocketAddress, InetSocketAddress>() {
-            @Override
-            public String getTransport(InetSocketAddress request, InetSocketAddress response) {
-              return SemanticAttributes.NetTransportValues.IP_TCP;
-            }
 
             @Override
             public String getPeerName(InetSocketAddress request) {
@@ -56,9 +51,7 @@ void noInetSocketAddress() {
 
     AttributesBuilder attributes = Attributes.builder();
     extractor.onEnd(attributes, Context.root(), null, null, null);
-    assertThat(attributes.build())
-        .containsOnly(
-            entry(SemanticAttributes.NET_TRANSPORT, SemanticAttributes.NetTransportValues.IP_TCP));
+    assertThat(attributes.build()).isEmpty();
   }
 
   @Test
@@ -82,7 +75,6 @@ void fullAddress() {
     assertThat(startAttributes.build()).isEmpty();
 
     AttributesBuilder builder = Attributes.builder();
-    builder.put(SemanticAttributes.NET_TRANSPORT, SemanticAttributes.NetTransportValues.IP_TCP);
     builder.put(SemanticAttributes.NET_SOCK_PEER_ADDR, address.getAddress().getHostAddress());
     if (!ipv4) {
       builder.put(SemanticAttributes.NET_SOCK_FAMILY, "inet6");
@@ -111,8 +103,6 @@ void unresolved() {
     // then
     assertThat(startAttributes.build()).isEmpty();
 
-    assertThat(endAttributes.build())
-        .containsOnly(
-            entry(SemanticAttributes.NET_TRANSPORT, SemanticAttributes.NetTransportValues.IP_TCP));
+    assertThat(endAttributes.build()).isEmpty();
   }
 }

instrumentation-api-semconv/src/test/java/io/opentelemetry/instrumentation/api/instrumenter/net/InetSocketAddressNetServerAttributesGetterTest.java

@@ -6,7 +6,6 @@
 package io.opentelemetry.instrumentation.api.instrumenter.net;
 
 import static io.opentelemetry.sdk.testing.assertj.OpenTelemetryAssertions.assertThat;
-import static org.assertj.core.api.Assertions.entry;
 
 import io.opentelemetry.api.common.Attributes;
 import io.opentelemetry.api.common.AttributesBuilder;
@@ -25,11 +24,6 @@ class InetSocketAddressNetServerAttributesGetterTest {
   final InetSocketAddressNetServerAttributesGetter<Addresses> getter =
       new InetSocketAddressNetServerAttributesGetter<Addresses>() {
 
-        @Override
-        public String getTransport(Addresses request) {
-          return SemanticAttributes.NetTransportValues.IP_TCP;
-        }
-
         @Override
         public String getHostName(Addresses request) {
           // net.host.name and net.host.port are tested in NetClientAttributesExtractorTest
@@ -59,9 +53,7 @@ protected InetSocketAddress getHostSocketAddress(Addresses request) {
   void noInetSocketAddress() {
     AttributesBuilder attributes = Attributes.builder();
     extractor.onStart(attributes, Context.root(), new Addresses(null, null));
-    assertThat(attributes.build())
-        .containsOnly(
-            entry(SemanticAttributes.NET_TRANSPORT, SemanticAttributes.NetTransportValues.IP_TCP));
+    assertThat(attributes.build()).isEmpty();
   }
 
   @Test
@@ -84,7 +76,6 @@ void fullAddress() {
 
     // then
     AttributesBuilder builder = Attributes.builder();
-    builder.put(SemanticAttributes.NET_TRANSPORT, SemanticAttributes.NetTransportValues.IP_TCP);
     if (!request.isIpv4()) {
       builder.put(SemanticAttributes.NET_SOCK_FAMILY, "inet6");
     }
@@ -118,9 +109,7 @@ void unresolved() {
     extractor.onEnd(endAttributes, context, request, request, null);
 
     // then
-    assertThat(startAttributes.build())
-        .containsOnly(
-            entry(SemanticAttributes.NET_TRANSPORT, SemanticAttributes.NetTransportValues.IP_TCP));
+    assertThat(startAttributes.build()).isEmpty();
 
     assertThat(endAttributes.build()).isEmpty();
   }

instrumentation-api/src/jmh/java/io/opentelemetry/instrumentation/api/instrumenter/InstrumenterBenchmark.java

@@ -11,7 +11,6 @@
 import io.opentelemetry.instrumentation.api.instrumenter.http.HttpClientAttributesGetter;
 import io.opentelemetry.instrumentation.api.instrumenter.http.HttpSpanNameExtractor;
 import io.opentelemetry.instrumentation.api.instrumenter.net.InetSocketAddressNetClientAttributesGetter;
-import io.opentelemetry.semconv.trace.attributes.SemanticAttributes;
 import java.net.InetSocketAddress;
 import java.util.Collections;
 import java.util.List;
@@ -95,12 +94,6 @@ static class ConstantNetAttributesGetter
     private static final InetSocketAddress PEER_ADDRESS =
         InetSocketAddress.createUnresolved("localhost", 8080);
 
-    @Nullable
-    @Override
-    public String getTransport(Void request, @Nullable Void response) {
-      return SemanticAttributes.NetTransportValues.IP_TCP;
-    }
-
     @Nullable
     @Override
     public String getProtocolName(Void unused, @Nullable Void unused2) {

instrumentation/akka/akka-http-10.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/akkahttp/client/AkkaHttpNetAttributesGetter.java

@@ -9,16 +9,10 @@
 import akka.http.scaladsl.model.HttpResponse;
 import io.opentelemetry.instrumentation.api.instrumenter.net.NetClientAttributesGetter;
 import io.opentelemetry.javaagent.instrumentation.akkahttp.AkkaHttpUtil;
-import io.opentelemetry.semconv.trace.attributes.SemanticAttributes;
 import javax.annotation.Nullable;
 
 class AkkaHttpNetAttributesGetter implements NetClientAttributesGetter<HttpRequest, HttpResponse> {
 
-  @Override
-  public String getTransport(HttpRequest httpRequest, @Nullable HttpResponse httpResponse) {
-    return SemanticAttributes.NetTransportValues.IP_TCP;
-  }
-
   @Nullable
   @Override
   public String getProtocolName(HttpRequest httpRequest, @Nullable HttpResponse httpResponse) {

instrumentation/akka/akka-http-10.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/akkahttp/server/AkkaNetServerAttributesGetter.java

@@ -13,12 +13,6 @@
 // TODO (trask) capture net attributes?
 class AkkaNetServerAttributesGetter implements NetServerAttributesGetter<HttpRequest> {
 
-  @Nullable
-  @Override
-  public String getTransport(HttpRequest request) {
-    return null;
-  }
-
   @Nullable
   @Override
   public String getProtocolName(HttpRequest request) {

instrumentation/apache-dubbo-2.7/library-autoconfigure/src/main/java/io/opentelemetry/instrumentation/apachedubbo/v2_7/internal/DubboNetClientAttributesGetter.java

@@ -18,12 +18,6 @@
 public final class DubboNetClientAttributesGetter
     extends InetSocketAddressNetClientAttributesGetter<DubboRequest, Result> {
 
-  @Override
-  @Nullable
-  public String getTransport(DubboRequest request, @Nullable Result response) {
-    return null;
-  }
-
   @Nullable
   @Override
   public String getPeerName(DubboRequest request) {

instrumentation/apache-dubbo-2.7/library-autoconfigure/src/main/java/io/opentelemetry/instrumentation/apachedubbo/v2_7/internal/DubboNetServerAttributesGetter.java

@@ -17,12 +17,6 @@
 public final class DubboNetServerAttributesGetter
     extends InetSocketAddressNetServerAttributesGetter<DubboRequest> {
 
-  @Override
-  @Nullable
-  public String getTransport(DubboRequest request) {
-    return null;
-  }
-
   @Nullable
   @Override
   public String getHostName(DubboRequest request) {

instrumentation/apache-httpasyncclient-4.1/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/apachehttpasyncclient/ApacheHttpAsyncClientNetAttributesGetter.java

@@ -6,19 +6,13 @@
 package io.opentelemetry.javaagent.instrumentation.apachehttpasyncclient;
 
 import io.opentelemetry.instrumentation.api.instrumenter.net.InetSocketAddressNetClientAttributesGetter;
-import io.opentelemetry.semconv.trace.attributes.SemanticAttributes;
 import java.net.InetSocketAddress;
 import javax.annotation.Nullable;
 import org.apache.http.HttpResponse;
 
 final class ApacheHttpAsyncClientNetAttributesGetter
     extends InetSocketAddressNetClientAttributesGetter<ApacheHttpClientRequest, HttpResponse> {
 
-  @Override
-  public String getTransport(ApacheHttpClientRequest request, @Nullable HttpResponse response) {
-    return SemanticAttributes.NetTransportValues.IP_TCP;
-  }
-
   @Override
   public String getProtocolName(ApacheHttpClientRequest request, @Nullable HttpResponse response) {
     return request.getProtocolName();

instrumentation/apache-httpclient/apache-httpclient-2.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/apachehttpclient/v2_0/ApacheHttpClientNetAttributesGetter.java

@@ -6,7 +6,6 @@
 package io.opentelemetry.javaagent.instrumentation.apachehttpclient.v2_0;
 
 import io.opentelemetry.instrumentation.api.instrumenter.net.NetClientAttributesGetter;
-import io.opentelemetry.semconv.trace.attributes.SemanticAttributes;
 import javax.annotation.Nullable;
 import org.apache.commons.httpclient.HostConfiguration;
 import org.apache.commons.httpclient.HttpMethod;
@@ -15,11 +14,6 @@
 final class ApacheHttpClientNetAttributesGetter
     implements NetClientAttributesGetter<HttpMethod, HttpMethod> {
 
-  @Override
-  public String getTransport(HttpMethod request, @Nullable HttpMethod response) {
-    return SemanticAttributes.NetTransportValues.IP_TCP;
-  }
-
   @Override
   public String getProtocolName(HttpMethod request, @Nullable HttpMethod response) {
     return "http";

instrumentation/apache-httpclient/apache-httpclient-4.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/apachehttpclient/v4_0/ApacheHttpClientNetAttributesGetter.java

@@ -6,18 +6,12 @@
 package io.opentelemetry.javaagent.instrumentation.apachehttpclient.v4_0;
 
 import io.opentelemetry.instrumentation.api.instrumenter.net.NetClientAttributesGetter;
-import io.opentelemetry.semconv.trace.attributes.SemanticAttributes;
 import javax.annotation.Nullable;
 import org.apache.http.HttpResponse;
 
 final class ApacheHttpClientNetAttributesGetter
     implements NetClientAttributesGetter<ApacheHttpClientRequest, HttpResponse> {
 
-  @Override
-  public String getTransport(ApacheHttpClientRequest request, @Nullable HttpResponse response) {
-    return SemanticAttributes.NetTransportValues.IP_TCP;
-  }
-
   @Override
   public String getProtocolName(ApacheHttpClientRequest request, @Nullable HttpResponse response) {
     return request.getProtocolName();

instrumentation/apache-httpclient/apache-httpclient-4.3/library/src/main/java/io/opentelemetry/instrumentation/apachehttpclient/v4_3/ApacheHttpClientNetAttributesGetter.java

@@ -6,19 +6,13 @@
 package io.opentelemetry.instrumentation.apachehttpclient.v4_3;
 
 import io.opentelemetry.instrumentation.api.instrumenter.net.InetSocketAddressNetClientAttributesGetter;
-import io.opentelemetry.semconv.trace.attributes.SemanticAttributes;
 import java.net.InetSocketAddress;
 import javax.annotation.Nullable;
 import org.apache.http.HttpResponse;
 
 final class ApacheHttpClientNetAttributesGetter
     extends InetSocketAddressNetClientAttributesGetter<ApacheHttpClientRequest, HttpResponse> {
 
-  @Override
-  public String getTransport(ApacheHttpClientRequest request, @Nullable HttpResponse response) {
-    return SemanticAttributes.NetTransportValues.IP_TCP;
-  }
-
   @Override
   public String getProtocolName(ApacheHttpClientRequest request, @Nullable HttpResponse response) {
     return request.getProtocolName();

instrumentation/apache-httpclient/apache-httpclient-5.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/apachehttpclient/v5_0/ApacheHttpClientNetAttributesGetter.java

@@ -6,7 +6,6 @@
 package io.opentelemetry.javaagent.instrumentation.apachehttpclient.v5_0;
 
 import io.opentelemetry.instrumentation.api.instrumenter.net.NetClientAttributesGetter;
-import io.opentelemetry.semconv.trace.attributes.SemanticAttributes;
 import javax.annotation.Nullable;
 import org.apache.hc.core5.http.HttpRequest;
 import org.apache.hc.core5.http.HttpResponse;
@@ -15,11 +14,6 @@
 final class ApacheHttpClientNetAttributesGetter
     implements NetClientAttributesGetter<HttpRequest, HttpResponse> {
 
-  @Override
-  public String getTransport(HttpRequest request, @Nullable HttpResponse response) {
-    return SemanticAttributes.NetTransportValues.IP_TCP;
-  }
-
   @Nullable
   @Override
   public String getProtocolName(HttpRequest request, @Nullable HttpResponse response) {

instrumentation/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/ArmeriaNetServerAttributesGetter.java

@@ -8,19 +8,13 @@
 import com.linecorp.armeria.common.RequestContext;
 import com.linecorp.armeria.common.SessionProtocol;
 import io.opentelemetry.instrumentation.api.instrumenter.net.InetSocketAddressNetServerAttributesGetter;
-import io.opentelemetry.semconv.trace.attributes.SemanticAttributes;
 import java.net.InetSocketAddress;
 import java.net.SocketAddress;
 import javax.annotation.Nullable;
 
 final class ArmeriaNetServerAttributesGetter
     extends InetSocketAddressNetServerAttributesGetter<RequestContext> {
 
-  @Override
-  public String getTransport(RequestContext ctx) {
-    return SemanticAttributes.NetTransportValues.IP_TCP;
-  }
-
   @Override
   public String getProtocolName(RequestContext ctx) {
     return "http";

instrumentation/armeria-1.3/library/src/main/java/io/opentelemetry/instrumentation/armeria/v1_3/internal/ArmeriaNetClientAttributesGetter.java

@@ -10,7 +10,6 @@
 import com.linecorp.armeria.common.SessionProtocol;
 import com.linecorp.armeria.common.logging.RequestLog;
 import io.opentelemetry.instrumentation.api.instrumenter.net.InetSocketAddressNetClientAttributesGetter;
-import io.opentelemetry.semconv.trace.attributes.SemanticAttributes;
 import java.net.InetSocketAddress;
 import java.net.SocketAddress;
 import javax.annotation.Nullable;
@@ -22,11 +21,6 @@
 public final class ArmeriaNetClientAttributesGetter
     extends InetSocketAddressNetClientAttributesGetter<RequestContext, RequestLog> {
 
-  @Override
-  public String getTransport(RequestContext ctx, @Nullable RequestLog requestLog) {
-    return SemanticAttributes.NetTransportValues.IP_TCP;
-  }
-
   @Override
   public String getProtocolName(RequestContext ctx, @Nullable RequestLog requestLog) {
     return "http";