#20227

Committed 27 Mar 2026 03:13PM UTC coverage: 88.702% (-0.005%) from 88.707%

Build # #20227

Build Type

push

github

Committed by

web-flow

Commit Message

Add custom label for per-RPC metrics

Implements gRFC A108.

https://github.com/grpc/proposal/blob/master/A108-otel-custom-per-call-label.md

Run Details

35518 of 40042 relevant lines covered (88.7%)

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85.71

/../api/src/main/java/io/grpc/Grpc.java

/*
 * Copyright 2016 The gRPC 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
 *
 *     http://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.grpc;

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.net.SocketAddress;
import java.net.URI;
import java.net.URISyntaxException;
import javax.net.ssl.SSLSession;

/**
 * Stuff that are part of the public API but are not bound to particular classes, e.g., static
 * methods, constants, attribute and context keys.
 */
public final class Grpc {
  private Grpc() {
  }

  /**
   * Attribute key for the remote address of a transport.
   */
  @ExperimentalApi("https://github.com/grpc/grpc-java/issues/1710")
  @TransportAttr
  public static final Attributes.Key<SocketAddress> TRANSPORT_ATTR_REMOTE_ADDR =
      Attributes.Key.create("io.grpc.Grpc.TRANSPORT_ATTR_REMOTE_ADDR");

  /**
   * Attribute key for the local address of a transport.
   */
  @ExperimentalApi("https://github.com/grpc/grpc-java/issues/1710")
  @TransportAttr
  public static final Attributes.Key<SocketAddress> TRANSPORT_ATTR_LOCAL_ADDR =
      Attributes.Key.create("io.grpc.Grpc.TRANSPORT_ATTR_LOCAL_ADDR");

  /**
   * Attribute key for SSL session of a transport.
   */
  @ExperimentalApi("https://github.com/grpc/grpc-java/issues/1710")
  @TransportAttr
  public static final Attributes.Key<SSLSession> TRANSPORT_ATTR_SSL_SESSION =
      Attributes.Key.create("io.grpc.Grpc.TRANSPORT_ATTR_SSL_SESSION");

  /**
   * The value for the custom label of per-RPC metrics. Defaults to empty string when unset. Must
   * not be set to {@code null}.
   */
  public static final CallOptions.Key<String> CALL_OPTION_CUSTOM_LABEL =
      CallOptions.Key.createWithDefault("io.grpc.Grpc.CALL_OPTION_CUSTOM_LABEL", "");

  /**
   * Annotation for transport attributes. It follows the annotation semantics defined
   * by {@link Attributes}.
   */
  @ExperimentalApi("https://github.com/grpc/grpc-java/issues/4972")
  @Retention(RetentionPolicy.SOURCE)
  @Documented
  public @interface TransportAttr {}

  /**
   * Creates a channel builder with a target string and credentials. The target can be either a
   * valid {@link NameResolver}-compliant URI, or an authority string.
   *
   * <p>A {@code NameResolver}-compliant URI is an absolute hierarchical URI as defined by {@link
   * java.net.URI}. Example URIs:
   * <ul>
   *   <li>{@code "dns:///foo.googleapis.com:8080"}</li>
   *   <li>{@code "dns:///foo.googleapis.com"}</li>
   *   <li>{@code "dns:///%5B2001:db8:85a3:8d3:1319:8a2e:370:7348%5D:443"}</li>
   *   <li>{@code "dns://8.8.8.8/foo.googleapis.com:8080"}</li>
   *   <li>{@code "dns://8.8.8.8/foo.googleapis.com"}</li>
   *   <li>{@code "zookeeper://zk.example.com:9900/example_service"}</li>
   * </ul>
   *
   * <p>An authority string will be converted to a {@code NameResolver}-compliant URI, which has
   * the scheme from the name resolver with the highest priority (e.g. {@code "dns"}),
   * no authority, and the original authority string as its path after properly escaped.
   * We recommend libraries to specify the schema explicitly if it is known, since libraries cannot
   * know which NameResolver will be default during runtime.
   * Example authority strings:
   * <ul>
   *   <li>{@code "localhost"}</li>
   *   <li>{@code "127.0.0.1"}</li>
   *   <li>{@code "localhost:8080"}</li>
   *   <li>{@code "foo.googleapis.com:8080"}</li>
   *   <li>{@code "127.0.0.1:8080"}</li>
   *   <li>{@code "[2001:db8:85a3:8d3:1319:8a2e:370:7348]"}</li>
   *   <li>{@code "[2001:db8:85a3:8d3:1319:8a2e:370:7348]:443"}</li>
   * </ul>
   */
  public static ManagedChannelBuilder<?> newChannelBuilder(
      String target, ChannelCredentials creds) {
    return ManagedChannelRegistry.getDefaultRegistry().newChannelBuilder(target, creds);
  }

  /**
   * Creates a channel builder from a host, port, and credentials. The host and port are combined to
   * form an authority string and then passed to {@link #newChannelBuilder(String,
   * ChannelCredentials)}. IPv6 addresses are properly surrounded by square brackets ("[]").
   */
  public static ManagedChannelBuilder<?> newChannelBuilderForAddress(
      String host, int port, ChannelCredentials creds) {
    return newChannelBuilder(authorityFromHostAndPort(host, port), creds);
  }

  /**
   * Combine a host and port into an authority string.
   */
  // A copy of GrpcUtil.authorityFromHostAndPort
  private static String authorityFromHostAndPort(String host, int port) {
    try {
      return new URI(null, null, host, port, null, null, null).getAuthority();
    } catch (URISyntaxException ex) {
      throw new IllegalArgumentException("Invalid host or port: " + host + " " + port, ex);
    }
  }

  /**
   * Static factory for creating a new ServerBuilder.
   *
   * @param port the port to listen on
   * @param creds the server identity
   */
  public static ServerBuilder<?> newServerBuilderForPort(int port, ServerCredentials creds) {
    return ServerRegistry.getDefaultRegistry().newServerBuilderForPort(port, creds);
  }
}

1	/*
2	* Copyright 2016 The gRPC Authors
3	*
4	* Licensed under the Apache License, Version 2.0 (the "License");
5	* you may not use this file except in compliance with the License.
6	* You may obtain a copy of the License at
7	*
8	* http://www.apache.org/licenses/LICENSE-2.0
9	*
10	* Unless required by applicable law or agreed to in writing, software
11	* distributed under the License is distributed on an "AS IS" BASIS,
12	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13	* See the License for the specific language governing permissions and
14	* limitations under the License.
15	*/
16
17	package io.grpc;
18
19	import java.lang.annotation.Documented;
20	import java.lang.annotation.Retention;
21	import java.lang.annotation.RetentionPolicy;
22	import java.net.SocketAddress;
23	import java.net.URI;
24	import java.net.URISyntaxException;
25	import javax.net.ssl.SSLSession;
26
27	/**
28	* Stuff that are part of the public API but are not bound to particular classes, e.g., static
29	* methods, constants, attribute and context keys.
30	*/
31	public final class Grpc {
32	private Grpc() {
33	}
34
35	/**
36	* Attribute key for the remote address of a transport.
37	*/
38	@ExperimentalApi("https://github.com/grpc/grpc-java/issues/1710")
39	@TransportAttr
40	public static final Attributes.Key<SocketAddress> TRANSPORT_ATTR_REMOTE_ADDR =	1✔
41	Attributes.Key.create("io.grpc.Grpc.TRANSPORT_ATTR_REMOTE_ADDR");	1✔
42
43	/**
44	* Attribute key for the local address of a transport.
45	*/
46	@ExperimentalApi("https://github.com/grpc/grpc-java/issues/1710")
47	@TransportAttr
48	public static final Attributes.Key<SocketAddress> TRANSPORT_ATTR_LOCAL_ADDR =	1✔
49	Attributes.Key.create("io.grpc.Grpc.TRANSPORT_ATTR_LOCAL_ADDR");	1✔
50
51	/**
52	* Attribute key for SSL session of a transport.
53	*/
54	@ExperimentalApi("https://github.com/grpc/grpc-java/issues/1710")
55	@TransportAttr
56	public static final Attributes.Key<SSLSession> TRANSPORT_ATTR_SSL_SESSION =	1✔
57	Attributes.Key.create("io.grpc.Grpc.TRANSPORT_ATTR_SSL_SESSION");	1✔
58
59	/**
60	* The value for the custom label of per-RPC metrics. Defaults to empty string when unset. Must
61	* not be set to {@code null}.
62	*/
63	public static final CallOptions.Key<String> CALL_OPTION_CUSTOM_LABEL =	1✔
64	CallOptions.Key.createWithDefault("io.grpc.Grpc.CALL_OPTION_CUSTOM_LABEL", "");	1✔
65
66	/**
67	* Annotation for transport attributes. It follows the annotation semantics defined
68	* by {@link Attributes}.
69	*/
70	@ExperimentalApi("https://github.com/grpc/grpc-java/issues/4972")
71	@Retention(RetentionPolicy.SOURCE)
72	@Documented
73	public @interface TransportAttr {}
74
75	/**
76	* Creates a channel builder with a target string and credentials. The target can be either a
77	* valid {@link NameResolver}-compliant URI, or an authority string.
78	*
79	* <p>A {@code NameResolver}-compliant URI is an absolute hierarchical URI as defined by {@link
80	* java.net.URI}. Example URIs:
81	* <ul>
82	* <li>{@code "dns:///foo.googleapis.com:8080"}</li>
83	* <li>{@code "dns:///foo.googleapis.com"}</li>
84	* <li>{@code "dns:///%5B2001:db8:85a3:8d3:1319:8a2e:370:7348%5D:443"}</li>
85	* <li>{@code "dns://8.8.8.8/foo.googleapis.com:8080"}</li>
86	* <li>{@code "dns://8.8.8.8/foo.googleapis.com"}</li>
87	* <li>{@code "zookeeper://zk.example.com:9900/example_service"}</li>
88	* </ul>
89	*
90	* <p>An authority string will be converted to a {@code NameResolver}-compliant URI, which has
91	* the scheme from the name resolver with the highest priority (e.g. {@code "dns"}),
92	* no authority, and the original authority string as its path after properly escaped.
93	* We recommend libraries to specify the schema explicitly if it is known, since libraries cannot
94	* know which NameResolver will be default during runtime.
95	* Example authority strings:
96	* <ul>
97	* <li>{@code "localhost"}</li>
98	* <li>{@code "127.0.0.1"}</li>
99	* <li>{@code "localhost:8080"}</li>
100	* <li>{@code "foo.googleapis.com:8080"}</li>
101	* <li>{@code "127.0.0.1:8080"}</li>
102	* <li>{@code "[2001:db8:85a3:8d3:1319:8a2e:370:7348]"}</li>
103	* <li>{@code "[2001:db8:85a3:8d3:1319:8a2e:370:7348]:443"}</li>
104	* </ul>
105	*/
106	public static ManagedChannelBuilder<?> newChannelBuilder(
107	String target, ChannelCredentials creds) {
108	return ManagedChannelRegistry.getDefaultRegistry().newChannelBuilder(target, creds);	1✔
109	}
110
111	/**
112	* Creates a channel builder from a host, port, and credentials. The host and port are combined to
113	* form an authority string and then passed to {@link #newChannelBuilder(String,
114	* ChannelCredentials)}. IPv6 addresses are properly surrounded by square brackets ("[]").
115	*/
116	public static ManagedChannelBuilder<?> newChannelBuilderForAddress(
117	String host, int port, ChannelCredentials creds) {
118	return newChannelBuilder(authorityFromHostAndPort(host, port), creds);	1✔
119	}
120
121	/**
122	* Combine a host and port into an authority string.
123	*/
124	// A copy of GrpcUtil.authorityFromHostAndPort
125	private static String authorityFromHostAndPort(String host, int port) {
126	try {
127	return new URI(null, null, host, port, null, null, null).getAuthority();	1✔
128	} catch (URISyntaxException ex) {	×
129	throw new IllegalArgumentException("Invalid host or port: " + host + " " + port, ex);	×
130	}
131	}
132
133	/**
134	* Static factory for creating a new ServerBuilder.
135	*
136	* @param port the port to listen on
137	* @param creds the server identity
138	*/
139	public static ServerBuilder<?> newServerBuilderForPort(int port, ServerCredentials creds) {
140	return ServerRegistry.getDefaultRegistry().newServerBuilderForPort(port, creds);	1✔
141	}
142	}

grpc / grpc-java / #20227

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