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/*
 * 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 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 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 TRANSPORT_ATTR_SSL_SESSION =
      Attributes.Key.create("io.grpc.Grpc.TRANSPORT_ATTR_SSL_SESSION");

  /**
   * 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.
   *
   * 

A {@code NameResolver}-compliant URI is an absolute hierarchical URI as defined by {@link * java.net.URI}. Example URIs: *

    *
  • {@code "dns:///foo.googleapis.com:8080"}
  • *
  • {@code "dns:///foo.googleapis.com"}
  • *
  • {@code "dns:///%5B2001:db8:85a3:8d3:1319:8a2e:370:7348%5D:443"}
  • *
  • {@code "dns://8.8.8.8/foo.googleapis.com:8080"}
  • *
  • {@code "dns://8.8.8.8/foo.googleapis.com"}
  • *
  • {@code "zookeeper://zk.example.com:9900/example_service"}
  • *
* *

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: *

    *
  • {@code "localhost"}
  • *
  • {@code "127.0.0.1"}
  • *
  • {@code "localhost:8080"}
  • *
  • {@code "foo.googleapis.com:8080"}
  • *
  • {@code "127.0.0.1:8080"}
  • *
  • {@code "[2001:db8:85a3:8d3:1319:8a2e:370:7348]"}
  • *
  • {@code "[2001:db8:85a3:8d3:1319:8a2e:370:7348]:443"}
  • *
*/ 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); } }




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