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/*
 * Copyright 2015, Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *    * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *
 *    * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 */

package org.glowroot.agent.shaded.grpc.inprocess;

import org.glowroot.agent.shaded.google.common.base.Preconditions;

import org.glowroot.agent.shaded.grpc.ExperimentalApi;
import org.glowroot.agent.shaded.grpc.internal.AbstractManagedChannelImplBuilder;
import org.glowroot.agent.shaded.grpc.internal.AbstractReferenceCounted;
import org.glowroot.agent.shaded.grpc.internal.ClientTransport;
import org.glowroot.agent.shaded.grpc.internal.ClientTransportFactory;

/**
 * Builder for a channel that issues in-process requests. Clients identify the in-process server by
 * its name.
 *
 * The channel is intended to be fully-featured, high performance, and useful in testing.
 */
@ExperimentalApi("There is no plan to make this API stable.")
public class InProcessChannelBuilder extends
        AbstractManagedChannelImplBuilder {
  /**
   * Create a channel builder that will connect to the server with the given name.
   *
   * @param name the identity of the server to connect to
   * @return a new builder
   */
  public static InProcessChannelBuilder forName(String name) {
    return new InProcessChannelBuilder(name);
  }

  private final String name;
  private String authority = "localhost";

  private InProcessChannelBuilder(String name) {
    this.name = Preconditions.checkNotNull(name);
  }

  /**
   * Does nothing.
   */
  @Override
  public InProcessChannelBuilder usePlaintext(boolean skipNegotiation) {
    return this;
  }

  @Override
  public InProcessChannelBuilder overrideAuthority(String authority) {
    this.authority = authority;
    return this;
  }

  @Override
  protected ClientTransportFactory buildTransportFactory() {
    return new InProcessClientTransportFactory(name, authority);
  }

  private static class InProcessClientTransportFactory extends AbstractReferenceCounted
          implements ClientTransportFactory {
    private final String name;
    private final String authority;

    private InProcessClientTransportFactory(String name, String authority) {
      this.name = name;
      this.authority = authority;
    }

    @Override
    public ClientTransport newClientTransport() {
      return new InProcessTransport(name);
    }

    @Override
    public String authority() {
      return authority;
    }

    @Override
    protected void deallocate() {
      // Do nothing.
    }
  }
}