io.scalecube.services.gateway.GatewayConfig Maven / Gradle / Ivy

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package io.scalecube.services.gateway;

import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.ExecutorService;

/**
 * Represents gateway configuration.
 */
public final class GatewayConfig {

  private final Class gatewayClass;

  private final Map options;

  private final int port;

  private final ExecutorService executorService;

  private GatewayConfig(Builder builder) {
    gatewayClass = builder.gatewayClass;
    port = builder.port;
    options = new HashMap<>(builder.options);
    executorService = builder.executorService;
  }

  /**
   * Gateway class.
   *
   * @return gateway class
   */
  public Class gatewayClass() {
    return gatewayClass;
  }

  /**
   * Gateway port.
   *
   * @return port number
   */
  public int port() {
    return port;
  }

  /**
   * Gateway executor service.
   *
   * @return executor service instance
   */
  public ExecutorService executorService() {
    return executorService;
  }

  /**
   * Returns value of configuration property for given key.
   *
   * @param key configuration property name
   * @return property value
   */
  public Optional get(String key) {
    return Optional.ofNullable(options.get(key));
  }

  public static Builder from(Builder other) {
    return new Builder(other);
  }

  public static Builder from(GatewayConfig config) {
    return new Builder(config);
  }

  public static Builder builder(Class gatewayClass) {
    return new Builder(gatewayClass);
  }

  @Override
  public String toString() {
    return "GatewayConfig{"
        + "gatewayClass="
        + gatewayClass
        + ", port="
        + port
        + ", executorService="
        + executorService
        + ", options="
        + options
        + '}';
  }

  public static class Builder {

    private final Class gatewayClass;

    private Map options = new HashMap<>();

    private int port = 0;

    private ExecutorService executorService;

    private Builder(Class gatewayClass) {
      this.gatewayClass = gatewayClass;
    }

    private Builder(Builder other) {
      this.gatewayClass = other.gatewayClass;
      this.options = new HashMap<>(other.options);
      this.port = other.port;
      this.executorService = other.executorService;
    }

    private Builder(GatewayConfig config) {
      this.gatewayClass = config.gatewayClass;
      this.options = new HashMap<>(config.options);
      this.port = config.port;
      this.executorService = config.executorService;
    }

    public Builder port(int port) {
      this.port = port;
      return this;
    }

    public Builder executorService(ExecutorService executorService) {
      this.executorService = executorService;
      return this;
    }

    public Builder addOption(String key, String value) {
      options.put(key, value);
      return this;
    }

    public Builder addOptions(Map options) {
      this.options.putAll(options);
      return this;
    }

    public GatewayConfig build() {
      return new GatewayConfig(this);
    }
  }
}