org.openqa.selenium.grid.sessionqueue.GetNextMatchingRequest Maven / Gradle / Ivy

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package org.openqa.selenium.grid.sessionqueue;

import org.openqa.selenium.Capabilities;
import org.openqa.selenium.grid.data.SessionRequest;
import org.openqa.selenium.internal.Require;
import org.openqa.selenium.json.TypeToken;
import org.openqa.selenium.remote.http.Contents;
import org.openqa.selenium.remote.http.HttpHandler;
import org.openqa.selenium.remote.http.HttpRequest;
import org.openqa.selenium.remote.http.HttpResponse;
import org.openqa.selenium.remote.tracing.Span;
import org.openqa.selenium.remote.tracing.Tracer;

import java.io.UncheckedIOException;
import java.lang.reflect.Type;
import java.util.Optional;
import java.util.Set;

import static java.util.Collections.singletonMap;
import static org.openqa.selenium.remote.tracing.HttpTracing.newSpanAsChildOf;
import static org.openqa.selenium.remote.tracing.Tags.HTTP_REQUEST;
import static org.openqa.selenium.remote.tracing.Tags.HTTP_RESPONSE;

class GetNextMatchingRequest implements HttpHandler {
  private static final Type SET_OF_CAPABILITIES = new TypeToken>() {}.getType();

  private final Tracer tracer;
  private final NewSessionQueue queue;

  public GetNextMatchingRequest(Tracer tracer, NewSessionQueue queue) {
    this.tracer = Require.nonNull("Tracer", tracer);
    this.queue = Require.nonNull("New session queue", queue);
  }

  @Override
  public HttpResponse execute(HttpRequest req) throws UncheckedIOException {
    try (Span span = newSpanAsChildOf(tracer, req, "sessionqueue.getrequest")) {
      HTTP_REQUEST.accept(span, req);
      Set stereotypes = Contents.fromJson(req, SET_OF_CAPABILITIES);

      Optional maybeRequest = queue.getNextAvailable(stereotypes);

      HttpResponse response =  new HttpResponse().setContent(Contents.asJson(singletonMap("value", maybeRequest.orElse(null))));

      HTTP_RESPONSE.accept(span, response);

      return response;
    }
  }
}