/*
 * Copyright 2011 the original author or 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.
 */

import org.vertx.java.core.Handler;
import org.vertx.java.core.SimpleHandler;
import org.vertx.java.core.eventbus.EventBus;
import org.vertx.java.core.http.HttpClient;
import org.vertx.java.core.http.HttpClientResponse;
import org.vertx.java.deploy.Verticle;

public class PerfClient extends Verticle implements Handler<HttpClientResponse> {

  private HttpClient client;

  private long start;

  private int count = 0;

  // This determines the degree of pipelining
  private static final int CREDITS_BATCH = 2000;

  // Number of connections to create
  private static final int MAX_CONNS = 10;

  private int requestCredits = CREDITS_BATCH;

  private EventBus eb;

  public void handle(HttpClientResponse response) {
    if (response.statusCode != 200) {
      throw new IllegalStateException("Invalid response");
    }
    response.endHandler(new SimpleHandler() {
      public void handle() {
        count++;
        if (count % 2000 == 0) {
          eb.send("rate-counter", count);
          count = 0;
        }
        requestCredits++;
        makeRequest();
      }
    });
  }

  public void start() {
    eb = vertx.eventBus();
    client = vertx.createHttpClient().setPort(8080).setHost("localhost").setMaxPoolSize(MAX_CONNS);
    makeRequest();
  }

  private void makeRequest() {
    if (start == 0) {
      start = System.currentTimeMillis();
    }
    while (requestCredits > 0) {
      client.getNow("/", this);
      requestCredits--;
    }
  }

}
