/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.htrace.core;

import java.io.IOException;
import java.util.Collection;
import java.util.HashSet;

/**
 * SpanReceiver for testing only that just collects the Span objects it
 * receives. The spans it receives can be accessed with getSpans();
 */
public class POJOSpanReceiver extends SpanReceiver {
  private final Collection<Span> spans;

  public POJOSpanReceiver(HTraceConfiguration conf) {
    this.spans = new HashSet<Span>();
  }

  /**
   * @return The spans this POJOSpanReceiver has received.
   */
  public Collection<Span> getSpans() {
    return spans;
  }

  @Override
  public void close() throws IOException {
  }

  @Override
  public void receiveSpan(Span span) {
    spans.add(span);
  }
}