/
SpanStorage.java
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/
SpanStorage.java
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/**
* 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.avro.ipc.trace;
import java.util.List;
/**
* Responsible for storing spans locally and answering span queries.
*
* Since query for a given set of spans may persist over several RPC
* calls, they are indexed by a handle.
*
*/
public interface SpanStorage {
public static final long DEFAULT_MAX_SPANS = 10000L;
public final static long MILLIS_PER_SECOND = 1000L;
public final static long NANOS_PER_SECOND = 1000000000L;
/**
* Add a span.
* @param s
*/
void addSpan(Span s);
/**
* Set the maximum number of spans to have in storage at any given time.
*/
void setMaxSpans(long maxSpans);
/**
* Return a list of all spans currently stored. For testing.
*/
List<Span> getAllSpans();
/**
* Return a list of all spans that fall within the time given range.
* @param start UNIX time (in nanoseconds) as a long
* @param end UNIX time (in nanoseconds) as a long
*/
List<Span> getSpansInRange(long start, long end);
}