| /* |
| * Copyright 2009-2010 by The Regents of the University of California |
| * 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 from |
| * |
| * 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 edu.uci.ics.hyracks.api.job.profiling.counters; |
| |
| public interface ICounter { |
| /** |
| * Get the fully-qualified name of the counter. |
| * |
| * @return Name of the counter. |
| */ |
| public String getName(); |
| |
| /** |
| * Update the value of the counter to be current + delta. |
| * |
| * @param delta |
| * - Amount to change the counter value by. |
| * @return the new value after update. |
| */ |
| public long update(long delta); |
| |
| /** |
| * Set the value of the counter. |
| * |
| * @param value |
| * - New value of the counter. |
| * @return Old value of the counter. |
| */ |
| public long set(long value); |
| |
| /** |
| * Get the value of the counter. |
| * |
| * @return the value of the counter. |
| */ |
| public long get(); |
| } |