1 /*
2 * Copyright (c) 2011. The Apache Software Foundation
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20
21 package org.apache.hadoop.hbase.hbql.client;
22
23 public interface QueryListener<T> {
24
25 public enum ExceptionSource {
26 QUERYSTART, ONEACHROW, QUERYCOMPLETE, ITERATOR
27 }
28
29 void onQueryStart() throws HBqlException;
30
31 void onEachRow(T val) throws HBqlException;
32
33 void onQueryComplete() throws HBqlException;
34
35 void onException(ExceptionSource source, HBqlException e);
36 }