001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.hadoop.hbase.client; 019 020import org.apache.hbase.thirdparty.com.google.common.base.Throwables; 021 022import java.util.ArrayList; 023import java.util.List; 024 025import org.apache.hadoop.hbase.client.metrics.ScanMetrics; 026 027final class SimpleScanResultConsumer implements ScanResultConsumer { 028 029 private ScanMetrics scanMetrics; 030 031 private final List<Result> results = new ArrayList<>(); 032 033 private Throwable error; 034 035 private boolean finished = false; 036 037 @Override 038 public void onScanMetricsCreated(ScanMetrics scanMetrics) { 039 this.scanMetrics = scanMetrics; 040 } 041 042 @Override 043 public synchronized boolean onNext(Result result) { 044 results.add(result); 045 return true; 046 } 047 048 @Override 049 public synchronized void onError(Throwable error) { 050 this.error = error; 051 finished = true; 052 notifyAll(); 053 } 054 055 @Override 056 public synchronized void onComplete() { 057 finished = true; 058 notifyAll(); 059 } 060 061 public synchronized List<Result> getAll() throws Exception { 062 while (!finished) { 063 wait(); 064 } 065 if (error != null) { 066 Throwables.propagateIfPossible(error, Exception.class); 067 throw new Exception(error); 068 } 069 return results; 070 } 071 072 public ScanMetrics getScanMetrics() { 073 return scanMetrics; 074 } 075}