blob: a789c0a4c26dc9cde6029d492faab8740f9ba2cf (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
/*******************************************************************************
* Copyright 2016-2017 ZTE, Inc. and others.
*
* 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 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.onap.msb.apiroute.wrapper.dao;
import org.onap.msb.apiroute.wrapper.util.JedisUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.ScanParams;
import redis.clients.jedis.ScanResult;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
public class RedisAccessWrapper {
private static final Logger LOGGER = LoggerFactory.getLogger(RedisAccessWrapper.class);
//An iteration starts when the cursor is set to 0
private static final String REDIS_SCAN_POINTER_NEW_ITERATION = "0";
//An iteration terminated when the cursor returned by the server is 0
private static final String REDIS_SCAN_POINTER_ITERATION_END = "0";
private static final int REDIS_SCAN_COUNT = 50;
public static void save(String key,String value) throws Exception {
Jedis jedis = null;
try {
jedis = JedisUtil.borrowJedisInstance();
jedis.set(key,value);
} finally {
JedisUtil.returnJedisInstance(jedis);
}
}
public static String query(String key) throws Exception {
Jedis jedis = null;
String value = null;
try {
jedis = JedisUtil.borrowJedisInstance();
value = jedis.get(key);
}finally {
JedisUtil.returnJedisInstance(jedis);
}
return value;
}
public static long delete(String key) throws Exception {
Jedis jedis = null;
long reply = 0L;
try {
jedis = JedisUtil.borrowJedisInstance();
reply = jedis.del(key);
} finally {
JedisUtil.returnJedisInstance(jedis);
}
return reply;
}
public static boolean isExist(String key) throws Exception {
boolean isExist = false;
Jedis jedis = null;
try {
jedis = JedisUtil.borrowJedisInstance();
isExist = jedis.exists(key);
} finally {
JedisUtil.returnJedisInstance(jedis);
}
return isExist;
}
public static List<String> queryMultiKeys(String keyPattern) throws Exception {
Set<String> keySet = filterKeys(keyPattern);
List<String> valueList = new ArrayList<>();
Jedis jedis = null;
try {
jedis = JedisUtil.borrowJedisInstance();
for(String key : keySet){
String value = jedis.get(key);
if(value !=null && !"".equals(value)){
valueList.add(value);
}
}
} finally {
JedisUtil.returnJedisInstance(jedis);
}
return valueList;
}
public static long deleteMultiKeys(String keyPattern) throws Exception {
Set<String> keySet = filterKeys(keyPattern);
long replySum = 0L;
Jedis jedis = null;
try {
jedis = JedisUtil.borrowJedisInstance();
for(String key : keySet){
long reply = jedis.del(key);
replySum = replySum + reply;
}
} finally {
JedisUtil.returnJedisInstance(jedis);
}
return replySum;
}
/**
* filter the keys according to the given pattern
* using "scan" instead of using "keys", incrementally iterate the keys space
* @param pattern the input filter pattern
* @return the matched keys set
*/
public static Set<String> filterKeys(String pattern) throws Exception{
long start = System.currentTimeMillis();
Jedis jedis = null;
Set<String> filteredKeys = new HashSet<>();
ScanParams scanParams = new ScanParams();
scanParams.match(pattern);
scanParams.count(REDIS_SCAN_COUNT);
try {
jedis = JedisUtil.borrowJedisInstance();
ScanResult<String> scanResult = jedis.scan(REDIS_SCAN_POINTER_NEW_ITERATION,scanParams);
filteredKeys.addAll(scanResult.getResult());
while(!scanResult.getStringCursor().equals(REDIS_SCAN_POINTER_ITERATION_END)){
scanResult = jedis.scan(scanResult.getStringCursor(),scanParams);
filteredKeys.addAll(scanResult.getResult());
}
} finally {
JedisUtil.returnJedisInstance(jedis);
}
long end = System.currentTimeMillis();
long costTime = end-start;
LOGGER.info("filterKeys " + pattern + " count:" + filteredKeys.size() + " cost: " + costTime);
return filteredKeys;
}
}
|
