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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/*
* ============LICENSE_START=======================================================
* feature-server-pool
* ================================================================================
* Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.drools.serverpool;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.nio.charset.StandardCharsets;
import java.util.Comparator;
import java.util.Timer;
import java.util.UUID;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Util {
private static Logger logger = LoggerFactory.getLogger(Util.class);
// create a shared 'Timer' instance
public static final Timer timer = new Timer("Server Pool Timer", true);
/**
* Internally, UUID objects use two 'long' variables, and the default
* comparison is signed, which means the order for the first and 16th digit
* is: '89abcdef01234567', while the order for the rest is
* '0123456789abcdef'.
* The following comparator uses the ordering '0123456789abcdef' for all
* digits.
*/
public static final Comparator<UUID> uuidComparator =
new Comparator<UUID>() {
public int compare(UUID u1, UUID u2) {
// compare most significant portion
int rval = Long.compareUnsigned(u1.getMostSignificantBits(),
u2.getMostSignificantBits());
if (rval == 0) {
// most significant portion matches --
// compare least significant portion
rval = Long.compareUnsigned(u1.getLeastSignificantBits(),
u2.getLeastSignificantBits());
}
return rval;
}
};
/* ============================================================ */
/**
* write a UUID to an output stream.
*
* @param ds the output stream
* @param uuid the uuid to write
*/
public static void writeUuid(DataOutputStream ds, UUID uuid) throws IOException {
// write out 16 byte UUID
ds.writeLong(uuid.getMostSignificantBits());
ds.writeLong(uuid.getLeastSignificantBits());
}
/**
* read a UUID from an input stream.
*
* @param ds the input stream
*/
public static UUID readUuid(DataInputStream ds) throws IOException {
long mostSigBits = ds.readLong();
long leastSigBits = ds.readLong();
return new UUID(mostSigBits, leastSigBits);
}
/* ============================================================ */
/**
* Read from an 'InputStream' until EOF or until it is closed. This method
* may block, depending on the type of 'InputStream'.
*
* @param input This is the input stream
* @return A 'String' containing the contents of the input stream
*/
public static String inputStreamToString(InputStream input) {
try {
return IOUtils.toString(input, StandardCharsets.UTF_8);
} catch (IOException e) {
// TODO Auto-generated catch block
logger.error("Util.inputStreamToString error", e);
return "";
}
}
/* ============================================================ */
/**
* Serialize an object into a byte array.
*
* @param object the object to serialize
* @return a byte array containing the serialized object
* @throws IOException this may be an exception thrown by the output stream,
* a NotSerializableException if an object can't be serialized, or an
* InvalidClassException
*/
public static byte[] serialize(Object object) throws IOException {
try (ByteArrayOutputStream bos = new ByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(bos)) {
oos.writeObject(object);
oos.flush();
return bos.toByteArray();
}
}
/**
* Deserialize a byte array into an object.
*
* @param data a byte array containing the serialized object
* @return the deserialized object
* @throws IOException this may be an exception thrown by the input stream,
* a StreamCorrupted Exception if the information in the stream is not
* consistent, an OptionalDataException if the input data primitive data,
* rather than an object, or InvalidClassException
* @throws ClassNotFoundException if the class of a serialized object can't
* be found
*/
public static Object deserialize(byte[] data) throws IOException, ClassNotFoundException {
try (ByteArrayInputStream bis = new ByteArrayInputStream(data);
ObjectInputStream ois = new ObjectInputStream(bis)) {
return ois.readObject();
}
}
/**
* Deserialize a byte array into an object.
*
* @param data a byte array containing the serialized object
* @param classLoader the class loader to use when locating classes
* @return the deserialized object
* @throws IOException this may be an exception thrown by the input stream,
* a StreamCorrupted Exception if the information in the stream is not
* consistent, an OptionalDataException if the input data primitive data,
* rather than an object, or InvalidClassException
* @throws ClassNotFoundException if the class of a serialized object can't
* be found
*/
public static Object deserialize(byte[] data, ClassLoader classLoader)
throws IOException, ClassNotFoundException {
try (ByteArrayInputStream bis = new ByteArrayInputStream(data);
ExtendedObjectInputStream ois =
new ExtendedObjectInputStream(bis, classLoader)) {
return ois.readObject();
}
}
/**
* Shutdown the timer thread.
*/
public static void shutdown() {
timer.cancel();
}
}
|
