blob: 7b2e0b3b5529c2c7929429cc3efefa6ed93a92e4 (
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
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/*-
* ============LICENSE_START=======================================================
* PROJECT
* ================================================================================
* Copyright (C) 2017-2018 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.dcae.controller;
import org.json.JSONArray;
import org.json.JSONObject;
import org.json.JSONTokener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.BufferedReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Map;
public class FetchDynamicConfig {
private static final Logger log = LoggerFactory.getLogger(FetchDynamicConfig.class);
public static String configFile = "/opt/app/KV-Configuration.json";
static String url;
public static String retString;
public static String retCBSString;
public static Map<String, String> env;
public FetchDynamicConfig() {
}
public static void main(String[] args) {
//Call consul api and identify the CBS Service address and port
getconsul();
//Construct and invoke CBS API to get application Configuration
getCBS();
//Write data returned into configFile for LoadDynamicConfig process to pickup
FetchDynamicConfig fc= new FetchDynamicConfig();
fc.writefile(retCBSString);
}
public static void getconsul()
{
env = System.getenv();
for (Map.Entry<String, String> entry : env.entrySet()) {
log.info( entry.getKey() + ":"+ entry.getValue());
}
if (env.containsKey("CONSUL_HOST") && env.containsKey("CONFIG_BINDING_SERVICE")) {
// && env.containsKey("HOSTNAME")) {
log.info(">>>Dynamic configuration to be fetched from ConfigBindingService");
url = env.get("CONSUL_HOST") + ":8500/v1/catalog/service/" + env.get("CONFIG_BINDING_SERVICE");
retString = executecurl(url);
} else {
log.info(">>>Static configuration to be used");
}
}
public static void getCBS()
{
env = System.getenv();
// consul return as array
JSONTokener temp = new JSONTokener(retString);
JSONObject cbsjobj = (JSONObject) new JSONArray(temp).get(0);
String urlPart1 = null;
if (cbsjobj.has("ServiceAddress") && cbsjobj.has("ServicePort")) {
urlPart1 = cbsjobj.getString("ServiceAddress") + ":" + cbsjobj.getInt("ServicePort");
}
log.info("CONFIG_BINDING_SERVICE DNS RESOLVED:" + urlPart1);
if (env.containsKey("HOSTNAME"))
{
url = urlPart1 + "/service_component/" + env.get("HOSTNAME");
retCBSString = executecurl(url);
}
else if (env.containsKey("SERVICE_NAME"))
{
url = urlPart1 + "/service_component/" + env.get("SERVICE_NAME");
retCBSString = executecurl(url);
}
else
{
log.error("Service name environment variable - HOSTNAME/SERVICE_NAME not found within container ");
}
}
public void writefile (String retCBSString)
{
log.info("URL to fetch configuration:" + url + " Return String:" + retCBSString);
String indentedretstring=(new JSONObject(retCBSString)).toString(4);
try (FileWriter file = new FileWriter(FetchDynamicConfig.configFile)) {
file.write(indentedretstring);
log.info("Successfully Copied JSON Object to file " + configFile);
} catch (IOException e) {
log.error("Error in writing configuration into file " + configFile + retString + e.getMessage());
e.printStackTrace();
}
}
public static String executecurl(String url) {
String[] command = { "curl", "-v", url };
ProcessBuilder process = new ProcessBuilder(command);
Process p;
String result = null;
try {
p = process.start();
InputStreamReader ipr = new InputStreamReader(p.getInputStream());
BufferedReader reader = new BufferedReader(ipr);
StringBuilder builder = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
builder.append(line);
}
result = builder.toString();
log.info(result);
reader.close();
ipr.close();
} catch (IOException e) {
log.error("error", e);
e.printStackTrace();
}
return result;
}
}
|
