diff options
Diffstat (limited to 'src/main/java/org/onap/dcae/controller/FetchDynamicConfig.java')
| -rw-r--r-- | src/main/java/org/onap/dcae/controller/FetchDynamicConfig.java | 298 |
1 files changed, 147 insertions, 151 deletions
diff --git a/src/main/java/org/onap/dcae/controller/FetchDynamicConfig.java b/src/main/java/org/onap/dcae/controller/FetchDynamicConfig.java index 99e269c1..ed42a5a4 100644 --- a/src/main/java/org/onap/dcae/controller/FetchDynamicConfig.java +++ b/src/main/java/org/onap/dcae/controller/FetchDynamicConfig.java @@ -7,9 +7,9 @@ * 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.
@@ -20,171 +20,167 @@ package org.onap.dcae.controller;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
import org.json.JSONArray;
import org.json.JSONObject;
import org.json.JSONTokener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
-import com.fasterxml.jackson.databind.JsonNode;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import java.io.BufferedReader;
-import java.io.File;
-import java.io.FileWriter;
-import java.io.IOException;
-import java.io.InputStreamReader;
+import java.io.*;
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";
- private static String url;
- public static String retString;
- public static String retCBSString;
- private static Map<String, String> env;
+ private static final Logger log = LoggerFactory.getLogger(FetchDynamicConfig.class);
+
+ public static String configFile = "/opt/app/KV-Configuration.json";
+ public static String retString;
+ public static String retCBSString;
+ private static String url;
+ private static Map<String, String> env;
+
+ public FetchDynamicConfig() {
+ }
+
+ public static void main(String[] args) {
+ Boolean areEqual;
+ // Call consul api and identify the CBS Service address and port
+ getconsul();
+ // Construct and invoke CBS API to get application Configuration
+ getCBS();
+ // Verify if data has changed
+ areEqual = verifyConfigChange();
+ // If new config then write data returned into configFile for
+ // LoadDynamicConfig process
+ if (!areEqual) {
+ FetchDynamicConfig fc = new FetchDynamicConfig();
+ fc.writefile(retCBSString);
+ } else {
+ log.info("New config pull results identical - " + configFile + " NOT refreshed");
+ }
+ }
+
+ private 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 boolean verifyConfigChange() {
+
+ boolean areEqual = false;
+ // Read current data
+ try {
+ File f = new File(configFile);
+ if (f.exists() && !f.isDirectory()) {
+
+ String jsonData = LoadDynamicConfig.readFile(configFile);
+ JSONObject jsonObject = new JSONObject(jsonData);
+
+ ObjectMapper mapper = new ObjectMapper();
+
+ JsonNode tree1 = mapper.readTree(jsonObject.toString());
+ JsonNode tree2 = mapper.readTree(retCBSString);
+ areEqual = tree1.equals(tree2);
+ log.info("Comparison value:" + areEqual);
+ } else {
+ log.info("First time config file read: " + configFile);
+ }
+
+ } catch (IOException e) {
+ log.error("Comparison with new fetched data failed" + e.getMessage());
+
+ }
+
+ return areEqual;
+
+ }
+
+ 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 ");
+ }
+
+ }
+
+ private 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);
- public FetchDynamicConfig() {
- }
+ reader.close();
+ ipr.close();
+ } catch (IOException e) {
+ log.error("error", e);
+ e.printStackTrace();
+ }
+ return result;
- public static void main(String[] args) {
- Boolean areEqual;
- // Call consul api and identify the CBS Service address and port
- getconsul();
- // Construct and invoke CBS API to get application Configuration
- getCBS();
- // Verify if data has changed
- areEqual = verifyConfigChange();
- // If new config then write data returned into configFile for
- // LoadDynamicConfig process
- if (! areEqual) {
- FetchDynamicConfig fc = new FetchDynamicConfig();
- fc.writefile(retCBSString);
- } else {
- log.info("New config pull results identical - " + configFile + " NOT refreshed");
- }
- }
+ }
- private 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 boolean verifyConfigChange() {
-
- boolean areEqual = false;
- // Read current data
- try {
- File f = new File(configFile);
- if (f.exists() && !f.isDirectory()) {
-
- String jsonData = LoadDynamicConfig.readFile(configFile);
- JSONObject jsonObject = new JSONObject(jsonData);
-
- ObjectMapper mapper = new ObjectMapper();
-
- JsonNode tree1 = mapper.readTree(jsonObject.toString());
- JsonNode tree2 = mapper.readTree(retCBSString);
- areEqual = tree1.equals(tree2);
- log.info("Comparison value:" + areEqual);
- } else {
- log.info("First time config file read: " + configFile);
- }
-
- } catch (IOException e) {
- log.error("Comparison with new fetched data failed" + e.getMessage());
-
- }
-
- return areEqual;
-
- }
-
- 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();
- }
-
- }
-
- private static String executecurl(String url) {
+ public void writefile(String retCBSString) {
+ log.info("URL to fetch configuration:" + url + " Return String:" + retCBSString);
- 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;
+ String indentedretstring = (new JSONObject(retCBSString)).toString(4);
- while ((line = reader.readLine()) != null) {
- builder.append(line);
- }
- result = builder.toString();
- log.info(result);
+ try (FileWriter file = new FileWriter(FetchDynamicConfig.configFile)) {
+ file.write(indentedretstring);
- reader.close();
- ipr.close();
- } catch (IOException e) {
- log.error("error", e);
- e.printStackTrace();
- }
- return result;
+ 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();
+ }
- }
+ }
}
|