diff options
Diffstat (limited to 'UniversalVesAdapter/src/main/java/org/onap/universalvesadapter/utils/FetchDynamicConfig.java')
| -rw-r--r-- | UniversalVesAdapter/src/main/java/org/onap/universalvesadapter/utils/FetchDynamicConfig.java | 419 |
1 files changed, 223 insertions, 196 deletions
diff --git a/UniversalVesAdapter/src/main/java/org/onap/universalvesadapter/utils/FetchDynamicConfig.java b/UniversalVesAdapter/src/main/java/org/onap/universalvesadapter/utils/FetchDynamicConfig.java index af219ce..4bc66bb 100644 --- a/UniversalVesAdapter/src/main/java/org/onap/universalvesadapter/utils/FetchDynamicConfig.java +++ b/UniversalVesAdapter/src/main/java/org/onap/universalvesadapter/utils/FetchDynamicConfig.java @@ -1,196 +1,223 @@ -/* -* ============LICENSE_START======================================================= -* ONAP : DCAE -* ================================================================================ -* Copyright 2019 TechMahindra -*================================================================================= -* 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.universalvesadapter.utils; - -import java.io.BufferedReader; -import java.io.File; -import java.io.FileNotFoundException; -import java.io.FileReader; -import java.io.FileWriter; -import java.io.IOException; -import java.io.InputStreamReader; -import java.util.Map; -import org.json.JSONArray; -import org.json.JSONObject; -import org.json.JSONTokener; -import org.slf4j.Logger; -import org.slf4j.LoggerFactory; -import org.springframework.stereotype.Component; -import com.fasterxml.jackson.databind.JsonNode; -import com.fasterxml.jackson.databind.ObjectMapper; - -@Component -public class FetchDynamicConfig { - - private static final Logger debugLogger = LoggerFactory.getLogger("debugLogger"); - private static final Logger errorLogger = LoggerFactory.getLogger("errorLogger"); - - private static String url; - public static String retString; - public static String retCBSString; - private static Map<String, String> env; - - public FetchDynamicConfig() { - } - - public static void cbsCall(String configFile) { - - env = System.getenv(); - 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(configFile); - - if (!areEqual) { - FetchDynamicConfig fc = new FetchDynamicConfig(); - fc.writefile(retCBSString,configFile); - } else { - debugLogger.info("New config pull results identical - " + configFile + " NOT refreshed"); - } - } - - - private static void getconsul() { - url = env.get("CONSUL_HOST") + ":8500/v1/catalog/service/" + env.get("CONFIG_BINDING_SERVICE"); - retString = executecurl(url); - debugLogger.info("CBS details fetched from Consul"); - } - - public static boolean verifyConfigChange(String configFile) { - - boolean areEqual = false; - // Read current data - try { - File f = new File(configFile); - if (f.exists() && !f.isDirectory()) { - - String jsonData = 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); - debugLogger.info("Comparison value:" + areEqual); - } else { - debugLogger.info("First time config file read: " + configFile); - } - - } catch (IOException e) { - errorLogger.error("Comparison with new fetched data failed" + e.getMessage()); - - } - - return areEqual; - - } - - public static void getCBS() { - - // 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"); - - } - debugLogger.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 { - errorLogger.error("Service name environment variable - HOSTNAME/SERVICE_NAME not found within container "); - } - - } - - public void writefile(String retCBSString, String configFile) { - debugLogger.info("URL to fetch configuration:" + url); - - String indentedretstring = (new JSONObject(retCBSString)).toString(4); - - try (FileWriter file = new FileWriter(configFile)) { - file.write(indentedretstring); - - debugLogger.info("Successfully Copied JSON Object to file " + configFile); - } catch (IOException e) { - errorLogger.error("Error in writing configuration into file " + configFile + retString + e.getMessage()); - e.printStackTrace(); - } - - } - - public static String readFile(String filename) { - String result = ""; - try (BufferedReader br = new BufferedReader(new FileReader(filename))) { - StringBuilder sb = new StringBuilder(); - String line = br.readLine(); - while (line != null) { - sb.append(line); - line = br.readLine(); - } - result = sb.toString(); - } catch (FileNotFoundException e) { - errorLogger.error("colud not find file :",filename); - - } catch (Exception e) { - errorLogger.error("unable to read the file , reason:",e.getCause()); - } - return result; - } - 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(); - reader.close(); - ipr.close(); - } catch (IOException e) { - errorLogger.error("error", e); - e.printStackTrace(); - } - return result; - - } - -} +/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : DCAE
+ * ================================================================================
+ * Copyright 2019 TechMahindra
+ * ================================================================================
+ * 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.universalvesadapter.utils;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.PrintWriter;
+import java.nio.file.Files;
+import java.util.Map;
+
+import org.json.JSONArray;
+import org.json.JSONObject;
+import org.json.JSONTokener;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Component;
+import org.springframework.util.ResourceUtils;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+@Component
+public class FetchDynamicConfig {
+
+ private static final Logger debugLogger = LoggerFactory.getLogger("debugLogger");
+ private static final Logger errorLogger = LoggerFactory.getLogger("errorLogger");
+
+ private static String url;
+ public static String retString;
+ public static String retCBSString;
+ private static Map<String, String> env;
+
+ public FetchDynamicConfig() {}
+
+ public static void cbsCall(String configFile) {
+
+ env = System.getenv();
+ 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(configFile);
+
+ if (!areEqual) {
+ FetchDynamicConfig fc = new FetchDynamicConfig();
+ fc.writefile(retCBSString, configFile);
+ } else {
+ debugLogger.info("New config pull results identical - " + configFile
+ + " NOT refreshed");
+ }
+ }
+
+
+ private static void getconsul() {
+ url = env.get("CONSUL_HOST") + ":8500/v1/catalog/service/"
+ + env.get("CONFIG_BINDING_SERVICE");
+ retString = executecurl(url);
+ debugLogger.info("CBS details fetched from Consul");
+ }
+
+ public static boolean verifyConfigChange(String configFile) {
+
+ boolean areEqual = false;
+ // Read current data
+ try {
+
+ File f = new File(
+ ClassLoader.getSystemResource(configFile.trim()).getFile());
+
+ if (f.exists() && !f.isDirectory()) {
+ debugLogger.info(
+ "Comparing local configuration with the configuration fethed from CBS ");
+
+ String jsonData = 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);
+ debugLogger.info("Comparison value:" + areEqual);
+ } else {
+ debugLogger.info("First time config file read: " + configFile);
+ }
+
+ } catch (IOException e) {
+ errorLogger.error(
+ "Comparison with new fetched data failed" + e.getMessage());
+
+ }
+
+ return areEqual;
+
+ }
+
+ public static void getCBS() {
+
+ // 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");
+
+ }
+ debugLogger.info("CONFIG_BINDING_SERVICE HOST:PORT is " + urlPart1);
+
+ if (env.containsKey("HOSTNAME")) {
+ url = urlPart1 + "/service_component/" + env.get("HOSTNAME");
+ retCBSString = executecurl(url);
+ debugLogger.info("Configuration fetched from CBS successfully..");
+ } else if (env.containsKey("SERVICE_NAME")) {
+ url = urlPart1 + "/service_component/" + env.get("SERVICE_NAME");
+ retCBSString = executecurl(url);
+ debugLogger.info("Configuration fetched from CBS successfully..");
+ } else {
+ errorLogger.error(
+ "Service name environment variable - HOSTNAME/SERVICE_NAME not found within container ");
+ }
+
+ }
+
+ public void writefile(String retCBSString, String configFile) {
+
+ String indentedretstring = (new JSONObject(retCBSString)).toString(4);
+ File f = new File(ClassLoader.getSystemResource(configFile.trim()).getFile());
+ try {
+ debugLogger.info("Overwriting local configuration file " + configFile
+ + " with configuartions received from CBS");
+
+
+ File file2 = ResourceUtils.getFile("classpath:" + configFile);
+ FileWriter fstream = new FileWriter(file2, false);
+ PrintWriter printWriter = new PrintWriter(fstream);
+ printWriter.print(indentedretstring);
+ printWriter.close();
+
+ debugLogger.info("New Config successfully written to local file to "
+ + configFile);
+ } catch (IOException e) {
+ errorLogger.error("Error in writing configuration into local KV file "
+ + configFile + retString + e.getMessage());
+ e.printStackTrace();
+ }
+
+ }
+
+ public static String readFile(String configFileName) {
+ String content = null;
+ File file = null;
+
+ try {
+ file = ResourceUtils.getFile("classpath:" + configFileName);
+ content = new String(Files.readAllBytes(file.toPath()));
+ } catch (FileNotFoundException e) {
+ errorLogger.error("colud not find file :", file.getName());
+
+ } catch (IOException e) {
+ errorLogger.error("unable to read the file , reason:", e.getCause());
+ } catch (Exception e) {
+ errorLogger.error("Exception occured , reason:", e.getMessage());
+ }
+
+ return content;
+
+ }
+
+ 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();
+ reader.close();
+ ipr.close();
+ } catch (IOException e) {
+ errorLogger.error("error", e);
+ e.printStackTrace();
+ }
+ return result;
+
+ }
+
+}
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