Implement second part of dynamic DMaaP config

VESCollector app can now fetch CBS configuration and
rebuilt the part regarding sending events dynamically,
without restarting application.
Application will still be restarted by a .sh script,
if there were changes regarding collector.properties file.
The decision of whether dynamic configuration should be
triggered is now based on existence of env vars
CONSUL_HOST, CONFIG_BINDING_SERVICE, HOSTNAME,
not as previously on CBSPOLLTIME.
Frequency at which the config check should happen is
now exposed via property from collector.properties

Change-Id: I98ff160fa51d08d84a23c716d90ceaacbe17ada6
Signed-off-by: PawelSzalapski <pawel.szalapski@nokia.com>
Issue-ID: DCAEGEN2-519

1 files changed, 0 insertions, 186 deletions

diff --git a/src/main/java/org/onap/dcae/controller/FetchDynamicConfig.java b/src/main/java/org/onap/dcae/controller/FetchDynamicConfig.java
deleted file mode 100644
index ed42a5a4..00000000
--- a/src/main/java/org/onap/dcae/controller/FetchDynamicConfig.java
+++ /dev/null
@@ -1,186 +0,0 @@
-/*-

- * ============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 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 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";

-    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);

-

-            reader.close();

-            ipr.close();

-        } catch (IOException e) {

-            log.error("error", e);

-            e.printStackTrace();

-        }

-        return result;

-

-    }

-

-    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();

-        }

-

-    }

-

-}