1 files changed, 114 insertions, 0 deletions
diff --git a/src/main/java/org/onap/dcae/controller/FetchDynamicConfig.java b/src/main/java/org/onap/dcae/controller/FetchDynamicConfig.java
new file mode 100644
index 00000000..caee9c4d
--- /dev/null
+++ b/src/main/java/org/onap/dcae/controller/FetchDynamicConfig.java
@@ -0,0 +1,114 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * PROJECT
+ * ================================================================================
+ * Copyright (C) 2017 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 java.io.BufferedReader;
+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;
+
+public class FetchDynamicConfig {
+
+	static String configFile = "/opt/app/KV-Configuration.json";
+	static String url = null;
+	static String ret_string = null;
+
+	public FetchDynamicConfig() {
+
+	}
+
+	public static void main(String[] args) {
+		Map<String, String> env = System.getenv();
+		for (String envName : env.keySet()) {
+			System.out.format("%s=%s%n", envName, env.get(envName));
+		}
+
+		if (env.containsKey("CONSUL_HOST") && env.containsKey("CONFIG_BINDING_SERVICE")
+				 && env.containsKey("HOSTNAME")) {
+			System.out.println(">>>Dynamic configuration to be fetched from ConfigBindingService");
+			url = env.get("CONSUL_HOST") + ":8500/v1/catalog/service/" + env.get("CONFIG_BINDING_SERVICE");
+
+			ret_string = executecurl(url);
+			// consul return as array
+			JSONTokener temp = new JSONTokener(ret_string);
+			JSONObject cbsjobj = (JSONObject) new JSONArray(temp).get(0);
+
+			String url_part1 = null;
+			if (cbsjobj.has("ServiceAddress") && cbsjobj.has("ServicePort")) {
+				url_part1 = cbsjobj.getString("ServiceAddress") + ":" + cbsjobj.getInt("ServicePort");
+			}
+
+			System.out.println("CONFIG_BINDING_SERVICE DNS RESOLVED:" + url_part1);
+			url = url_part1 + "/service_component/" + env.get("HOSTNAME");
+			ret_string = executecurl(url);
+
+			JSONObject jsonObject = new JSONObject(new JSONTokener(ret_string));
+			try (FileWriter file = new FileWriter(configFile)) {
+				file.write(jsonObject.toString());
+
+				System.out.println("Successfully Copied JSON Object to file /opt/app/KV-Configuration.json");
+			} catch (IOException e) {
+				System.out.println(
+						"Error in writing configuration into file /opt/app/KV-Configuration.json " + jsonObject);
+				e.printStackTrace();
+			}
+		}
+
+		else {
+			System.out.println(">>>Static configuration to be used");
+		}
+
+	}
+
+	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 = null;
+
+			while ((line = reader.readLine()) != null) {
+				builder.append(line);
+			}
+			result = builder.toString();
+			System.out.println(result);
+
+		} catch (IOException e) {
+			System.out.print("error");
+			e.printStackTrace();
+		}
+		return result;
+
+	}
+
+}