Java tutorial
/* ************************************************************************ # RESTful API for Zabbix based on Java. # # Copyright 2014 Yahya Al-Hazmi, TU Berlin. # Authors: Mingyuan Wu and Yahya Al-Hazmi # 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 # # This API allows you to request monitoring information from Zabbix-Server # through Zabbix-API ************************************************************************ This class is aimed to achieve the goal of getting cpu metrics from zabbix. ************************************************************************ */ import java.util.concurrent.atomic.AtomicLong; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import org.json.simple.JSONObject; import org.json.simple.JSONArray; import org.json.simple.parser.ParseException; import org.json.simple.parser.JSONParser; import java.util.Properties; import java.io.FileInputStream; import java.io.ByteArrayInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.io.UnsupportedEncodingException; import org.apache.commons.httpclient.HttpClient; import org.apache.commons.httpclient.HttpException; import org.apache.commons.httpclient.methods.PutMethod; @Controller public class CPUController { private final AtomicLong counter = new AtomicLong(); //---------------This Part starts the Zabbix connection--------------- private static String ZABBIX_API_URL = "http://193.175.132.250/zabbix/api_jsonrpc.php"; // zabbix_server @RequestMapping("/cpu") public @ResponseBody CPU cpu( @RequestParam(value = "authentication", required = false, defaultValue = "Error") String authentication, @RequestParam(value = "hostid", required = false, defaultValue = "") String hostid, @RequestParam(value = "metricType", required = false, defaultValue = "") String name) throws FileNotFoundException, UnsupportedEncodingException, IOException { Properties props = new Properties(); FileInputStream fis = new FileInputStream("properties.xml"); //loading properites from properties file props.loadFromXML(fis); String server_ip = props.getProperty("server_ip"); String ZABBIX_API_URL = "http://" + server_ip + "/api_jsonrpc.php"; // 1.2.3.4 is your zabbix_server_ip JSONParser parser = new JSONParser(); HttpClient client = new HttpClient(); PutMethod putMethod = new PutMethod(ZABBIX_API_URL); putMethod.setRequestHeader("Content-Type", "application/json-rpc"); // content-type is controlled in api_jsonrpc.php, so set it like this // create json object for apiinfo.version JSONObject jsonObj = new JSONObject(); jsonObj.put("jsonrpc", "2.0"); jsonObj.put("method", "item.get"); JSONObject params = new JSONObject(); params.put("output", "extend"); params.put("hostid", hostid); JSONObject search = new JSONObject(); search.put("key_", "cpu"); params.put("search", search); params.put("sortfield", "name"); jsonObj.put("params", params); jsonObj.put("auth", authentication);// todo jsonObj.put("id", new Integer(1)); putMethod.setRequestBody(jsonObj.toString()); // put the json object as input stream into request body String loginResponse = ""; String cpu = ""; String clock = ""; String metricType = ""; try { client.executeMethod(putMethod); // send to request to the zabbix api loginResponse = putMethod.getResponseBodyAsString(); // read the result of the response Object obj = parser.parse(loginResponse); JSONObject obj2 = (JSONObject) obj; String jsonrpc = (String) obj2.get("jsonrpc"); JSONArray array = (JSONArray) obj2.get("result"); // System.out.println(array); for (int i = 0; i < array.size(); i++) { JSONObject tobj = (JSONObject) array.get(i); String key = (String) tobj.get("key_"); if (!tobj.get("hostid").equals(hostid)) continue; if (name.equals("idle") && key.contains("idle")) { cpu = (String) tobj.get("lastvalue"); clock = (String) tobj.get("lastclock"); metricType = "cpu idle time"; } else if (name.equals("iowait") && key.contains("iowait")) { cpu = (String) tobj.get("lastvalue"); clock = (String) tobj.get("lastclock"); metricType = "cpu iowait time"; } else if (name.equals("nice") && key.contains("nice")) { cpu = (String) tobj.get("lastvalue"); clock = (String) tobj.get("lastclock"); metricType = "cpu nice time"; } else if (name.equals("system") && key.contains("system")) { cpu = (String) tobj.get("lastvalue"); clock = (String) tobj.get("lastclock"); metricType = "cpu system time"; } else if (name.equals("user") && key.contains("user")) { cpu = (String) tobj.get("lastvalue"); clock = (String) tobj.get("lastclock"); metricType = "cpu user time"; } else if (name.equals("load") && key.contains("load")) { cpu = (String) tobj.get("lastvalue"); clock = (String) tobj.get("lastclock"); metricType = "processor load"; } else if (name.equals("usage") && key.contains("usage")) { cpu = (String) tobj.get("lastvalue"); clock = (String) tobj.get("lastclock"); metricType = "system cpu usage average"; } } } catch (HttpException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (ParseException pe) { System.out.println("Error"); } if (cpu.equals("")) { return new CPU( "Error: Please provide the appropriate input parameters of the metric you are looking for its corresponding monitoring data:"); } return new CPU(hostid, metricType, cpu, clock); } //--------------This part ends the Zabbix connection------------------ }