| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| package org.apache.karaf.decanter.collector.system; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.net.InetAddress; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Dictionary; |
| import java.util.Enumeration; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Optional; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| import org.apache.commons.exec.CommandLine; |
| import org.apache.commons.exec.DefaultExecutor; |
| import org.apache.commons.exec.PumpStreamHandler; |
| import org.osgi.service.component.ComponentContext; |
| import org.osgi.service.component.annotations.Activate; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.Reference; |
| import org.osgi.service.event.Event; |
| import org.osgi.service.event.EventAdmin; |
| import org.osgi.service.event.EventConstants; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| @Component( |
| name = "org.apache.karaf.decanter.collector.system", |
| immediate = true, |
| property = { "decanter.collector.name=system", |
| "scheduler.period:Long=60", |
| "scheduler.concurrent:Boolean=false", |
| "scheduler.name=decanter-collector-system" } |
| ) |
| public class SystemCollector implements Runnable { |
| |
| @Reference |
| public EventAdmin dispatcher; |
| |
| private final static Logger LOGGER = LoggerFactory.getLogger(SystemCollector.class); |
| |
| private Dictionary<String, Object> properties; |
| private String topic; |
| private int threadNumber; |
| |
| @SuppressWarnings("unchecked") |
| @Activate |
| public void activate(ComponentContext context) { |
| this.properties = context.getProperties(); |
| this.topic = context.getProperties().get(EventConstants.EVENT_TOPIC) != null ? String.class.cast(context.getProperties().get(EventConstants.EVENT_TOPIC)) : "decanter/collect/system/"; |
| if (!this.topic.endsWith("/")) { |
| this.topic = this.topic + "/"; |
| } |
| try { |
| this.threadNumber = context.getProperties().get("thread.number") != null ? Integer.parseInt(String.class.cast(context.getProperties().get("thread.number"))) : 1; |
| } catch (Exception e) { |
| throw new IllegalArgumentException("invalid parameter 'thread.number' is not a number"); |
| } |
| } |
| |
| @Override |
| public void run() { |
| if (properties != null) { |
| final String karafName = System.getProperty("karaf.name"); |
| final String topic = this.topic; |
| String hostAddress = null; |
| String hostName = null; |
| try { |
| hostAddress = InetAddress.getLocalHost().getHostAddress(); |
| hostName = InetAddress.getLocalHost().getHostName(); |
| } catch (Exception e) { |
| // nothing to do |
| } |
| |
| Collection<Callable<Object>> callables = new ArrayList<>(); |
| |
| Enumeration<String> keys = properties.keys(); |
| while (keys.hasMoreElements()) { |
| String key = keys.nextElement(); |
| if (key.startsWith("command.")) { |
| String finalHostAddress = hostAddress; |
| String finalHostName = hostName; |
| callables.add(() -> { |
| Event event = null; |
| try (ByteArrayOutputStream outputStream = new ByteArrayOutputStream()) { |
| String command = (String) properties.get(key); |
| LOGGER.debug("Executing {} ({})", command, key); |
| CommandLine cmdLine = CommandLine.parse(command); |
| DefaultExecutor executor = new DefaultExecutor(); |
| PumpStreamHandler streamHandler = new PumpStreamHandler(outputStream); |
| executor.setStreamHandler(streamHandler); |
| HashMap<String, Object> data = new HashMap<>(); |
| data.put("timestamp", System.currentTimeMillis()); |
| data.put("type", "system"); |
| data.put("karafName", karafName); |
| data.put("hostAddress", finalHostAddress); |
| data.put("hostName", finalHostName); |
| executor.execute(cmdLine); |
| outputStream.flush(); |
| String output = outputStream.toString(); |
| if (output.endsWith("\n")) { |
| output = output.substring(0, output.length() - 1); |
| } |
| output = output.trim(); |
| // try to convert to number |
| try { |
| if (output.contains(".")) { |
| Double value = Double.parseDouble(output); |
| data.put(key, value); |
| } else { |
| Integer value = Integer.parseInt(output); |
| data.put(key, value); |
| } |
| } catch (NumberFormatException e) { |
| data.put(key, output); |
| } |
| streamHandler.stop(); |
| event = new Event(topic + key.replace(".", "_"), data); |
| } catch (Exception e) { |
| LOGGER.warn("Command {} execution failed", key, e); |
| } |
| return event; |
| }); |
| } |
| } |
| |
| ExecutorService executorService = Executors.newFixedThreadPool(this.threadNumber); |
| try { |
| LOGGER.debug("Start invoking system commands..."); |
| List<Future<Object>> results = executorService.invokeAll(callables); |
| results.stream().forEach(objectFuture -> { |
| try { |
| Event event = Event.class.cast(objectFuture.get()); |
| if (Optional.ofNullable(event).isPresent()) { |
| dispatcher.postEvent(event); |
| } |
| } catch (InterruptedException | ExecutionException e) { |
| LOGGER.warn("Thread executor for the collector system failed", e); |
| } |
| }); |
| } catch (InterruptedException e) { |
| LOGGER.warn("Thread executor for the collector system failed", e); |
| } |
| executorService.shutdown(); |
| LOGGER.debug("Invoking system commands done"); |
| } |
| } |
| |
| } |