Examples of com.dianping.cat.message.Transaction

com.dianping.cat.message.Transaction

Transaction is any interesting unit of work that takes time to complete and may fail.

Basically, all data access across the boundary needs to be logged as a Transaction since it may fail and time consuming. For example, URL request, disk IO, JDBC query, search query, HTTP request, 3rd party API call etc.

Sometime if A needs call B which is owned by another team, although A and B are deployed together without any physical boundary. To make the ownership clear, there could be some Transaction logged when A calls B.

Most of Transaction should be logged in the infrastructure level or framework level, which is transparent to the application.

All CAT message will be constructed as a message tree and send to back-end for further analysis, and for monitoring. Only Transaction can be a tree node, all other message will be the tree leaf.　The transaction without other messages nested is an atomic transaction.
@author Frankie Wu

  }


  @Test
  public void sendLongSQLTransaction() throws Exception {
    for (int i = 0; i < 10; i++) {
      Transaction t = Cat.getProducer().newTransaction("SQL", "Method6");
      t.addData("key and value");
      Thread.sleep(102);
      t.complete();
    }
  }

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  }


  @Test
  public void testTransactionNormal() {
    long timestamp = 1325489621987L;
    Transaction root = newTransaction("URL", "Review", timestamp, "0", 100, "/review/2468");


    root.addChild(newEvent("URL", "Payload", timestamp, "0", "ip=127.0.0.1&ua=Mozilla 5.0...&refer=...&..."));
    root.addChild(newTransaction("Service", "Auth", timestamp, "0", 20, "userId=1357&token=..."));
    root.addChild(newTransaction("Cache", "findReviewByPK", timestamp + 22, "Missing", 1, "2468") //
          .addChild(newEvent("CacheHost", "host-1", timestamp + 22, "0", "ip=192.168.8.123")));
    root.addChild(newTransaction("DAL", "findReviewByPK", timestamp + 25, "0", 5, "select title,content from Review where id = ?"));
    root.addChild(newEvent("URL", "View", timestamp + 40, "0", "view=HTML"));


    check(root, "t2012-01-02 15:33:41.987\tURL\tReview\t\n" + //
          "E2012-01-02 15:33:41.987\tURL\tPayload\t0\tip=127.0.0.1&ua=Mozilla 5.0...&refer=...&...\t\n" + //
          "A2012-01-02 15:33:41.987\tService\tAuth\t0\t20000us\tuserId=1357&token=...\t\n" + //
          "t2012-01-02 15:33:42.009\tCache\tfindReviewByPK\t\n" + //

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  }


  @Test
  public void testTransactionSimple() {
    long timestamp = 1325489621987L;
    Transaction transaction = newTransaction("type", "name", timestamp, "0", 10, "here is the data.");


    check(transaction, "A2012-01-02 15:33:41.987\ttype\tname\t0\t10000us\there is the data.\t\n");
  }

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  private String parseHost() {
    MessageTree tree = (MessageTree) Cat.getManager().getThreadLocalMessageTree();
    Message message = tree.getMessage();


    if (message.getType().equals("URL") && message instanceof Transaction) {
      Transaction t = (Transaction) message;
      List<Message> messages = t.getChildren();


      for (Message temp : messages) {
        String name = temp.getName();
        if (name.equals("URL.Server") || name.equals("ClientInfo")) {
          m_data = temp.getData().toString();

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    m_logger.info(String.format("Finishing %s tasks in period [%s, %s]", m_tasks.size(), df.format(startDate),
          df.format(endDate)));


    MessageProducer cat = Cat.getProducer();
    Transaction t = cat.newTransaction("Checkpoint", "RealtimeConsumer");


    try {
      for (PeriodTask task : m_tasks) {
        task.finish();
      }


      t.setStatus(Message.SUCCESS);
    } catch (Throwable e) {
      cat.logError(e);
      t.setStatus(e);
    } finally {
      t.complete();


      m_logger.info(String.format("Finished %s tasks in period [%s, %s]", m_tasks.size(), df.format(startDate),
            df.format(endDate)));
    }
  }

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    });
  }


  @Override
  public void doCheckpoint(boolean atEnd) {
    Transaction t = Cat.newTransaction("Checkpoint", "dump");


    try {
      long startTime = getStartTime();


      checkpointAsyc(startTime);
      m_logger.info("Old version domains:" + m_oldVersionDomains);
      m_logger.info("Error timestamp:" + m_errorTimestampDomains);
      t.setStatus(Transaction.SUCCESS);
    } catch (Exception e) {
      t.setStatus(e);
    } finally {
      t.complete();
    }
  }

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    }
  }


  public void doCheckpoint() throws IOException {
    MessageProducer cat = Cat.getProducer();
    Transaction t = cat.newTransaction("Checkpoint", getClass().getSimpleName());


    try {
      long currentStartTime = getCurrentStartTime();
      Period period = m_periodManager.findPeriod(currentStartTime);


      for (MessageAnalyzer analyzer : period.getAnalzyers()) {
        try {
          analyzer.doCheckpoint(false);
        } catch (Exception e) {
          Cat.logError(e);
        }
      }


      try {
        // wait dump analyzer store completed
        Thread.sleep(10 * 1000);
      } catch (InterruptedException e) {
        // ignore
      }
      t.setStatus(Message.SUCCESS);
    } catch (RuntimeException e) {
      cat.logError(e);
      t.setStatus(e);
    } finally {
      t.complete();
    }
  }

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  private void processOneEntity(MonitorEntity entity) {
    String targetUrl = entity.getTargetUrl();
    String url = parseFormatUrl(targetUrl);


    if (url != null) {
      Transaction t = Cat.newTransaction("Monitor", url);
      String ip = entity.getIp();
      IpInfo ipInfo = m_ipService.findIpInfoByString(ip);


      try {
        if (ipInfo != null) {
          buildMessage(entity, url, ipInfo);
        } else {
          Cat.logEvent("ip", "notFound", Event.SUCCESS, ip);
        }
        t.setStatus(Transaction.SUCCESS);
      } catch (Exception e) {
        Cat.logError(e);
        t.setStatus(e);
      } finally {
        t.complete();
      }
    }
  }

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    Cat.setup(null);
  }


  @Test
  public void testForkedTransaction() throws Exception {
    Transaction t = Cat.newTransaction("ForkedRoot", "Root");
    ForkedTransaction t1 = Cat.newForkedTransaction("ForkedChild", "Child1");
    ForkedTransaction t2 = Cat.newForkedTransaction("ForkedChild", "Child2");


    Threads.forGroup().start(new TimedThread(t1, 500)); // will run away
    Threads.forGroup().start(new TimedThread(t2, 100)); // will be back in time


    TimeUnit.MILLISECONDS.sleep(200);


    t.setStatus(Message.SUCCESS);
    t.complete();
  }

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    t.complete();
  }


  @Test
  public void testTaggedTransaction() throws Exception {
    Transaction t = Cat.newTransaction("TaggedRoot", "Root");
    Cat.newTaggedTransaction("TaggedChild", "Child1", "Tag1");
    Cat.newTaggedTransaction("TaggedChild", "Child2", "Tag2");


    Threads.forGroup().start(new TaggedThread(500, "Tag1"));
    Threads.forGroup().start(new TaggedThread(100, "Tag2"));


    TimeUnit.MILLISECONDS.sleep(200);


    t.setStatus(Message.SUCCESS);
    t.complete();
  }

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