People have been asking us time over time, if it’s possible to disable MoSKito in a running system completely. Also we don’t understand why you’d ever want to do it, after first pull request for this feature has been opened, we understood that people are quite serious about it. Well your wish, is our command, so here it goes.
We continuously monitor how other developers use MoSKito with a wide variety of their web-apps, we carefully listen to their feedback and in response we keep adding new features along with tweaking existing ones to make MoSKito more and more robust with every released version.
Today we would like to introduce you two more built-in tags. These new tags were found to be highly useful in real working environments. They will save you a lot of time and they will allow you to understand reasons behind certain bugs much easier.
Custom dashboards are clearly one of the most useful visualization features MoSKito has to offer. The ability to see all related information at a glance collected in one place improves the analytic capabilities and help tracking the anomalies. However, until now, configuring a dashboard could be cumbersome especially with high amount of charts and producers. Also adding a new producer to the system would require to add it to the dashboard explicitly, a step that could easily be overlooked. With MoSKito 2.8.7 we improved!
From time to time we are asked by the users of MoSKito, how to do this or that, and how to implement a specific use-case with MoSKito. This is why we started a recipes section in our documentation and now also on the blog. A recipe will describe how to achieve a specific goal.
So the original question which led to this recipe: “Lets say I have a process, some kind of job, which is running every x seconds, and I want to monitor the number of successful and unsuccessful executions, with least possible effort”. And here how it goes.
MoSKito has many powerful features, it can monitor almost every aspect of your application, it is the worlds best open-source APM for Java. But sometimes all this functionality can be a bit overwhelming to the user, and you might run into some issues figuring out how monitor your app efficiently. To address this, and give you an example of problem solving with MoSKito, today we will give you an insight on a real life case of tracing bugs and optimizing your application using MoSKito.
In this tutorial we will demonstrate how to use MoSKito Javaagent to monitor existing web-application with no changes to the app’s source code. We will show how to add MoSKito Javaagent to the app deployed in Tomcat servlet container, and how to connect to this app using MoSKito Inspect.
We programmers never make mistakes. Or so we think and say. However, from time to time errors manage to sneak to production systems and no one seems to know how. Well MoSKito won’t change this, but it can help you hunting errors. And here is how.
Today MoSKito 2.7.3 is released, and it contains the hottest feature since long time. But decide for yourself.
The feature request goes back some years to Dec 02, 2010 to my time at Parship, as Malte once asked, if it would be possible to know where a call to a method actually came from. It was on the list since then, but time was hard to find.
So what are tracers anyway? Tracers have 3 purposes or aspects:
- Tracers allow you to find out which part of your code has been calling some methods in a class of your application you are interested in. They achieve it by guarding the class in question (works with most monitoring points) and triggering and saving a stack trace once something passes by. This is useful if you see strange behavior of some method/class in the MoSKito monitoring, but don’t know who is actually using this class.
- After the execution has passed the tracer, the tracer start to record everything that happens afterwards. This means that a TracedCall (part of MoSKito Journey) is created on the fly and recorded. Every call on the monitored class will be noted, along with parameters and return values.
- To round this up, tracer will gather some amount of traces (code passing by). Depending on how you configured MoSKito, the tracers could collect only calls with largest duration or simply oldest or newest calls. This way you can run a tracer over a long period of time, collect all slow calls and investigate what slows them down.
Today we are going to connect MoSKito-Central to MongoDB database.
In a few words, MoSKito-Central is a service (remote or embedded) that receives your MoSKito statistics and stores it in the place of your choice (Filesystem, Database, …).
Our choice for now is MongoDB and MoSKito-Central in embedded mode.