---
layout: pattern
title: Tolerant Reader
folder: tolerant-reader
permalink: /patterns/tolerant-reader/
pumlid: NSZ14SCm20NHLf829ExfXaYChGn26lZ4xSVdtFRjSrZJx9AkZnFOyI9olkenSEOxGxmjWnXgMvE6viLWfmz_kNI9SLZP38XRqEIuWx1Kd0t5XVjjGVj_DNtMdLD_
categories: Integration
tags:
 - Java
 - Difficulty-Beginner
---

## Intent
Tolerant Reader is an integration pattern that helps creating
robust communication systems. The idea is to be as tolerant as possible when
reading data from another service. This way, when the communication schema
changes, the readers must not break.

![alt text](./etc/tolerant-reader.png "Tolerant Reader")

## Applicability
Use the Tolerant Reader pattern when

* the communication schema can evolve and change and yet the receiving side should not break

## Credits

* [Martin Fowler - Tolerant Reader](http://martinfowler.com/bliki/TolerantReader.html)