Changes

tesla-microservice is used for a number of different services now. Still it is a work in progress. This section will document changes and give instructions on breaking ones. Likely you will find corresponding changes in tesla-examples.

0.11.0

Utilize the iapetos library as main metrics library. Tesla-Microservice is now able to report to graphite as well as prometheus. For configuration of graphite and prometheus reporters please see the updated README.

de.otto.tesla.metrics.prometheus.core now provides some useful instrumentation functions/macros.

0.8.0

You are now able to override the name of the base config file via the runtime config. The following example will make the configuring component disgregard default.edn and use not-default.edn instead. This might be useful when deploying several applications from one repo.

{
    :default-cfg-file-name "not-default"
}

0.6.0

The behaviour of loading configuration changed.

• When using configuration via properties files, system properties and environment variables are not loaded by default any more. Use :merge-env-to-properties-config true in runtime config to achieve prior behaviour.
• For the config-file application.edn/application.properties (name can be overriden by env-var $CONFIG_FILE) is now with preference loaded as a resource from classpath. If the resource is not found, it is tried to load it as a file.

0.5.0

The scheduler is now part of the tesla-base-system.
Per default no threads are kept in the thread-pool it manages.

0.4.0

The scheduler does not have the de.otto.tesla.stateful.scheduler/schedule function anymore.
Instead it only wraps the overtone pool and provides it via de.otto.tesla.stateful.scheduler/pool.
The pool then can be used with the overtone API like that:

(overtone.at-at/every 100 #(println "Hello world") (de.otto.tesla.stateful.scheduler/pool scheduler) :desc "HelloWord Task")

0.1.24

Config can be provided via EDN-files.

Those files are looked up and merged:

• default.edn
• {your-custom}.edn
• local.edn

The {your-custom.edn} can be specified via a ENV-variable named $CONFIG_FILE. All EDN-config-files have to be located somewhere in the class path.

Even though the old properties-files are considered deprecated and will go away with future releases, you can still use them, if you specify :property-file-preferred in the runtime-config of your system:

{
    :property-file-preferred true
}

0.1.17

Fix wrapping of middleware to not apply to all routes in the application, which created problems with POST-request.

0.1.16

Speedup of unit-tests (and possibly runtime behaviour) by simpler implmentation of the :keep-alive-component.

0.1.15

The function de.otto.tesla.system/start-system is renamed to start, de.otto.tesla.system/empty-system is renamed to base-system.

tesla-microservice does not come with an embedded jetty server out of the box anymore.

To go on with jetty as before, add the new dependency in project.clj:

  [de.otto/tesla-microservice "0.1.15"]
  [de.otto/tesla-jetty "0.1.0"]

Add the server to your system before you start it. Pass any additional dependencies of the server (:example-page in this case).

(system/start (serving-with-jetty/add-server (example-system {}) :example-page))

A working example for this is in the simple-example. You can also use the ->-threading macro as demonstrated in the mongo-example.

0.1.14

The routes-component was abandoned in favour of the handler-component. In the ring library, handlers are the thing to push around (wrapping routes and middleware). You can choose your routing library now. Instead of compojure you could also use e.g. bidi.

Change components relying on the old routes-component should be trivial: Instead of adding a vector of (compojure)-routes using de.otto.tesla.stateful.routes/register-routes,

      (routes/register-routes
        routes
        [(c/GET "/test" [] (test-fn))])

just add a single ring handler using de.otto.tesla.stateful.handler/register-handler like this:

      (handlers/register-handler
        handler
        (c/routes (c/GET "/test" [] (test-fn))))

Add multiple routes like this:

      (handlers/register-handler
        handler
        (c/routes (c/GET "/route1" [] (test-fn))
                  (c/GET "/route1" [] (test-fn2))))

Note that the keyword for the dependency changed from :routes to :handler in the base system.

0.1.13

Specific logging-dependencies and the escaping-messageconverter have been removed. You now have to (read: you are able to) configure logging yourself in your app. To exactly restore the old behaviour add these dependencies to you own application:

[org.slf4j/slf4j-api "1.7.12"]
[ch.qos.logback/logback-core "1.1.3"]
[ch.qos.logback/logback-classic "1.1.3"]
[de.otto/escaping-messageconverter "0.1.1"]

in your logback.xml replace

<conversionRule conversionWord="mescaped"
                       converterClass="de.otto.tesla.util.escapingmessageconverter" />

with

<conversionRule conversionWord="mescaped"
                       converterClass="de.otto.util.escapingmessageconverter" />