jackdaw | Simple configuration and mocking of Kafka clients | Pub Sub library
kandi X-RAY | jackdaw Summary
kandi X-RAY | jackdaw Summary
While Kafka is an awesome message streaming platform, it’s also a little on the heavy side — requiring a cluster of brokers at all times. This makes rapid development and component/integration testing harder than it should be; firstly, you must have access to a broker; secondly, connection establishment and topic consumer rebalancing times can be substantial, blowing out the build/test times. If only you could simulate the entire Kafka infrastructure in a JVM so that messages can be published and consumed without relying on Kafka… After all, you just want to know that your application components integrate correctly; you aren’t trying to test Kafka. Jackdaw is focused on fixing the one area in which Kafka isn’t so great — mocking. While it doesn’t simulate Kafka in its entirety, it lets you do most things within the mock. It also provides a factory interface — Kafka — that lets you easily switch between a mock and a real Kafka client connection, playing well with dependency injection. Jackdaw also makes the Java clients a little nicer to use, without obfuscating the native API. The traditional Consumer API requires continuous calls to poll() from a loop. Jackdaw introduces AsyncReceiver — a background polling thread that will invoke your nominated callback handler when messages are received. Speaking of threading, Jackdaw is also capable of pipelining message (de)serialisation, improving Kafka’s performance on multi-core processors. Bootstrapping is also simplified. Jackdaw offers [YConf] wrappers for configuring most aspects of the client.
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Top functions reviewed by kandi - BETA
- Creates the mock consumer .
- Delete consumer groups .
- Sends a record .
- Stops Kafka stack .
- Include an exception .
- Receives a record .
- Completes the collection of futures .
- Get merged properties .
- Merges the specified properties with the overrides .
- Creates a RecordDescriptor for a ConsumerRecord .
jackdaw Key Features
jackdaw Examples and Code Snippets
Community Discussions
Trending Discussions on jackdaw
QUESTION
I'm trying to disable Kafka logs in Clojure e.g.
...ANSWER
Answered 2020-Oct-19 at 19:18I think it's either a dependencies problem or an issue with the configuration file not being packaged in the expected location.
In your
project.clj
I only see one dependency for logback. Try adding the extra dependencies mentioned in this tutorial and see if makes any differenceI think it's most likely that the file is not being found at runtime, thus a default configuration is used instead (that's why you won't see the changes you expect). Check if the
logback.xml
file can be found along with the class files and not in a separate subfolder.
QUESTION
I have a BTO dataset, which I converted from long to wide format to prepare it for diversity measurements using the diversity
function from the vegan
package.
To achieve this I used this code:
...ANSWER
Answered 2020-Oct-08 at 22:08Is this what you need?
QUESTION
I am trying to extract only 32 specific Species from the data.frame
dat
and create another data.frame
with all species
into a single col
, whilst I also extract the year
, values
, and temperature
and place those into a single column. I am also placing the months that belong to each of these.
An example of data.frame
:
ANSWER
Answered 2019-Dec-04 at 00:00Consider reshape
to re-structure your data from wide to long format and then aggregate
by year, month, or assigned season.
Input
QUESTION
https://material.angular.io/guide/typography
A tutorial here says I should be able to use something like:
...ANSWER
Answered 2019-Oct-24 at 20:44in you css, wrap the style in ::ng-deep
If this is your HTML:
QUESTION
I am trying to train a custom ner in Spacy with the new entity 'ANIMAL'. But I have a data set with single words as:
...ANSWER
Answered 2019-Aug-15 at 17:08Spacy NER model training includes the extraction of other "implicit" features, such as POS and surrounding words.
When you attempt to train on single words, it is unable to get generalized enought features to detect those entities.
Take, for instance, this example extracted from Spacy's own training tutorial:
QUESTION
I have a table that contains a list of the words I would like to highlight and the text i would like to highlight it in:
...ANSWER
Answered 2019-Jun-25 at 09:49If you can accept a simplified tags
object (not a nested list), you could do it iteratively like this. Notice also that I've replaced the first word in tags
with capital S.
QUESTION
Below is the code I have now. It pulls the Job-Base-Cost just fine, however I cannot get it to pull the ID and or Name of the item. Can you help?
Link to the sites XML pull.
...ANSWER
Answered 2018-Dec-29 at 13:47This is a sample of one line of the OP's XML file
109555912.69
The OP wants to use the IMPORTXML
function to report the ID and Name as well as the Job Cost from the XML data. Presently, the OP's formula is:
=importxml("link","//job-base-cost")
There are two options:
1 - One long column
=importxml("link","//@id | //@name | //job-base-cost")
Note //@id
and //@name
in the xpath query: //
indicate nodes in the document (at any level, not just the root level) and @
indicate attributes. The pipe |
operator indicates AND. So the plain english query is to display the id, name and job-base-cost.
2 - Three columns (table format)
={IMPORTXML("link","//@name"),IMPORTXML("link","//job-base-cost"),IMPORTXML("link","//@id")}
This creates a series that will display the fields in each of three columns.
Note: there is an arrayformula that uses a single importXML function described in How do I return multiple columns of data using ImportXML in Google Spreadsheets?. Readers may want to look at whether that option can be implemented.
My thanks to @Tanaike for his comment which spurred me to look at how xpath works.
QUESTION
i am using nodejs 10.13.0. while running this code by using commands on terminal node --experimental-modules main.mjs
getting an error:
ANSWER
Answered 2018-Nov-30 at 15:17You can only export things with a name, an IIFE has no name:
QUESTION
I installed toree
with pip and unzipped the Spark binaries to
ANSWER
Answered 2018-Jul-13 at 04:28This has been a huge pain for me as well. The issue seems to be that the latest released version of Toree does not yet support spark 2.x.
The solution is to install it from source. This gist walks you through the steps to install it on ubuntu: https://gist.github.com/mikecroucher/b57a9e5a4c1a1a2045f30a901b186bdf
The short version is:
Install sbt: https://www.scala-sbt.org/1.0/docs/Setup.html
QUESTION
I have a data frame with which I am learning tidyverse
methods in R that looks like this:
ANSWER
Answered 2018-Jun-16 at 15:27I can help with a data.table
and ggplot2
solution:
First, you'll need to make your wide table a long one with melt
. Then, you're looking for position = "stack"
argument to geom_bar
:
Also, please notice that naming data
a table is bad idea, as there's a function called data()
.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install jackdaw
You can use jackdaw like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the jackdaw component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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