I came across this page discussing different hash functions that mcrouter can use, but could not find an example of how a hash function can be configured if you do not want to use the default ch3. In my case, i would like to use the "wch3" with a balanced (50/50) weight between two nodes in a pool. How can i manually change the default to configure wch3?
Thanks in advance.
Here is an example that can help you:
{
"pools": {
"cold": {
"servers": [
"memc_1:11211",
"memc_2:11211"
]
},
"warm": {
"servers": [
"memc_11:11211",
"memc_12:11211"
]
}
},
"route": {
"type": "OperationSelectorRoute",
"operation_policies": {
"get": {
"type": "WarmUpRoute",
"cold": "PoolRoute|cold",
"warm": "PoolRoute|warm",
"exptime": 20
}
},
"default_policy": {
"type": "AllSyncRoute",
"children": [{
"type": "PoolRoute",
"pool": "cold",
"hash": {
"hash_func": "WeightedCh3",
"weights": [
1,
1
]
}
},
{
"type": "PoolRoute",
"pool": "warm",
"hash": {
"hash_func": "WeightedCh3",
"weights": [
1,
1
]
}
}
]
}
}
}
You can adjust the weight in the range [0.0, 1.0].
Related
I have barebone Flutter 2.5 project and Figma design tokens which were exported via Figma Tokens.
Those design tokens look like this:
project\style_dictionary\properties\tokens.json
{
"borderWidth": {
"100": {
"value": "1.5",
"type": "borderWidth"
}
},
"opacity": {
"basic": {
"100": {
"value": "0.04",
"type": "opacity"
}
}
},
"colors": {
"basic": {
"red": {
"50": {
"value": "#ffebee",
"type": "color"
}
}
}
}
}
and Style Dictionary config which looks like this
project\style_dictionary\config.json
{
"source": [
"properties/*.json"
],
"platforms": {
"flutter": {
"transformGroup": "flutter",
"buildPath": "../lib/unique_file/",
"files": [
{
"destination": "style_dictionary.dart",
"format": "flutter/class.dart",
"className": "StyleDictionary"
}
]
},
"flutter-separate": {
"transformGroup": "flutter-separate",
"buildPath": "../lib/unique_file/",
"files": [
{
"destination": "style_dictionary_color.dart",
"format": "flutter/class.dart",
"className": "StyleDictionaryColor",
"type": "color",
"filter": {
"attributes": {
"category": "colors"
}
}
}
]
}
}
}
Running style-dictionary build in CMD in style_dictionary will generate next file
project\lib\unique_file\style_dictionary_color.dart
import 'dart:ui';
class StyleDictionaryColor {
StyleDictionaryColor._();
static const basicRed50 = #ffebee;
}
But in should be like that at the end
project\lib\unique_file\style_dictionary_color.dart
import 'dart:ui';
class StyleDictionaryColor {
StyleDictionaryColor._();
static const basicRed50 = Color(0xFFFFEBEE);
}
Question:
How and where can I create Style Dictionary transforms file to create right dart file with Color type of the static variable?
I cannot modify exported design tokens.
Create a project\build.js as a custom Transforms file. Logic of creation was used from default Flutter color transforms and Documentation
const StyleDictionary = require('style-dictionary')
const baseConfig = require('./style_dictionary/config.json')
const Color = require('tinycolor2')
StyleDictionary.registerTransform({
name: 'colors/hex8flutter',
type: 'value',
matcher: prop => {
return prop.attributes.category === 'colors'
},
transformer: prop => {
var str = Color(prop.value).toHex8().toUpperCase();
return `Color(0x${str.slice(6)}${str.slice(0, 6)})`;
},
})
const StyleDictionaryExtended = StyleDictionary.extend(baseConfig)
StyleDictionaryExtended.buildAllPlatforms()
Modify project\style_dictionary\config.json so it can be executed from project directory and include new transforms - "transformColorsToColor" together with other transforms from Flutter
{
"source": [
"style_dictionary/properties/*.json"
],
"platforms": {
"flutter": {
"transforms": ["attribute/cti", "name/cti/camel", "color/hex8flutter", "size/flutter/remToDouble", "content/flutter/literal", "asset/flutter/literal", "font/flutter/literal", "colors/hex8flutter"],
"buildPath": "lib/unique_file/",
"files": [
{
"destination": "style_dictionary.dart",
"format": "flutter/class.dart",
"className": "StyleDictionary"
}
]
},
"flutter-separate": {
"transforms": ["attribute/cti", "name/ti/camel", "color/hex8flutter", "size/flutter/remToDouble", "content/flutter/literal", "asset/flutter/literal", "font/flutter/literal", "colors/hex8flutter"],
"buildPath": "lib/unique_file/",
"files": [
{
"destination": "style_dictionary_color.dart",
"format": "flutter/class.dart",
"className": "StyleDictionaryColor",
"type": "color",
"filter": {
"attributes": {
"category": "colors"
}
}
}
]
}
}
}
Run npm init with all default answers
Run npm install --save tinycolor2
Run node build.js
I'm using loopback 3 to build a backend with mongoDB.
So i have 2 models: Object and Attachment. Object have a relation Embeds2Many to Attachment.
Objects look like that in mongoDB
[
{
"fieldA": "valueA1",
"attachments": [
{
"id": 1,
"url": "abc.com/image1"
},
{
"id": 2,
"url": "abc.com/image2"
}
]
},
{
"fieldA": "valueA2",
"attachments": [
{
"id": 4,
"url": "abc.com/image4"
},
{
"id": 5,
"url": "abc.com/image5"
}
]
}
]
The question is: how can i get Objects with attachments.id=4 over the RestAPI?
I have try with the where and include filter. But it didn't work. It look like, that this function is not implemented in loopback3, right?
I have found the solution. It only works on Mongodb, Cloudant and Memory database.
{
"filter": {
"where": {
"attachments.id": 4
}
}
}
I'm forced to use the aggregation framework and the project operation of Spring Data MongoDb.
What I'd like to do is creating an array of object as a result of a project operation.
Considering this intermediate aggregation result:
{
"processes": [
{
"id": "101a",
"assignees": [
{
"id": "201a",
"username": "carl93"
},
{
"id": "202a",
"username": "susan"
}
]
},
{
"id": "101b",
"assignees": [
{
"id": "201a",
"username": "carl93"
},
{
"id": "202a",
"username": "susan"
}
]
}
]
}
I'm trying to get for each process, all the assignee usernames and ids. Hence, what I want to obtain is something like this:
[
{
"results": [
{
"id": "201a",
"value": "carl93",
"parentObjectId": "101a"
},
{
"id": "202a",
"value": "susan",
"parentObjectId": "101a"
},
{
"id": "201a",
"value": "carl93",
"parentObjectId": "101b"
},
{
"id": "202a",
"value": "susan",
"parentObjectId": "101b"
}
]
}
]
To reach this goal I'm using 2 nested VariableOperators.mapItemsOf obtaining:
org.springframework.data.mapping.MappingException: Cannot convert [Document{{id= 201a, value= carl93, parentObjectId= 101a}}, Document{{id= 202a, value = susan, parentObjectId= 101a}}]
of type class java.util.ArrayList into an instance of class java.lang.Object!
Implement a custom Converter<class java.util.ArrayList, class java.lang.Object> and register it with the CustomConversions.
Here's the code that I'm currently using:
new ProjectionOperation().and(
VariableOperators.mapItemsOf("processes")
.as("pr")
.andApply(
VariableOperators.mapItemsOf("$pr.ownership.assignees")
.as("ass")
.andApply(aggregationOperationContext -> {
Document document = new Document();
document.append("id", "$$ass.id");
document.append("value", "$$ass.username");
document.append("parentObjectId", "$$pr.id");
return document;
})
)
).as("results");
The code produces this:
[
[
{
"id": "201a",
"value": "carl93",
"parentObjectId": "101a"
},
{
"id": "202a",
"value": "susan",
"parentObjectId": "101a"
}
],
[
{
"id": "201a",
"value": "carl93",
"parentObjectId": "101b"
},
{
"id": "202a",
"value": "susan",
"parentObjectId": "101b"
}
]
]
As you can see there are 2 nested arrays, [[],[]]. This is the reason why the exception is thrown.
Nevertheless what I want to obtain is just one array, adding all the objects in it (possibly without duplicates or null values). I've tried the addToSet operator and other aggregtion operators, without any success.
Use $reduce with $concatArrays to join the arrays.
new ProjectionOperation().and(
ArrayOperators.arrayOf("processes")
.reduce(ArrayOperators.ConcatArrays.arrayOf("$$value").concat(
VariableOperators.mapItemsOf("$$this.ownership.assignees")
.as("ass")
.andApply(aggregationOperationContext -> {
Document document = new Document();
document.append("id", "$$ass.id");
document.append("value", "$$ass.username");
document.append("parentObjectId", "$$this.id");
return document;
})
)).startingWith(Arrays.asList())
).as("results");
I've crereated an index on elasticsearch same as bellow:
"settings" : {
"number_of_shards": 1,
"number_of_replicas": 0,
"analysis": {
"filter": {
"trigrams_filter": {
"type": "ngram",
"min_gram": 3,
"max_gram": 3
}
},
"analyzer": {
"trigrams": {
"type": "custom",
"tokenizer": "standard",
"filter": [
"lowercase",
"trigrams_filter"
]
}
}
}
},
"mappings": {
"issue": {
"properties": {
"description": {
"type": "string",
"analyzer": "trigrams"
}
}
}
}
My test items are bellow:
"alici onay verdi basarili satisiniz gerceklesti diyor ama hesabima para transferi gerceklesmemis"
"otomatik onay işlemi gecikmiş"
"************* nolu iade islemi urun kargoya verilmedi zamaninda iade islemlerinde urun erorr hata veriyor"
I've test this index with bellow query:
GET issue/_search
{
"query": {
"match": {
"description":{
"query": "otomatik onay istemi zamaninda gerceklesmemis"
}
}
}
}
And result:
{
....
"hits": {
....
"max_score": 2.3507352,
"hits": [
{
....
"_score": 2.3507352,
"_source": {
"issue_id": "*******",
"description": "alici onay verdi basarili satisiniz gerceklesti diyor ama hesabima para transferi gerceklesmemis"
}
}
]
}
}
But same data on postgresql with bellow SQL response another result:
SELECT
public.tbl_issue_descriptions_big.description,
similarity(description, 'otomatik onay islemi zamaninda gerceklesmemis') AS sml
FROM
public.tbl_issue_descriptions_big
WHERE
description %'otomatik onay islemi zamaninda gerceklesmemis'
ORDER BY
sml DESC
LIMIT 10
Result is:
description | sml
======================================================|======
otomatik onay islemi gecikmis |0,351852
Why is this difference caused?
I dont know enough about postgres to give a qualified answer there (as this also depends on the documents that are indexed and if they scoring formulas are exactly the same, which I doubt), but Elasticsearch has an explain API and an explain parameter in the search, that help you to find out why a certain document was scored this way.
I am using the sample project
https://github.com/spring-cloud-samples/configserver
I run the project and when i point my browser to
http://localhost:8888/foo/development/
I get the following values
{
"name": "foo",
"profiles": [
"development"
],
"label": "master",
"propertySources": [
{
"name": "overrides",
"source": {
"eureka.instance.nonSecurePort": "${CF_INSTANCE_PORT:${PORT:${server.port:8080}}}",
"eureka.instance.hostname": "${CF_INSTANCE_IP:localhost}",
"eureka.client.serviceUrl.defaultZone": "http://localhost:8761/eureka/"
}
}
]
}
But i do not get the values in the file foo-development.properties in
https://github.com/spring-cloud-samples/config-repo
I am new to spring-cloud config. Could somebody point in the right direction to the values of the property file ?
Thank you
I ran the config-server in Ubuntu and everything works there as expected. This must be a problem in windows only. The output I get in Ubuntu is the following:
{
"name": "foo",
"profiles": [
"development"
],
"label": "master",
"propertySources": [
{
"name": "overrides",
"source": {
"eureka.instance.nonSecurePort": "${CF_INSTANCE_PORT:${PORT:${server.port:8080}}}",
"eureka.instance.hostname": "${CF_INSTANCE_IP:localhost}",
"eureka.client.serviceUrl.defaultZone": "http://localhost:8761/eureka/"
}
},
{
"name": "https://github.com/spring-cloud-samples/config-repo/foo-development.properties",
"source": {
"bar": "spam"
}
},
{
"name": "https://github.com/spring-cloud-samples/config-repo/foo.properties",
"source": {
"foo": "bar"
}
},
{
"name": "https://github.com/spring-cloud-samples/config-repo/application.yml",
"source": {
"info.description": "Spring Cloud Samples",
"info.url": "https://github.com/spring-cloud-samples",
"eureka.client.serviceUrl.defaultZone": "http://user:${eureka.password:}#localhost:8761/eureka/",
"invalid.eureka.password": "<n/a>"
}
}
]
}