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import scala.concurrent.duration._ | |
import scala.concurrent.ExecutionContext | |
import scala.concurrent.Future | |
import akka.pattern.after | |
import akka.actor.Scheduler | |
/** | |
* Given an operation that produces a T, returns a Future containing the result of T, unless an exception is thrown, | |
* in which case the operation will be retried after _delay_ time, if there are more possible retries, which is configured through | |
* the _retries_ parameter. If the operation does not succeed and there is no retries left, the resulting Future will contain the last failure. |
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(defn chain | |
"Composes functions, left to right, over the value `x`, returning a promise containing | |
the result. When composing, either `x` or the returned values may be values which can | |
be converted to a promise, causing the composition to be paused. | |
The returned promise will only be realized once all functions have been applied and their | |
return values realized. | |
(chain 1 inc #(future (inc %) => 3 | |
@(chain (future 1) inc inc) => 3 |
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/* | |
Copyright 2018 Viktor Klang | |
Licensed under the Apache License, Version 2.0 (the "License"); | |
you may not use this file except in compliance with the License. | |
You may obtain a copy of the License at | |
http://www.apache.org/licenses/LICENSE-2.0 | |
Unless required by applicable law or agreed to in writing, software |
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/* | |
Copyright 2013 Viktor Klang | |
Licensed under the Apache License, Version 2.0 (the "License"); | |
you may not use this file except in compliance with the License. | |
You may obtain a copy of the License at | |
http://www.apache.org/licenses/LICENSE-2.0 | |
Unless required by applicable law or agreed to in writing, software | |
distributed under the License is distributed on an "AS IS" BASIS, | |
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
See the License for the specific language governing permissions and |
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language: java | |
env: | |
global: | |
- SONATYPE_USERNAME=yourusername | |
- secure: "your encrypted SONATYPE_PASSWORD=pass" | |
after_success: | |
- python addServer.py | |
- mvn clean deploy --settings ~/.m2/mySettings.xml |
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Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
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/* | |
Copyright 2012-2021 Viktor Klang | |
Licensed under the Apache License, Version 2.0 (the "License"); | |
you may not use this file except in compliance with the License. | |
You may obtain a copy of the License at | |
http://www.apache.org/licenses/LICENSE-2.0 | |
Unless required by applicable law or agreed to in writing, software |
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require 'rubygems' | |
require 'yaml' | |
# A demonstration of YAML anchors, references and handling of nested values | |
# For more info, see: | |
# http://atechie.net/2009/07/merging-hashes-in-yaml-conf-files/ | |
stooges = YAML::load( File.read('stooges.yml') ) | |
# => { | |
# "default" => { |
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