From acdf88b1e0df35c091ad825543001640c853e1c0 Mon Sep 17 00:00:00 2001 From: anshulp25 Date: Thu, 8 Sep 2016 19:36:17 +0530 Subject: [PATCH] Adding Initial Commit --- .gitignore | 11 ++ CHANGELOG.md | 24 +++ LICENSE | 214 +++++++++++++++++++++ README.md | 51 +++++ circle.yml | 16 ++ doc/intro.md | 5 + project.clj | 11 ++ src/zookeeper_znode_counter/core.clj | 38 ++++ test/zookeeper_znode_counter/core_test.clj | 7 + 9 files changed, 377 insertions(+) create mode 100644 .gitignore create mode 100644 CHANGELOG.md create mode 100644 LICENSE create mode 100644 README.md create mode 100644 circle.yml create mode 100644 doc/intro.md create mode 100644 project.clj create mode 100644 src/zookeeper_znode_counter/core.clj create mode 100644 test/zookeeper_znode_counter/core_test.clj diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..c53038e --- /dev/null +++ b/.gitignore @@ -0,0 +1,11 @@ +/target +/classes +/checkouts +pom.xml +pom.xml.asc +*.jar +*.class +/.lein-* +/.nrepl-port +.hgignore +.hg/ diff --git a/CHANGELOG.md b/CHANGELOG.md new file mode 100644 index 0000000..93e9be3 --- /dev/null +++ b/CHANGELOG.md @@ -0,0 +1,24 @@ +# Change Log +All notable changes to this project will be documented in this file. This change log follows the conventions of [keepachangelog.com](http://keepachangelog.com/). + +## [Unreleased] +### Changed +- Add a new arity to `make-widget-async` to provide a different widget shape. + +## [0.1.1] - 2016-08-26 +### Changed +- Documentation on how to make the widgets. + +### Removed +- `make-widget-sync` - we're all async, all the time. + +### Fixed +- Fixed widget maker to keep working when daylight savings switches over. + +## 0.1.0 - 2016-08-26 +### Added +- Files from the new template. +- Widget maker public API - `make-widget-sync`. + +[Unreleased]: https://github.com/your-name/zookeeper-znode-counter/compare/0.1.1...HEAD +[0.1.1]: https://github.com/your-name/zookeeper-znode-counter/compare/0.1.0...0.1.1 diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..7689f30 --- /dev/null +++ b/LICENSE @@ -0,0 +1,214 @@ +THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC +LICENSE ("AGREEMENT"). 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Each party waives its rights to a jury trial +in any resulting litigation. diff --git a/README.md b/README.md new file mode 100644 index 0000000..29c2689 --- /dev/null +++ b/README.md @@ -0,0 +1,51 @@ +# zookeeper-znode-counter + +Tool to count the total children recursively for a given Znode + +## Installation + +``` +lein uberjar +``` + +## Usage + +``` +java -jar zookeeper-znode-counter-0.1.0-SNAPSHOT-standalone.jar -h "zookeeper.yourserver.net" -p 2181 -z "/mesos" +``` + + + +## Options + +``` +-h/--host : Hostname of the zookeeper server +-p/--port : Port of the zookeeper server +-z/--path : Znode Path +``` + +## Bugs + +If there are high number of children for a particular Znode, it might result in following error + +``` +Exception in thread "main" org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /consumers + at org.apache.zookeeper.KeeperException.create(KeeperException.java:99) + at org.apache.zookeeper.KeeperException.create(KeeperException.java:51) + at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1472) +``` + +### Solution + +Copy the `jar` file to the zookeeper server and execute the same on zookeeper server. + + +## TODO + + +## License + +Copyright © 2016 Talentica Software India Pvt. Ltd. + +Distributed under the Eclipse Public License either version 1.0 or (at +your option) any later version. diff --git a/circle.yml b/circle.yml new file mode 100644 index 0000000..91e4b8f --- /dev/null +++ b/circle.yml @@ -0,0 +1,16 @@ +machine: + java: + version: oraclejdk8 + +general: + artifacts: + - "target/uberjar" + +checkout: + post: + - lein --version + - lein uberjar + +test: + override: + - lein --help diff --git a/doc/intro.md b/doc/intro.md new file mode 100644 index 0000000..08c03e6 --- /dev/null +++ b/doc/intro.md @@ -0,0 +1,5 @@ +# Introduction to zookeeper-znode-counter + +TODO: write [great documentation](http://jacobian.org/writing/what-to-write/) + +FIX ME diff --git a/project.clj b/project.clj new file mode 100644 index 0000000..59f48ac --- /dev/null +++ b/project.clj @@ -0,0 +1,11 @@ +(defproject zookeeper-znode-counter (str "1.0." (System/getenv "CIRCLE_BUILD_NUM")"-SNAPSHOT") + :description "FIXME: write description" + :url "http://example.com/FIXME" + :license {:name "Eclipse Public License" + :url "http://www.eclipse.org/legal/epl-v10.html"} + :dependencies [[org.clojure/clojure "1.8.0"] + [zookeeper-clj "0.9.4"] + [org.clojure/tools.cli "0.3.5"]] + :main ^:skip-aot zookeeper-znode-counter.core + :target-path "target/%s" + :profiles {:uberjar {:aot :all}}) diff --git a/src/zookeeper_znode_counter/core.clj b/src/zookeeper_znode_counter/core.clj new file mode 100644 index 0000000..0edf5c9 --- /dev/null +++ b/src/zookeeper_znode_counter/core.clj @@ -0,0 +1,38 @@ +(ns zookeeper-znode-counter.core + (:require [zookeeper :as zk] + [clojure.string :as string] + [clojure.tools.cli :refer [parse-opts]]) + (:gen-class)) + +(defn create-zk-connection [host port] + (def zkclient (zk/connect (string/join ":" [host port])))) + + +(defn count-children [path] + (let [children (zk/children zkclient path)] + (if (zero? (count children)) + 0 + (let [total (+ (count children) + (apply + (map #(count-children (str path (if (= path "/") "" "/") %)) children)))] + total)))) + +(def cli-options + [[ "-h" "--host host" "ZKHost" + :default "localhost"] + + ["-p" "--port port" "ZKPort" + :default 2181] + + ["-z" "--path path" "ZNodePath" + :default "/zookeeper"]]) + + + (defn -main + [& args] + (let [ {:keys [options]} (parse-opts args cli-options) + zkhost (:host options) + zkport (:port options) + znodepath (:path options)] + (create-zk-connection zkhost zkport) + (println (str "Total Count for " znodepath " is " (count-children znodepath)))) + (zk/close zkclient)) diff --git a/test/zookeeper_znode_counter/core_test.clj b/test/zookeeper_znode_counter/core_test.clj new file mode 100644 index 0000000..85c4358 --- /dev/null +++ b/test/zookeeper_znode_counter/core_test.clj @@ -0,0 +1,7 @@ +(ns zookeeper-znode-counter.core-test + (:require [clojure.test :refer :all] + [zookeeper-znode-counter.core :refer :all])) + +(deftest a-test + (testing "FIXME, I fail." + (is (= 0 1))))