elasticsearch自定义插件
一直想尝试自己造轮子，毕竟用了header，smartcn等插件，也很好奇es插件如何自定义。
搞了好几天，今天终于成功了，虽然只是一个hello world，但基本的流程，我相关的java类我大致搞清楚了，再次纪录一下。
es官网找到了一个链接：Writing an Elasticsearch Plugin: Getting Started，让人失望透顶，es的版本不一的情况下，我2.3.1es版本，根本没有org.elasticsearch.plugins.AbstractPlugin，
没办法继续碰壁，网上千篇一律的抄来抄去，让人厌恶。
只能继续深耕es官网文档。Help for plugin authors，
先得到一个基本的插件框架。1:如果时网页插件，必需包含
- The plugin-descriptor.properties file
- The _site/ directory
- The _site/index.html file
2：非site插件，必需包含
The plugin-descriptor.properties file
和java类文件。
基本的plugin-descriptor.properties，
description=hello - A web front end for an elastic search cluster
version=master
name=hello
version=2.3.1
### mandatory elements for site plugins:
#
# 'site': set to true to indicate contents of the _site/
# directory in the root of the plugin should be served.
site=false
#
### mandatory elements for jvm plugins :
#
# 'jvm': true if the 'classname' class should be loaded
# from jar files in the root directory of the plugin.
# Note that only jar files in the root directory are
# added to the classpath for the plugin! If you need
# other resources, package them into a resources jar.
jvm=true
#
# 'classname': the name of the class to load, fully-qualified.
classname=${elasticsearch.plugin.classname}
#
# 'java.version' version of java the code is built against
# use the system property java.specification.version
# version string must be a sequence of nonnegative decimal integers
# separated by "."'s and may have leading zeros
java.version=1.7
#
# 'elasticsearch.version' version of elasticsearch compiled against
# You will have to release a new version of the plugin for each new
# elasticsearch release. This version is checked when the plugin
# is loaded so Elasticsearch will refuse to start in the presence of
# plugins with the incorrect elasticsearch.version.
elasticsearch.version=2.3.1
#
### deprecated elements for jvm plugins :
#
# 'isolated': true if the plugin should have its own classloader.
# passing false is deprecated, and only intended to support plugins
# that have hard dependencies against each other. If this is
# not specified, then the plugin is isolated by default.
#isolated=true相关文章