first beta snmp input iteration

.travis.yml

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+---
+sudo: false
+language: ruby
+cache: bundler
+matrix:
+  include:
+  - rvm: jruby-9.1.13.0
+    env: LOGSTASH_BRANCH=master
+  - rvm: jruby-9.1.13.0
+    env: LOGSTASH_BRANCH=6.x
+  - rvm: jruby-9.1.13.0
+    env: LOGSTASH_BRANCH=6.0
+  - rvm: jruby-1.7.27
+    env: LOGSTASH_BRANCH=5.6
+  fast_finish: true
+install: true
+script: ci/build.sh
+jdk: oraclejdk8

CHANGELOG.md

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+## 0.1.0.beta1
+  - First beta version
+

CONTRIBUTORS

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+The following is a list of people who have contributed ideas, code, bug
+reports, or in general have helped logstash along its way.
+
+Contributors:
+* Colin Surprenant - [email protected]
+
+Note: If you've sent us patches, bug reports, or otherwise contributed to
+Logstash, and you aren't on the list above and want to be, please let us know
+and we'll make sure you're here. Contributions from folks like you are what make
+open source awesome.

DEVELOPER.md

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+# logstash-input-snmp
+Example input plugin. This should help bootstrap your effort to write your own input plugin!

Gemfile

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+source 'https://rubygems.org'
+
+gemspec
+
+logstash_path = ENV["LOGSTASH_PATH"] || "../../logstash"
+use_logstash_source = ENV["LOGSTASH_SOURCE"] && ENV["LOGSTASH_SOURCE"].to_s == "1"
+
+if Dir.exist?(logstash_path) && use_logstash_source
+  gem 'logstash-core', :path => "#{logstash_path}/logstash-core"
+  gem 'logstash-core-plugin-api', :path => "#{logstash_path}/logstash-core-plugin-api"
+end

LICENSE

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+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
+limitations under the License.

README.md

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+# Logstash Plugin
+
+This is a plugin for [Logstash](https://github.com/elastic/logstash).
+
+It is fully free and fully open source. The license is Apache 2.0, meaning you are pretty much free to use it however you want in whatever way.
+
+## Documentation
+
+Logstash provides infrastructure to automatically generate documentation for this plugin. We use the asciidoc format to write documentation so any comments in the source code will be first converted into asciidoc and then into html. All plugin documentation are placed under one [central location](http://www.elastic.co/guide/en/logstash/current/).
+
+- For formatting code or config example, you can use the asciidoc `[source,ruby]` directive
+- For more asciidoc formatting tips, see the excellent reference here https://github.com/elastic/docs#asciidoc-guide
+
+## Need Help?
+
+Need help? Try #logstash on freenode IRC or the https://discuss.elastic.co/c/logstash discussion forum.
+
+## Developing
+
+### 1. Plugin Developement and Testing
+
+#### Code
+- To get started, you'll need JRuby with the Bundler gem installed.
+
+- Create a new plugin or clone and existing from the GitHub [logstash-plugins](https://github.com/logstash-plugins) organization. We also provide [example plugins](https://github.com/logstash-plugins?query=example).
+
+- Install dependencies
+```sh
+bundle install
+```
+
+#### Test
+
+- Update your dependencies
+
+```sh
+bundle install
+```
+
+- Run tests
+
+```sh
+bundle exec rspec
+```
+
+### 2. Running your unpublished Plugin in Logstash
+
+#### 2.1 Run in a local Logstash clone
+
+- Edit Logstash `Gemfile` and add the local plugin path, for example:
+```ruby
+gem "logstash-filter-awesome", :path => "/your/local/logstash-filter-awesome"
+```
+- Install plugin
+```sh
+bin/logstash-plugin install --no-verify
+```
+- Run Logstash with your plugin
+```sh
+bin/logstash -e 'filter {awesome {}}'
+```
+At this point any modifications to the plugin code will be applied to this local Logstash setup. After modifying the plugin, simply rerun Logstash.
+
+#### 2.2 Run in an installed Logstash
+
+You can use the same **2.1** method to run your plugin in an installed Logstash by editing its `Gemfile` and pointing the `:path` to your local plugin development directory or you can build the gem and install it using:
+
+- Build your plugin gem
+```sh
+gem build logstash-filter-awesome.gemspec
+```
+- Install the plugin from the Logstash home
+```sh
+bin/logstash-plugin install /your/local/plugin/logstash-filter-awesome.gem
+```
+- Start Logstash and proceed to test the plugin
+
+## Contributing
+
+All contributions are welcome: ideas, patches, documentation, bug reports, complaints, and even something you drew up on a napkin.
+
+Programming is not a required skill. Whatever you've seen about open source and maintainers or community members  saying "send patches or die" - you will not see that here.
+
+It is more important to the community that you are able to contribute.
+
+For more information about contributing, see the [CONTRIBUTING](https://github.com/elastic/logstash/blob/master/CONTRIBUTING.md) file.

Rakefile

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+# encoding: utf-8
+require "jars/installer"
+require "fileutils"
+
+task :default do
+  system('rake -vT')
+end
+
+task :vendor do
+  exit(1) unless system './gradlew vendor'
+end
+
+task :clean do
+  ["vendor/jar-dependencies", "Gemfile.lock"].each do |p|
+    FileUtils.rm_rf(p)
+  end
+end
+

build.gradle

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+import java.nio.file.Files
+import static java.nio.file.StandardCopyOption.REPLACE_EXISTING
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you 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 limitations
+ * under the License.
+ */
+apply plugin: "java"
+apply plugin: 'maven'
+apply plugin: "distribution"
+apply plugin: "idea"
+
+group "org.logstash.inputs"
+
+sourceCompatibility = JavaVersion.VERSION_1_8
+
+buildscript {
+    repositories {
+        mavenCentral()
+        jcenter()
+    }
+
+}
+
+repositories {
+    mavenCentral()
+}
+
+task wrapper(type: Wrapper) {
+    gradleVersion = '4.0'
+}
+
+dependencies {
+    compile 'org.snmp4j:snmp4j:2.5.11'
+//    compile 'org.apache.logging.log4j:log4j-slf4j-impl:2.8.2'
+//    compile 'org.apache.logging.log4j:log4j-api:2.8.2'
+}
+task generateGemJarRequiresFile {
+    doLast {
+        File jars_file = file('lib/logstash-input-snmp_jars.rb')
+        jars_file.newWriter().withWriter { w ->
+            w << "# AUTOGENERATED BY THE GRADLE SCRIPT. DO NOT EDIT.\n\n"
+            w << "require \'jar_dependencies\'\n"
+            configurations.runtime.allDependencies.each {
+                w << "require_jar(\'${it.group}\', \'${it.name}\', \'${it.version}\')\n"
+            }
+        }
+    }
+}
+
+task vendor {
+    doLast {
+        String vendorPathPrefix = "vendor/jar-dependencies"
+        configurations.runtime.allDependencies.each { dep ->
+            File f = configurations.runtime.filter { it.absolutePath.contains("${dep.group}/${dep.name}/${dep.version}") }.singleFile
+            String groupPath = dep.group.replaceAll('\\.', '/')
+            File newJarFile = file("${vendorPathPrefix}/${groupPath}/${dep.name}/${dep.version}/${dep.name}-${dep.version}.jar")
+            newJarFile.mkdirs()
+            Files.copy(f.toPath(), newJarFile.toPath(), REPLACE_EXISTING)
+        }
+    }
+}
+
+vendor.dependsOn(generateGemJarRequiresFile)

ci/build.sh

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+#!/bin/bash
+# version: 1
+########################################################
+#
+# AUTOMATICALLY GENERATED! DO NOT EDIT
+#
+########################################################
+set -e
+
+echo "Starting build process in: `pwd`"
+source ./ci/setup.sh
+
+if [[ -f "ci/run.sh" ]]; then
+    echo "Running custom build script in: `pwd`/ci/run.sh"
+    source ./ci/run.sh
+else
+    echo "Running default build scripts in: `pwd`/ci/build.sh"
+    bundle install
+    bundle exec rake vendor
+    bundle exec rspec spec
+fi

ci/setup.sh

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+#!/bin/bash
+# version: 1
+########################################################
+#
+# AUTOMATICALLY GENERATED! DO NOT EDIT
+#
+########################################################
+set -e
+if [ "$LOGSTASH_BRANCH" ]; then
+    echo "Building plugin using Logstash source"
+    BASE_DIR=`pwd`
+    echo "Checking out branch: $LOGSTASH_BRANCH"
+    git clone -b $LOGSTASH_BRANCH https://github.com/elastic/logstash.git ../../logstash --depth 1
+    printf "Checked out Logstash revision: %s\n" "$(git -C ../../logstash rev-parse HEAD)"
+    cd ../../logstash
+    echo "Building plugins with Logstash version:"
+    cat versions.yml
+    echo "---"
+    # We need to build the jars for that specific version
+    echo "Running gradle assemble in: `pwd`"
+    ./gradlew assemble
+    cd $BASE_DIR
+    export LOGSTASH_SOURCE=1
+else
+    echo "Building plugin using released gems on rubygems"
+fi

gradle.properties

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+org.gradle.daemon=false

gradle/wrapper/gradle-wrapper.properties

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+#Wed Jun 21 11:39:16 CEST 2017
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.0-all.zip