feat: Go feature flag provider (#106)

GO Feature Flag provider init

Signed-off-by: Thomas Poignant <[email protected]>

Author: thomaspoignant

pom.xml

@@ -29,6 +29,7 @@
     <modules>
         <module>hooks/open-telemetry</module>
         <module>providers/flagd</module>
+        <module>providers/go-feature-flag</module>
     </modules>
 
     <scm>
@@ -45,7 +46,7 @@
 
     <dependencies>
         <dependency>
-        <!-- provided -->    
+        <!-- provided -->
             <groupId>dev.openfeature</groupId>
             <artifactId>javasdk</artifactId>
             <!-- 0.2.0 or greater -->

providers/go-feature-flag/README.md

@@ -0,0 +1,30 @@
+# GO Feature Flag Java Provider
+
+GO Feature Flag provider allows you to connect to your [GO Feature Flag relay proxy](https://gofeatureflag.org) instance.
+
+## How to use this provider?
+
+To initialize your instance please follow this example:
+
+```java
+import dev.openfeature.contrib.providers.gofeatureflag;
+
+// ...
+new GoFeatureFlagProvider(
+  GoFeatureFlagProviderOptions
+  .builder()
+  .endpoint("https://my-gofeatureflag-instance.org")
+  .timeout(1000)
+  .build());
+```
+
+You will have a new instance ready to be used with your `open-feature` java SDK.
+
+### Options
+
+| name                     | mandatory | Description                                                                                                    |
+|--------------------------|-----------|----------------------------------------------------------------------------------------------------------------|
+| **`endpoint`**           | `true`    | endpoint contains the DNS of your GO Feature Flag relay proxy _(ex: https://mydomain.com/gofeatureflagproxy/)_ |
+| **`timeout`**            | `false`   | timeout in millisecond we are waiting when calling the go-feature-flag relay proxy API. _(default: 10000)_     |
+| **`maxIdleConnections`** | `false`   | maxIdleConnections is the maximum number of connexions in the connexion pool. _(default: 1000)_                |
+| **`keepAliveDuration`**  | `false`   | keepAliveDuration is the time in millisecond we keep the connexion open. _(default: 7200000 (2 hours))_        |

providers/go-feature-flag/lombok.config

@@ -0,0 +1,5 @@
+# This file is needed to avoid errors throw by findbugs when working with lombok.
+lombok.addSuppressWarnings = true
+lombok.addLombokGeneratedAnnotation = true
+config.stopBubbling = true
+lombok.extern.findbugs.addSuppressFBWarnings = true

providers/go-feature-flag/pom.xml

@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>dev.openfeature.contrib</groupId>
+        <artifactId>parent</artifactId>
+        <version>0.0.2</version>
+        <relativePath>../../pom.xml</relativePath>
+    </parent>
+    <groupId>dev.openfeature.contrib.providers</groupId>
+    <artifactId>go-feature-flag</artifactId>
+    <version>0.1.0</version> <!--x-release-please-version -->
+
+    <name>go-feature-flag</name>
+    <description>GO Feature Flag provider for Java</description>
+    <url>https://gofeatureflag.org</url>
+
+    <developers>
+        <developer>
+            <id>thomaspoignant</id>
+            <name>Thomas Poignant</name>
+            <organization>go-feature-flag</organization>
+            <url>https://gofeatureflag.org</url>
+        </developer>
+    </developers>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.fasterxml.jackson.datatype</groupId>
+            <artifactId>jackson-datatype-jsr310</artifactId>
+            <version>2.13.4</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>2.13.4</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.squareup.okhttp3</groupId>
+            <artifactId>okhttp</artifactId>
+            <version>4.10.0</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.squareup.okhttp3</groupId>
+            <artifactId>mockwebserver</artifactId>
+            <version>4.10.0</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>