docs(flagsmith): Improve README (#872)

Signed-off-by: Rodrigo López Dato <rodrigo@rolodato.com>
Co-authored-by: Todd Baert <todd.baert@dynatrace.com>

providers/flagsmith/README.md

@@ -1,14 +1,14 @@
 # Flagsmith OpenFeature Java Provider
 ![Experimental](https://img.shields.io/badge/experimental-breaking%20changes%20allowed-yellow)
 [![Download](https://img.shields.io/maven-central/v/com.flagsmith/flagsmith-java-client)](https://mvnrepository.com/artifact/com.flagsmith/flagsmith-java-client)
+
 Flagsmith provides an all-in-one platform for developing, implementing, and managing your feature flags.
 
 ## Installation
 
 <!-- x-release-please-start-version -->
 
 ```xml
-
 <dependency>
     <groupId>dev.openfeature.contrib.providers</groupId>
     <artifactId>flagsmith</artifactId>
@@ -20,24 +20,46 @@ Flagsmith provides an all-in-one platform for developing, implementing, and mana
 
 ## Usage
 
-The `FlagsmithProvider` communicates with Flagsmith using the Flagsmith java sdk. Information on the sdk can be found in
-the Flagsmith documentaiton here https://docs.flagsmith.com/clients/server-side. The following code snippet shows how to
-initialize the `FlagsmithProvider`:
+The `FlagsmithProvider` communicates with Flagsmith using the [Flagsmith Java SDK](https://docs.flagsmith.com/clients/server-side?language=java).
+This example shows how to initialize and use the Flagsmith OpenFeature provider:
 
 ```java
-FlagsmithProviderOptions options = FlagsmithProviderOptions.builder()
-    .apiKey("API_KEY")
-    .build();
-
-FlagsmithProvider provider = new FlagsmithProvider();
-OpenFeatureAPI.getInstance().setProvider(provider);
+import dev.openfeature.contrib.providers.flagsmith.FlagsmithProvider;
+import dev.openfeature.contrib.providers.flagsmith.FlagsmithProviderOptions;
+import dev.openfeature.sdk.Client;
+import dev.openfeature.sdk.MutableContext;
+import dev.openfeature.sdk.OpenFeatureAPI;
+
+public class FlagsmithExample {
+    public static void main(String[] args) {
+        FlagsmithProviderOptions options = FlagsmithProviderOptions.builder()
+                .apiKey("API_KEY")
+                .build();
+
+        FlagsmithProvider provider = new FlagsmithProvider(options);
+        OpenFeatureAPI api = OpenFeatureAPI.getInstance();
+        api.setProvider(provider);
+
+        // Optional: set a targeting key and traits to use segment and/or identity overrides
+        MutableContext evaluationContext = new MutableContext();
+        evaluationContext.setTargetingKey("my-identity-id");
+
+        Client client = api.getClient();
+        boolean flag = client.getBooleanValue("my-boolean-flag", false, evaluationContext);
+        System.out.println(flag);
+    }
+}
 ```
 
 Options can be defined using the FlagsmithProviderOptions builder. Below are all the options:
 
 | Option name | Type    | Default   | Description
 | ----------- | ------- | --------- | ---------
 | apiKey      | String  |  | Your API Token. Note that this is either the `Environment API` key or the `Server Side SDK Token`
+| baseUri      | String  | https://edge.api.flagsmith.com/api/v1/ | Override the default Flagsmith API URL if you are self-hosting.
+| localEvaluation      | boolean  | false | Controls which mode to run in; [local or remote evaluation](https://docs.flagsmith.com/clients/overview#server-side-sdks).
+| environmentRefreshIntervalSeconds      | int  | 60 | Set environment refresh rate when using local evaluation mode
+| enableAnalytics      | boolean  | false | Controls whether [Flag Analytics](https://docs.flagsmith.com/advanced-use/flag-analytics) data is sent to the Flagsmith API
 | headers      | HashMap<String, String>  |  | Add custom headers which will be sent with each network request to the Flagsmith API.
 | envFlagsCacheKey      | String  |  | Enable in-memory caching for the Flagsmith API.
 | expireCacheAfterWriteTimeUnit      | TimeUnit  | TimeUnit.MINUTES | The time unit used for cache expiry after write.
@@ -46,35 +68,11 @@ Options can be defined using the FlagsmithProviderOptions builder. Below are all
 | expireCacheAfterAccess      | int  | -1 | The integer time for cache expiry after reading.
 | maxCacheSize      | int  | -1 | The maximum size of the cache in MB.
 | recordCacheStats      | boolean  | false | Whether cache statistics should be recorded.
-| baseUri      | String  | https://edge.api.flagsmith.com/api/v1/ | Override the default Flagsmith API URL if you are self-hosting.
 | connectTimeout      | int  | 2000 | The network timeout in milliseconds.
 | writeTimeout      | int  | 5000 | The network timeout in milliseconds when writing.
 | readTimeout      | int  | 5000 | The network timeout in milliseconds when reading.
 | sslSocketFactory      | SSLSocketFactory  |  | Override the sslSocketFactory.
 | trustManager      | X509TrustManager  |  | X509TrustManager used when overriding the sslSocketFactory.
 | httpInterceptor      | Interceptor  |  | Add a custom HTTP interceptor in the form of an okhttp3.Interceptor object.
 | retries      | int  | 3 | Add a custom com.flagsmith.config.Retry object to configure the backoff / retry configuration.
-| localEvaluation      | boolean  | false | Controls which mode to run in; local or remote evaluation.
-| environmentRefreshIntervalSeconds      | int  | 60 | Set environment refresh rate with polling manager.
-| enableAnalytics      | boolean  | false | Controls whether Flag Analytics data is sent to the Flagsmith API
-| usingBooleanConfigValue      | boolean  | false | Determines whether to resolve a feature value as a boolean or use the isFeatureEnabled as the flag itself. These values will be false and true respectively.
-
-### Identity flags
-
-In order to use specific identity flags, a targeting key must be provided in the EvaluationContext provided to the flag
-evaluation method. An example of this can be seen below:
-
-```java
-FlagsmithProviderOptions options = FlagsmithProviderOptions.builder()
-    .apiKey("API_KEY")
-    .build();
-
-FlagsmithProvider provider = new FlagsmithProvider();
-OpenFeatureAPI.getInstance().setProvider(provider);
-
-EvaluationContext evaluationContext = new MutableContext();
-evaluationContext.setTargetingKey("my-identity");
-
-Client client = api.getClient();
-boolean flag = client.getBooleanValue("key", false);
-```
+| usingBooleanConfigValue      | boolean  | false | Determines whether to resolve a feature value as a boolean or use the isFeatureEnabled as the flag itself. These values will be false and true respectively.