prepare 6.2.0 release (#309)

## [6.2.0] - 2023-06-12
### Added:
- Custom headers can now be added to all HTTP requests with
`Components.httpConfiguration().addCustomHeader`.

---------

Co-authored-by: Eli Bishop <[email protected]>
Co-authored-by: LaunchDarklyReleaseBot <[email protected]>
Co-authored-by: Alex Engelberg <[email protected]>
Co-authored-by: Anton Mostovoy <[email protected]>
Co-authored-by: LaunchDarklyCI <[email protected]>
Co-authored-by: LaunchDarklyCI <[email protected]>
Co-authored-by: Gavin Whelan <[email protected]>
Co-authored-by: ssrm <[email protected]>
Co-authored-by: Harpo Roeder <[email protected]>
Co-authored-by: Ben Woskow <[email protected]>
Co-authored-by: Elliot <[email protected]>
Co-authored-by: Robert J. Neal <[email protected]>
Co-authored-by: Robert J. Neal <[email protected]>
Co-authored-by: Sam Stokes <[email protected]>
Co-authored-by: Ember Stevens <[email protected]>
Co-authored-by: ember-stevens <[email protected]>
Co-authored-by: Alex Engelberg <[email protected]>
Co-authored-by: Louis Chan <[email protected]>
Co-authored-by: Louis Chan <[email protected]>
Co-authored-by: Todd Anderson <[email protected]>
Co-authored-by: tanderson-ld <[email protected]>
Co-authored-by: Matthew M. Keeler <[email protected]>

Author: 17 people

README.md

@@ -5,7 +5,7 @@
 
 ## LaunchDarkly overview
 
-[LaunchDarkly](https://www.launchdarkly.com) is a feature management platform that serves over 100 billion feature flags daily to help teams build better software, faster. [Get started](https://docs.launchdarkly.com/home/getting-started) using LaunchDarkly today!
+[LaunchDarkly](https://www.launchdarkly.com) is a feature management platform that serves trillions of feature flags daily to help teams build better software, faster. [Get started](https://docs.launchdarkly.com/home/getting-started) using LaunchDarkly today!
 
 [![Twitter Follow](https://img.shields.io/twitter/follow/launchdarkly.svg?style=social&label=Follow&maxAge=2592000)](https://twitter.com/intent/follow?screen_name=launchdarkly)
 
@@ -54,7 +54,7 @@ Unlike some other languages, in Java the DNS caching behavior is controlled by t
 
 ## Learn more
 
-Check out our [documentation](https://docs.launchdarkly.com) for in-depth instructions on configuring and using LaunchDarkly. You can also head straight to the [complete reference guide for this SDK](https://docs.launchdarkly.com/docs/java-sdk-reference) or our [code-generated API documentation](https://launchdarkly.github.io/java-server-sdk/).
+Read our [documentation](https://docs.launchdarkly.com) for in-depth instructions on configuring and using LaunchDarkly. You can also head straight to the [complete reference guide for this SDK](https://docs.launchdarkly.com/docs/java-sdk-reference) or our [code-generated API documentation](https://launchdarkly.github.io/java-server-sdk/).
 
 ## Testing
 

src/main/java/com/launchdarkly/sdk/server/ComponentsImpl.java

@@ -39,6 +39,8 @@
 import java.net.Proxy;
 import java.net.URI;
 import java.time.Duration;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.Future;
 
@@ -325,10 +327,12 @@ static final class HttpConfigurationBuilderImpl extends HttpConfigurationBuilder
     @Override
     public HttpConfiguration build(ClientContext clientContext) {
       LDLogger logger = clientContext.getBaseLogger();
+
       // Build the default headers
-      ImmutableMap.Builder<String, String> headers = ImmutableMap.builder();
+      Map<String, String> headers = new HashMap<>();
       headers.put("Authorization", clientContext.getSdkKey());
       headers.put("User-Agent", "JavaClient/" + Version.SDK_VERSION);
+
       if (clientContext.getApplicationInfo() != null) {
         String tagHeader = Util.applicationTagHeader(clientContext.getApplicationInfo(), logger);
         if (!tagHeader.isEmpty()) {
@@ -337,14 +341,18 @@ public HttpConfiguration build(ClientContext clientContext) {
       }
       if (wrapperName != null) {
         String wrapperId = wrapperVersion == null ? wrapperName : (wrapperName + "/" + wrapperVersion);
-        headers.put("X-LaunchDarkly-Wrapper", wrapperId);        
+        headers.put("X-LaunchDarkly-Wrapper", wrapperId);
+      }
+
+      if (!customHeaders.isEmpty()) {
+          headers.putAll(customHeaders);
       }
 
       Proxy proxy = proxyHost == null ? null : new Proxy(Proxy.Type.HTTP, new InetSocketAddress(proxyHost, proxyPort));
 
       return new HttpConfiguration(
           connectTimeout,
-          headers.build(),
+          headers,
           proxy,
           proxyAuth,
           socketFactory,

src/main/java/com/launchdarkly/sdk/server/integrations/HttpConfigurationBuilder.java

@@ -6,6 +6,8 @@
 import com.launchdarkly.sdk.server.subsystems.HttpConfiguration;
 
 import java.time.Duration;
+import java.util.HashMap;
+import java.util.Map;
 
 import javax.net.SocketFactory;
 import javax.net.ssl.SSLSocketFactory;
@@ -45,6 +47,7 @@ public abstract class HttpConfigurationBuilder implements ComponentConfigurer<Ht
   protected Duration connectTimeout = DEFAULT_CONNECT_TIMEOUT;
   protected HttpAuthentication proxyAuth;
   protected String proxyHost;
+  protected Map<String, String> customHeaders = new HashMap<>();
   protected int proxyPort;
   protected Duration socketTimeout = DEFAULT_SOCKET_TIMEOUT;
   protected SocketFactory socketFactory;
@@ -137,6 +140,21 @@ public HttpConfigurationBuilder sslSocketFactory(SSLSocketFactory sslSocketFacto
     return this;
   }
 
+    /**
+     * Specifies a custom HTTP header that should be added to all SDK requests.
+     * <p>
+     * This may be helpful if you are using a gateway or proxy server that requires a specific header in requests. You
+     * may add any number of headers.
+     *
+     * @param headerName standard HTTP header
+     * @param headerValue standard HTTP value
+     * @return the builder
+     */
+    public HttpConfigurationBuilder addCustomHeader(String headerName, String headerValue) {
+      this.customHeaders.put(headerName, headerValue);
+      return this;
+  }
+
   /**
    * For use by wrapper libraries to set an identifying name for the wrapper being used. This will be included in a
    * header during requests to the LaunchDarkly servers to allow recording metrics on the usage of

src/test/java/com/launchdarkly/sdk/server/integrations/HttpConfigurationBuilderTest.java

@@ -34,13 +34,13 @@
 public class HttpConfigurationBuilderTest {
   private static final String SDK_KEY = "sdk-key";
   private static final ClientContext BASIC_CONTEXT = new ClientContext(SDK_KEY);
-  
+
   private static ImmutableMap.Builder<String, String> buildBasicHeaders() {
     return ImmutableMap.<String, String>builder()
         .put("Authorization", SDK_KEY)
         .put("User-Agent", "JavaClient/" + getSdkVersion());
   }
-  
+
   @Test
   public void testDefaults() {
     HttpConfiguration hc = Components.httpConfiguration().build(BASIC_CONTEXT);
@@ -54,6 +54,25 @@ public void testDefaults() {
     assertEquals(buildBasicHeaders().build(), ImmutableMap.copyOf(hc.getDefaultHeaders()));
   }
 
+  @Test
+  public void testCanSetCustomHeaders() {
+      HttpConfiguration hc = Components.httpConfiguration()
+              .addCustomHeader("X-LaunchDarkly-Test-Label", "my-cool-label")
+              .addCustomHeader("X-Header-Message", "Java FTW")
+              .addCustomHeader("Authorization", "I can override this")
+              .addCustomHeader("User-Agent", "This too")
+              .build(BASIC_CONTEXT);
+
+      ImmutableMap<String, String> expectedHeaders = ImmutableMap.<String, String>builder()
+              .put("X-LaunchDarkly-Test-Label", "my-cool-label")
+              .put("X-Header-Message", "Java FTW")
+              .put("Authorization", "I can override this")
+              .put("User-Agent", "This too")
+              .build();
+
+      assertEquals(expectedHeaders, ImmutableMap.copyOf(hc.getDefaultHeaders()));
+  }
+
   @Test
   public void testConnectTimeout() {
     HttpConfiguration hc = Components.httpConfiguration()
@@ -101,7 +120,7 @@ public void testSocketTimeout() {
         .build(BASIC_CONTEXT);
     assertEquals(DEFAULT_SOCKET_TIMEOUT, hc2.getSocketTimeout());
   }
-  
+
   @Test
   public void testSocketFactory() {
     SocketFactory sf = new StubSocketFactory();
@@ -110,7 +129,7 @@ public void testSocketFactory() {
         .build(BASIC_CONTEXT);
     assertSame(sf, hc.getSocketFactory());
   }
-  
+
   @Test
   public void testSslOptions() {
     SSLSocketFactory sf = new StubSSLSocketFactory();
@@ -146,22 +165,22 @@ public void testApplicationTags() {
         .build(contextWithTags);
     assertEquals("application-id/authentication-service application-version/1.0.0", ImmutableMap.copyOf(hc.getDefaultHeaders()).get("X-LaunchDarkly-Tags"));
   }
-  
+
   public static class StubSocketFactory extends SocketFactory {
     public Socket createSocket(InetAddress address, int port, InetAddress localAddress, int localPort)
         throws IOException {
       return null;
     }
-    
+
     public Socket createSocket(String host, int port, InetAddress localHost, int localPort)
         throws IOException, UnknownHostException {
       return null;
     }
-    
+
     public Socket createSocket(InetAddress host, int port) throws IOException {
       return null;
     }
-    
+
     public Socket createSocket(String host, int port) throws IOException, UnknownHostException {
       return null;
     }
@@ -176,40 +195,40 @@ public Socket createSocket(InetAddress address, int port, InetAddress localAddre
         throws IOException {
       return null;
     }
-    
+
     public Socket createSocket(String host, int port, InetAddress localHost, int localPort)
         throws IOException, UnknownHostException {
       return null;
     }
-    
+
     public Socket createSocket(InetAddress host, int port) throws IOException {
       return null;
     }
-    
+
     public Socket createSocket(String host, int port) throws IOException, UnknownHostException {
       return null;
     }
-    
+
     public String[] getSupportedCipherSuites() {
       return null;
     }
-    
+
     public String[] getDefaultCipherSuites() {
       return null;
     }
-    
+
     public Socket createSocket(Socket s, String host, int port, boolean autoClose) throws IOException {
       return null;
     }
   }
-  
+
   public static class StubX509TrustManager implements X509TrustManager {
     public X509Certificate[] getAcceptedIssuers() {
       return null;
     }
-    
+
     public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {}
-    
+
     public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {}
   }
 }