prepare 5.6.0 release (#242)

build.gradle

@@ -121,15 +121,13 @@ libraries.optional = [
 
 // Add dependencies to "libraries.test" that are used only in unit tests.
 libraries.test = [
-	// Note that the okhttp3 test deps must be kept in sync with the okhttp version used in okhttp-eventsource
-    "com.squareup.okhttp3:mockwebserver:${versions.okhttp}",
-    "com.squareup.okhttp3:okhttp-tls:${versions.okhttp}",
     "org.hamcrest:hamcrest-all:1.3",
     "org.easymock:easymock:3.4",
     "junit:junit:4.12",
     "ch.qos.logback:logback-classic:1.1.7",
     "com.fasterxml.jackson.core:jackson-core:${versions.jackson}",
-    "com.fasterxml.jackson.core:jackson-databind:${versions.jackson}"
+    "com.fasterxml.jackson.core:jackson-databind:${versions.jackson}",
+    "com.launchdarkly:test-helpers:1.0.0"
 ]
 
 configurations {

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

@@ -187,6 +187,11 @@ public static PollingDataSourceBuilder pollingDataSource() {
     return new PollingDataSourceBuilderImpl();
   }
 
+  // For testing only - allows us to override the minimum polling interval
+  static PollingDataSourceBuilderImpl pollingDataSourceInternal() {
+    return new PollingDataSourceBuilderImpl();
+  }
+
   /**
    * Returns a configuration object that disables a direct connection with LaunchDarkly for feature flag updates.
    * <p>

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

@@ -33,6 +33,7 @@
 import java.net.InetSocketAddress;
 import java.net.Proxy;
 import java.net.URI;
+import java.time.Duration;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.Future;
 
@@ -143,7 +144,6 @@ public DataSource createDataSource(ClientContext context, DataSourceUpdates data
       return new StreamProcessor(
           context.getHttp(),
           dataSourceUpdates,
-          null,
           context.getBasic().getThreadPriority(),
           ClientContextImpl.get(context).diagnosticAccumulator,
           streamUri,
@@ -165,6 +165,12 @@ public LDValue describeConfiguration(BasicConfiguration basicConfiguration) {
   }
 
   static final class PollingDataSourceBuilderImpl extends PollingDataSourceBuilder implements DiagnosticDescription {
+    // for testing only
+    PollingDataSourceBuilderImpl pollIntervalWithNoMinimum(Duration pollInterval) {
+      this.pollInterval = pollInterval;
+      return this;
+    }
+
     @Override
     public DataSource createDataSource(ClientContext context, DataSourceUpdates dataSourceUpdates) {
       // Note, we log startup messages under the LDClient class to keep logs more readable

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

@@ -111,6 +111,10 @@ private void poll() {
       } else {
         dataSourceUpdates.updateStatus(State.OFF, errorInfo);
         initFuture.complete(null); // if client is initializing, make it stop waiting; has no effect if already inited
+        if (task != null) {
+          task.cancel(true);
+          task = null;
+        }
       }
     } catch (IOException e) {
       checkIfErrorIsRecoverableAndLog(logger, e.toString(), ERROR_CONTEXT_MESSAGE, 0, WILL_RETRY_MESSAGE);

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

@@ -84,7 +84,6 @@ final class StreamProcessor implements DataSource {
   @VisibleForTesting final URI streamUri;
   @VisibleForTesting final Duration initialReconnectDelay;
   private final DiagnosticAccumulator diagnosticAccumulator;
-  private final EventSourceCreator eventSourceCreator;
   private final int threadPriority;
   private final DataStoreStatusProvider.StatusListener statusListener;
   private volatile EventSource es;
@@ -94,34 +93,9 @@ final class StreamProcessor implements DataSource {
 
   ConnectionErrorHandler connectionErrorHandler = createDefaultConnectionErrorHandler(); // exposed for testing
 
-  static final class EventSourceParams {
-    final EventHandler handler;
-    final URI streamUri;
-    final Duration initialReconnectDelay;
-    final ConnectionErrorHandler errorHandler;
-    final Headers headers;
-    final HttpConfiguration httpConfig;
-
-    EventSourceParams(EventHandler handler, URI streamUri, Duration initialReconnectDelay,
-        ConnectionErrorHandler errorHandler, Headers headers, HttpConfiguration httpConfig) {
-      this.handler = handler;
-      this.streamUri = streamUri;
-      this.initialReconnectDelay = initialReconnectDelay;
-      this.errorHandler = errorHandler;
-      this.headers = headers;
-      this.httpConfig = httpConfig;
-    }
-  }
-
-  @FunctionalInterface
-  static interface EventSourceCreator {
-    EventSource createEventSource(EventSourceParams params);
-  }
-
   StreamProcessor(
       HttpConfiguration httpConfig,
       DataSourceUpdates dataSourceUpdates,
-      EventSourceCreator eventSourceCreator,
       int threadPriority,
       DiagnosticAccumulator diagnosticAccumulator,
       URI streamUri,
@@ -130,7 +104,6 @@ static interface EventSourceCreator {
     this.dataSourceUpdates = dataSourceUpdates;
     this.httpConfig = httpConfig;
     this.diagnosticAccumulator = diagnosticAccumulator;
-    this.eventSourceCreator = eventSourceCreator != null ? eventSourceCreator : this::defaultEventSourceCreator;
     this.threadPriority = threadPriority;
     this.streamUri = streamUri;
     this.initialReconnectDelay = initialReconnectDelay;
@@ -202,13 +175,26 @@ public Future<Void> start() {
     };
 
     EventHandler handler = new StreamEventHandler(initFuture);
-
-    es = eventSourceCreator.createEventSource(new EventSourceParams(handler,
-        concatenateUriPath(streamUri, STREAM_URI_PATH),
-        initialReconnectDelay,
-        wrappedConnectionErrorHandler,
-        headers,
-        httpConfig));
+    URI endpointUri = concatenateUriPath(streamUri, STREAM_URI_PATH);
+
+    EventSource.Builder builder = new EventSource.Builder(handler, endpointUri)
+        .threadPriority(threadPriority)
+        .loggerBaseName(Loggers.DATA_SOURCE_LOGGER_NAME)
+        .clientBuilderActions(new EventSource.Builder.ClientConfigurer() {
+          public void configure(OkHttpClient.Builder builder) {
+            configureHttpClientBuilder(httpConfig, builder);
+          }
+        })
+        .connectionErrorHandler(wrappedConnectionErrorHandler)
+        .headers(headers)
+        .reconnectTime(initialReconnectDelay)
+        .readTimeout(DEAD_CONNECTION_INTERVAL);
+    // Note that this is not the same read timeout that can be set in LDConfig.  We default to a smaller one
+    // there because we don't expect long delays within any *non*-streaming response that the LD client gets.
+    // A read timeout on the stream will result in the connection being cycled, so we set this to be slightly
+    // more than the expected interval between heartbeat signals.
+
+    es = builder.build();
     esStarted = System.currentTimeMillis();
     es.start();
     return initFuture;
@@ -356,27 +342,6 @@ public void onError(Throwable throwable) {
     }  
   }
 
-  private EventSource defaultEventSourceCreator(EventSourceParams params) {
-    EventSource.Builder builder = new EventSource.Builder(params.handler, params.streamUri)
-        .threadPriority(threadPriority)
-        .loggerBaseName(Loggers.DATA_SOURCE_LOGGER_NAME)
-        .clientBuilderActions(new EventSource.Builder.ClientConfigurer() {
-          public void configure(OkHttpClient.Builder builder) {
-            configureHttpClientBuilder(params.httpConfig, builder);
-          }
-        })
-        .connectionErrorHandler(params.errorHandler)
-        .headers(params.headers)
-        .reconnectTime(params.initialReconnectDelay)
-        .readTimeout(DEAD_CONNECTION_INTERVAL);
-    // Note that this is not the same read timeout that can be set in LDConfig.  We default to a smaller one
-    // there because we don't expect long delays within any *non*-streaming response that the LD client gets.
-    // A read timeout on the stream will result in the connection being cycled, so we set this to be slightly
-    // more than the expected interval between heartbeat signals.
-
-    return builder.build();
-  }
-
   private static Map.Entry<DataKind, String> getKindAndKeyFromStreamApiPath(String path) throws StreamInputException {
     if (path == null) {
       throw new StreamInputException("missing item path");

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

@@ -1,7 +1,5 @@
 package com.launchdarkly.sdk.server.integrations;
 
-import com.launchdarkly.sdk.server.LDConfig;
-
 /**
  * Integration between the LaunchDarkly SDK and file data.
  * <p>
@@ -59,9 +57,9 @@ public enum DuplicateKeysHandling {
    * This will cause the client <i>not</i> to connect to LaunchDarkly to get feature flags. The
    * client may still make network connections to send analytics events, unless you have disabled
    * this with {@link com.launchdarkly.sdk.server.Components#noEvents()}. IMPORTANT: Do <i>not</i>
-   * set {@link LDConfig.Builder#offline(boolean)} to {@code true}; doing so would not just put the
-   * SDK "offline" with regard to LaunchDarkly, but will completely turn off all flag data sources
-   * to the SDK <i>including the file data source</i>.
+   * set {@link com.launchdarkly.sdk.server.LDConfig.Builder#offline(boolean)} to {@code true}; doing so
+   * would not just put the SDK "offline" with regard to LaunchDarkly, but will completely turn off
+   * all flag data sources to the SDK <i>including the file data source</i>.
    * <p>
    * Flag data files can be either JSON or YAML. They contain an object with three possible
    * properties:

src/test/java/com/launchdarkly/sdk/server/DataStoreTestTypes.java

@@ -3,6 +3,8 @@
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Maps;
+import com.launchdarkly.sdk.LDValue;
+import com.launchdarkly.sdk.ObjectBuilder;
 import com.launchdarkly.sdk.server.DataModel.VersionedData;
 import com.launchdarkly.sdk.server.interfaces.DataStoreTypes.DataKind;
 import com.launchdarkly.sdk.server.interfaces.DataStoreTypes.FullDataSet;
@@ -137,6 +139,15 @@ private static ItemDescriptor deserializeTestItem(String s) {
   public static class DataBuilder {
     private Map<DataKind, Map<String, ItemDescriptor>> data = new HashMap<>();
 
+    public static DataBuilder forStandardTypes() {
+      // This just ensures that we use realistic-looking data sets in our tests when simulating
+      // an LD service response, which will always include "flags" and "segments" even if empty.
+      DataBuilder ret = new DataBuilder();
+      ret.add(DataModel.FEATURES);
+      ret.add(DataModel.SEGMENTS);
+      return ret;
+    }
+
     public DataBuilder add(DataKind kind, TestItem... items) {
       return addAny(kind, items);
     }
@@ -182,5 +193,19 @@ public FullDataSet<SerializedItemDescriptor> buildSerialized() {
                 )
           ).entrySet());
     }
+
+    public LDValue buildJson() {
+      FullDataSet<SerializedItemDescriptor> allData = buildSerialized();
+      ObjectBuilder allBuilder = LDValue.buildObject();
+      for (Map.Entry<DataKind, KeyedItems<SerializedItemDescriptor>> coll: allData.getData()) {
+        String namespace = coll.getKey().getName().equals("features") ? "flags" : coll.getKey().getName();
+        ObjectBuilder itemsBuilder = LDValue.buildObject();
+        for (Map.Entry<String, SerializedItemDescriptor> item: coll.getValue().getItems()) {
+          itemsBuilder.put(item.getKey(), LDValue.parse(item.getValue().getSerializedItem()));
+        }
+        allBuilder.put(namespace, itemsBuilder.build());
+      }
+      return allBuilder.build();
+    }
   }
 }